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-rw-r--r--src/boot.c577
-rw-r--r--src/boot.h32
-rw-r--r--src/charconv.c59
-rw-r--r--src/charconv.h9
-rw-r--r--src/check.c1055
-rw-r--r--src/check.h40
-rw-r--r--src/common.c119
-rw-r--r--src/common.h58
-rw-r--r--src/dosfsck.c224
-rw-r--r--src/dosfsck.h216
-rw-r--r--src/dosfslabel.c144
-rw-r--r--src/fat.c550
-rw-r--r--src/fat.h85
-rw-r--r--src/file.c286
-rw-r--r--src/file.h70
-rw-r--r--src/io.c231
-rw-r--r--src/io.h71
-rw-r--r--src/lfn.c524
-rw-r--r--src/lfn.h39
-rw-r--r--src/mkdosfs.c1734
-rw-r--r--src/version.h29
21 files changed, 6152 insertions, 0 deletions
diff --git a/src/boot.c b/src/boot.c
new file mode 100644
index 0000000..87c98f7
--- /dev/null
+++ b/src/boot.c
@@ -0,0 +1,577 @@
+/* boot.c - Read and analyze ia PC/MS-DOS boot sector
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "fat.h"
+#include "io.h"
+#include "boot.h"
+#include "check.h"
+
+#define ROUND_TO_MULTIPLE(n,m) ((n) && (m) ? (n)+(m)-1-((n)-1)%(m) : 0)
+ /* don't divide by zero */
+
+/* cut-over cluster counts for FAT12 and FAT16 */
+#define FAT12_THRESHOLD 4085
+#define FAT16_THRESHOLD 65525
+
+static struct {
+ __u8 media;
+ char *descr;
+} mediabytes[] = {
+ {
+ 0xf0, "5.25\" or 3.5\" HD floppy"}, {
+ 0xf8, "hard disk"}, {
+ 0xf9, "3,5\" 720k floppy 2s/80tr/9sec or "
+ "5.25\" 1.2M floppy 2s/80tr/15sec"}, {
+ 0xfa, "5.25\" 320k floppy 1s/80tr/8sec"}, {
+ 0xfb, "3.5\" 640k floppy 2s/80tr/8sec"}, {
+ 0xfc, "5.25\" 180k floppy 1s/40tr/9sec"}, {
+ 0xfd, "5.25\" 360k floppy 2s/40tr/9sec"}, {
+ 0xfe, "5.25\" 160k floppy 1s/40tr/8sec"}, {
+0xff, "5.25\" 320k floppy 2s/40tr/8sec"},};
+
+#if defined __alpha || defined __arm || defined __arm__ || defined __ia64__ || defined __x86_64__ \
+ || defined __ppc64__ || defined __bfin__ || defined __MICROBLAZE__
+/* Unaligned fields must first be copied byte-wise */
+#define GET_UNALIGNED_W(f) \
+ ({ \
+ unsigned short __v; \
+ memcpy( &__v, &f, sizeof(__v) ); \
+ CF_LE_W( *(unsigned short *)&__v ); \
+ })
+#else
+#define GET_UNALIGNED_W(f) CF_LE_W( *(unsigned short *)&f )
+#endif
+
+static char *get_media_descr(unsigned char media)
+{
+ int i;
+
+ for (i = 0; i < sizeof(mediabytes) / sizeof(*mediabytes); ++i) {
+ if (mediabytes[i].media == media)
+ return (mediabytes[i].descr);
+ }
+ return ("undefined");
+}
+
+static void dump_boot(DOS_FS * fs, struct boot_sector *b, unsigned lss)
+{
+ unsigned short sectors;
+
+ printf("Boot sector contents:\n");
+ if (!atari_format) {
+ char id[9];
+ strncpy(id, (const char *)b->system_id, 8);
+ id[8] = 0;
+ printf("System ID \"%s\"\n", id);
+ } else {
+ /* On Atari, a 24 bit serial number is stored at offset 8 of the boot
+ * sector */
+ printf("Serial number 0x%x\n",
+ b->system_id[5] | (b->
+ system_id[6] << 8) | (b->system_id[7] << 16));
+ }
+ printf("Media byte 0x%02x (%s)\n", b->media, get_media_descr(b->media));
+ printf("%10d bytes per logical sector\n", GET_UNALIGNED_W(b->sector_size));
+ printf("%10d bytes per cluster\n", fs->cluster_size);
+ printf("%10d reserved sector%s\n", CF_LE_W(b->reserved),
+ CF_LE_W(b->reserved) == 1 ? "" : "s");
+ printf("First FAT starts at byte %llu (sector %llu)\n",
+ (unsigned long long)fs->fat_start,
+ (unsigned long long)fs->fat_start / lss);
+ printf("%10d FATs, %d bit entries\n", b->fats, fs->fat_bits);
+ printf("%10d bytes per FAT (= %u sectors)\n", fs->fat_size,
+ fs->fat_size / lss);
+ if (!fs->root_cluster) {
+ printf("Root directory starts at byte %llu (sector %llu)\n",
+ (unsigned long long)fs->root_start,
+ (unsigned long long)fs->root_start / lss);
+ printf("%10d root directory entries\n", fs->root_entries);
+ } else {
+ printf("Root directory start at cluster %lu (arbitrary size)\n",
+ fs->root_cluster);
+ }
+ printf("Data area starts at byte %llu (sector %llu)\n",
+ (unsigned long long)fs->data_start,
+ (unsigned long long)fs->data_start / lss);
+ printf("%10lu data clusters (%llu bytes)\n", fs->clusters,
+ (unsigned long long)fs->clusters * fs->cluster_size);
+ printf("%u sectors/track, %u heads\n", CF_LE_W(b->secs_track),
+ CF_LE_W(b->heads));
+ printf("%10u hidden sectors\n", atari_format ?
+ /* On Atari, the hidden field is only 16 bit wide and unused */
+ (((unsigned char *)&b->hidden)[0] |
+ ((unsigned char *)&b->hidden)[1] << 8) : CF_LE_L(b->hidden));
+ sectors = GET_UNALIGNED_W(b->sectors);
+ printf("%10u sectors total\n", sectors ? sectors : CF_LE_L(b->total_sect));
+}
+
+static void check_backup_boot(DOS_FS * fs, struct boot_sector *b, int lss)
+{
+ struct boot_sector b2;
+
+ if (!fs->backupboot_start) {
+ printf("There is no backup boot sector.\n");
+ if (CF_LE_W(b->reserved) < 3) {
+ printf("And there is no space for creating one!\n");
+ return;
+ }
+ if (interactive)
+ printf("1) Create one\n2) Do without a backup\n");
+ else
+ printf(" Auto-creating backup boot block.\n");
+ if (!interactive || get_key("12", "?") == '1') {
+ int bbs;
+ /* The usual place for the backup boot sector is sector 6. Choose
+ * that or the last reserved sector. */
+ if (CF_LE_W(b->reserved) >= 7 && CF_LE_W(b->info_sector) != 6)
+ bbs = 6;
+ else {
+ bbs = CF_LE_W(b->reserved) - 1;
+ if (bbs == CF_LE_W(b->info_sector))
+ --bbs; /* this is never 0, as we checked reserved >= 3! */
+ }
+ fs->backupboot_start = bbs * lss;
+ b->backup_boot = CT_LE_W(bbs);
+ fs_write(fs->backupboot_start, sizeof(*b), b);
+ fs_write((loff_t) offsetof(struct boot_sector, backup_boot),
+ sizeof(b->backup_boot), &b->backup_boot);
+ printf("Created backup of boot sector in sector %d\n", bbs);
+ return;
+ } else
+ return;
+ }
+
+ fs_read(fs->backupboot_start, sizeof(b2), &b2);
+ if (memcmp(b, &b2, sizeof(b2)) != 0) {
+ /* there are any differences */
+ __u8 *p, *q;
+ int i, pos, first = 1;
+ char buf[20];
+
+ printf("There are differences between boot sector and its backup.\n");
+ printf("Differences: (offset:original/backup)\n ");
+ pos = 2;
+ for (p = (__u8 *) b, q = (__u8 *) & b2, i = 0; i < sizeof(b2);
+ ++p, ++q, ++i) {
+ if (*p != *q) {
+ sprintf(buf, "%s%u:%02x/%02x", first ? "" : ", ",
+ (unsigned)(p - (__u8 *) b), *p, *q);
+ if (pos + strlen(buf) > 78)
+ printf("\n "), pos = 2;
+ printf("%s", buf);
+ pos += strlen(buf);
+ first = 0;
+ }
+ }
+ printf("\n");
+
+ if (interactive)
+ printf("1) Copy original to backup\n"
+ "2) Copy backup to original\n" "3) No action\n");
+ else
+ printf(" Not automatically fixing this.\n");
+ switch (interactive ? get_key("123", "?") : '3') {
+ case '1':
+ fs_write(fs->backupboot_start, sizeof(*b), b);
+ break;
+ case '2':
+ fs_write(0, sizeof(b2), &b2);
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+static void init_fsinfo(struct info_sector *i)
+{
+ i->magic = CT_LE_L(0x41615252);
+ i->signature = CT_LE_L(0x61417272);
+ i->free_clusters = CT_LE_L(-1);
+ i->next_cluster = CT_LE_L(2);
+ i->boot_sign = CT_LE_W(0xaa55);
+}
+
+static void read_fsinfo(DOS_FS * fs, struct boot_sector *b, int lss)
+{
+ struct info_sector i;
+
+ if (!b->info_sector) {
+ printf("No FSINFO sector\n");
+ if (interactive)
+ printf("1) Create one\n2) Do without FSINFO\n");
+ else
+ printf(" Not automatically creating it.\n");
+ if (interactive && get_key("12", "?") == '1') {
+ /* search for a free reserved sector (not boot sector and not
+ * backup boot sector) */
+ __u32 s;
+ for (s = 1; s < CF_LE_W(b->reserved); ++s)
+ if (s != CF_LE_W(b->backup_boot))
+ break;
+ if (s > 0 && s < CF_LE_W(b->reserved)) {
+ init_fsinfo(&i);
+ fs_write((loff_t) s * lss, sizeof(i), &i);
+ b->info_sector = CT_LE_W(s);
+ fs_write((loff_t) offsetof(struct boot_sector, info_sector),
+ sizeof(b->info_sector), &b->info_sector);
+ if (fs->backupboot_start)
+ fs_write(fs->backupboot_start +
+ offsetof(struct boot_sector, info_sector),
+ sizeof(b->info_sector), &b->info_sector);
+ } else {
+ printf("No free reserved sector found -- "
+ "no space for FSINFO sector!\n");
+ return;
+ }
+ } else
+ return;
+ }
+
+ fs->fsinfo_start = CF_LE_W(b->info_sector) * lss;
+ fs_read(fs->fsinfo_start, sizeof(i), &i);
+
+ if (i.magic != CT_LE_L(0x41615252) ||
+ i.signature != CT_LE_L(0x61417272) || i.boot_sign != CT_LE_W(0xaa55)) {
+ printf("FSINFO sector has bad magic number(s):\n");
+ if (i.magic != CT_LE_L(0x41615252))
+ printf(" Offset %llu: 0x%08x != expected 0x%08x\n",
+ (unsigned long long)offsetof(struct info_sector, magic),
+ CF_LE_L(i.magic), 0x41615252);
+ if (i.signature != CT_LE_L(0x61417272))
+ printf(" Offset %llu: 0x%08x != expected 0x%08x\n",
+ (unsigned long long)offsetof(struct info_sector, signature),
+ CF_LE_L(i.signature), 0x61417272);
+ if (i.boot_sign != CT_LE_W(0xaa55))
+ printf(" Offset %llu: 0x%04x != expected 0x%04x\n",
+ (unsigned long long)offsetof(struct info_sector, boot_sign),
+ CF_LE_W(i.boot_sign), 0xaa55);
+ if (interactive)
+ printf("1) Correct\n2) Don't correct (FSINFO invalid then)\n");
+ else
+ printf(" Auto-correcting it.\n");
+ if (!interactive || get_key("12", "?") == '1') {
+ init_fsinfo(&i);
+ fs_write(fs->fsinfo_start, sizeof(i), &i);
+ } else
+ fs->fsinfo_start = 0;
+ }
+
+ if (fs->fsinfo_start)
+ fs->free_clusters = CF_LE_L(i.free_clusters);
+}
+
+static char print_fat_dirty_state(void)
+{
+ printf("Dirty bit is set. Fs was not properly unmounted and"
+ " some data may be corrupt.\n");
+
+ if (interactive) {
+ printf("1) Remove dirty bit\n"
+ "2) No action\n");
+ return get_key("12", "?");
+ } else
+ printf(" Automaticaly removing dirty bit.\n");
+ return '1';
+}
+
+static void check_fat_state_bit(DOS_FS *fs, void *b)
+{
+ if (fs->fat_bits == 32) {
+ struct boot_sector *b32 = b;
+
+ if (b32->reserved3 & FAT_STATE_DIRTY) {
+ printf("0x41: ");
+ if (print_fat_dirty_state() == '1') {
+ b32->reserved3 &= ~FAT_STATE_DIRTY;
+ fs_write(0, sizeof(*b32), b32);
+ }
+ }
+ } else {
+ struct boot_sector_16 *b16 = b;
+
+ if (b16->reserved2 & FAT_STATE_DIRTY) {
+ printf("0x25: ");
+ if (print_fat_dirty_state() == '1') {
+ b16->reserved2 &= ~FAT_STATE_DIRTY;
+ fs_write(0, sizeof(*b16), b16);
+ }
+ }
+ }
+}
+
+void read_boot(DOS_FS * fs)
+{
+ struct boot_sector b;
+ unsigned total_sectors;
+ unsigned short logical_sector_size, sectors;
+ unsigned fat_length;
+ loff_t data_size;
+
+ fs_read(0, sizeof(b), &b);
+ logical_sector_size = GET_UNALIGNED_W(b.sector_size);
+ if (!logical_sector_size)
+ die("Logical sector size is zero.");
+
+ /* This was moved up because it's the first thing that will fail */
+ /* if the platform needs special handling of unaligned multibyte accesses */
+ /* but such handling isn't being provided. See GET_UNALIGNED_W() above. */
+ if (logical_sector_size & (SECTOR_SIZE - 1))
+ die("Logical sector size (%d bytes) is not a multiple of the physical "
+ "sector size.", logical_sector_size);
+
+ fs->cluster_size = b.cluster_size * logical_sector_size;
+ if (!fs->cluster_size)
+ die("Cluster size is zero.");
+ if (b.fats != 2 && b.fats != 1)
+ die("Currently, only 1 or 2 FATs are supported, not %d.\n", b.fats);
+ fs->nfats = b.fats;
+ sectors = GET_UNALIGNED_W(b.sectors);
+ total_sectors = sectors ? sectors : CF_LE_L(b.total_sect);
+ if (verbose)
+ printf("Checking we can access the last sector of the filesystem\n");
+ /* Can't access last odd sector anyway, so round down */
+ fs_test((loff_t) ((total_sectors & ~1) - 1) * (loff_t) logical_sector_size,
+ logical_sector_size);
+ fat_length = CF_LE_W(b.fat_length) ?
+ CF_LE_W(b.fat_length) : CF_LE_L(b.fat32_length);
+ fs->fat_start = (loff_t) CF_LE_W(b.reserved) * logical_sector_size;
+ fs->root_start = ((loff_t) CF_LE_W(b.reserved) + b.fats * fat_length) *
+ logical_sector_size;
+ fs->root_entries = GET_UNALIGNED_W(b.dir_entries);
+ fs->data_start = fs->root_start + ROUND_TO_MULTIPLE(fs->root_entries <<
+ MSDOS_DIR_BITS,
+ logical_sector_size);
+ data_size = (loff_t) total_sectors *logical_sector_size - fs->data_start;
+ fs->clusters = data_size / fs->cluster_size;
+ fs->root_cluster = 0; /* indicates standard, pre-FAT32 root dir */
+ fs->fsinfo_start = 0; /* no FSINFO structure */
+ fs->free_clusters = -1; /* unknown */
+ if (!b.fat_length && b.fat32_length) {
+ fs->fat_bits = 32;
+ fs->root_cluster = CF_LE_L(b.root_cluster);
+ if (!fs->root_cluster && fs->root_entries)
+ /* M$ hasn't specified this, but it looks reasonable: If
+ * root_cluster is 0 but there is a separate root dir
+ * (root_entries != 0), we handle the root dir the old way. Give a
+ * warning, but convertig to a root dir in a cluster chain seems
+ * to complex for now... */
+ printf("Warning: FAT32 root dir not in cluster chain! "
+ "Compatibility mode...\n");
+ else if (!fs->root_cluster && !fs->root_entries)
+ die("No root directory!");
+ else if (fs->root_cluster && fs->root_entries)
+ printf("Warning: FAT32 root dir is in a cluster chain, but "
+ "a separate root dir\n"
+ " area is defined. Cannot fix this easily.\n");
+ if (fs->clusters < FAT16_THRESHOLD)
+ printf("Warning: Filesystem is FAT32 according to fat_length "
+ "and fat32_length fields,\n"
+ " but has only %lu clusters, less than the required "
+ "minimum of %d.\n"
+ " This may lead to problems on some systems.\n",
+ fs->clusters, FAT16_THRESHOLD);
+
+ check_fat_state_bit(fs, &b);
+ fs->backupboot_start = CF_LE_W(b.backup_boot) * logical_sector_size;
+ check_backup_boot(fs, &b, logical_sector_size);
+
+ read_fsinfo(fs, &b, logical_sector_size);
+ } else if (!atari_format) {
+ /* On real MS-DOS, a 16 bit FAT is used whenever there would be too
+ * much clusers otherwise. */
+ fs->fat_bits = (fs->clusters >= FAT12_THRESHOLD) ? 16 : 12;
+ if (fs->clusters >= FAT16_THRESHOLD)
+ die("Too many clusters (%lu) for FAT16 filesystem.", fs->clusters);
+ check_fat_state_bit(fs, &b);
+ } else {
+ /* On Atari, things are more difficult: GEMDOS always uses 12bit FATs
+ * on floppies, and always 16 bit on harddisks. */
+ fs->fat_bits = 16; /* assume 16 bit FAT for now */
+ /* If more clusters than fat entries in 16-bit fat, we assume
+ * it's a real MSDOS FS with 12-bit fat. */
+ if (fs->clusters + 2 > fat_length * logical_sector_size * 8 / 16 ||
+ /* if it's a floppy disk --> 12bit fat */
+ device_no == 2 ||
+ /* if it's a ramdisk or loopback device and has one of the usual
+ * floppy sizes -> 12bit FAT */
+ ((device_no == 1 || device_no == 7) &&
+ (total_sectors == 720 || total_sectors == 1440 ||
+ total_sectors == 2880)))
+ fs->fat_bits = 12;
+ }
+ /* On FAT32, the high 4 bits of a FAT entry are reserved */
+ fs->eff_fat_bits = (fs->fat_bits == 32) ? 28 : fs->fat_bits;
+ fs->fat_size = fat_length * logical_sector_size;
+
+ fs->label = calloc(12, sizeof(__u8));
+ if (fs->fat_bits == 12 || fs->fat_bits == 16) {
+ struct boot_sector_16 *b16 = (struct boot_sector_16 *)&b;
+ if (b16->extended_sig == 0x29)
+ memmove(fs->label, b16->label, 11);
+ else
+ fs->label = NULL;
+ } else if (fs->fat_bits == 32) {
+ if (b.extended_sig == 0x29)
+ memmove(fs->label, &b.label, 11);
+ else
+ fs->label = NULL;
+ }
+
+ if (fs->clusters >
+ ((unsigned long long)fs->fat_size * 8 / fs->fat_bits) - 2)
+ die("File system has %d clusters but only space for %d FAT entries.",
+ fs->clusters,
+ ((unsigned long long)fs->fat_size * 8 / fs->fat_bits) - 2);
+ if (!fs->root_entries && !fs->root_cluster)
+ die("Root directory has zero size.");
+ if (fs->root_entries & (MSDOS_DPS - 1))
+ die("Root directory (%d entries) doesn't span an integral number of "
+ "sectors.", fs->root_entries);
+ if (logical_sector_size & (SECTOR_SIZE - 1))
+ die("Logical sector size (%d bytes) is not a multiple of the physical "
+ "sector size.", logical_sector_size);
+#if 0 /* linux kernel doesn't check that either */
+ /* ++roman: On Atari, these two fields are often left uninitialized */
+ if (!atari_format && (!b.secs_track || !b.heads))
+ die("Invalid disk format in boot sector.");
+#endif
+ if (verbose)
+ dump_boot(fs, &b, logical_sector_size);
+}
+
+static void write_boot_label(DOS_FS * fs, char *label)
+{
+ struct boot_sector b;
+ struct boot_sector_16 *b16 = (struct boot_sector_16 *)&b;
+
+ fs_read(0, sizeof(b), &b);
+ if (fs->fat_bits == 12 || fs->fat_bits == 16) {
+ if (b16->extended_sig != 0x29) {
+ b16->extended_sig = 0x29;
+ b16->serial = 0;
+ memmove(b16->fs_type, fs->fat_bits == 12 ? "FAT12 " : "FAT16 ",
+ 8);
+ }
+ memmove(b16->label, label, 11);
+ } else if (fs->fat_bits == 32) {
+ if (b.extended_sig != 0x29) {
+ b.extended_sig = 0x29;
+ b.serial = 0;
+ memmove(b.fs_type, "FAT32 ", 8);
+ }
+ memmove(b.label, label, 11);
+ }
+ fs_write(0, sizeof(b), &b);
+ if (fs->fat_bits == 32 && fs->backupboot_start)
+ fs_write(fs->backupboot_start, sizeof(b), &b);
+}
+
+loff_t find_volume_de(DOS_FS * fs, DIR_ENT * de)
+{
+ unsigned long cluster;
+ loff_t offset;
+ int i;
+
+ if (fs->root_cluster) {
+ for (cluster = fs->root_cluster;
+ cluster != 0 && cluster != -1;
+ cluster = next_cluster(fs, cluster)) {
+ offset = cluster_start(fs, cluster);
+ for (i = 0; i * sizeof(DIR_ENT) < fs->cluster_size; i++) {
+ fs_read(offset, sizeof(DIR_ENT), de);
+ if (de->attr & ATTR_VOLUME)
+ return offset;
+ offset += sizeof(DIR_ENT);
+ }
+ }
+ } else {
+ for (i = 0; i < fs->root_entries; i++) {
+ offset = fs->root_start + i * sizeof(DIR_ENT);
+ fs_read(offset, sizeof(DIR_ENT), de);
+ if (de->attr & ATTR_VOLUME)
+ return offset;
+ }
+ }
+
+ return 0;
+}
+
+static void write_volume_label(DOS_FS * fs, char *label)
+{
+ time_t now = time(NULL);
+ struct tm *mtime = localtime(&now);
+ loff_t offset;
+ int created;
+ DIR_ENT de;
+
+ created = 0;
+ offset = find_volume_de(fs, &de);
+ if (offset == 0)
+ {
+ created = 1;
+ offset = alloc_rootdir_entry(fs, &de, label);
+ }
+ memcpy(de.name, label, 11);
+ de.time = CT_LE_W((unsigned short)((mtime->tm_sec >> 1) +
+ (mtime->tm_min << 5) +
+ (mtime->tm_hour << 11)));
+ de.date = CT_LE_W((unsigned short)(mtime->tm_mday +
+ ((mtime->tm_mon + 1) << 5) +
+ ((mtime->tm_year - 80) << 9)));
+ if (created)
+ {
+ de.attr = ATTR_VOLUME;
+ de.ctime_ms = 0;
+ de.ctime = de.time;
+ de.cdate = de.date;
+ de.adate = de.date;
+ de.starthi = CT_LE_W(0);
+ de.start = CT_LE_W(0);
+ de.size = CT_LE_L(0);
+ }
+
+ fs_write(offset, sizeof(DIR_ENT), &de);
+}
+
+void write_label(DOS_FS * fs, char *label)
+{
+ int l = strlen(label);
+
+ while (l < 11)
+ label[l++] = ' ';
+
+ write_boot_label(fs, label);
+ write_volume_label(fs, label);
+}
diff --git a/src/boot.h b/src/boot.h
new file mode 100644
index 0000000..6e2d6c2
--- /dev/null
+++ b/src/boot.h
@@ -0,0 +1,32 @@
+/* boot.h - Read and analyze ia PC/MS-DOS boot sector
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#ifndef _BOOT_H
+#define _BOOT_H
+
+void read_boot(DOS_FS * fs);
+void write_label(DOS_FS * fs, char *label);
+loff_t find_volume_de(DOS_FS *fs, DIR_ENT *de);
+
+/* Reads the boot sector from the currently open device and initializes *FS */
+
+#endif
diff --git a/src/charconv.c b/src/charconv.c
new file mode 100644
index 0000000..e869e41
--- /dev/null
+++ b/src/charconv.c
@@ -0,0 +1,59 @@
+#include "charconv.h"
+#include <iconv.h>
+#include <langinfo.h>
+#include <locale.h>
+#include <stdio.h>
+
+static iconv_t iconv_init_codepage(int codepage)
+{
+ iconv_t result;
+ char codepage_name[16];
+ snprintf(codepage_name, sizeof(codepage_name), "CP%d", codepage);
+ result = iconv_open(nl_langinfo(CODESET), codepage_name);
+ if (result == (iconv_t) - 1)
+ perror(codepage_name);
+ return result;
+}
+
+static iconv_t dos_to_local;
+
+/*
+ * Initialize conversion from codepage.
+ * codepage = -1 means default codepage.
+ * Returns 0 on success, non-zero on failure
+ */
+static int init_conversion(int codepage)
+{
+ static int initialized = -1;
+ if (initialized < 0) {
+ initialized = 1;
+ if (codepage < 0)
+ codepage = DEFAULT_DOS_CODEPAGE;
+ setlocale(LC_ALL, ""); /* initialize locale */
+ dos_to_local = iconv_init_codepage(codepage);
+ if (dos_to_local == (iconv_t) - 1 && codepage != DEFAULT_DOS_CODEPAGE) {
+ printf("Trying to set fallback DOS codepage %d\n",
+ DEFAULT_DOS_CODEPAGE);
+ dos_to_local = iconv_init_codepage(DEFAULT_DOS_CODEPAGE);
+ if (dos_to_local == (iconv_t) - 1)
+ initialized = 0; /* no conversion available */
+ }
+ }
+ return initialized;
+}
+
+int set_dos_codepage(int codepage)
+{
+ return init_conversion(codepage);
+}
+
+int dos_char_to_printable(char **p, unsigned char c)
+{
+ char in[1] = { c };
+ char *pin = in;
+ size_t bytes_in = 1;
+ size_t bytes_out = 4;
+ if (!init_conversion(-1))
+ return 0;
+ return iconv(dos_to_local, &pin, &bytes_in, p, &bytes_out) != -1;
+}
diff --git a/src/charconv.h b/src/charconv.h
new file mode 100644
index 0000000..3ac3e56
--- /dev/null
+++ b/src/charconv.h
@@ -0,0 +1,9 @@
+#ifndef _CHARCONV_H
+#define _CHARCONV_H
+
+#define DEFAULT_DOS_CODEPAGE 437
+
+int set_dos_codepage(int codepage);
+int dos_char_to_printable(char **p, unsigned char c);
+
+#endif
diff --git a/src/check.c b/src/check.c
new file mode 100644
index 0000000..1ae91c6
--- /dev/null
+++ b/src/check.c
@@ -0,0 +1,1055 @@
+/* check.c - Check and repair a PC/MS-DOS file system
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <time.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "io.h"
+#include "fat.h"
+#include "file.h"
+#include "lfn.h"
+#include "check.h"
+
+static DOS_FILE *root;
+
+/* get start field of a dir entry */
+#define FSTART(p,fs) \
+ ((unsigned long)CF_LE_W(p->dir_ent.start) | \
+ (fs->fat_bits == 32 ? CF_LE_W(p->dir_ent.starthi) << 16 : 0))
+
+#define MODIFY(p,i,v) \
+ do { \
+ if (p->offset) { \
+ p->dir_ent.i = v; \
+ fs_write(p->offset+offsetof(DIR_ENT,i), \
+ sizeof(p->dir_ent.i),&p->dir_ent.i); \
+ } \
+ } while(0)
+
+#define MODIFY_START(p,v,fs) \
+ do { \
+ unsigned long __v = (v); \
+ if (!p->offset) { \
+ /* writing to fake entry for FAT32 root dir */ \
+ if (!__v) die("Oops, deleting FAT32 root dir!"); \
+ fs->root_cluster = __v; \
+ p->dir_ent.start = CT_LE_W(__v&0xffff); \
+ p->dir_ent.starthi = CT_LE_W(__v>>16); \
+ __v = CT_LE_L(__v); \
+ fs_write((loff_t)offsetof(struct boot_sector,root_cluster), \
+ sizeof(((struct boot_sector *)0)->root_cluster), \
+ &__v); \
+ } \
+ else { \
+ MODIFY(p,start,CT_LE_W((__v)&0xffff)); \
+ if (fs->fat_bits == 32) \
+ MODIFY(p,starthi,CT_LE_W((__v)>>16)); \
+ } \
+ } while(0)
+
+loff_t alloc_rootdir_entry(DOS_FS * fs, DIR_ENT * de, const char *pattern)
+{
+ static int curr_num = 0;
+ loff_t offset;
+
+ if (fs->root_cluster) {
+ DIR_ENT d2;
+ int i = 0, got = 0;
+ unsigned long clu_num, prev = 0;
+ loff_t offset2;
+
+ clu_num = fs->root_cluster;
+ offset = cluster_start(fs, clu_num);
+ while (clu_num > 0 && clu_num != -1) {
+ fs_read(offset, sizeof(DIR_ENT), &d2);
+ if (IS_FREE(d2.name) && d2.attr != VFAT_LN_ATTR) {
+ got = 1;
+ break;
+ }
+ i += sizeof(DIR_ENT);
+ offset += sizeof(DIR_ENT);
+ if ((i % fs->cluster_size) == 0) {
+ prev = clu_num;
+ if ((clu_num = next_cluster(fs, clu_num)) == 0 || clu_num == -1)
+ break;
+ offset = cluster_start(fs, clu_num);
+ }
+ }
+ if (!got) {
+ /* no free slot, need to extend root dir: alloc next free cluster
+ * after previous one */
+ if (!prev)
+ die("Root directory has no cluster allocated!");
+ for (clu_num = prev + 1; clu_num != prev; clu_num++) {
+ FAT_ENTRY entry;
+
+ if (clu_num >= fs->clusters + 2)
+ clu_num = 2;
+ get_fat(&entry, fs->fat, clu_num, fs);
+ if (!entry.value)
+ break;
+ }
+ if (clu_num == prev)
+ die("Root directory full and no free cluster");
+ set_fat(fs, prev, clu_num);
+ set_fat(fs, clu_num, -1);
+ set_owner(fs, clu_num, get_owner(fs, fs->root_cluster));
+ /* clear new cluster */
+ memset(&d2, 0, sizeof(d2));
+ offset = cluster_start(fs, clu_num);
+ for (i = 0; i < fs->cluster_size; i += sizeof(DIR_ENT))
+ fs_write(offset + i, sizeof(d2), &d2);
+ }
+ memset(de, 0, sizeof(DIR_ENT));
+ while (1) {
+ char expanded[12];
+ sprintf(expanded, pattern, curr_num);
+ memcpy(de->name, expanded, 8);
+ memcpy(de->ext, expanded + 8, 3);
+ clu_num = fs->root_cluster;
+ i = 0;
+ offset2 = cluster_start(fs, clu_num);
+ while (clu_num > 0 && clu_num != -1) {
+ fs_read(offset2, sizeof(DIR_ENT), &d2);
+ if (offset2 != offset &&
+ !strncmp((const char *)d2.name, (const char *)de->name,
+ MSDOS_NAME))
+ break;
+ i += sizeof(DIR_ENT);
+ offset2 += sizeof(DIR_ENT);
+ if ((i % fs->cluster_size) == 0) {
+ if ((clu_num = next_cluster(fs, clu_num)) == 0 ||
+ clu_num == -1)
+ break;
+ offset2 = cluster_start(fs, clu_num);
+ }
+ }
+ if (clu_num == 0 || clu_num == -1)
+ break;
+ if (++curr_num >= 10000)
+ die("Unable to create unique name");
+ }
+ } else {
+ DIR_ENT *root;
+ int next_free = 0, scan;
+
+ root = alloc(fs->root_entries * sizeof(DIR_ENT));
+ fs_read(fs->root_start, fs->root_entries * sizeof(DIR_ENT), root);
+
+ while (next_free < fs->root_entries)
+ if (IS_FREE(root[next_free].name) &&
+ root[next_free].attr != VFAT_LN_ATTR)
+ break;
+ else
+ next_free++;
+ if (next_free == fs->root_entries)
+ die("Root directory is full.");
+ offset = fs->root_start + next_free * sizeof(DIR_ENT);
+ memset(de, 0, sizeof(DIR_ENT));
+ while (1) {
+ char expanded[12];
+ sprintf(expanded, pattern, curr_num);
+ memcpy(de->name, expanded, 8);
+ memcpy(de->ext, expanded + 8, 3);
+ for (scan = 0; scan < fs->root_entries; scan++)
+ if (scan != next_free &&
+ !strncmp((const char *)root[scan].name,
+ (const char *)de->name, MSDOS_NAME))
+ break;
+ if (scan == fs->root_entries)
+ break;
+ if (++curr_num >= 10000)
+ die("Unable to create unique name");
+ }
+ free(root);
+ }
+ ++n_files;
+ return offset;
+}
+
+/**
+ * Construct a full path (starting with '/') for the specified dentry,
+ * relative to the partition. All components are "long" names where possible.
+ *
+ * @param[in] file Information about dentry (file or directory) of interest
+ *
+ * return Pointer to static string containing file's full path
+ */
+static char *path_name(DOS_FILE * file)
+{
+ static char path[PATH_MAX * 2];
+
+ if (!file)
+ *path = 0; /* Reached the root directory */
+ else {
+ if (strlen(path_name(file->parent)) > PATH_MAX)
+ die("Path name too long.");
+ if (strcmp(path, "/") != 0)
+ strcat(path, "/");
+
+ /* Append the long name to the path,
+ * or the short name if there isn't a long one
+ */
+ strcpy(strrchr(path, 0),
+ file->lfn ? file->lfn : file_name(file->dir_ent.name));
+ }
+ return path;
+}
+
+static int day_n[] =
+ { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 0, 0, 0, 0 };
+ /* JanFebMarApr May Jun Jul Aug Sep Oct Nov Dec */
+
+/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
+
+time_t date_dos2unix(unsigned short time, unsigned short date)
+{
+ int month, year;
+ time_t secs;
+
+ month = ((date >> 5) & 15) - 1;
+ year = date >> 9;
+ secs =
+ (time & 31) * 2 + 60 * ((time >> 5) & 63) + (time >> 11) * 3600 +
+ 86400 * ((date & 31) - 1 + day_n[month] + (year / 4) + year * 365 -
+ ((year & 3) == 0 && month < 2 ? 1 : 0) + 3653);
+ /* days since 1.1.70 plus 80's leap day */
+ return secs;
+}
+
+static char *file_stat(DOS_FILE * file)
+{
+ static char temp[100];
+ struct tm *tm;
+ char tmp[100];
+ time_t date;
+
+ date =
+ date_dos2unix(CF_LE_W(file->dir_ent.time), CF_LE_W(file->dir_ent.date));
+ tm = localtime(&date);
+ strftime(tmp, 99, "%H:%M:%S %b %d %Y", tm);
+ sprintf(temp, " Size %u bytes, date %s", CF_LE_L(file->dir_ent.size), tmp);
+ return temp;
+}
+
+static int bad_name(DOS_FILE * file)
+{
+ int i, spc, suspicious = 0;
+ char *bad_chars = atari_format ? "*?\\/:" : "*?<>|\"\\/:";
+ unsigned char *name = file->dir_ent.name;
+
+ /* Do not complain about (and auto-correct) the extended attribute files
+ * of OS/2. */
+ if (strncmp((const char *)name, "EA DATA SF", 11) == 0 ||
+ strncmp((const char *)name, "WP ROOT SF", 11) == 0)
+ return 0;
+
+ /* don't complain about the dummy 11 bytes used by patched Linux
+ kernels */
+ if (file->dir_ent.lcase & FAT_NO_83NAME)
+ return 0;
+
+ for (i = 0; i < 8; i++) {
+ if (name[i] < ' ' || name[i] == 0x7f)
+ return 1;
+ if (name[i] > 0x7f)
+ ++suspicious;
+ if (strchr(bad_chars, name[i]))
+ return 1;
+ }
+
+ for (i = 8; i < 11; i++) {
+ if (name[i] < ' ' || name[i] == 0x7f)
+ return 1;
+ if (name[i] > 0x7f)
+ ++suspicious;
+ if (strchr(bad_chars, name[i]))
+ return 1;
+ }
+
+ spc = 0;
+ for (i = 0; i < 8; i++) {
+ if (name[i] == ' ')
+ spc = 1;
+ else if (spc)
+ /* non-space after a space not allowed, space terminates the name
+ * part */
+ return 1;
+ }
+
+ spc = 0;
+ for (i = 8; i < 11; i++) {
+ if (name[i] == ' ')
+ spc = 1;
+ else if (spc)
+ /* non-space after a space not allowed, space terminates the name
+ * part */
+ return 1;
+ }
+
+ /* Under GEMDOS, chars >= 128 are never allowed. */
+ if (atari_format && suspicious)
+ return 1;
+
+ /* Under MS-DOS and Windows, chars >= 128 in short names are valid
+ * (but these characters can be visualised differently depending on
+ * local codepage: CP437, CP866, etc). The chars are all basically ok,
+ * so we shouldn't auto-correct such names. */
+ return 0;
+}
+
+static void lfn_remove(loff_t from, loff_t to)
+{
+ DIR_ENT empty;
+
+ /* New dir entry is zeroed except first byte, which is set to 0xe5.
+ * This is to avoid that some FAT-reading OSes (not Linux! ;) stop reading
+ * a directory at the first zero entry...
+ */
+ memset(&empty, 0, sizeof(empty));
+ empty.name[0] = DELETED_FLAG;
+
+ for (; from < to; from += sizeof(empty)) {
+ fs_write(from, sizeof(DIR_ENT), &empty);
+ }
+}
+
+static void drop_file(DOS_FS * fs, DOS_FILE * file)
+{
+ unsigned long cluster;
+
+ MODIFY(file, name[0], DELETED_FLAG);
+ if (file->lfn)
+ lfn_remove(file->lfn_offset, file->offset);
+ for (cluster = FSTART(file, fs); cluster > 0 && cluster <
+ fs->clusters + 2; cluster = next_cluster(fs, cluster))
+ set_owner(fs, cluster, NULL);
+ --n_files;
+}
+
+static void truncate_file(DOS_FS * fs, DOS_FILE * file, unsigned long clusters)
+{
+ int deleting;
+ unsigned long walk, next, prev;
+
+ walk = FSTART(file, fs);
+ prev = 0;
+ if ((deleting = !clusters))
+ MODIFY_START(file, 0, fs);
+ while (walk > 0 && walk != -1) {
+ next = next_cluster(fs, walk);
+ if (deleting)
+ set_fat(fs, walk, 0);
+ else if ((deleting = !--clusters))
+ set_fat(fs, walk, -1);
+ prev = walk;
+ walk = next;
+ }
+}
+
+static void auto_rename(DOS_FILE * file)
+{
+ DOS_FILE *first, *walk;
+ unsigned long int number;
+
+ if (!file->offset)
+ return; /* cannot rename FAT32 root dir */
+ first = file->parent ? file->parent->first : root;
+ number = 0;
+ while (1) {
+ char num[8];
+ sprintf(num, "%07lu", number);
+ memcpy(file->dir_ent.name, "FSCK", 4);
+ memcpy(file->dir_ent.name + 4, num, 4);
+ memcpy(file->dir_ent.ext, num + 4, 3);
+ for (walk = first; walk; walk = walk->next)
+ if (walk != file
+ && !strncmp((const char *)walk->dir_ent.name,
+ (const char *)file->dir_ent.name, MSDOS_NAME))
+ break;
+ if (!walk) {
+ fs_write(file->offset, MSDOS_NAME, file->dir_ent.name);
+ if (file->lfn)
+ lfn_fix_checksum(file->lfn_offset, file->offset,
+ (const char *)file->dir_ent.name);
+ return;
+ }
+ number++;
+ if (number > 9999999) {
+ die("Too many files need repair.");
+ }
+ }
+ die("Can't generate a unique name.");
+}
+
+static void rename_file(DOS_FILE * file)
+{
+ unsigned char name[46];
+ unsigned char *walk, *here;
+
+ if (!file->offset) {
+ printf("Cannot rename FAT32 root dir\n");
+ return; /* cannot rename FAT32 root dir */
+ }
+ while (1) {
+ printf("New name: ");
+ fflush(stdout);
+ if (fgets((char *)name, 45, stdin)) {
+ if ((here = (unsigned char *)strchr((const char *)name, '\n')))
+ *here = 0;
+ for (walk = (unsigned char *)strrchr((const char *)name, 0);
+ walk >= name && (*walk == ' ' || *walk == '\t'); walk--) ;
+ walk[1] = 0;
+ for (walk = name; *walk == ' ' || *walk == '\t'; walk++) ;
+ if (file_cvt(walk, file->dir_ent.name)) {
+ fs_write(file->offset, MSDOS_NAME, file->dir_ent.name);
+ if (file->lfn)
+ lfn_fix_checksum(file->lfn_offset, file->offset,
+ (const char *)file->dir_ent.name);
+ return;
+ }
+ }
+ }
+}
+
+static int handle_dot(DOS_FS * fs, DOS_FILE * file, int dots)
+{
+ char *name;
+
+ name =
+ strncmp((const char *)file->dir_ent.name, MSDOS_DOT,
+ MSDOS_NAME) ? ".." : ".";
+ if (!(file->dir_ent.attr & ATTR_DIR)) {
+ printf("%s\n Is a non-directory.\n", path_name(file));
+ if (interactive)
+ printf("1) Drop it\n2) Auto-rename\n3) Rename\n"
+ "4) Convert to directory\n");
+ else
+ printf(" Auto-renaming it.\n");
+ switch (interactive ? get_key("1234", "?") : '2') {
+ case '1':
+ drop_file(fs, file);
+ return 1;
+ case '2':
+ auto_rename(file);
+ printf(" Renamed to %s\n", file_name(file->dir_ent.name));
+ return 0;
+ case '3':
+ rename_file(file);
+ return 0;
+ case '4':
+ MODIFY(file, size, CT_LE_L(0));
+ MODIFY(file, attr, file->dir_ent.attr | ATTR_DIR);
+ break;
+ }
+ }
+ if (!dots) {
+ printf("Root contains directory \"%s\". Dropping it.\n", name);
+ drop_file(fs, file);
+ return 1;
+ }
+ return 0;
+}
+
+static int check_file(DOS_FS * fs, DOS_FILE * file)
+{
+ DOS_FILE *owner;
+ int restart;
+ unsigned long expect, curr, this, clusters, prev, walk, clusters2;
+
+ if (file->dir_ent.attr & ATTR_DIR) {
+ if (CF_LE_L(file->dir_ent.size)) {
+ printf("%s\n Directory has non-zero size. Fixing it.\n",
+ path_name(file));
+ MODIFY(file, size, CT_LE_L(0));
+ }
+ if (file->parent
+ && !strncmp((const char *)file->dir_ent.name, MSDOS_DOT,
+ MSDOS_NAME)) {
+ expect = FSTART(file->parent, fs);
+ if (FSTART(file, fs) != expect) {
+ printf("%s\n Start (%ld) does not point to parent (%ld)\n",
+ path_name(file), FSTART(file, fs), expect);
+ MODIFY_START(file, expect, fs);
+ }
+ return 0;
+ }
+ if (file->parent
+ && !strncmp((const char *)file->dir_ent.name, MSDOS_DOTDOT,
+ MSDOS_NAME)) {
+ expect =
+ file->parent->parent ? FSTART(file->parent->parent, fs) : 0;
+ if (fs->root_cluster && expect == fs->root_cluster)
+ expect = 0;
+ if (FSTART(file, fs) != expect) {
+ printf("%s\n Start (%lu) does not point to .. (%lu)\n",
+ path_name(file), FSTART(file, fs), expect);
+ MODIFY_START(file, expect, fs);
+ }
+ return 0;
+ }
+ if (FSTART(file, fs) == 0) {
+ printf("%s\n Start does point to root directory. Deleting dir. \n",
+ path_name(file));
+ MODIFY(file, name[0], DELETED_FLAG);
+ return 0;
+ }
+ }
+ if (FSTART(file, fs) >= fs->clusters + 2) {
+ printf
+ ("%s\n Start cluster beyond limit (%lu > %lu). Truncating file.\n",
+ path_name(file), FSTART(file, fs), fs->clusters + 1);
+ if (!file->offset)
+ die("Bad FAT32 root directory! (bad start cluster)\n");
+ MODIFY_START(file, 0, fs);
+ }
+ clusters = prev = 0;
+ for (curr = FSTART(file, fs) ? FSTART(file, fs) :
+ -1; curr != -1; curr = next_cluster(fs, curr)) {
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, curr, fs);
+
+ if (!curEntry.value || bad_cluster(fs, curr)) {
+ printf("%s\n Contains a %s cluster (%lu). Assuming EOF.\n",
+ path_name(file), curEntry.value ? "bad" : "free", curr);
+ if (prev)
+ set_fat(fs, prev, -1);
+ else if (!file->offset)
+ die("FAT32 root dir starts with a bad cluster!");
+ else
+ MODIFY_START(file, 0, fs);
+ break;
+ }
+ if (!(file->dir_ent.attr & ATTR_DIR) && CF_LE_L(file->dir_ent.size) <=
+ (unsigned long long)clusters * fs->cluster_size) {
+ printf
+ ("%s\n File size is %u bytes, cluster chain length is > %llu "
+ "bytes.\n Truncating file to %u bytes.\n", path_name(file),
+ CF_LE_L(file->dir_ent.size),
+ (unsigned long long)clusters * fs->cluster_size,
+ CF_LE_L(file->dir_ent.size));
+ truncate_file(fs, file, clusters);
+ break;
+ }
+ if ((owner = get_owner(fs, curr))) {
+ int do_trunc = 0;
+ printf("%s and\n", path_name(owner));
+ printf("%s\n share clusters.\n", path_name(file));
+ clusters2 = 0;
+ for (walk = FSTART(owner, fs); walk > 0 && walk != -1; walk =
+ next_cluster(fs, walk))
+ if (walk == curr)
+ break;
+ else
+ clusters2++;
+ restart = file->dir_ent.attr & ATTR_DIR;
+ if (!owner->offset) {
+ printf(" Truncating second to %llu bytes because first "
+ "is FAT32 root dir.\n",
+ (unsigned long long)clusters2 * fs->cluster_size);
+ do_trunc = 2;
+ } else if (!file->offset) {
+ printf(" Truncating first to %llu bytes because second "
+ "is FAT32 root dir.\n",
+ (unsigned long long)clusters * fs->cluster_size);
+ do_trunc = 1;
+ } else if (interactive)
+ printf("1) Truncate first to %llu bytes%s\n"
+ "2) Truncate second to %llu bytes\n",
+ (unsigned long long)clusters * fs->cluster_size,
+ restart ? " and restart" : "",
+ (unsigned long long)clusters2 * fs->cluster_size);
+ else
+ printf(" Truncating second to %llu bytes.\n",
+ (unsigned long long)clusters2 * fs->cluster_size);
+ if (do_trunc != 2
+ && (do_trunc == 1
+ || (interactive && get_key("12", "?") == '1'))) {
+ prev = 0;
+ clusters = 0;
+ for (this = FSTART(owner, fs); this > 0 && this != -1; this =
+ next_cluster(fs, this)) {
+ if (this == curr) {
+ if (prev)
+ set_fat(fs, prev, -1);
+ else
+ MODIFY_START(owner, 0, fs);
+ MODIFY(owner, size,
+ CT_LE_L((unsigned long long)clusters *
+ fs->cluster_size));
+ if (restart)
+ return 1;
+ while (this > 0 && this != -1) {
+ set_owner(fs, this, NULL);
+ this = next_cluster(fs, this);
+ }
+ this = curr;
+ break;
+ }
+ clusters++;
+ prev = this;
+ }
+ if (this != curr)
+ die("Internal error: didn't find cluster %d in chain"
+ " starting at %d", curr, FSTART(owner, fs));
+ } else {
+ if (prev)
+ set_fat(fs, prev, -1);
+ else
+ MODIFY_START(file, 0, fs);
+ break;
+ }
+ }
+ set_owner(fs, curr, file);
+ clusters++;
+ prev = curr;
+ }
+ if (!(file->dir_ent.attr & ATTR_DIR) && CF_LE_L(file->dir_ent.size) >
+ (unsigned long long)clusters * fs->cluster_size) {
+ printf
+ ("%s\n File size is %u bytes, cluster chain length is %llu bytes."
+ "\n Truncating file to %llu bytes.\n", path_name(file),
+ CF_LE_L(file->dir_ent.size),
+ (unsigned long long)clusters * fs->cluster_size,
+ (unsigned long long)clusters * fs->cluster_size);
+ MODIFY(file, size,
+ CT_LE_L((unsigned long long)clusters * fs->cluster_size));
+ }
+ return 0;
+}
+
+static int check_files(DOS_FS * fs, DOS_FILE * start)
+{
+ while (start) {
+ if (check_file(fs, start))
+ return 1;
+ start = start->next;
+ }
+ return 0;
+}
+
+static int check_dir(DOS_FS * fs, DOS_FILE ** root, int dots)
+{
+ DOS_FILE *parent, **walk, **scan;
+ int dot, dotdot, skip, redo;
+ int good, bad;
+
+ if (!*root)
+ return 0;
+ parent = (*root)->parent;
+ good = bad = 0;
+ for (walk = root; *walk; walk = &(*walk)->next)
+ if (bad_name(*walk))
+ bad++;
+ else
+ good++;
+ if (*root && parent && good + bad > 4 && bad > good / 2) {
+ printf("%s\n Has a large number of bad entries. (%d/%d)\n",
+ path_name(parent), bad, good + bad);
+ if (!dots)
+ printf(" Not dropping root directory.\n");
+ else if (!interactive)
+ printf(" Not dropping it in auto-mode.\n");
+ else if (get_key("yn", "Drop directory ? (y/n)") == 'y') {
+ truncate_file(fs, parent, 0);
+ MODIFY(parent, name[0], DELETED_FLAG);
+ /* buglet: deleted directory stays in the list. */
+ return 1;
+ }
+ }
+ dot = dotdot = redo = 0;
+ walk = root;
+ while (*walk) {
+ if (!strncmp
+ ((const char *)((*walk)->dir_ent.name), MSDOS_DOT, MSDOS_NAME)
+ || !strncmp((const char *)((*walk)->dir_ent.name), MSDOS_DOTDOT,
+ MSDOS_NAME)) {
+ if (handle_dot(fs, *walk, dots)) {
+ *walk = (*walk)->next;
+ continue;
+ }
+ if (!strncmp
+ ((const char *)((*walk)->dir_ent.name), MSDOS_DOT, MSDOS_NAME))
+ dot++;
+ else
+ dotdot++;
+ }
+ if (!((*walk)->dir_ent.attr & ATTR_VOLUME) && bad_name(*walk)) {
+ puts(path_name(*walk));
+ printf(" Bad short file name (%s).\n",
+ file_name((*walk)->dir_ent.name));
+ if (interactive)
+ printf("1) Drop file\n2) Rename file\n3) Auto-rename\n"
+ "4) Keep it\n");
+ else
+ printf(" Auto-renaming it.\n");
+ switch (interactive ? get_key("1234", "?") : '3') {
+ case '1':
+ drop_file(fs, *walk);
+ walk = &(*walk)->next;
+ continue;
+ case '2':
+ rename_file(*walk);
+ redo = 1;
+ break;
+ case '3':
+ auto_rename(*walk);
+ printf(" Renamed to %s\n", file_name((*walk)->dir_ent.name));
+ break;
+ case '4':
+ break;
+ }
+ }
+ /* don't check for duplicates of the volume label */
+ if (!((*walk)->dir_ent.attr & ATTR_VOLUME)) {
+ scan = &(*walk)->next;
+ skip = 0;
+ while (*scan && !skip) {
+ if (!((*scan)->dir_ent.attr & ATTR_VOLUME) &&
+ !memcmp((*walk)->dir_ent.name, (*scan)->dir_ent.name,
+ MSDOS_NAME)) {
+ printf("%s\n Duplicate directory entry.\n First %s\n",
+ path_name(*walk), file_stat(*walk));
+ printf(" Second %s\n", file_stat(*scan));
+ if (interactive)
+ printf
+ ("1) Drop first\n2) Drop second\n3) Rename first\n"
+ "4) Rename second\n5) Auto-rename first\n"
+ "6) Auto-rename second\n");
+ else
+ printf(" Auto-renaming second.\n");
+ switch (interactive ? get_key("123456", "?") : '6') {
+ case '1':
+ drop_file(fs, *walk);
+ *walk = (*walk)->next;
+ skip = 1;
+ break;
+ case '2':
+ drop_file(fs, *scan);
+ *scan = (*scan)->next;
+ continue;
+ case '3':
+ rename_file(*walk);
+ printf(" Renamed to %s\n", path_name(*walk));
+ redo = 1;
+ break;
+ case '4':
+ rename_file(*scan);
+ printf(" Renamed to %s\n", path_name(*walk));
+ redo = 1;
+ break;
+ case '5':
+ auto_rename(*walk);
+ printf(" Renamed to %s\n",
+ file_name((*walk)->dir_ent.name));
+ break;
+ case '6':
+ auto_rename(*scan);
+ printf(" Renamed to %s\n",
+ file_name((*scan)->dir_ent.name));
+ break;
+ }
+ }
+ scan = &(*scan)->next;
+ }
+ if (skip)
+ continue;
+ }
+ if (!redo)
+ walk = &(*walk)->next;
+ else {
+ walk = root;
+ dot = dotdot = redo = 0;
+ }
+ }
+ if (dots && !dot)
+ printf("%s\n \".\" is missing. Can't fix this yet.\n",
+ path_name(parent));
+ if (dots && !dotdot)
+ printf("%s\n \"..\" is missing. Can't fix this yet.\n",
+ path_name(parent));
+ return 0;
+}
+
+/**
+ * Check a dentry's cluster chain for bad clusters.
+ * If requested, we verify readability and mark unreadable clusters as bad.
+ *
+ * @param[inout] fs Information about the filesystem
+ * @param[in] file dentry to check
+ * @param[in] read_test Nonzero == verify that dentry's clusters can
+ * be read
+ */
+static void test_file(DOS_FS * fs, DOS_FILE * file, int read_test)
+{
+ DOS_FILE *owner;
+ unsigned long walk, prev, clusters, next_clu;
+
+ prev = clusters = 0;
+ for (walk = FSTART(file, fs); walk > 0 && walk < fs->clusters + 2;
+ walk = next_clu) {
+ next_clu = next_cluster(fs, walk);
+
+ /* In this stage we are checking only for a loop within our own
+ * cluster chain.
+ * Cross-linking of clusters is handled in check_file()
+ */
+ if ((owner = get_owner(fs, walk))) {
+ if (owner == file) {
+ printf("%s\n Circular cluster chain. Truncating to %lu "
+ "cluster%s.\n", path_name(file), clusters,
+ clusters == 1 ? "" : "s");
+ if (prev)
+ set_fat(fs, prev, -1);
+ else if (!file->offset)
+ die("Bad FAT32 root directory! (bad start cluster)\n");
+ else
+ MODIFY_START(file, 0, fs);
+ }
+ break;
+ }
+ if (bad_cluster(fs, walk))
+ break;
+ if (read_test) {
+ if (fs_test(cluster_start(fs, walk), fs->cluster_size)) {
+ prev = walk;
+ clusters++;
+ } else {
+ printf("%s\n Cluster %lu (%lu) is unreadable. Skipping it.\n",
+ path_name(file), clusters, walk);
+ if (prev)
+ set_fat(fs, prev, next_cluster(fs, walk));
+ else
+ MODIFY_START(file, next_cluster(fs, walk), fs);
+ set_fat(fs, walk, -2);
+ }
+ }
+ set_owner(fs, walk, file);
+ }
+ /* Revert ownership (for now) */
+ for (walk = FSTART(file, fs); walk > 0 && walk < fs->clusters + 2;
+ walk = next_cluster(fs, walk))
+ if (bad_cluster(fs, walk))
+ break;
+ else if (get_owner(fs, walk) == file)
+ set_owner(fs, walk, NULL);
+ else
+ break;
+}
+
+static void undelete(DOS_FS * fs, DOS_FILE * file)
+{
+ unsigned long clusters, left, prev, walk;
+
+ clusters = left = (CF_LE_L(file->dir_ent.size) + fs->cluster_size - 1) /
+ fs->cluster_size;
+ prev = 0;
+
+ walk = FSTART(file, fs);
+
+ while (left && (walk >= 2) && (walk < fs->clusters + 2)) {
+
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, walk, fs);
+
+ if (!curEntry.value)
+ break;
+
+ left--;
+ if (prev)
+ set_fat(fs, prev, walk);
+ prev = walk;
+ walk++;
+ }
+ if (prev)
+ set_fat(fs, prev, -1);
+ else
+ MODIFY_START(file, 0, fs);
+ if (left)
+ printf("Warning: Did only undelete %lu of %lu cluster%s.\n",
+ clusters - left, clusters, clusters == 1 ? "" : "s");
+
+}
+
+static void new_dir(void)
+{
+ lfn_reset();
+}
+
+/**
+ * Create a description for a referenced dentry and insert it in our dentry
+ * tree. Then, go check the dentry's cluster chain for bad clusters and
+ * cluster loops.
+ *
+ * @param[inout] fs Information about the filesystem
+ * @param[out] chain
+ * @param[in] parent Information about parent directory of this file
+ * NULL == no parent ('file' is root directory)
+ * @param[in] offset Partition-relative byte offset of directory entry of interest
+ * 0 == Root directory
+ * @param cp
+ */
+static void add_file(DOS_FS * fs, DOS_FILE *** chain, DOS_FILE * parent,
+ loff_t offset, FDSC ** cp)
+{
+ DOS_FILE *new;
+ DIR_ENT de;
+ FD_TYPE type;
+
+ if (offset)
+ fs_read(offset, sizeof(DIR_ENT), &de);
+ else {
+ /* Construct a DIR_ENT for the root directory */
+ memcpy(de.name, " ", MSDOS_NAME);
+ de.attr = ATTR_DIR;
+ de.size = de.time = de.date = 0;
+ de.start = CT_LE_W(fs->root_cluster & 0xffff);
+ de.starthi = CT_LE_W((fs->root_cluster >> 16) & 0xffff);
+ }
+ if ((type = file_type(cp, (char *)de.name)) != fdt_none) {
+ if (type == fdt_undelete && (de.attr & ATTR_DIR))
+ die("Can't undelete directories.");
+ file_modify(cp, (char *)de.name);
+ fs_write(offset, 1, &de);
+ }
+ if (IS_FREE(de.name)) {
+ lfn_check_orphaned();
+ return;
+ }
+ if (de.attr == VFAT_LN_ATTR) {
+ lfn_add_slot(&de, offset);
+ return;
+ }
+ new = qalloc(&mem_queue, sizeof(DOS_FILE));
+ new->lfn = lfn_get(&de, &new->lfn_offset);
+ new->offset = offset;
+ memcpy(&new->dir_ent, &de, sizeof(de));
+ new->next = new->first = NULL;
+ new->parent = parent;
+ if (type == fdt_undelete)
+ undelete(fs, new);
+ **chain = new;
+ *chain = &new->next;
+ if (list) {
+ printf("Checking file %s", path_name(new));
+ if (new->lfn)
+ printf(" (%s)", file_name(new->dir_ent.name)); /* (8.3) */
+ printf("\n");
+ }
+ /* Don't include root directory, '.', or '..' in the total file count */
+ if (offset &&
+ strncmp((const char *)de.name, MSDOS_DOT, MSDOS_NAME) != 0 &&
+ strncmp((const char *)de.name, MSDOS_DOTDOT, MSDOS_NAME) != 0)
+ ++n_files;
+ test_file(fs, new, test); /* Bad cluster check */
+}
+
+static int subdirs(DOS_FS * fs, DOS_FILE * parent, FDSC ** cp);
+
+static int scan_dir(DOS_FS * fs, DOS_FILE * this, FDSC ** cp)
+{
+ DOS_FILE **chain;
+ int i;
+ unsigned long clu_num;
+
+ chain = &this->first;
+ i = 0;
+ clu_num = FSTART(this, fs);
+ new_dir();
+ while (clu_num > 0 && clu_num != -1) {
+ add_file(fs, &chain, this,
+ cluster_start(fs, clu_num) + (i % fs->cluster_size), cp);
+ i += sizeof(DIR_ENT);
+ if (!(i % fs->cluster_size))
+ if ((clu_num = next_cluster(fs, clu_num)) == 0 || clu_num == -1)
+ break;
+ }
+ lfn_check_orphaned();
+ if (check_dir(fs, &this->first, this->offset))
+ return 0;
+ if (check_files(fs, this->first))
+ return 1;
+ return subdirs(fs, this, cp);
+}
+
+/**
+ * Recursively scan subdirectories of the specified parent directory.
+ *
+ * @param[inout] fs Information about the filesystem
+ * @param[in] parent Identifies the directory to scan
+ * @param[in] cp
+ *
+ * @return 0 Success
+ * @return 1 Error
+ */
+static int subdirs(DOS_FS * fs, DOS_FILE * parent, FDSC ** cp)
+{
+ DOS_FILE *walk;
+
+ for (walk = parent ? parent->first : root; walk; walk = walk->next)
+ if (walk->dir_ent.attr & ATTR_DIR)
+ if (strncmp((const char *)walk->dir_ent.name, MSDOS_DOT, MSDOS_NAME)
+ && strncmp((const char *)walk->dir_ent.name, MSDOS_DOTDOT,
+ MSDOS_NAME))
+ if (scan_dir(fs, walk, file_cd(cp, (char *)walk->dir_ent.name)))
+ return 1;
+ return 0;
+}
+
+/**
+ * Scan all directory and file information for errors.
+ *
+ * @param[inout] fs Information about the filesystem
+ *
+ * @return 0 Success
+ * @return 1 Error
+ */
+int scan_root(DOS_FS * fs)
+{
+ DOS_FILE **chain;
+ int i;
+
+ root = NULL;
+ chain = &root;
+ new_dir();
+ if (fs->root_cluster) {
+ add_file(fs, &chain, NULL, 0, &fp_root);
+ } else {
+ for (i = 0; i < fs->root_entries; i++)
+ add_file(fs, &chain, NULL, fs->root_start + i * sizeof(DIR_ENT),
+ &fp_root);
+ }
+ lfn_check_orphaned();
+ (void)check_dir(fs, &root, 0);
+ if (check_files(fs, root))
+ return 1;
+ return subdirs(fs, NULL, &fp_root);
+}
diff --git a/src/check.h b/src/check.h
new file mode 100644
index 0000000..ae05988
--- /dev/null
+++ b/src/check.h
@@ -0,0 +1,40 @@
+/* check.h - Check and repair a PC/MS-DOS file system
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#ifndef _CHECK_H
+#define _CHECK_H
+
+loff_t alloc_rootdir_entry(DOS_FS * fs, DIR_ENT * de, const char *pattern);
+
+/* Allocate a free slot in the root directory for a new file. The file name is
+ constructed after 'pattern', which must include a %d type format for printf
+ and expand to exactly 11 characters. The name actually used is written into
+ the 'de' structure, the rest of *de is cleared. The offset returned is to
+ where in the filesystem the entry belongs. */
+
+int scan_root(DOS_FS * fs);
+
+/* Scans the root directory and recurses into all subdirectories. See check.c
+ for all the details. Returns a non-zero integer if the file system has to
+ be checked again. */
+
+#endif
diff --git a/src/common.c b/src/common.c
new file mode 100644
index 0000000..09004dd
--- /dev/null
+++ b/src/common.c
@@ -0,0 +1,119 @@
+/* common.c - Common functions
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <errno.h>
+
+#include "common.h"
+
+typedef struct _link {
+ void *data;
+ struct _link *next;
+} LINK;
+
+void die(char *msg, ...)
+{
+ va_list args;
+
+ va_start(args, msg);
+ vfprintf(stderr, msg, args);
+ va_end(args);
+ fprintf(stderr, "\n");
+ exit(1);
+}
+
+void pdie(char *msg, ...)
+{
+ va_list args;
+
+ va_start(args, msg);
+ vfprintf(stderr, msg, args);
+ va_end(args);
+ fprintf(stderr, ":%s\n", strerror(errno));
+ exit(1);
+}
+
+void *alloc(int size)
+{
+ void *this;
+
+ if ((this = malloc(size)))
+ return this;
+ pdie("malloc");
+ return NULL; /* for GCC */
+}
+
+void *qalloc(void **root, int size)
+{
+ LINK *link;
+
+ link = alloc(sizeof(LINK));
+ link->next = *root;
+ *root = link;
+ return link->data = alloc(size);
+}
+
+void qfree(void **root)
+{
+ LINK *this;
+
+ while (*root) {
+ this = (LINK *) * root;
+ *root = this->next;
+ free(this->data);
+ free(this);
+ }
+}
+
+int min(int a, int b)
+{
+ return a < b ? a : b;
+}
+
+char get_key(char *valid, char *prompt)
+{
+ int ch, okay;
+
+ while (1) {
+ if (prompt)
+ printf("%s ", prompt);
+ fflush(stdout);
+ while (ch = getchar(), ch == ' ' || ch == '\t') ;
+ if (ch == EOF)
+ exit(1);
+ if (!strchr(valid, okay = ch))
+ okay = 0;
+ while (ch = getchar(), ch != '\n' && ch != EOF) ;
+ if (ch == EOF)
+ exit(1);
+ if (okay)
+ return okay;
+ printf("Invalid input.\n");
+ }
+}
diff --git a/src/common.h b/src/common.h
new file mode 100644
index 0000000..7e998ff
--- /dev/null
+++ b/src/common.h
@@ -0,0 +1,58 @@
+/* common.h - Common functions
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#include <asm/types.h>
+
+#ifndef _COMMON_H
+#define _COMMON_H
+
+void die(char *msg, ...) __attribute((noreturn));
+
+/* Displays a prinf-style message and terminates the program. */
+
+void pdie(char *msg, ...) __attribute((noreturn));
+
+/* Like die, but appends an error message according to the state of errno. */
+
+void *alloc(int size);
+
+/* mallocs SIZE bytes and returns a pointer to the data. Terminates the program
+ if malloc fails. */
+
+void *qalloc(void **root, int size);
+
+/* Like alloc, but registers the data area in a list described by ROOT. */
+
+void qfree(void **root);
+
+/* Deallocates all qalloc'ed data areas described by ROOT. */
+
+int min(int a, int b);
+
+/* Returns the smaller integer value of a and b. */
+
+char get_key(char *valid, char *prompt);
+
+/* Displays PROMPT and waits for user input. Only characters in VALID are
+ accepted. Terminates the program on EOF. Returns the character. */
+
+#endif
diff --git a/src/dosfsck.c b/src/dosfsck.c
new file mode 100644
index 0000000..84ecdbb
--- /dev/null
+++ b/src/dosfsck.c
@@ -0,0 +1,224 @@
+/* dosfsck.c - User interface
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#include "version.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <getopt.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "io.h"
+#include "boot.h"
+#include "fat.h"
+#include "file.h"
+#include "check.h"
+#include "charconv.h"
+
+int interactive = 0, rw = 0, list = 0, test = 0, verbose = 0, write_immed = 0;
+int atari_format = 0, boot_only = 0;
+unsigned n_files = 0;
+void *mem_queue = NULL;
+
+static void usage(char *name)
+{
+ fprintf(stderr, "usage: %s [-aAbflrtvVwy] [-d path -d ...] "
+ "[-u path -u ...]\n%15sdevice\n", name, "");
+ fprintf(stderr, " -a automatically repair the file system\n");
+ fprintf(stderr, " -A toggle Atari file system format\n");
+ fprintf(stderr, " -b make read-only boot sector check\n");
+ fprintf(stderr, " -c N use DOS codepage N to decode short file names (default: %d)\n", DEFAULT_DOS_CODEPAGE);
+ fprintf(stderr, " -d path drop that file\n");
+ fprintf(stderr, " -f salvage unused chains to files\n");
+ fprintf(stderr, " -l list path names\n");
+ fprintf(stderr,
+ " -n no-op, check non-interactively without changing\n");
+ fprintf(stderr, " -p same as -a, for compat with other *fsck\n");
+ fprintf(stderr, " -r interactively repair the file system\n");
+ fprintf(stderr, " -t test for bad clusters\n");
+ fprintf(stderr, " -u path try to undelete that (non-directory) file\n");
+ fprintf(stderr, " -v verbose mode\n");
+ fprintf(stderr, " -V perform a verification pass\n");
+ fprintf(stderr, " -w write changes to disk immediately\n");
+ fprintf(stderr, " -y same as -a, for compat with other *fsck\n");
+ exit(2);
+}
+
+/*
+ * ++roman: On m68k, check if this is an Atari; if yes, turn on Atari variant
+ * of MS-DOS filesystem by default.
+ */
+static void check_atari(void)
+{
+#ifdef __mc68000__
+ FILE *f;
+ char line[128], *p;
+
+ if (!(f = fopen("/proc/hardware", "r"))) {
+ perror("/proc/hardware");
+ return;
+ }
+
+ while (fgets(line, sizeof(line), f)) {
+ if (strncmp(line, "Model:", 6) == 0) {
+ p = line + 6;
+ p += strspn(p, " \t");
+ if (strncmp(p, "Atari ", 6) == 0)
+ atari_format = 1;
+ break;
+ }
+ }
+ fclose(f);
+#endif
+}
+
+int main(int argc, char **argv)
+{
+ DOS_FS fs;
+ int salvage_files, verify, c;
+ unsigned n_files_check = 0, n_files_verify = 0;
+ unsigned long free_clusters;
+
+ memset(&fs, 0, sizeof(fs));
+ rw = salvage_files = verify = 0;
+ interactive = 1;
+ check_atari();
+
+ while ((c = getopt(argc, argv, "Aac:d:bflnprtu:vVwy")) != EOF)
+ switch (c) {
+ case 'A': /* toggle Atari format */
+ atari_format = !atari_format;
+ break;
+ case 'a':
+ case 'p':
+ case 'y':
+ rw = 1;
+ interactive = 0;
+ salvage_files = 1;
+ break;
+ case 'b':
+ rw = 0;
+ interactive = 0;
+ boot_only = 1;
+ break;
+ case 'c':
+ set_dos_codepage(atoi(optarg));
+ break;
+ case 'd':
+ file_add(optarg, fdt_drop);
+ break;
+ case 'f':
+ salvage_files = 1;
+ break;
+ case 'l':
+ list = 1;
+ break;
+ case 'n':
+ rw = 0;
+ interactive = 0;
+ break;
+ case 'r':
+ rw = 1;
+ interactive = 1;
+ break;
+ case 't':
+ test = 1;
+ break;
+ case 'u':
+ file_add(optarg, fdt_undelete);
+ break;
+ case 'v':
+ verbose = 1;
+ printf("dosfsck " VERSION " (" VERSION_DATE ")\n");
+ break;
+ case 'V':
+ verify = 1;
+ break;
+ case 'w':
+ write_immed = 1;
+ break;
+ default:
+ usage(argv[0]);
+ }
+ set_dos_codepage(-1); /* set default codepage if none was given in command line */
+ if ((test || write_immed) && !rw) {
+ fprintf(stderr, "-t and -w require -a or -r\n");
+ exit(2);
+ }
+ if (optind != argc - 1)
+ usage(argv[0]);
+
+ printf("dosfsck " VERSION ", " VERSION_DATE ", FAT32, LFN\n");
+ fs_open(argv[optind], rw);
+
+ read_boot(&fs);
+ if (boot_only)
+ goto exit;
+
+ if (verify)
+ printf("Starting check/repair pass.\n");
+ while (read_fat(&fs), scan_root(&fs))
+ qfree(&mem_queue);
+ if (test)
+ fix_bad(&fs);
+ if (salvage_files)
+ reclaim_file(&fs);
+ else
+ reclaim_free(&fs);
+ free_clusters = update_free(&fs);
+ file_unused();
+ qfree(&mem_queue);
+ n_files_check = n_files;
+ if (verify) {
+ n_files = 0;
+ printf("Starting verification pass.\n");
+ read_fat(&fs);
+ scan_root(&fs);
+ reclaim_free(&fs);
+ qfree(&mem_queue);
+ n_files_verify = n_files;
+ }
+
+exit:
+ if (fs_changed()) {
+ if (rw) {
+ if (interactive)
+ rw = get_key("yn", "Perform changes ? (y/n)") == 'y';
+ else
+ printf("Performing changes.\n");
+ } else
+ printf("Leaving file system unchanged.\n");
+ }
+
+ printf("%s: %u files, %lu/%lu clusters\n", argv[optind],
+ n_files, fs.clusters - free_clusters, fs.clusters);
+
+ return fs_close(rw) ? 1 : 0;
+}
diff --git a/src/dosfsck.h b/src/dosfsck.h
new file mode 100644
index 0000000..9fe103a
--- /dev/null
+++ b/src/dosfsck.h
@@ -0,0 +1,216 @@
+/* dosfsck.h - Common data structures and global variables
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#ifndef _DOSFSCK_H
+#define _DOSFSCK_H
+
+#include <sys/types.h>
+#define _LINUX_STAT_H /* hack to avoid inclusion of <linux/stat.h> */
+#define _LINUX_STRING_H_ /* hack to avoid inclusion of <linux/string.h> */
+#define _LINUX_FS_H /* hack to avoid inclusion of <linux/fs.h> */
+
+#include <asm/types.h>
+#include <asm/byteorder.h>
+
+#include <linux/msdos_fs.h>
+
+#undef CF_LE_W
+#undef CF_LE_L
+#undef CT_LE_W
+#undef CT_LE_L
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#include <byteswap.h>
+#define CF_LE_W(v) bswap_16(v)
+#define CF_LE_L(v) bswap_32(v)
+#define CT_LE_W(v) CF_LE_W(v)
+#define CT_LE_L(v) CF_LE_L(v)
+#else
+#define CF_LE_W(v) (v)
+#define CF_LE_L(v) (v)
+#define CT_LE_W(v) (v)
+#define CT_LE_L(v) (v)
+#endif /* __BIG_ENDIAN */
+
+#define VFAT_LN_ATTR (ATTR_RO | ATTR_HIDDEN | ATTR_SYS | ATTR_VOLUME)
+
+#define FAT_STATE_DIRTY 0x01
+
+/* ++roman: Use own definition of boot sector structure -- the kernel headers'
+ * name for it is msdos_boot_sector in 2.0 and fat_boot_sector in 2.1 ... */
+struct boot_sector {
+ __u8 ignored[3]; /* Boot strap short or near jump */
+ __u8 system_id[8]; /* Name - can be used to special case
+ partition manager volumes */
+ __u8 sector_size[2]; /* bytes per logical sector */
+ __u8 cluster_size; /* sectors/cluster */
+ __u16 reserved; /* reserved sectors */
+ __u8 fats; /* number of FATs */
+ __u8 dir_entries[2]; /* root directory entries */
+ __u8 sectors[2]; /* number of sectors */
+ __u8 media; /* media code (unused) */
+ __u16 fat_length; /* sectors/FAT */
+ __u16 secs_track; /* sectors per track */
+ __u16 heads; /* number of heads */
+ __u32 hidden; /* hidden sectors (unused) */
+ __u32 total_sect; /* number of sectors (if sectors == 0) */
+
+ /* The following fields are only used by FAT32 */
+ __u32 fat32_length; /* sectors/FAT */
+ __u16 flags; /* bit 8: fat mirroring, low 4: active fat */
+ __u8 version[2]; /* major, minor filesystem version */
+ __u32 root_cluster; /* first cluster in root directory */
+ __u16 info_sector; /* filesystem info sector */
+ __u16 backup_boot; /* backup boot sector */
+ __u8 reserved2[12]; /* Unused */
+
+ __u8 drive_number; /* Logical Drive Number */
+ __u8 reserved3; /* Unused */
+
+ __u8 extended_sig; /* Extended Signature (0x29) */
+ __u32 serial; /* Serial number */
+ __u8 label[11]; /* FS label */
+ __u8 fs_type[8]; /* FS Type */
+
+ /* fill up to 512 bytes */
+ __u8 junk[422];
+} __attribute__ ((packed));
+
+struct boot_sector_16 {
+ __u8 ignored[3]; /* Boot strap short or near jump */
+ __u8 system_id[8]; /* Name - can be used to special case
+ partition manager volumes */
+ __u8 sector_size[2]; /* bytes per logical sector */
+ __u8 cluster_size; /* sectors/cluster */
+ __u16 reserved; /* reserved sectors */
+ __u8 fats; /* number of FATs */
+ __u8 dir_entries[2]; /* root directory entries */
+ __u8 sectors[2]; /* number of sectors */
+ __u8 media; /* media code (unused) */
+ __u16 fat_length; /* sectors/FAT */
+ __u16 secs_track; /* sectors per track */
+ __u16 heads; /* number of heads */
+ __u32 hidden; /* hidden sectors (unused) */
+ __u32 total_sect; /* number of sectors (if sectors == 0) */
+
+ __u8 drive_number; /* Logical Drive Number */
+ __u8 reserved2; /* Unused */
+
+ __u8 extended_sig; /* Extended Signature (0x29) */
+ __u32 serial; /* Serial number */
+ __u8 label[11]; /* FS label */
+ __u8 fs_type[8]; /* FS Type */
+
+ /* fill up to 512 bytes */
+ __u8 junk[450];
+} __attribute__ ((packed));
+
+struct info_sector {
+ __u32 magic; /* Magic for info sector ('RRaA') */
+ __u8 junk[0x1dc];
+ __u32 reserved1; /* Nothing as far as I can tell */
+ __u32 signature; /* 0x61417272 ('rrAa') */
+ __u32 free_clusters; /* Free cluster count. -1 if unknown */
+ __u32 next_cluster; /* Most recently allocated cluster. */
+ __u32 reserved2[3];
+ __u16 reserved3;
+ __u16 boot_sign;
+};
+
+typedef struct {
+ __u8 name[8], ext[3]; /* name and extension */
+ __u8 attr; /* attribute bits */
+ __u8 lcase; /* Case for base and extension */
+ __u8 ctime_ms; /* Creation time, milliseconds */
+ __u16 ctime; /* Creation time */
+ __u16 cdate; /* Creation date */
+ __u16 adate; /* Last access date */
+ __u16 starthi; /* High 16 bits of cluster in FAT32 */
+ __u16 time, date, start; /* time, date and first cluster */
+ __u32 size; /* file size (in bytes) */
+} __attribute__ ((packed)) DIR_ENT;
+
+typedef struct _dos_file {
+ DIR_ENT dir_ent;
+ char *lfn;
+ loff_t offset;
+ loff_t lfn_offset;
+ struct _dos_file *parent; /* parent directory */
+ struct _dos_file *next; /* next entry */
+ struct _dos_file *first; /* first entry (directory only) */
+} DOS_FILE;
+
+typedef struct {
+ unsigned long value;
+ unsigned long reserved;
+} FAT_ENTRY;
+
+typedef struct {
+ int nfats;
+ loff_t fat_start;
+ unsigned int fat_size; /* unit is bytes */
+ unsigned int fat_bits; /* size of a FAT entry */
+ unsigned int eff_fat_bits; /* # of used bits in a FAT entry */
+ unsigned long root_cluster; /* 0 for old-style root dir */
+ loff_t root_start;
+ unsigned int root_entries;
+ loff_t data_start;
+ unsigned int cluster_size;
+ unsigned long clusters;
+ loff_t fsinfo_start; /* 0 if not present */
+ long free_clusters;
+ loff_t backupboot_start; /* 0 if not present */
+ unsigned char *fat;
+ DOS_FILE **cluster_owner;
+ char *label;
+} DOS_FS;
+
+#ifndef offsetof
+#define offsetof(t,e) ((int)&(((t *)0)->e))
+#endif
+
+extern int interactive, rw, list, verbose, test, write_immed;
+extern int atari_format;
+extern unsigned n_files;
+extern void *mem_queue;
+
+/* value to use as end-of-file marker */
+#define FAT_EOF(fs) ((atari_format ? 0xfff : 0xff8) | FAT_EXTD(fs))
+#define FAT_IS_EOF(fs,v) ((unsigned long)(v) >= (0xff8|FAT_EXTD(fs)))
+/* value to mark bad clusters */
+#define FAT_BAD(fs) (0xff7 | FAT_EXTD(fs))
+/* range of values used for bad clusters */
+#define FAT_MIN_BAD(fs) ((atari_format ? 0xff0 : 0xff7) | FAT_EXTD(fs))
+#define FAT_MAX_BAD(fs) ((atari_format ? 0xff7 : 0xff7) | FAT_EXTD(fs))
+#define FAT_IS_BAD(fs,v) ((v) >= FAT_MIN_BAD(fs) && (v) <= FAT_MAX_BAD(fs))
+
+/* return -16 as a number with fs->fat_bits bits */
+#define FAT_EXTD(fs) (((1 << fs->eff_fat_bits)-1) & ~0xf)
+
+/* marker for files with no 8.3 name */
+#define FAT_NO_83NAME 32
+
+#endif
diff --git a/src/dosfslabel.c b/src/dosfslabel.c
new file mode 100644
index 0000000..dd8d36a
--- /dev/null
+++ b/src/dosfslabel.c
@@ -0,0 +1,144 @@
+/* dosfslabel.c - User interface
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2007 Red Hat, Inc.
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#include "version.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <ctype.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "io.h"
+#include "boot.h"
+#include "fat.h"
+#include "file.h"
+#include "check.h"
+
+int interactive = 0, rw = 0, list = 0, test = 0, verbose = 0, write_immed = 0;
+int atari_format = 0;
+unsigned n_files = 0;
+void *mem_queue = NULL;
+
+static void usage(int error)
+{
+ FILE *f = error ? stderr : stdout;
+ int status = error ? 1 : 0;
+
+ fprintf(f, "usage: dosfslabel device [label]\n");
+ exit(status);
+}
+
+/*
+ * ++roman: On m68k, check if this is an Atari; if yes, turn on Atari variant
+ * of MS-DOS filesystem by default.
+ */
+static void check_atari(void)
+{
+#ifdef __mc68000__
+ FILE *f;
+ char line[128], *p;
+
+ if (!(f = fopen("/proc/hardware", "r"))) {
+ perror("/proc/hardware");
+ return;
+ }
+
+ while (fgets(line, sizeof(line), f)) {
+ if (strncmp(line, "Model:", 6) == 0) {
+ p = line + 6;
+ p += strspn(p, " \t");
+ if (strncmp(p, "Atari ", 6) == 0)
+ atari_format = 1;
+ break;
+ }
+ }
+ fclose(f);
+#endif
+}
+
+int main(int argc, char *argv[])
+{
+ DOS_FS fs = {0};
+ rw = 0;
+
+ int i;
+
+ char *device = NULL;
+ char *label = NULL;
+
+ loff_t offset;
+ DIR_ENT de;
+
+ check_atari();
+
+ if (argc < 2 || argc > 3)
+ usage(1);
+
+ if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help"))
+ usage(0);
+ else if (!strcmp(argv[1], "-V") || !strcmp(argv[1], "--version")) {
+ printf("dosfslabel " VERSION ", " VERSION_DATE ", FAT32, LFN\n");
+ exit(0);
+ }
+
+ device = argv[1];
+ if (argc == 3) {
+ label = argv[2];
+ if (strlen(label) > 11) {
+ fprintf(stderr,
+ "dosfslabel: labels can be no longer than 11 characters\n");
+ exit(1);
+ }
+ for (i = 0; i < 11; i++)
+ /* don't know if here should be more strict !uppercase(label[i])*/
+ if (islower(label[i])) {
+ fprintf(stderr,
+ "dosfslabel: labels cannot contain lower case characters\n");
+ exit(1);
+ }
+ rw = 1;
+ }
+
+ fs_open(device, rw);
+ read_boot(&fs);
+ if (fs.fat_bits == 32)
+ read_fat(&fs);
+ if (!rw) {
+ offset = find_volume_de(&fs, &de);
+ if (offset == 0)
+ fprintf(stdout, "%s\n", fs.label);
+ else
+ fprintf(stdout, "%.8s%.3s\n", de.name, de.ext);
+ exit(0);
+ }
+
+ write_label(&fs, label);
+ fs_close(rw);
+ return 0;
+}
diff --git a/src/fat.c b/src/fat.c
new file mode 100644
index 0000000..a735458
--- /dev/null
+++ b/src/fat.c
@@ -0,0 +1,550 @@
+/* fat.c - Read/write access to the FAT
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "common.h"
+#include "dosfsck.h"
+#include "io.h"
+#include "check.h"
+#include "fat.h"
+
+/**
+ * Fetch the FAT entry for a specified cluster.
+ *
+ * @param[out] entry Cluster to which cluster of interest is linked
+ * @param[in] fat FAT table for the partition
+ * @param[in] cluster Cluster of interest
+ * @param[in] fs Information from the FAT boot sectors (bits per FAT entry)
+ */
+void get_fat(FAT_ENTRY * entry, void *fat, unsigned long cluster, DOS_FS * fs)
+{
+ unsigned char *ptr;
+
+ switch (fs->fat_bits) {
+ case 12:
+ ptr = &((unsigned char *)fat)[cluster * 3 / 2];
+ entry->value = 0xfff & (cluster & 1 ? (ptr[0] >> 4) | (ptr[1] << 4) :
+ (ptr[0] | ptr[1] << 8));
+ break;
+ case 16:
+ entry->value = CF_LE_W(((unsigned short *)fat)[cluster]);
+ break;
+ case 32:
+ /* According to M$, the high 4 bits of a FAT32 entry are reserved and
+ * are not part of the cluster number. So we cut them off. */
+ {
+ unsigned long e = CF_LE_L(((unsigned int *)fat)[cluster]);
+ entry->value = e & 0xfffffff;
+ entry->reserved = e >> 28;
+ }
+ break;
+ default:
+ die("Bad FAT entry size: %d bits.", fs->fat_bits);
+ }
+}
+
+/**
+ * Build a bookkeeping structure from the partition's FAT table.
+ * If the partition has multiple FATs and they don't agree, try to pick a winner,
+ * and queue a command to overwrite the loser.
+ * One error that is fixed here is a cluster that links to something out of range.
+ *
+ * @param[inout] fs Information about the filesystem
+ */
+void read_fat(DOS_FS * fs)
+{
+ int eff_size;
+ unsigned long i;
+ void *first, *second = NULL;
+ int first_ok, second_ok;
+ unsigned long total_num_clusters;
+
+ /* Clean up from previous pass */
+ if (fs->fat)
+ free(fs->fat);
+ if (fs->cluster_owner)
+ free(fs->cluster_owner);
+ fs->fat = NULL;
+ fs->cluster_owner = NULL;
+
+ total_num_clusters = fs->clusters + 2UL;
+ eff_size = (total_num_clusters * fs->fat_bits + 7) / 8ULL;
+ first = alloc(eff_size);
+ fs_read(fs->fat_start, eff_size, first);
+ if (fs->nfats > 1) {
+ second = alloc(eff_size);
+ fs_read(fs->fat_start + fs->fat_size, eff_size, second);
+ }
+ if (second && memcmp(first, second, eff_size) != 0) {
+ FAT_ENTRY first_media, second_media;
+ get_fat(&first_media, first, 0, fs);
+ get_fat(&second_media, second, 0, fs);
+ first_ok = (first_media.value & FAT_EXTD(fs)) == FAT_EXTD(fs);
+ second_ok = (second_media.value & FAT_EXTD(fs)) == FAT_EXTD(fs);
+ if (first_ok && !second_ok) {
+ printf("FATs differ - using first FAT.\n");
+ fs_write(fs->fat_start + fs->fat_size, eff_size, first);
+ }
+ if (!first_ok && second_ok) {
+ printf("FATs differ - using second FAT.\n");
+ fs_write(fs->fat_start, eff_size, second);
+ memcpy(first, second, eff_size);
+ }
+ if (first_ok && second_ok) {
+ if (interactive) {
+ printf("FATs differ but appear to be intact. Use which FAT ?\n"
+ "1) Use first FAT\n2) Use second FAT\n");
+ if (get_key("12", "?") == '1') {
+ fs_write(fs->fat_start + fs->fat_size, eff_size, first);
+ } else {
+ fs_write(fs->fat_start, eff_size, second);
+ memcpy(first, second, eff_size);
+ }
+ } else {
+ printf("FATs differ but appear to be intact. Using first "
+ "FAT.\n");
+ fs_write(fs->fat_start + fs->fat_size, eff_size, first);
+ }
+ }
+ if (!first_ok && !second_ok) {
+ printf("Both FATs appear to be corrupt. Giving up.\n");
+ exit(1);
+ }
+ }
+ if (second) {
+ free(second);
+ }
+ fs->fat = (unsigned char *)first;
+
+ fs->cluster_owner = alloc(total_num_clusters * sizeof(DOS_FILE *));
+ memset(fs->cluster_owner, 0, (total_num_clusters * sizeof(DOS_FILE *)));
+
+ /* Truncate any cluster chains that link to something out of range */
+ for (i = 2; i < fs->clusters + 2; i++) {
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, i, fs);
+ if (curEntry.value == 1) {
+ printf("Cluster %ld out of range (1). Setting to EOF.\n", i - 2);
+ set_fat(fs, i, -1);
+ }
+ if (curEntry.value >= fs->clusters + 2 &&
+ (curEntry.value < FAT_MIN_BAD(fs))) {
+ printf("Cluster %ld out of range (%ld > %ld). Setting to EOF.\n",
+ i - 2, curEntry.value, fs->clusters + 2 - 1);
+ set_fat(fs, i, -1);
+ }
+ }
+}
+
+/**
+ * Update the FAT entry for a specified cluster
+ * (i.e., change the cluster it links to).
+ * Queue a command to write out this change.
+ *
+ * @param[in,out] fs Information about the filesystem
+ * @param[in] cluster Cluster to change
+ * @param[in] new Cluster to link to
+ * Special values:
+ * 0 == free cluster
+ * -1 == end-of-chain
+ * -2 == bad cluster
+ */
+void set_fat(DOS_FS * fs, unsigned long cluster, unsigned long new)
+{
+ unsigned char *data = NULL;
+ int size;
+ loff_t offs;
+
+ if ((long)new == -1)
+ new = FAT_EOF(fs);
+ else if ((long)new == -2)
+ new = FAT_BAD(fs);
+ switch (fs->fat_bits) {
+ case 12:
+ data = fs->fat + cluster * 3 / 2;
+ offs = fs->fat_start + cluster * 3 / 2;
+ if (cluster & 1) {
+ FAT_ENTRY prevEntry;
+ get_fat(&prevEntry, fs->fat, cluster - 1, fs);
+ data[0] = ((new & 0xf) << 4) | (prevEntry.value >> 8);
+ data[1] = new >> 4;
+ } else {
+ FAT_ENTRY subseqEntry;
+ get_fat(&subseqEntry, fs->fat, cluster + 1, fs);
+ data[0] = new & 0xff;
+ data[1] = (new >> 8) | (cluster == fs->clusters - 1 ? 0 :
+ (0xff & subseqEntry.value) << 4);
+ }
+ size = 2;
+ break;
+ case 16:
+ data = fs->fat + cluster * 2;
+ offs = fs->fat_start + cluster * 2;
+ *(unsigned short *)data = CT_LE_W(new);
+ size = 2;
+ break;
+ case 32:
+ {
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, cluster, fs);
+
+ data = fs->fat + cluster * 4;
+ offs = fs->fat_start + cluster * 4;
+ /* According to M$, the high 4 bits of a FAT32 entry are reserved and
+ * are not part of the cluster number. So we never touch them. */
+ *(unsigned long *)data = CT_LE_L((new & 0xfffffff) |
+ (curEntry.reserved << 28));
+ size = 4;
+ }
+ break;
+ default:
+ die("Bad FAT entry size: %d bits.", fs->fat_bits);
+ }
+ fs_write(offs, size, data);
+ if (fs->nfats > 1) {
+ fs_write(offs + fs->fat_size, size, data);
+ }
+}
+
+int bad_cluster(DOS_FS * fs, unsigned long cluster)
+{
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, cluster, fs);
+
+ return FAT_IS_BAD(fs, curEntry.value);
+}
+
+/**
+ * Get the cluster to which the specified cluster is linked.
+ * If the linked cluster is marked bad, abort.
+ *
+ * @param[in] fs Information about the filesystem
+ * @param[in] cluster Cluster to follow
+ *
+ * @return -1 'cluster' is at the end of the chain
+ * @return Other values Next cluster in this chain
+ */
+unsigned long next_cluster(DOS_FS * fs, unsigned long cluster)
+{
+ unsigned long value;
+ FAT_ENTRY curEntry;
+
+ get_fat(&curEntry, fs->fat, cluster, fs);
+
+ value = curEntry.value;
+ if (FAT_IS_BAD(fs, value))
+ die("Internal error: next_cluster on bad cluster");
+ return FAT_IS_EOF(fs, value) ? -1 : value;
+}
+
+loff_t cluster_start(DOS_FS * fs, unsigned long cluster)
+{
+ return fs->data_start + ((loff_t) cluster -
+ 2) * (unsigned long long)fs->cluster_size;
+}
+
+/**
+ * Update internal bookkeeping to show that the specified cluster belongs
+ * to the specified dentry.
+ *
+ * @param[in,out] fs Information about the filesystem
+ * @param[in] cluster Cluster being assigned
+ * @param[in] owner Information on dentry that owns this cluster
+ * (may be NULL)
+ */
+void set_owner(DOS_FS * fs, unsigned long cluster, DOS_FILE * owner)
+{
+ if (fs->cluster_owner == NULL)
+ die("Internal error: attempt to set owner in non-existent table");
+
+ if (owner && fs->cluster_owner[cluster]
+ && (fs->cluster_owner[cluster] != owner))
+ die("Internal error: attempt to change file owner");
+ fs->cluster_owner[cluster] = owner;
+}
+
+DOS_FILE *get_owner(DOS_FS * fs, unsigned long cluster)
+{
+ if (fs->cluster_owner == NULL)
+ return NULL;
+ else
+ return fs->cluster_owner[cluster];
+}
+
+void fix_bad(DOS_FS * fs)
+{
+ unsigned long i;
+
+ if (verbose)
+ printf("Checking for bad clusters.\n");
+ for (i = 2; i < fs->clusters + 2; i++) {
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, i, fs);
+
+ if (!get_owner(fs, i) && !FAT_IS_BAD(fs, curEntry.value))
+ if (!fs_test(cluster_start(fs, i), fs->cluster_size)) {
+ printf("Cluster %lu is unreadable.\n", i);
+ set_fat(fs, i, -2);
+ }
+ }
+}
+
+void reclaim_free(DOS_FS * fs)
+{
+ int reclaimed;
+ unsigned long i;
+
+ if (verbose)
+ printf("Checking for unused clusters.\n");
+ reclaimed = 0;
+ for (i = 2; i < fs->clusters + 2; i++) {
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, i, fs);
+
+ if (!get_owner(fs, i) && curEntry.value &&
+ !FAT_IS_BAD(fs, curEntry.value)) {
+ set_fat(fs, i, 0);
+ reclaimed++;
+ }
+ }
+ if (reclaimed)
+ printf("Reclaimed %d unused cluster%s (%llu bytes).\n", reclaimed,
+ reclaimed == 1 ? "" : "s",
+ (unsigned long long)reclaimed * fs->cluster_size);
+}
+
+/**
+ * Assign the specified owner to all orphan chains (except cycles).
+ * Break cross-links between orphan chains.
+ *
+ * @param[in,out] fs Information about the filesystem
+ * @param[in] owner dentry to be assigned ownership of orphans
+ * @param[in,out] num_refs For each orphan cluster [index], how many
+ * clusters link to it.
+ * @param[in] start_cluster Where to start scanning for orphans
+ */
+static void tag_free(DOS_FS * fs, DOS_FILE * owner, unsigned long *num_refs,
+ unsigned long start_cluster)
+{
+ int prev;
+ unsigned long i, walk;
+
+ if (start_cluster == 0)
+ start_cluster = 2;
+
+ for (i = start_cluster; i < fs->clusters + 2; i++) {
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, i, fs);
+
+ /* If the current entry is the head of an un-owned chain... */
+ if (curEntry.value && !FAT_IS_BAD(fs, curEntry.value) &&
+ !get_owner(fs, i) && !num_refs[i]) {
+ prev = 0;
+ /* Walk the chain, claiming ownership as we go */
+ for (walk = i; walk != -1; walk = next_cluster(fs, walk)) {
+ if (!get_owner(fs, walk)) {
+ set_owner(fs, walk, owner);
+ } else {
+ /* We've run into cross-links between orphaned chains,
+ * or a cycle with a tail.
+ * Terminate this orphan chain (break the link)
+ */
+ set_fat(fs, prev, -1);
+
+ /* This is not necessary because 'walk' is owned and thus
+ * will never become the head of a chain (the only case
+ * that would matter during reclaim to files).
+ * It's easier to decrement than to prove that it's
+ * unnecessary.
+ */
+ num_refs[walk]--;
+ break;
+ }
+ prev = walk;
+ }
+ }
+ }
+}
+
+/**
+ * Recover orphan chains to files, handling any cycles or cross-links.
+ *
+ * @param[in,out] fs Information about the filesystem
+ */
+void reclaim_file(DOS_FS * fs)
+{
+ DOS_FILE orphan;
+ int reclaimed, files;
+ int changed = 0;
+ unsigned long i, next, walk;
+ unsigned long *num_refs = NULL; /* Only for orphaned clusters */
+ unsigned long total_num_clusters;
+
+ if (verbose)
+ printf("Reclaiming unconnected clusters.\n");
+
+ total_num_clusters = fs->clusters + 2UL;
+ num_refs = alloc(total_num_clusters * sizeof(unsigned long));
+ memset(num_refs, 0, (total_num_clusters * sizeof(unsigned long)));
+
+ /* Guarantee that all orphan chains (except cycles) end cleanly
+ * with an end-of-chain mark.
+ */
+
+ for (i = 2; i < total_num_clusters; i++) {
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, i, fs);
+
+ next = curEntry.value;
+ if (!get_owner(fs, i) && next && next < fs->clusters + 2) {
+ /* Cluster is linked, but not owned (orphan) */
+ FAT_ENTRY nextEntry;
+ get_fat(&nextEntry, fs->fat, next, fs);
+
+ /* Mark it end-of-chain if it links into an owned cluster,
+ * a free cluster, or a bad cluster.
+ */
+ if (get_owner(fs, next) || !nextEntry.value ||
+ FAT_IS_BAD(fs, nextEntry.value))
+ set_fat(fs, i, -1);
+ else
+ num_refs[next]++;
+ }
+ }
+
+ /* Scan until all the orphans are accounted for,
+ * and all cycles and cross-links are broken
+ */
+ do {
+ tag_free(fs, &orphan, num_refs, changed);
+ changed = 0;
+
+ /* Any unaccounted-for orphans must be part of a cycle */
+ for (i = 2; i < total_num_clusters; i++) {
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, i, fs);
+
+ if (curEntry.value && !FAT_IS_BAD(fs, curEntry.value) &&
+ !get_owner(fs, i)) {
+ if (!num_refs[curEntry.value]--)
+ die("Internal error: num_refs going below zero");
+ set_fat(fs, i, -1);
+ changed = curEntry.value;
+ printf("Broke cycle at cluster %lu in free chain.\n", i);
+
+ /* If we've created a new chain head,
+ * tag_free() can claim it
+ */
+ if (num_refs[curEntry.value] == 0)
+ break;
+ }
+ }
+ }
+ while (changed);
+
+ /* Now we can start recovery */
+ files = reclaimed = 0;
+ for (i = 2; i < total_num_clusters; i++)
+ /* If this cluster is the head of an orphan chain... */
+ if (get_owner(fs, i) == &orphan && !num_refs[i]) {
+ DIR_ENT de;
+ loff_t offset;
+ files++;
+ offset = alloc_rootdir_entry(fs, &de, "FSCK%04dREC");
+ de.start = CT_LE_W(i & 0xffff);
+ if (fs->fat_bits == 32)
+ de.starthi = CT_LE_W(i >> 16);
+ for (walk = i; walk > 0 && walk != -1;
+ walk = next_cluster(fs, walk)) {
+ de.size = CT_LE_L(CF_LE_L(de.size) + fs->cluster_size);
+ reclaimed++;
+ }
+ fs_write(offset, sizeof(DIR_ENT), &de);
+ }
+ if (reclaimed)
+ printf("Reclaimed %d unused cluster%s (%llu bytes) in %d chain%s.\n",
+ reclaimed, reclaimed == 1 ? "" : "s",
+ (unsigned long long)reclaimed * fs->cluster_size, files,
+ files == 1 ? "" : "s");
+
+ free(num_refs);
+}
+
+unsigned long update_free(DOS_FS * fs)
+{
+ unsigned long i;
+ unsigned long free = 0;
+ int do_set = 0;
+
+ for (i = 2; i < fs->clusters + 2; i++) {
+ FAT_ENTRY curEntry;
+ get_fat(&curEntry, fs->fat, i, fs);
+
+ if (!get_owner(fs, i) && !FAT_IS_BAD(fs, curEntry.value))
+ ++free;
+ }
+
+ if (!fs->fsinfo_start)
+ return free;
+
+ if (verbose)
+ printf("Checking free cluster summary.\n");
+ if (fs->free_clusters != 0xFFFFFFFF) {
+ if (free != fs->free_clusters) {
+ printf("Free cluster summary wrong (%ld vs. really %ld)\n",
+ fs->free_clusters, free);
+ if (interactive)
+ printf("1) Correct\n2) Don't correct\n");
+ else
+ printf(" Auto-correcting.\n");
+ if (!interactive || get_key("12", "?") == '1')
+ do_set = 1;
+ }
+ } else {
+ printf("Free cluster summary uninitialized (should be %ld)\n", free);
+ if (rw) {
+ if (interactive)
+ printf("1) Set it\n2) Leave it uninitialized\n");
+ else
+ printf(" Auto-setting.\n");
+ if (!interactive || get_key("12", "?") == '1')
+ do_set = 1;
+ }
+ }
+
+ if (do_set) {
+ unsigned long le_free = CT_LE_L(free);
+ fs->free_clusters = free;
+ fs_write(fs->fsinfo_start + offsetof(struct info_sector, free_clusters),
+ sizeof(le_free), &le_free);
+ }
+
+ return free;
+}
diff --git a/src/fat.h b/src/fat.h
new file mode 100644
index 0000000..7eaef9e
--- /dev/null
+++ b/src/fat.h
@@ -0,0 +1,85 @@
+/* fat.h - Read/write access to the FAT
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#ifndef _FAT_H
+#define _FAT_H
+
+void read_fat(DOS_FS * fs);
+
+/* Loads the FAT of the file system described by FS. Initializes the FAT,
+ replaces broken FATs and rejects invalid cluster entries. */
+
+void get_fat(FAT_ENTRY * entry, void *fat, unsigned long cluster, DOS_FS * fs);
+
+/* Retrieve the FAT entry (next chained cluster) for CLUSTER. */
+
+void set_fat(DOS_FS * fs, unsigned long cluster, unsigned long new);
+
+/* Changes the value of the CLUSTERth cluster of the FAT of FS to NEW. Special
+ values of NEW are -1 (EOF, 0xff8 or 0xfff8) and -2 (bad sector, 0xff7 or
+ 0xfff7) */
+
+int bad_cluster(DOS_FS * fs, unsigned long cluster);
+
+/* Returns a non-zero integer if the CLUSTERth cluster is marked as bad or zero
+ otherwise. */
+
+unsigned long next_cluster(DOS_FS * fs, unsigned long cluster);
+
+/* Returns the number of the cluster following CLUSTER, or -1 if this is the
+ last cluster of the respective cluster chain. CLUSTER must not be a bad
+ cluster. */
+
+loff_t cluster_start(DOS_FS * fs, unsigned long cluster);
+
+/* Returns the byte offset of CLUSTER, relative to the respective device. */
+
+void set_owner(DOS_FS * fs, unsigned long cluster, DOS_FILE * owner);
+
+/* Sets the owner pointer of the respective cluster to OWNER. If OWNER was NULL
+ before, it can be set to NULL or any non-NULL value. Otherwise, only NULL is
+ accepted as the new value. */
+
+DOS_FILE *get_owner(DOS_FS * fs, unsigned long cluster);
+
+/* Returns the owner of the repective cluster or NULL if the cluster has no
+ owner. */
+
+void fix_bad(DOS_FS * fs);
+
+/* Scans the disk for currently unused bad clusters and marks them as bad. */
+
+void reclaim_free(DOS_FS * fs);
+
+/* Marks all allocated, but unused clusters as free. */
+
+void reclaim_file(DOS_FS * fs);
+
+/* Scans the FAT for chains of allocated, but unused clusters and creates files
+ for them in the root directory. Also tries to fix all inconsistencies (e.g.
+ loops, shared clusters, etc.) in the process. */
+
+unsigned long update_free(DOS_FS * fs);
+
+/* Updates free cluster count in FSINFO sector. */
+
+#endif
diff --git a/src/file.c b/src/file.c
new file mode 100644
index 0000000..1272e17
--- /dev/null
+++ b/src/file.c
@@ -0,0 +1,286 @@
+/* file.c - Additional file attributes
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+
+#define _LINUX_STAT_H /* hack to avoid inclusion of <linux/stat.h> */
+#define _LINUX_STRING_H_ /* hack to avoid inclusion of <linux/string.h> */
+#define _LINUX_FS_H /* hack to avoid inclusion of <linux/fs.h> */
+
+#include <asm/types.h>
+
+#include <linux/msdos_fs.h>
+
+#include "common.h"
+#include "file.h"
+#include "charconv.h"
+
+FDSC *fp_root = NULL;
+
+static void put_char(char **p, unsigned char c)
+{
+ if (dos_char_to_printable(p, c))
+ return;
+ if ((c >= ' ' && c < 0x7f) || c >= 0xa0)
+ *(*p)++ = c;
+ else {
+ *(*p)++ = '\\';
+ *(*p)++ = '0' + (c >> 6);
+ *(*p)++ = '0' + ((c >> 3) & 7);
+ *(*p)++ = '0' + (c & 7);
+ }
+}
+
+/**
+ * Construct the "pretty-printed" representation of the name in a short directory entry.
+ *
+ * @param[in] fixed Pointer to name[0] of a DIR_ENT
+ *
+ * @return Pointer to static string containing pretty "8.3" equivalent of the
+ * name in the directory entry.
+ */
+char *file_name(unsigned char *fixed)
+{
+ static char path[MSDOS_NAME * 4 + 2];
+ char *p;
+ int i, j;
+
+ p = path;
+ for (i = j = 0; i < 8; i++)
+ if (fixed[i] != ' ') {
+ while (j++ < i)
+ *p++ = ' ';
+ put_char(&p, fixed[i]);
+ }
+ if (strncmp((const char *)(fixed + 8), " ", 3)) {
+ *p++ = '.';
+ for (i = j = 0; i < 3; i++)
+ if (fixed[i + 8] != ' ') {
+ while (j++ < i)
+ *p++ = ' ';
+ put_char(&p, fixed[i + 8]);
+ }
+ }
+ *p = 0;
+ return path;
+}
+
+int file_cvt(unsigned char *name, unsigned char *fixed)
+{
+ unsigned char c;
+ int size, ext, cnt;
+
+ size = 8;
+ ext = 0;
+ while (*name) {
+ c = *name;
+ if (c < ' ' || c > 0x7e || strchr("*?<>|\"/", c)) {
+ printf("Invalid character in name. Use \\ooo for special "
+ "characters.\n");
+ return 0;
+ }
+ if (c == '.') {
+ if (ext) {
+ printf("Duplicate dots in name.\n");
+ return 0;
+ }
+ while (size--)
+ *fixed++ = ' ';
+ size = 3;
+ ext = 1;
+ name++;
+ continue;
+ }
+ if (c == '\\') {
+ c = 0;
+ for (cnt = 3; cnt; cnt--) {
+ if (*name < '0' || *name > '7') {
+ printf("Invalid octal character.\n");
+ return 0;
+ }
+ c = c * 8 + *name++ - '0';
+ }
+ if (cnt < 4) {
+ printf("Expected three octal digits.\n");
+ return 0;
+ }
+ name += 3;
+ }
+ if (islower(c))
+ c = toupper(c);
+ if (size) {
+ *fixed++ = c;
+ size--;
+ }
+ name++;
+ }
+ if (*name || size == 8)
+ return 0;
+ if (!ext) {
+ while (size--)
+ *fixed++ = ' ';
+ size = 3;
+ }
+ while (size--)
+ *fixed++ = ' ';
+ return 1;
+}
+
+void file_add(char *path, FD_TYPE type)
+{
+ FDSC **current, *walk;
+ char name[MSDOS_NAME];
+ char *here;
+
+ current = &fp_root;
+ if (*path != '/')
+ die("%s: Absolute path required.", path);
+ path++;
+ while (1) {
+ if ((here = strchr(path, '/')))
+ *here = 0;
+ if (!file_cvt((unsigned char *)path, (unsigned char *)name))
+ exit(2);
+ for (walk = *current; walk; walk = walk->next)
+ if (!here && (!strncmp(name, walk->name, MSDOS_NAME) || (type ==
+ fdt_undelete
+ &&
+ !strncmp
+ (name + 1,
+ walk->name
+ + 1,
+ MSDOS_NAME
+ - 1))))
+ die("Ambiguous name: \"%s\"", path);
+ else if (here && !strncmp(name, walk->name, MSDOS_NAME))
+ break;
+ if (!walk) {
+ walk = alloc(sizeof(FDSC));
+ strncpy(walk->name, name, MSDOS_NAME);
+ walk->type = here ? fdt_none : type;
+ walk->first = NULL;
+ walk->next = *current;
+ *current = walk;
+ }
+ current = &walk->first;
+ if (!here)
+ break;
+ *here = '/';
+ path = here + 1;
+ }
+}
+
+FDSC **file_cd(FDSC ** curr, char *fixed)
+{
+ FDSC **walk;
+
+ if (!curr || !*curr)
+ return NULL;
+ for (walk = curr; *walk; walk = &(*walk)->next)
+ if (!strncmp((*walk)->name, fixed, MSDOS_NAME) && (*walk)->first)
+ return &(*walk)->first;
+ return NULL;
+}
+
+static FDSC **file_find(FDSC ** dir, char *fixed)
+{
+ if (!dir || !*dir)
+ return NULL;
+ if (*(unsigned char *)fixed == DELETED_FLAG) {
+ while (*dir) {
+ if (!strncmp((*dir)->name + 1, fixed + 1, MSDOS_NAME - 1)
+ && !(*dir)->first)
+ return dir;
+ dir = &(*dir)->next;
+ }
+ return NULL;
+ }
+ while (*dir) {
+ if (!strncmp((*dir)->name, fixed, MSDOS_NAME) && !(*dir)->first)
+ return dir;
+ dir = &(*dir)->next;
+ }
+ return NULL;
+}
+
+/* Returns the attribute of the file FIXED in directory CURR or FDT_NONE if no
+ such file exists or if CURR is NULL. */
+FD_TYPE file_type(FDSC ** curr, char *fixed)
+{
+ FDSC **this;
+
+ if ((this = file_find(curr, fixed)))
+ return (*this)->type;
+ return fdt_none;
+}
+
+void file_modify(FDSC ** curr, char *fixed)
+{
+ FDSC **this, *next;
+
+ if (!(this = file_find(curr, fixed)))
+ die("Internal error: file_find failed");
+ switch ((*this)->type) {
+ case fdt_drop:
+ printf("Dropping %s\n", file_name((unsigned char *)fixed));
+ *(unsigned char *)fixed = DELETED_FLAG;
+ break;
+ case fdt_undelete:
+ *fixed = *(*this)->name;
+ printf("Undeleting %s\n", file_name((unsigned char *)fixed));
+ break;
+ default:
+ die("Internal error: file_modify");
+ }
+ next = (*this)->next;
+ free(*this);
+ *this = next;
+}
+
+static void report_unused(FDSC * this)
+{
+ FDSC *next;
+
+ while (this) {
+ next = this->next;
+ if (this->first)
+ report_unused(this->first);
+ else if (this->type != fdt_none)
+ printf("Warning: did not %s file %s\n", this->type == fdt_drop ?
+ "drop" : "undelete", file_name((unsigned char *)this->name));
+ free(this);
+ this = next;
+ }
+}
+
+void file_unused(void)
+{
+ report_unused(fp_root);
+}
diff --git a/src/file.h b/src/file.h
new file mode 100644
index 0000000..c7e2e4d
--- /dev/null
+++ b/src/file.h
@@ -0,0 +1,70 @@
+/* file.h - Additional file attributes
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#ifndef _FILE_H
+#define _FILE_H
+
+typedef enum { fdt_none, fdt_drop, fdt_undelete } FD_TYPE;
+
+typedef struct _fptr {
+ char name[MSDOS_NAME];
+ FD_TYPE type;
+ struct _fptr *first; /* first entry */
+ struct _fptr *next; /* next file in directory */
+} FDSC;
+
+extern FDSC *fp_root;
+
+char *file_name(unsigned char *fixed);
+
+/* Returns a pointer to a pretty-printed representation of a fixed MS-DOS file
+ name. */
+
+int file_cvt(unsigned char *name, unsigned char *fixed);
+
+/* Converts a pretty-printed file name to the fixed MS-DOS format. Returns a
+ non-zero integer on success, zero on failure. */
+
+void file_add(char *path, FD_TYPE type);
+
+/* Define special attributes for a path. TYPE can be either FDT_DROP or
+ FDT_UNDELETE. */
+
+FDSC **file_cd(FDSC ** curr, char *fixed);
+
+/* Returns a pointer to the directory descriptor of the subdirectory FIXED of
+ CURR, or NULL if no such subdirectory exists. */
+
+FD_TYPE file_type(FDSC ** curr, char *fixed);
+
+/* Returns the attribute of the file FIXED in directory CURR or FDT_NONE if no
+ such file exists or if CURR is NULL. */
+
+void file_modify(FDSC ** curr, char *fixed);
+
+/* Performs the necessary operation on the entry of CURR that is named FIXED. */
+
+void file_unused(void);
+
+/* Displays warnings for all unused file attributes. */
+
+#endif
diff --git a/src/io.c b/src/io.c
new file mode 100644
index 0000000..d862fcf
--- /dev/null
+++ b/src/io.c
@@ -0,0 +1,231 @@
+/* io.c - Virtual disk input/output
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/*
+ * Thu Feb 26 01:15:36 CET 1998: Martin Schulze <joey@infodrom.north.de>
+ * Fixed nasty bug that caused every file with a name like
+ * xxxxxxxx.xxx to be treated as bad name that needed to be fixed.
+ */
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#define _LARGEFILE64_SOURCE
+#include <sys/types.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <linux/fd.h>
+
+#include "dosfsck.h"
+#include "common.h"
+#include "io.h"
+
+typedef struct _change {
+ void *data;
+ loff_t pos;
+ int size;
+ struct _change *next;
+} CHANGE;
+
+static CHANGE *changes, *last;
+static int fd, did_change = 0;
+
+unsigned device_no;
+
+#ifdef __DJGPP__
+#include "volume.h" /* DOS lowlevel disk access functions */
+loff_t llseek(int fd, loff_t offset, int whence)
+{
+ if ((whence != SEEK_SET) || (fd == 4711))
+ return -1; /* only those supported */
+ return VolumeSeek(offset);
+}
+
+#define open OpenVolume
+#define close CloseVolume
+#define read(a,b,c) ReadVolume(b,c)
+#define write(a,b,c) WriteVolume(b,c)
+#else
+loff_t llseek(int fd, loff_t offset, int whence)
+{
+ return (loff_t) lseek64(fd, (off64_t) offset, whence);
+}
+#endif
+
+void fs_open(char *path, int rw)
+{
+ struct stat stbuf;
+
+ if ((fd = open(path, rw ? O_RDWR : O_RDONLY)) < 0) {
+ perror("open");
+ exit(6);
+ }
+ changes = last = NULL;
+ did_change = 0;
+
+#ifndef _DJGPP_
+ if (fstat(fd, &stbuf) < 0)
+ pdie("fstat %s", path);
+ device_no = S_ISBLK(stbuf.st_mode) ? (stbuf.st_rdev >> 8) & 0xff : 0;
+#else
+ if (IsWorkingOnImageFile()) {
+ if (fstat(GetVolumeHandle(), &stbuf) < 0)
+ pdie("fstat image %s", path);
+ device_no = 0;
+ } else {
+ /* return 2 for floppy, 1 for ramdisk, 7 for loopback */
+ /* used by boot.c in Atari mode: floppy always FAT12, */
+ /* loopback / ramdisk only FAT12 if usual floppy size, */
+ /* harddisk always FAT16 on Atari... */
+ device_no = (GetVolumeHandle() < 2) ? 2 : 1;
+ /* telling "floppy" for A:/B:, "ramdisk" for the rest */
+ }
+#endif
+}
+
+/**
+ * Read data from the partition, accounting for any pending updates that are
+ * queued for writing.
+ *
+ * @param[in] pos Byte offset, relative to the beginning of the partition,
+ * at which to read
+ * @param[in] size Number of bytes to read
+ * @param[out] data Where to put the data read
+ */
+void fs_read(loff_t pos, int size, void *data)
+{
+ CHANGE *walk;
+ int got;
+
+ if (llseek(fd, pos, 0) != pos)
+ pdie("Seek to %lld", pos);
+ if ((got = read(fd, data, size)) < 0)
+ pdie("Read %d bytes at %lld", size, pos);
+ if (got != size)
+ die("Got %d bytes instead of %d at %lld", got, size, pos);
+ for (walk = changes; walk; walk = walk->next) {
+ if (walk->pos < pos + size && walk->pos + walk->size > pos) {
+ if (walk->pos < pos)
+ memcpy(data, (char *)walk->data + pos - walk->pos, min(size,
+ walk->size
+ - pos +
+ walk->pos));
+ else
+ memcpy((char *)data + walk->pos - pos, walk->data,
+ min(walk->size, size + pos - walk->pos));
+ }
+ }
+}
+
+int fs_test(loff_t pos, int size)
+{
+ void *scratch;
+ int okay;
+
+ if (llseek(fd, pos, 0) != pos)
+ pdie("Seek to %lld", pos);
+ scratch = alloc(size);
+ okay = read(fd, scratch, size) == size;
+ free(scratch);
+ return okay;
+}
+
+void fs_write(loff_t pos, int size, void *data)
+{
+ CHANGE *new;
+ int did;
+
+ if (write_immed) {
+ did_change = 1;
+ if (llseek(fd, pos, 0) != pos)
+ pdie("Seek to %lld", pos);
+ if ((did = write(fd, data, size)) == size)
+ return;
+ if (did < 0)
+ pdie("Write %d bytes at %lld", size, pos);
+ die("Wrote %d bytes instead of %d at %lld", did, size, pos);
+ }
+ new = alloc(sizeof(CHANGE));
+ new->pos = pos;
+ memcpy(new->data = alloc(new->size = size), data, size);
+ new->next = NULL;
+ if (last)
+ last->next = new;
+ else
+ changes = new;
+ last = new;
+}
+
+static void fs_flush(void)
+{
+ CHANGE *this;
+ int size;
+
+ while (changes) {
+ this = changes;
+ changes = changes->next;
+ if (llseek(fd, this->pos, 0) != this->pos)
+ fprintf(stderr,
+ "Seek to %lld failed: %s\n Did not write %d bytes.\n",
+ (long long)this->pos, strerror(errno), this->size);
+ else if ((size = write(fd, this->data, this->size)) < 0)
+ fprintf(stderr, "Writing %d bytes at %lld failed: %s\n", this->size,
+ (long long)this->pos, strerror(errno));
+ else if (size != this->size)
+ fprintf(stderr, "Wrote %d bytes instead of %d bytes at %lld."
+ "\n", size, this->size, (long long)this->pos);
+ free(this->data);
+ free(this);
+ }
+}
+
+int fs_close(int write)
+{
+ CHANGE *next;
+ int changed;
+
+ changed = ! !changes;
+ if (write)
+ fs_flush();
+ else
+ while (changes) {
+ next = changes->next;
+ free(changes->data);
+ free(changes);
+ changes = next;
+ }
+ if (close(fd) < 0)
+ pdie("closing file system");
+ return changed || did_change;
+}
+
+int fs_changed(void)
+{
+ return ! !changes || did_change;
+}
diff --git a/src/io.h b/src/io.h
new file mode 100644
index 0000000..45cb7d8
--- /dev/null
+++ b/src/io.h
@@ -0,0 +1,71 @@
+/* io.h - Virtual disk input/output
+
+ Copyright (C) 1993 Werner Almesberger <werner.almesberger@lrc.di.epfl.ch>
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* FAT32, VFAT, Atari format support, and various fixes additions May 1998
+ * by Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de> */
+
+#ifndef _IO_H
+#define _IO_H
+
+#include <sys/types.h> /* for loff_t */
+
+loff_t llseek(int fd, loff_t offset, int whence);
+
+/* lseek() analogue for large offsets. */
+
+void fs_open(char *path, int rw);
+
+/* Opens the file system PATH. If RW is zero, the file system is opened
+ read-only, otherwise, it is opened read-write. */
+
+void fs_read(loff_t pos, int size, void *data);
+
+/* Reads SIZE bytes starting at POS into DATA. Performs all applicable
+ changes. */
+
+int fs_test(loff_t pos, int size);
+
+/* Returns a non-zero integer if SIZE bytes starting at POS can be read without
+ errors. Otherwise, it returns zero. */
+
+void fs_write(loff_t pos, int size, void *data);
+
+/* If write_immed is non-zero, SIZE bytes are written from DATA to the disk,
+ starting at POS. If write_immed is zero, the change is added to a list in
+ memory. */
+
+int fs_close(int write);
+
+/* Closes the file system, performs all pending changes if WRITE is non-zero
+ and removes the list of changes. Returns a non-zero integer if the file
+ system has been changed since the last fs_open, zero otherwise. */
+
+int fs_changed(void);
+
+/* Determines whether the file system has changed. See fs_close. */
+
+extern unsigned device_no;
+
+/* Major number of device (0 if file) and size (in 512 byte sectors) */
+
+#endif
diff --git a/src/lfn.c b/src/lfn.c
new file mode 100644
index 0000000..4c4ec3e
--- /dev/null
+++ b/src/lfn.c
@@ -0,0 +1,524 @@
+/* lfn.c - Functions for handling VFAT long filenames
+
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+#include <time.h>
+
+#include "common.h"
+#include "io.h"
+#include "dosfsck.h"
+#include "lfn.h"
+#include "file.h"
+
+typedef struct {
+ __u8 id; /* sequence number for slot */
+ __u8 name0_4[10]; /* first 5 characters in name */
+ __u8 attr; /* attribute byte */
+ __u8 reserved; /* always 0 */
+ __u8 alias_checksum; /* checksum for 8.3 alias */
+ __u8 name5_10[12]; /* 6 more characters in name */
+ __u16 start; /* starting cluster number, 0 in long slots */
+ __u8 name11_12[4]; /* last 2 characters in name */
+} LFN_ENT;
+
+#define LFN_ID_START 0x40
+#define LFN_ID_SLOTMASK 0x1f
+
+#define CHARS_PER_LFN 13
+
+/* These modul-global vars represent the state of the LFN parser */
+unsigned char *lfn_unicode = NULL;
+unsigned char lfn_checksum;
+int lfn_slot = -1;
+loff_t *lfn_offsets = NULL;
+int lfn_parts = 0;
+
+static unsigned char fat_uni2esc[64] = {
+ '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', 'A', 'B', 'C', 'D', 'E', 'F',
+ 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N',
+ 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
+ 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd',
+ 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
+ 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
+ 'u', 'v', 'w', 'x', 'y', 'z', '+', '-'
+};
+
+/* This defines which unicode chars are directly convertable to ISO-8859-1 */
+#define UNICODE_CONVERTABLE(cl,ch) (ch == 0 && (cl < 0x80 || cl >= 0xa0))
+
+/* for maxlen param */
+#define UNTIL_0 INT_MAX
+
+/* Convert name part in 'lfn' from unicode to ASCII */
+#define CNV_THIS_PART(lfn) \
+ ({ \
+ unsigned char __part_uni[CHARS_PER_LFN*2]; \
+ copy_lfn_part( __part_uni, lfn ); \
+ cnv_unicode( __part_uni, CHARS_PER_LFN, 0 ); \
+ })
+
+/* Convert name parts collected so far (from previous slots) from unicode to
+ * ASCII */
+#define CNV_PARTS_SO_FAR() \
+ (cnv_unicode( lfn_unicode+(lfn_slot*CHARS_PER_LFN*2), \
+ lfn_parts*CHARS_PER_LFN, 0 ))
+
+#define BYTES_TO_WCHAR(cl,ch) ((wchar_t)((unsigned)(cl) + ((unsigned)(ch) << 8)))
+static size_t mbslen(wchar_t x)
+{
+ wchar_t wstr[] = { x, 0 };
+ return wcstombs(NULL, wstr, 0);
+}
+
+static size_t wctombs(char *dest, wchar_t x)
+{
+ wchar_t wstr[] = { x, 0 };
+ size_t size = wcstombs(NULL, wstr, 0);
+ if (size != (size_t) - 1)
+ size = wcstombs(dest, wstr, size + 1);
+ return size;
+}
+
+/* This function converts an unicode string to a normal ASCII string, assuming
+ * ISO-8859-1 charset. Characters not in 8859-1 are converted to the same
+ * escape notation as used by the kernel, i.e. the uuencode-like ":xxx" */
+static char *cnv_unicode(const unsigned char *uni, int maxlen, int use_q)
+{
+ const unsigned char *up;
+ unsigned char *out, *cp;
+ int len, val;
+ size_t x;
+
+ for (len = 0, up = uni; (up - uni) / 2 < maxlen && (up[0] || up[1]);
+ up += 2) {
+ if ((x = mbslen(BYTES_TO_WCHAR(up[0], up[1]))) != (size_t) - 1)
+ len += x;
+ else if (UNICODE_CONVERTABLE(up[0], up[1]))
+ ++len;
+ else
+ len += 4;
+ }
+ cp = out = use_q ? qalloc(&mem_queue, len + 1) : alloc(len + 1);
+
+ for (up = uni; (up - uni) / 2 < maxlen && (up[0] || up[1]); up += 2) {
+ if ((x = wctombs(cp, BYTES_TO_WCHAR(up[0], up[1]))) != (size_t) - 1)
+ cp += x;
+ else if (UNICODE_CONVERTABLE(up[0], up[1]))
+ *cp++ = up[0];
+ else {
+ /* here the same escape notation is used as in the Linux kernel */
+ *cp++ = ':';
+ val = (up[1] << 8) + up[0];
+ cp[2] = fat_uni2esc[val & 0x3f];
+ val >>= 6;
+ cp[1] = fat_uni2esc[val & 0x3f];
+ val >>= 6;
+ cp[0] = fat_uni2esc[val & 0x3f];
+ cp += 3;
+ }
+ }
+ *cp = 0;
+
+ return (char *)out;
+}
+
+static void copy_lfn_part(unsigned char *dst, LFN_ENT * lfn)
+{
+ memcpy(dst, lfn->name0_4, 10);
+ memcpy(dst + 10, lfn->name5_10, 12);
+ memcpy(dst + 22, lfn->name11_12, 4);
+}
+
+static void clear_lfn_slots(int start, int end)
+{
+ int i;
+ LFN_ENT empty;
+
+ /* New dir entry is zeroed except first byte, which is set to 0xe5.
+ * This is to avoid that some FAT-reading OSes (not Linux! ;) stop reading
+ * a directory at the first zero entry...
+ */
+ memset(&empty, 0, sizeof(empty));
+ empty.id = DELETED_FLAG;
+
+ for (i = start; i <= end; ++i) {
+ fs_write(lfn_offsets[i], sizeof(LFN_ENT), &empty);
+ }
+}
+
+void lfn_fix_checksum(loff_t from, loff_t to, const char *short_name)
+{
+ int i;
+ __u8 sum;
+ for (sum = 0, i = 0; i < 11; i++)
+ sum = (((sum & 1) << 7) | ((sum & 0xfe) >> 1)) + short_name[i];
+
+ for (; from < to; from += sizeof(LFN_ENT)) {
+ fs_write(from + offsetof(LFN_ENT, alias_checksum), sizeof(sum), &sum);
+ }
+}
+
+void lfn_reset(void)
+{
+ if (lfn_unicode)
+ free(lfn_unicode);
+ lfn_unicode = NULL;
+ if (lfn_offsets)
+ free(lfn_offsets);
+ lfn_offsets = NULL;
+ lfn_slot = -1;
+}
+
+/* This function is only called with de->attr == VFAT_LN_ATTR. It stores part
+ * of the long name. */
+void lfn_add_slot(DIR_ENT * de, loff_t dir_offset)
+{
+ LFN_ENT *lfn = (LFN_ENT *) de;
+ int slot = lfn->id & LFN_ID_SLOTMASK;
+ unsigned offset;
+
+ if (lfn_slot == 0)
+ lfn_check_orphaned();
+
+ if (de->attr != VFAT_LN_ATTR)
+ die("lfn_add_slot called with non-LFN directory entry");
+
+ if (lfn->id & LFN_ID_START && slot != 0) {
+ if (lfn_slot != -1) {
+ int can_clear = 0;
+ /* There is already a LFN "in progess", so it is an error that a
+ * new start entry is here. */
+ /* Causes: 1) if slot# == expected: start bit set mysteriously, 2)
+ * old LFN overwritten by new one */
+ /* Fixes: 1) delete previous LFN 2) if slot# == expected and
+ * checksum ok: clear start bit */
+ /* XXX: Should delay that until next LFN known (then can better
+ * display the name) */
+ printf("A new long file name starts within an old one.\n");
+ if (slot == lfn_slot && lfn->alias_checksum == lfn_checksum) {
+ char *part1 = CNV_THIS_PART(lfn);
+ char *part2 = CNV_PARTS_SO_FAR();
+ printf(" It could be that the LFN start bit is wrong here\n"
+ " if \"%s\" seems to match \"%s\".\n", part1, part2);
+ free(part1);
+ free(part2);
+ can_clear = 1;
+ }
+ if (interactive) {
+ printf("1: Delete previous LFN\n2: Leave it as it is.\n");
+ if (can_clear)
+ printf("3: Clear start bit and concatenate LFNs\n");
+ } else
+ printf(" Not auto-correcting this.\n");
+ if (interactive) {
+ switch (get_key(can_clear ? "123" : "12", "?")) {
+ case '1':
+ clear_lfn_slots(0, lfn_parts - 1);
+ lfn_reset();
+ break;
+ case '2':
+ break;
+ case '3':
+ lfn->id &= ~LFN_ID_START;
+ fs_write(dir_offset + offsetof(LFN_ENT, id),
+ sizeof(lfn->id), &lfn->id);
+ break;
+ }
+ }
+ }
+ lfn_slot = slot;
+ lfn_checksum = lfn->alias_checksum;
+ lfn_unicode = alloc((lfn_slot * CHARS_PER_LFN + 1) * 2);
+ lfn_offsets = alloc(lfn_slot * sizeof(loff_t));
+ lfn_parts = 0;
+ } else if (lfn_slot == -1 && slot != 0) {
+ /* No LFN in progress, but slot found; start bit missing */
+ /* Causes: 1) start bit got lost, 2) Previous slot with start bit got
+ * lost */
+ /* Fixes: 1) delete LFN, 2) set start bit */
+ char *part = CNV_THIS_PART(lfn);
+ printf("Long filename fragment \"%s\" found outside a LFN "
+ "sequence.\n (Maybe the start bit is missing on the "
+ "last fragment)\n", part);
+ if (interactive) {
+ printf("1: Delete fragment\n2: Leave it as it is.\n"
+ "3: Set start bit\n");
+ } else
+ printf(" Not auto-correcting this.\n");
+ switch (interactive ? get_key("123", "?") : '2') {
+ case '1':
+ if (!lfn_offsets)
+ lfn_offsets = alloc(sizeof(loff_t));
+ lfn_offsets[0] = dir_offset;
+ clear_lfn_slots(0, 0);
+ lfn_reset();
+ return;
+ case '2':
+ lfn_reset();
+ return;
+ case '3':
+ lfn->id |= LFN_ID_START;
+ fs_write(dir_offset + offsetof(LFN_ENT, id),
+ sizeof(lfn->id), &lfn->id);
+ lfn_slot = slot;
+ lfn_checksum = lfn->alias_checksum;
+ lfn_unicode = alloc((lfn_slot * CHARS_PER_LFN + 1) * 2);
+ lfn_offsets = alloc(lfn_slot * sizeof(loff_t));
+ lfn_parts = 0;
+ break;
+ }
+ } else if (slot != lfn_slot) {
+ /* wrong sequence number */
+ /* Causes: 1) seq-no destroyed */
+ /* Fixes: 1) delete LFN, 2) fix number (maybe only if following parts
+ * are ok?, maybe only if checksum is ok?) (Attention: space
+ * for name was allocated before!) */
+ int can_fix = 0;
+ printf("Unexpected long filename sequence number "
+ "(%d vs. expected %d).\n", slot, lfn_slot);
+ if (lfn->alias_checksum == lfn_checksum && lfn_slot > 0) {
+ char *part1 = CNV_THIS_PART(lfn);
+ char *part2 = CNV_PARTS_SO_FAR();
+ printf(" It could be that just the number is wrong\n"
+ " if \"%s\" seems to match \"%s\".\n", part1, part2);
+ free(part1);
+ free(part2);
+ can_fix = 1;
+ }
+ if (interactive) {
+ printf
+ ("1: Delete LFN\n2: Leave it as it is (and ignore LFN so far)\n");
+ if (can_fix)
+ printf("3: Correct sequence number\n");
+ } else
+ printf(" Not auto-correcting this.\n");
+ switch (interactive ? get_key(can_fix ? "123" : "12", "?") : '2') {
+ case '1':
+ if (!lfn_offsets) {
+ lfn_offsets = alloc(sizeof(loff_t));
+ lfn_parts = 0;
+ }
+ lfn_offsets[lfn_parts++] = dir_offset;
+ clear_lfn_slots(0, lfn_parts - 1);
+ lfn_reset();
+ return;
+ case '2':
+ lfn_reset();
+ return;
+ case '3':
+ lfn->id = (lfn->id & ~LFN_ID_SLOTMASK) | lfn_slot;
+ fs_write(dir_offset + offsetof(LFN_ENT, id),
+ sizeof(lfn->id), &lfn->id);
+ break;
+ }
+ }
+
+ if (lfn->alias_checksum != lfn_checksum) {
+ /* checksum mismatch */
+ /* Causes: 1) checksum field here destroyed */
+ /* Fixes: 1) delete LFN, 2) fix checksum */
+ printf("Checksum in long filename part wrong "
+ "(%02x vs. expected %02x).\n",
+ lfn->alias_checksum, lfn_checksum);
+ if (interactive) {
+ printf("1: Delete LFN\n2: Leave it as it is.\n"
+ "3: Correct checksum\n");
+ } else
+ printf(" Not auto-correcting this.\n");
+ if (interactive) {
+ switch (get_key("123", "?")) {
+ case '1':
+ lfn_offsets[lfn_parts++] = dir_offset;
+ clear_lfn_slots(0, lfn_parts - 1);
+ lfn_reset();
+ return;
+ case '2':
+ break;
+ case '3':
+ lfn->alias_checksum = lfn_checksum;
+ fs_write(dir_offset + offsetof(LFN_ENT, alias_checksum),
+ sizeof(lfn->alias_checksum), &lfn->alias_checksum);
+ break;
+ }
+ }
+ }
+
+ if (lfn_slot != -1) {
+ lfn_slot--;
+ offset = lfn_slot * CHARS_PER_LFN * 2;
+ copy_lfn_part(lfn_unicode + offset, lfn);
+ if (lfn->id & LFN_ID_START)
+ lfn_unicode[offset + 26] = lfn_unicode[offset + 27] = 0;
+ lfn_offsets[lfn_parts++] = dir_offset;
+ }
+
+ if (lfn->reserved != 0) {
+ printf("Reserved field in VFAT long filename slot is not 0 "
+ "(but 0x%02x).\n", lfn->reserved);
+ if (interactive)
+ printf("1: Fix.\n2: Leave it.\n");
+ else
+ printf("Auto-setting to 0.\n");
+ if (!interactive || get_key("12", "?") == '1') {
+ lfn->reserved = 0;
+ fs_write(dir_offset + offsetof(LFN_ENT, reserved),
+ sizeof(lfn->reserved), &lfn->reserved);
+ }
+ }
+ if (lfn->start != CT_LE_W(0)) {
+ printf("Start cluster field in VFAT long filename slot is not 0 "
+ "(but 0x%04x).\n", lfn->start);
+ if (interactive)
+ printf("1: Fix.\n2: Leave it.\n");
+ else
+ printf("Auto-setting to 0.\n");
+ if (!interactive || get_key("12", "?") == '1') {
+ lfn->start = CT_LE_W(0);
+ fs_write(dir_offset + offsetof(LFN_ENT, start),
+ sizeof(lfn->start), &lfn->start);
+ }
+ }
+}
+
+/* This function is always called when de->attr != VFAT_LN_ATTR is found, to
+ * retrieve the previously constructed LFN. */
+char *lfn_get(DIR_ENT * de, loff_t * lfn_offset)
+{
+ char *lfn;
+ __u8 sum;
+ int i;
+
+ *lfn_offset = 0;
+ if (de->attr == VFAT_LN_ATTR)
+ die("lfn_get called with LFN directory entry");
+
+#if 0
+ if (de->lcase)
+ printf("lcase=%02x\n", de->lcase);
+#endif
+
+ if (lfn_slot == -1)
+ /* no long name for this file */
+ return NULL;
+
+ if (lfn_slot != 0) {
+ /* The long name isn't finished yet. */
+ /* Causes: 1) LFN slot overwritten by non-VFAT aware tool */
+ /* Fixes: 1) delete LFN 2) move overwriting entry to somewhere else
+ * and let user enter missing part of LFN (hard to do :-()
+ * 3) renumber entries and truncate name */
+ char *long_name = CNV_PARTS_SO_FAR();
+ char *short_name = file_name(de->name);
+ printf("Unfinished long file name \"%s\".\n"
+ " (Start may have been overwritten by %s)\n",
+ long_name, short_name);
+ free(long_name);
+ if (interactive) {
+ printf("1: Delete LFN\n2: Leave it as it is.\n"
+ "3: Fix numbering (truncates long name and attaches "
+ "it to short name %s)\n", short_name);
+ } else
+ printf(" Not auto-correcting this.\n");
+ switch (interactive ? get_key("123", "?") : '2') {
+ case '1':
+ clear_lfn_slots(0, lfn_parts - 1);
+ lfn_reset();
+ return NULL;
+ case '2':
+ lfn_reset();
+ return NULL;
+ case '3':
+ for (i = 0; i < lfn_parts; ++i) {
+ __u8 id = (lfn_parts - i) | (i == 0 ? LFN_ID_START : 0);
+ fs_write(lfn_offsets[i] + offsetof(LFN_ENT, id),
+ sizeof(id), &id);
+ }
+ memmove(lfn_unicode, lfn_unicode + lfn_slot * CHARS_PER_LFN * 2,
+ lfn_parts * CHARS_PER_LFN * 2);
+ break;
+ }
+ }
+
+ for (sum = 0, i = 0; i < 11; i++)
+ sum = (((sum & 1) << 7) | ((sum & 0xfe) >> 1)) + de->name[i];
+ if (sum != lfn_checksum) {
+ /* checksum doesn't match, long name doesn't apply to this alias */
+ /* Causes: 1) alias renamed */
+ /* Fixes: 1) Fix checksum in LFN entries */
+ char *long_name = CNV_PARTS_SO_FAR();
+ char *short_name = file_name(de->name);
+ printf("Wrong checksum for long file name \"%s\".\n"
+ " (Short name %s may have changed without updating the long name)\n",
+ long_name, short_name);
+ free(long_name);
+ if (interactive) {
+ printf("1: Delete LFN\n2: Leave it as it is.\n"
+ "3: Fix checksum (attaches to short name %s)\n", short_name);
+ } else
+ printf(" Not auto-correcting this.\n");
+ if (interactive) {
+ switch (get_key("123", "?")) {
+ case '1':
+ clear_lfn_slots(0, lfn_parts - 1);
+ lfn_reset();
+ return NULL;
+ case '2':
+ lfn_reset();
+ return NULL;
+ case '3':
+ for (i = 0; i < lfn_parts; ++i) {
+ fs_write(lfn_offsets[i] + offsetof(LFN_ENT, alias_checksum),
+ sizeof(sum), &sum);
+ }
+ break;
+ }
+ }
+ }
+
+ *lfn_offset = lfn_offsets[0];
+ lfn = cnv_unicode(lfn_unicode, UNTIL_0, 1);
+ lfn_reset();
+ return (lfn);
+}
+
+void lfn_check_orphaned(void)
+{
+ char *long_name;
+
+ if (lfn_slot == -1)
+ return;
+
+ long_name = CNV_PARTS_SO_FAR();
+ printf("Orphaned long file name part \"%s\"\n", long_name);
+ if (interactive)
+ printf("1: Delete.\n2: Leave it.\n");
+ else
+ printf(" Auto-deleting.\n");
+ if (!interactive || get_key("12", "?") == '1') {
+ clear_lfn_slots(0, lfn_parts - 1);
+ }
+ lfn_reset();
+}
diff --git a/src/lfn.h b/src/lfn.h
new file mode 100644
index 0000000..41b08f3
--- /dev/null
+++ b/src/lfn.h
@@ -0,0 +1,39 @@
+/* lfn.h - Functions for handling VFAT long filenames
+
+ Copyright (C) 1998 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#ifndef _LFN_H
+#define _LFN_H
+
+void lfn_reset(void);
+/* Reset the state of the LFN parser. */
+
+void lfn_add_slot(DIR_ENT * de, loff_t dir_offset);
+/* Process a dir slot that is a VFAT LFN entry. */
+
+char *lfn_get(DIR_ENT * de, loff_t * lfn_offset);
+/* Retrieve the long name for the proper dir entry. */
+
+void lfn_check_orphaned(void);
+
+void lfn_fix_checksum(loff_t from, loff_t to, const char *short_name);
+
+#endif
diff --git a/src/mkdosfs.c b/src/mkdosfs.c
new file mode 100644
index 0000000..d7c94f5
--- /dev/null
+++ b/src/mkdosfs.c
@@ -0,0 +1,1734 @@
+/* mkdosfs.c - utility to create FAT/MS-DOS filesystems
+
+ Copyright (C) 1991 Linus Torvalds <torvalds@klaava.helsinki.fi>
+ Copyright (C) 1992-1993 Remy Card <card@masi.ibp.fr>
+ Copyright (C) 1993-1994 David Hudson <dave@humbug.demon.co.uk>
+ Copyright (C) 1998 H. Peter Anvin <hpa@zytor.com>
+ Copyright (C) 1998-2005 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+/* Description: Utility to allow an MS-DOS filesystem to be created
+ under Linux. A lot of the basic structure of this program has been
+ borrowed from Remy Card's "mke2fs" code.
+
+ As far as possible the aim here is to make the "mkdosfs" command
+ look almost identical to the other Linux filesystem make utilties,
+ eg bad blocks are still specified as blocks, not sectors, but when
+ it comes down to it, DOS is tied to the idea of a sector (512 bytes
+ as a rule), and not the block. For example the boot block does not
+ occupy a full cluster.
+
+ Fixes/additions May 1998 by Roman Hodek
+ <Roman.Hodek@informatik.uni-erlangen.de>:
+ - Atari format support
+ - New options -A, -S, -C
+ - Support for filesystems > 2GB
+ - FAT32 support */
+
+/* Include the header files */
+
+#include "version.h"
+
+#include <fcntl.h>
+#include <linux/hdreg.h>
+#include <sys/mount.h>
+#include <linux/fd.h>
+#include <endian.h>
+#include <mntent.h>
+#include <signal.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <time.h>
+#include <errno.h>
+#include <ctype.h>
+
+#include <asm/types.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+
+#include <asm/byteorder.h>
+#ifdef __le16_to_cpu
+/* ++roman: 2.1 kernel headers define these function, they're probably more
+ * efficient then coding the swaps machine-independently. */
+#define CF_LE_W __le16_to_cpu
+#define CF_LE_L __le32_to_cpu
+#define CT_LE_W __cpu_to_le16
+#define CT_LE_L __cpu_to_le32
+#else
+#define CF_LE_W(v) ((((v) & 0xff) << 8) | (((v) >> 8) & 0xff))
+#define CF_LE_L(v) (((unsigned)(v)>>24) | (((unsigned)(v)>>8)&0xff00) | \
+ (((unsigned)(v)<<8)&0xff0000) | ((unsigned)(v)<<24))
+#define CT_LE_W(v) CF_LE_W(v)
+#define CT_LE_L(v) CF_LE_L(v)
+#endif /* defined(__le16_to_cpu) */
+
+#else
+
+#define CF_LE_W(v) (v)
+#define CF_LE_L(v) (v)
+#define CT_LE_W(v) (v)
+#define CT_LE_L(v) (v)
+
+#endif /* __BIG_ENDIAN */
+
+/* In earlier versions, an own llseek() was used, but glibc lseek() is
+ * sufficient (or even better :) for 64 bit offsets in the meantime */
+#define llseek lseek
+
+/* Constant definitions */
+
+#define TRUE 1 /* Boolean constants */
+#define FALSE 0
+
+#define TEST_BUFFER_BLOCKS 16
+#define HARD_SECTOR_SIZE 512
+#define SECTORS_PER_BLOCK ( BLOCK_SIZE / HARD_SECTOR_SIZE )
+
+#define NO_NAME "NO NAME "
+
+/* Macro definitions */
+
+/* Report a failure message and return a failure error code */
+
+#define die( str ) fatal_error( "%s: " str "\n" )
+
+/* Mark a cluster in the FAT as bad */
+
+#define mark_sector_bad( sector ) mark_FAT_sector( sector, FAT_BAD )
+
+/* Compute ceil(a/b) */
+
+inline int cdiv(int a, int b)
+{
+ return (a + b - 1) / b;
+}
+
+/* MS-DOS filesystem structures -- I included them here instead of
+ including linux/msdos_fs.h since that doesn't include some fields we
+ need */
+
+#define ATTR_RO 1 /* read-only */
+#define ATTR_HIDDEN 2 /* hidden */
+#define ATTR_SYS 4 /* system */
+#define ATTR_VOLUME 8 /* volume label */
+#define ATTR_DIR 16 /* directory */
+#define ATTR_ARCH 32 /* archived */
+
+#define ATTR_NONE 0 /* no attribute bits */
+#define ATTR_UNUSED (ATTR_VOLUME | ATTR_ARCH | ATTR_SYS | ATTR_HIDDEN)
+ /* attribute bits that are copied "as is" */
+
+/* FAT values */
+#define FAT_EOF (atari_format ? 0x0fffffff : 0x0ffffff8)
+#define FAT_BAD 0x0ffffff7
+
+#define MSDOS_EXT_SIGN 0x29 /* extended boot sector signature */
+#define MSDOS_FAT12_SIGN "FAT12 " /* FAT12 filesystem signature */
+#define MSDOS_FAT16_SIGN "FAT16 " /* FAT16 filesystem signature */
+#define MSDOS_FAT32_SIGN "FAT32 " /* FAT32 filesystem signature */
+
+#define BOOT_SIGN 0xAA55 /* Boot sector magic number */
+
+#define MAX_CLUST_12 ((1 << 12) - 16)
+#define MAX_CLUST_16 ((1 << 16) - 16)
+#define MIN_CLUST_32 65529
+/* M$ says the high 4 bits of a FAT32 FAT entry are reserved and don't belong
+ * to the cluster number. So the max. cluster# is based on 2^28 */
+#define MAX_CLUST_32 ((1 << 28) - 16)
+
+#define FAT12_THRESHOLD 4085
+
+#define OLDGEMDOS_MAX_SECTORS 32765
+#define GEMDOS_MAX_SECTORS 65531
+#define GEMDOS_MAX_SECTOR_SIZE (16*1024)
+
+#define BOOTCODE_SIZE 448
+#define BOOTCODE_FAT32_SIZE 420
+
+/* __attribute__ ((packed)) is used on all structures to make gcc ignore any
+ * alignments */
+
+struct msdos_volume_info {
+ __u8 drive_number; /* BIOS drive number */
+ __u8 RESERVED; /* Unused */
+ __u8 ext_boot_sign; /* 0x29 if fields below exist (DOS 3.3+) */
+ __u8 volume_id[4]; /* Volume ID number */
+ __u8 volume_label[11]; /* Volume label */
+ __u8 fs_type[8]; /* Typically FAT12 or FAT16 */
+} __attribute__ ((packed));
+
+struct msdos_boot_sector {
+ __u8 boot_jump[3]; /* Boot strap short or near jump */
+ __u8 system_id[8]; /* Name - can be used to special case
+ partition manager volumes */
+ __u8 sector_size[2]; /* bytes per logical sector */
+ __u8 cluster_size; /* sectors/cluster */
+ __u16 reserved; /* reserved sectors */
+ __u8 fats; /* number of FATs */
+ __u8 dir_entries[2]; /* root directory entries */
+ __u8 sectors[2]; /* number of sectors */
+ __u8 media; /* media code (unused) */
+ __u16 fat_length; /* sectors/FAT */
+ __u16 secs_track; /* sectors per track */
+ __u16 heads; /* number of heads */
+ __u32 hidden; /* hidden sectors (unused) */
+ __u32 total_sect; /* number of sectors (if sectors == 0) */
+ union {
+ struct {
+ struct msdos_volume_info vi;
+ __u8 boot_code[BOOTCODE_SIZE];
+ } __attribute__ ((packed)) _oldfat;
+ struct {
+ __u32 fat32_length; /* sectors/FAT */
+ __u16 flags; /* bit 8: fat mirroring, low 4: active fat */
+ __u8 version[2]; /* major, minor filesystem version */
+ __u32 root_cluster; /* first cluster in root directory */
+ __u16 info_sector; /* filesystem info sector */
+ __u16 backup_boot; /* backup boot sector */
+ __u16 reserved2[6]; /* Unused */
+ struct msdos_volume_info vi;
+ __u8 boot_code[BOOTCODE_FAT32_SIZE];
+ } __attribute__ ((packed)) _fat32;
+ } __attribute__ ((packed)) fstype;
+ __u16 boot_sign;
+} __attribute__ ((packed));
+#define fat32 fstype._fat32
+#define oldfat fstype._oldfat
+
+struct fat32_fsinfo {
+ __u32 reserved1; /* Nothing as far as I can tell */
+ __u32 signature; /* 0x61417272L */
+ __u32 free_clusters; /* Free cluster count. -1 if unknown */
+ __u32 next_cluster; /* Most recently allocated cluster.
+ * Unused under Linux. */
+ __u32 reserved2[4];
+};
+
+struct msdos_dir_entry {
+ char name[8], ext[3]; /* name and extension */
+ __u8 attr; /* attribute bits */
+ __u8 lcase; /* Case for base and extension */
+ __u8 ctime_ms; /* Creation time, milliseconds */
+ __u16 ctime; /* Creation time */
+ __u16 cdate; /* Creation date */
+ __u16 adate; /* Last access date */
+ __u16 starthi; /* high 16 bits of first cl. (FAT32) */
+ __u16 time, date, start; /* time, date and first cluster */
+ __u32 size; /* file size (in bytes) */
+} __attribute__ ((packed));
+
+/* The "boot code" we put into the filesystem... it writes a message and
+ tells the user to try again */
+
+char dummy_boot_jump[3] = { 0xeb, 0x3c, 0x90 };
+
+char dummy_boot_jump_m68k[2] = { 0x60, 0x1c };
+
+#define MSG_OFFSET_OFFSET 3
+char dummy_boot_code[BOOTCODE_SIZE] = "\x0e" /* push cs */
+ "\x1f" /* pop ds */
+ "\xbe\x5b\x7c" /* mov si, offset message_txt */
+ /* write_msg: */
+ "\xac" /* lodsb */
+ "\x22\xc0" /* and al, al */
+ "\x74\x0b" /* jz key_press */
+ "\x56" /* push si */
+ "\xb4\x0e" /* mov ah, 0eh */
+ "\xbb\x07\x00" /* mov bx, 0007h */
+ "\xcd\x10" /* int 10h */
+ "\x5e" /* pop si */
+ "\xeb\xf0" /* jmp write_msg */
+ /* key_press: */
+ "\x32\xe4" /* xor ah, ah */
+ "\xcd\x16" /* int 16h */
+ "\xcd\x19" /* int 19h */
+ "\xeb\xfe" /* foo: jmp foo */
+ /* message_txt: */
+ "This is not a bootable disk. Please insert a bootable floppy and\r\n"
+ "press any key to try again ... \r\n";
+
+#define MESSAGE_OFFSET 29 /* Offset of message in above code */
+
+/* Global variables - the root of all evil :-) - see these and weep! */
+
+static char *program_name = "mkdosfs"; /* Name of the program */
+static char *device_name = NULL; /* Name of the device on which to create the filesystem */
+static int atari_format = 0; /* Use Atari variation of MS-DOS FS format */
+static int check = FALSE; /* Default to no readablity checking */
+static int verbose = 0; /* Default to verbose mode off */
+static long volume_id; /* Volume ID number */
+static time_t create_time; /* Creation time */
+static struct timeval create_timeval; /* Creation time */
+static char volume_name[] = NO_NAME; /* Volume name */
+static unsigned long long blocks; /* Number of blocks in filesystem */
+static int sector_size = 512; /* Size of a logical sector */
+static int sector_size_set = 0; /* User selected sector size */
+static int backup_boot = 0; /* Sector# of backup boot sector */
+static int reserved_sectors = 0; /* Number of reserved sectors */
+static int badblocks = 0; /* Number of bad blocks in the filesystem */
+static int nr_fats = 2; /* Default number of FATs to produce */
+static int size_fat = 0; /* Size in bits of FAT entries */
+static int size_fat_by_user = 0; /* 1 if FAT size user selected */
+static int dev = -1; /* FS block device file handle */
+static int ignore_full_disk = 0; /* Ignore warning about 'full' disk devices */
+static off_t currently_testing = 0; /* Block currently being tested (if autodetect bad blocks) */
+static struct msdos_boot_sector bs; /* Boot sector data */
+static int start_data_sector; /* Sector number for the start of the data area */
+static int start_data_block; /* Block number for the start of the data area */
+static unsigned char *fat; /* File allocation table */
+static unsigned alloced_fat_length; /* # of FAT sectors we can keep in memory */
+static unsigned char *info_sector; /* FAT32 info sector */
+static struct msdos_dir_entry *root_dir; /* Root directory */
+static int size_root_dir; /* Size of the root directory in bytes */
+static int sectors_per_cluster = 0; /* Number of sectors per disk cluster */
+static int root_dir_entries = 0; /* Number of root directory entries */
+static char *blank_sector; /* Blank sector - all zeros */
+static int hidden_sectors = 0; /* Number of hidden sectors */
+static int malloc_entire_fat = FALSE; /* Whether we should malloc() the entire FAT or not */
+static int align_structures = TRUE; /* Whether to enforce alignment */
+static int orphaned_sectors = 0; /* Sectors that exist in the last block of filesystem */
+
+/* Function prototype definitions */
+
+static void fatal_error(const char *fmt_string) __attribute__ ((noreturn));
+static void mark_FAT_cluster(int cluster, unsigned int value);
+static void mark_FAT_sector(int sector, unsigned int value);
+static long do_check(char *buffer, int try, off_t current_block);
+static void alarm_intr(int alnum);
+static void check_blocks(void);
+static void get_list_blocks(char *filename);
+static int valid_offset(int fd, loff_t offset);
+static unsigned long long count_blocks(char *filename, int *remainder);
+static void check_mount(char *device_name);
+static void establish_params(int device_num, int size);
+static void setup_tables(void);
+static void write_tables(void);
+
+/* The function implementations */
+
+/* Handle the reporting of fatal errors. Volatile to let gcc know that this doesn't return */
+
+static void fatal_error(const char *fmt_string)
+{
+ fprintf(stderr, fmt_string, program_name, device_name);
+ exit(1); /* The error exit code is 1! */
+}
+
+/* Mark the specified cluster as having a particular value */
+
+static void mark_FAT_cluster(int cluster, unsigned int value)
+{
+ switch (size_fat) {
+ case 12:
+ value &= 0x0fff;
+ if (((cluster * 3) & 0x1) == 0) {
+ fat[3 * cluster / 2] = (unsigned char)(value & 0x00ff);
+ fat[(3 * cluster / 2) + 1] =
+ (unsigned char)((fat[(3 * cluster / 2) + 1] & 0x00f0)
+ | ((value & 0x0f00) >> 8));
+ } else {
+ fat[3 * cluster / 2] =
+ (unsigned char)((fat[3 * cluster / 2] & 0x000f) |
+ ((value & 0x000f) << 4));
+ fat[(3 * cluster / 2) + 1] = (unsigned char)((value & 0x0ff0) >> 4);
+ }
+ break;
+
+ case 16:
+ value &= 0xffff;
+ fat[2 * cluster] = (unsigned char)(value & 0x00ff);
+ fat[(2 * cluster) + 1] = (unsigned char)(value >> 8);
+ break;
+
+ case 32:
+ value &= 0xfffffff;
+ fat[4 * cluster] = (unsigned char)(value & 0x000000ff);
+ fat[(4 * cluster) + 1] = (unsigned char)((value & 0x0000ff00) >> 8);
+ fat[(4 * cluster) + 2] = (unsigned char)((value & 0x00ff0000) >> 16);
+ fat[(4 * cluster) + 3] = (unsigned char)((value & 0xff000000) >> 24);
+ break;
+
+ default:
+ die("Bad FAT size (not 12, 16, or 32)");
+ }
+}
+
+/* Mark a specified sector as having a particular value in it's FAT entry */
+
+static void mark_FAT_sector(int sector, unsigned int value)
+{
+ int cluster;
+
+ cluster = (sector - start_data_sector) / (int)(bs.cluster_size) /
+ (sector_size / HARD_SECTOR_SIZE);
+ if (cluster < 0)
+ die("Invalid cluster number in mark_FAT_sector: probably bug!");
+
+ mark_FAT_cluster(cluster, value);
+}
+
+/* Perform a test on a block. Return the number of blocks that could be read successfully */
+
+static long do_check(char *buffer, int try, off_t current_block)
+{
+ long got;
+
+ if (llseek(dev, current_block * BLOCK_SIZE, SEEK_SET) /* Seek to the correct location */
+ !=current_block * BLOCK_SIZE)
+ die("seek failed during testing for blocks");
+
+ got = read(dev, buffer, try * BLOCK_SIZE); /* Try reading! */
+ if (got < 0)
+ got = 0;
+
+ if (got & (BLOCK_SIZE - 1))
+ printf("Unexpected values in do_check: probably bugs\n");
+ got /= BLOCK_SIZE;
+
+ return got;
+}
+
+/* Alarm clock handler - display the status of the quest for bad blocks! Then retrigger the alarm for five senconds
+ later (so we can come here again) */
+
+static void alarm_intr(int alnum)
+{
+ if (currently_testing >= blocks)
+ return;
+
+ signal(SIGALRM, alarm_intr);
+ alarm(5);
+ if (!currently_testing)
+ return;
+
+ printf("%lld... ", (unsigned long long)currently_testing);
+ fflush(stdout);
+}
+
+static void check_blocks(void)
+{
+ int try, got;
+ int i;
+ static char blkbuf[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
+
+ if (verbose) {
+ printf("Searching for bad blocks ");
+ fflush(stdout);
+ }
+ currently_testing = 0;
+ if (verbose) {
+ signal(SIGALRM, alarm_intr);
+ alarm(5);
+ }
+ try = TEST_BUFFER_BLOCKS;
+ while (currently_testing < blocks) {
+ if (currently_testing + try > blocks)
+ try = blocks - currently_testing;
+ got = do_check(blkbuf, try, currently_testing);
+ currently_testing += got;
+ if (got == try) {
+ try = TEST_BUFFER_BLOCKS;
+ continue;
+ } else
+ try = 1;
+ if (currently_testing < start_data_block)
+ die("bad blocks before data-area: cannot make fs");
+
+ for (i = 0; i < SECTORS_PER_BLOCK; i++) /* Mark all of the sectors in the block as bad */
+ mark_sector_bad(currently_testing * SECTORS_PER_BLOCK + i);
+ badblocks++;
+ currently_testing++;
+ }
+
+ if (verbose)
+ printf("\n");
+
+ if (badblocks)
+ printf("%d bad block%s\n", badblocks, (badblocks > 1) ? "s" : "");
+}
+
+static void get_list_blocks(char *filename)
+{
+ int i;
+ FILE *listfile;
+ unsigned long blockno;
+
+ listfile = fopen(filename, "r");
+ if (listfile == (FILE *) NULL)
+ die("Can't open file of bad blocks");
+
+ while (!feof(listfile)) {
+ fscanf(listfile, "%ld\n", &blockno);
+ for (i = 0; i < SECTORS_PER_BLOCK; i++) /* Mark all of the sectors in the block as bad */
+ mark_sector_bad(blockno * SECTORS_PER_BLOCK + i);
+ badblocks++;
+ }
+ fclose(listfile);
+
+ if (badblocks)
+ printf("%d bad block%s\n", badblocks, (badblocks > 1) ? "s" : "");
+}
+
+/* Given a file descriptor and an offset, check whether the offset is a valid offset for the file - return FALSE if it
+ isn't valid or TRUE if it is */
+
+static int valid_offset(int fd, loff_t offset)
+{
+ char ch;
+
+ if (llseek(fd, offset, SEEK_SET) < 0)
+ return FALSE;
+ if (read(fd, &ch, 1) < 1)
+ return FALSE;
+ return TRUE;
+}
+
+/* Given a filename, look to see how many blocks of BLOCK_SIZE are present, returning the answer */
+
+static unsigned long long count_blocks(char *filename, int *remainder)
+
+{
+ loff_t high, low;
+ int fd;
+
+ if ((fd = open(filename, O_RDONLY)) < 0) {
+ perror(filename);
+ exit(1);
+ }
+
+ /* first try SEEK_END, which should work on most devices nowadays */
+ if ((low = llseek(fd, 0, SEEK_END)) <= 0) {
+ low = 0;
+ for (high = 1; valid_offset(fd, high); high *= 2)
+ low = high;
+ while (low < high - 1) {
+ const loff_t mid = (low + high) / 2;
+ if (valid_offset(fd, mid))
+ low = mid;
+ else
+ high = mid;
+ }
+ ++low;
+ }
+
+ close(fd);
+ *remainder = (low%BLOCK_SIZE)/sector_size;
+ return(low / BLOCK_SIZE);
+}
+
+/* Check to see if the specified device is currently mounted - abort if it is */
+
+static void check_mount(char *device_name)
+{
+ FILE *f;
+ struct mntent *mnt;
+
+ if ((f = setmntent(MOUNTED, "r")) == NULL)
+ return;
+ while ((mnt = getmntent(f)) != NULL)
+ if (strcmp(device_name, mnt->mnt_fsname) == 0)
+ die("%s contains a mounted file system.");
+ endmntent(f);
+}
+
+/* Establish the geometry and media parameters for the device */
+
+static void establish_params(int device_num, int size)
+{
+ long loop_size;
+ struct hd_geometry geometry;
+ struct floppy_struct param;
+ int def_root_dir_entries = 512;
+
+ if ((0 == device_num) || ((device_num & 0xff00) == 0x0200))
+ /* file image or floppy disk */
+ {
+ if (0 == device_num) {
+ param.size = size / 512;
+ switch (param.size) {
+ case 720:
+ param.sect = 9;
+ param.head = 2;
+ break;
+ case 1440:
+ param.sect = 9;
+ param.head = 2;
+ break;
+ case 2400:
+ param.sect = 15;
+ param.head = 2;
+ break;
+ case 2880:
+ param.sect = 18;
+ param.head = 2;
+ break;
+ case 5760:
+ param.sect = 36;
+ param.head = 2;
+ break;
+ default:
+ /* fake values */
+ param.sect = 32;
+ param.head = 64;
+ break;
+ }
+
+ } else { /* is a floppy diskette */
+
+ if (ioctl(dev, FDGETPRM, &param)) /* Can we get the diskette geometry? */
+ die("unable to get diskette geometry for '%s'");
+ }
+ bs.secs_track = CT_LE_W(param.sect); /* Set up the geometry information */
+ bs.heads = CT_LE_W(param.head);
+ switch (param.size) { /* Set up the media descriptor byte */
+ case 720: /* 5.25", 2, 9, 40 - 360K */
+ bs.media = (char)0xfd;
+ bs.cluster_size = (char)2;
+ def_root_dir_entries = 112;
+ break;
+
+ case 1440: /* 3.5", 2, 9, 80 - 720K */
+ bs.media = (char)0xf9;
+ bs.cluster_size = (char)2;
+ def_root_dir_entries = 112;
+ break;
+
+ case 2400: /* 5.25", 2, 15, 80 - 1200K */
+ bs.media = (char)0xf9;
+ bs.cluster_size = (char)(atari_format ? 2 : 1);
+ def_root_dir_entries = 224;
+ break;
+
+ case 5760: /* 3.5", 2, 36, 80 - 2880K */
+ bs.media = (char)0xf0;
+ bs.cluster_size = (char)2;
+ def_root_dir_entries = 224;
+ break;
+
+ case 2880: /* 3.5", 2, 18, 80 - 1440K */
+floppy_default:
+ bs.media = (char)0xf0;
+ bs.cluster_size = (char)(atari_format ? 2 : 1);
+ def_root_dir_entries = 224;
+ break;
+
+ default: /* Anything else */
+ if (0 == device_num)
+ goto def_hd_params;
+ else
+ goto floppy_default;
+ }
+ } else if ((device_num & 0xff00) == 0x0700) { /* This is a loop device */
+ if (ioctl(dev, BLKGETSIZE, &loop_size))
+ die("unable to get loop device size");
+
+ switch (loop_size) { /* Assuming the loop device -> floppy later */
+ case 720: /* 5.25", 2, 9, 40 - 360K */
+ bs.secs_track = CF_LE_W(9);
+ bs.heads = CF_LE_W(2);
+ bs.media = (char)0xfd;
+ bs.cluster_size = (char)2;
+ def_root_dir_entries = 112;
+ break;
+
+ case 1440: /* 3.5", 2, 9, 80 - 720K */
+ bs.secs_track = CF_LE_W(9);
+ bs.heads = CF_LE_W(2);
+ bs.media = (char)0xf9;
+ bs.cluster_size = (char)2;
+ def_root_dir_entries = 112;
+ break;
+
+ case 2400: /* 5.25", 2, 15, 80 - 1200K */
+ bs.secs_track = CF_LE_W(15);
+ bs.heads = CF_LE_W(2);
+ bs.media = (char)0xf9;
+ bs.cluster_size = (char)(atari_format ? 2 : 1);
+ def_root_dir_entries = 224;
+ break;
+
+ case 5760: /* 3.5", 2, 36, 80 - 2880K */
+ bs.secs_track = CF_LE_W(36);
+ bs.heads = CF_LE_W(2);
+ bs.media = (char)0xf0;
+ bs.cluster_size = (char)2;
+ bs.dir_entries[0] = (char)224;
+ bs.dir_entries[1] = (char)0;
+ break;
+
+ case 2880: /* 3.5", 2, 18, 80 - 1440K */
+ bs.secs_track = CF_LE_W(18);
+ bs.heads = CF_LE_W(2);
+ bs.media = (char)0xf0;
+ bs.cluster_size = (char)(atari_format ? 2 : 1);
+ def_root_dir_entries = 224;
+ break;
+
+ default: /* Anything else: default hd setup */
+ printf("Loop device does not match a floppy size, using "
+ "default hd params\n");
+ bs.secs_track = CT_LE_W(32); /* these are fake values... */
+ bs.heads = CT_LE_W(64);
+ goto def_hd_params;
+ }
+ } else
+ /* Must be a hard disk then! */
+ {
+ /* Can we get the drive geometry? (Note I'm not too sure about */
+ /* whether to use HDIO_GETGEO or HDIO_REQ) */
+ if (ioctl(dev, HDIO_GETGEO, &geometry) || geometry.sectors == 0
+ || geometry.heads == 0) {
+ printf("unable to get drive geometry, using default 255/63\n");
+ bs.secs_track = CT_LE_W(63);
+ bs.heads = CT_LE_W(255);
+ } else {
+ bs.secs_track = CT_LE_W(geometry.sectors); /* Set up the geometry information */
+ bs.heads = CT_LE_W(geometry.heads);
+ }
+def_hd_params:
+ bs.media = (char)0xf8; /* Set up the media descriptor for a hard drive */
+ if (!size_fat && blocks * SECTORS_PER_BLOCK > 1064960) {
+ if (verbose)
+ printf("Auto-selecting FAT32 for large filesystem\n");
+ size_fat = 32;
+ }
+ if (size_fat == 32) {
+ /* For FAT32, try to do the same as M$'s format command
+ * (see http://www.win.tue.nl/~aeb/linux/fs/fat/fatgen103.pdf p. 20):
+ * fs size <= 260M: 0.5k clusters
+ * fs size <= 8G: 4k clusters
+ * fs size <= 16G: 8k clusters
+ * fs size > 16G: 16k clusters
+ */
+ unsigned long sz_mb =
+ (blocks + (1 << (20 - BLOCK_SIZE_BITS)) - 1) >> (20 -
+ BLOCK_SIZE_BITS);
+ bs.cluster_size =
+ sz_mb > 16 * 1024 ? 32 : sz_mb > 8 * 1024 ? 16 : sz_mb >
+ 260 ? 8 : 1;
+ } else {
+ /* FAT12 and FAT16: start at 4 sectors per cluster */
+ bs.cluster_size = (char)4;
+ }
+ }
+
+ if (!root_dir_entries)
+ root_dir_entries = def_root_dir_entries;
+}
+
+/*
+ * If alignment is enabled, round the first argument up to the second; the
+ * latter must be a power of two.
+ */
+static unsigned int align_object(unsigned int sectors, unsigned int clustsize)
+{
+ if (align_structures)
+ return (sectors + clustsize - 1) & ~(clustsize - 1);
+ else
+ return sectors;
+}
+
+/* Create the filesystem data tables */
+
+static void setup_tables(void)
+{
+ unsigned num_sectors;
+ unsigned cluster_count = 0, fat_length;
+ struct tm *ctime;
+ struct msdos_volume_info *vi =
+ (size_fat == 32 ? &bs.fat32.vi : &bs.oldfat.vi);
+
+ if (atari_format)
+ /* On Atari, the first few bytes of the boot sector are assigned
+ * differently: The jump code is only 2 bytes (and m68k machine code
+ * :-), then 6 bytes filler (ignored), then 3 byte serial number. */
+ memcpy(bs.system_id - 1, "mkdosf", 6);
+ else
+ strcpy((char *)bs.system_id, "mkdosfs");
+ if (sectors_per_cluster)
+ bs.cluster_size = (char)sectors_per_cluster;
+ if (size_fat == 32) {
+ /* Under FAT32, the root dir is in a cluster chain, and this is
+ * signalled by bs.dir_entries being 0. */
+ root_dir_entries = 0;
+ }
+
+ if (atari_format) {
+ bs.system_id[5] = (unsigned char)(volume_id & 0x000000ff);
+ bs.system_id[6] = (unsigned char)((volume_id & 0x0000ff00) >> 8);
+ bs.system_id[7] = (unsigned char)((volume_id & 0x00ff0000) >> 16);
+ } else {
+ vi->volume_id[0] = (unsigned char)(volume_id & 0x000000ff);
+ vi->volume_id[1] = (unsigned char)((volume_id & 0x0000ff00) >> 8);
+ vi->volume_id[2] = (unsigned char)((volume_id & 0x00ff0000) >> 16);
+ vi->volume_id[3] = (unsigned char)(volume_id >> 24);
+ }
+
+ if (!atari_format) {
+ memcpy(vi->volume_label, volume_name, 11);
+
+ memcpy(bs.boot_jump, dummy_boot_jump, 3);
+ /* Patch in the correct offset to the boot code */
+ bs.boot_jump[1] = ((size_fat == 32 ?
+ (char *)&bs.fat32.boot_code :
+ (char *)&bs.oldfat.boot_code) - (char *)&bs) - 2;
+
+ if (size_fat == 32) {
+ int offset = (char *)&bs.fat32.boot_code -
+ (char *)&bs + MESSAGE_OFFSET + 0x7c00;
+ if (dummy_boot_code[BOOTCODE_FAT32_SIZE - 1])
+ printf("Warning: message too long; truncated\n");
+ dummy_boot_code[BOOTCODE_FAT32_SIZE - 1] = 0;
+ memcpy(bs.fat32.boot_code, dummy_boot_code, BOOTCODE_FAT32_SIZE);
+ bs.fat32.boot_code[MSG_OFFSET_OFFSET] = offset & 0xff;
+ bs.fat32.boot_code[MSG_OFFSET_OFFSET + 1] = offset >> 8;
+ } else {
+ memcpy(bs.oldfat.boot_code, dummy_boot_code, BOOTCODE_SIZE);
+ }
+ bs.boot_sign = CT_LE_W(BOOT_SIGN);
+ } else {
+ memcpy(bs.boot_jump, dummy_boot_jump_m68k, 2);
+ }
+ if (verbose >= 2)
+ printf("Boot jump code is %02x %02x\n",
+ bs.boot_jump[0], bs.boot_jump[1]);
+
+ if (!reserved_sectors)
+ reserved_sectors = (size_fat == 32) ? 32 : 1;
+ else {
+ if (size_fat == 32 && reserved_sectors < 2)
+ die("On FAT32 at least 2 reserved sectors are needed.");
+ }
+ bs.reserved = CT_LE_W(reserved_sectors);
+ if (verbose >= 2)
+ printf("Using %d reserved sectors\n", reserved_sectors);
+ bs.fats = (char)nr_fats;
+ if (!atari_format || size_fat == 32)
+ bs.hidden = CT_LE_L(hidden_sectors);
+ else {
+ /* In Atari format, hidden is a 16 bit field */
+ __u16 hidden = CT_LE_W(hidden_sectors);
+ if (hidden_sectors & ~0xffff)
+ die("#hidden doesn't fit in 16bit field of Atari format\n");
+ memcpy(&bs.hidden, &hidden, 2);
+ }
+
+ num_sectors = (long long)(blocks *BLOCK_SIZE / sector_size)+orphaned_sectors;
+
+ if (!atari_format) {
+ unsigned fatdata1216; /* Sectors for FATs + data area (FAT12/16) */
+ unsigned fatdata32; /* Sectors for FATs + data area (FAT32) */
+ unsigned fatlength12, fatlength16, fatlength32;
+ unsigned maxclust12, maxclust16, maxclust32;
+ unsigned clust12, clust16, clust32;
+ int maxclustsize;
+ unsigned root_dir_sectors = cdiv(root_dir_entries * 32, sector_size);
+
+ /*
+ * If the filesystem is 8192 sectors or less (4 MB with 512-byte
+ * sectors, i.e. floppy size), don't align the data structures.
+ */
+ if (num_sectors <= 8192) {
+ if (align_structures && verbose >= 2)
+ printf("Disabling alignment due to tiny filesystem\n");
+
+ align_structures = FALSE;
+ }
+
+ if (sectors_per_cluster)
+ bs.cluster_size = maxclustsize = sectors_per_cluster;
+ else
+ /* An initial guess for bs.cluster_size should already be set */
+ maxclustsize = 128;
+
+ do {
+ fatdata32 = num_sectors
+ - align_object(reserved_sectors, bs.cluster_size);
+ fatdata1216 = fatdata32
+ - align_object(root_dir_sectors, bs.cluster_size);
+
+ if (verbose >= 2)
+ printf("Trying with %d sectors/cluster:\n", bs.cluster_size);
+
+ /* The factor 2 below avoids cut-off errors for nr_fats == 1.
+ * The "nr_fats*3" is for the reserved first two FAT entries */
+ clust12 = 2 * ((long long)fatdata1216 * sector_size + nr_fats * 3) /
+ (2 * (int)bs.cluster_size * sector_size + nr_fats * 3);
+ fatlength12 = cdiv(((clust12 + 2) * 3 + 1) >> 1, sector_size);
+ fatlength12 = align_object(fatlength12, bs.cluster_size);
+ /* Need to recalculate number of clusters, since the unused parts of the
+ * FATS and data area together could make up space for an additional,
+ * not really present cluster. */
+ clust12 = (fatdata1216 - nr_fats * fatlength12) / bs.cluster_size;
+ maxclust12 = (fatlength12 * 2 * sector_size) / 3;
+ if (maxclust12 > MAX_CLUST_12)
+ maxclust12 = MAX_CLUST_12;
+ if (verbose >= 2)
+ printf("FAT12: #clu=%u, fatlen=%u, maxclu=%u, limit=%u\n",
+ clust12, fatlength12, maxclust12, MAX_CLUST_12);
+ if (clust12 > maxclust12 - 2) {
+ clust12 = 0;
+ if (verbose >= 2)
+ printf("FAT12: too much clusters\n");
+ }
+
+ clust16 = ((long long)fatdata1216 * sector_size + nr_fats * 4) /
+ ((int)bs.cluster_size * sector_size + nr_fats * 2);
+ fatlength16 = cdiv((clust16 + 2) * 2, sector_size);
+ fatlength16 = align_object(fatlength16, bs.cluster_size);
+ /* Need to recalculate number of clusters, since the unused parts of the
+ * FATS and data area together could make up space for an additional,
+ * not really present cluster. */
+ clust16 = (fatdata1216 - nr_fats * fatlength16) / bs.cluster_size;
+ maxclust16 = (fatlength16 * sector_size) / 2;
+ if (maxclust16 > MAX_CLUST_16)
+ maxclust16 = MAX_CLUST_16;
+ if (verbose >= 2)
+ printf("FAT16: #clu=%u, fatlen=%u, maxclu=%u, limit=%u\n",
+ clust16, fatlength16, maxclust16, MAX_CLUST_16);
+ if (clust16 > maxclust16 - 2) {
+ if (verbose >= 2)
+ printf("FAT16: too much clusters\n");
+ clust16 = 0;
+ }
+ /* The < 4078 avoids that the filesystem will be misdetected as having a
+ * 12 bit FAT. */
+ if (clust16 < FAT12_THRESHOLD
+ && !(size_fat_by_user && size_fat == 16)) {
+ if (verbose >= 2)
+ printf(clust16 < FAT12_THRESHOLD ?
+ "FAT16: would be misdetected as FAT12\n" :
+ "FAT16: too much clusters\n");
+ clust16 = 0;
+ }
+
+ clust32 = ((long long)fatdata32 * sector_size + nr_fats * 8) /
+ ((int)bs.cluster_size * sector_size + nr_fats * 4);
+ fatlength32 = cdiv((clust32 + 2) * 4, sector_size);
+ fatlength32 = align_object(fatlength32, bs.cluster_size);
+ /* Need to recalculate number of clusters, since the unused parts of the
+ * FATS and data area together could make up space for an additional,
+ * not really present cluster. */
+ clust32 = (fatdata32 - nr_fats * fatlength32) / bs.cluster_size;
+ maxclust32 = (fatlength32 * sector_size) / 4;
+ if (maxclust32 > MAX_CLUST_32)
+ maxclust32 = MAX_CLUST_32;
+ if (clust32 && clust32 < MIN_CLUST_32
+ && !(size_fat_by_user && size_fat == 32)) {
+ clust32 = 0;
+ if (verbose >= 2)
+ printf("FAT32: not enough clusters (%d)\n", MIN_CLUST_32);
+ }
+ if (verbose >= 2)
+ printf("FAT32: #clu=%u, fatlen=%u, maxclu=%u, limit=%u\n",
+ clust32, fatlength32, maxclust32, MAX_CLUST_32);
+ if (clust32 > maxclust32) {
+ clust32 = 0;
+ if (verbose >= 2)
+ printf("FAT32: too much clusters\n");
+ }
+
+ if ((clust12 && (size_fat == 0 || size_fat == 12)) ||
+ (clust16 && (size_fat == 0 || size_fat == 16)) ||
+ (clust32 && size_fat == 32))
+ break;
+
+ bs.cluster_size <<= 1;
+ } while (bs.cluster_size && bs.cluster_size <= maxclustsize);
+
+ /* Use the optimal FAT size if not specified;
+ * FAT32 is (not yet) choosen automatically */
+ if (!size_fat) {
+ size_fat = (clust16 > clust12) ? 16 : 12;
+ if (verbose >= 2)
+ printf("Choosing %d bits for FAT\n", size_fat);
+ }
+
+ switch (size_fat) {
+ case 12:
+ cluster_count = clust12;
+ fat_length = fatlength12;
+ bs.fat_length = CT_LE_W(fatlength12);
+ memcpy(vi->fs_type, MSDOS_FAT12_SIGN, 8);
+ break;
+
+ case 16:
+ if (clust16 < FAT12_THRESHOLD) {
+ if (size_fat_by_user) {
+ fprintf(stderr, "WARNING: Not enough clusters for a "
+ "16 bit FAT! The filesystem will be\n"
+ "misinterpreted as having a 12 bit FAT without "
+ "mount option \"fat=16\".\n");
+ } else {
+ fprintf(stderr, "This filesystem has an unfortunate size. "
+ "A 12 bit FAT cannot provide\n"
+ "enough clusters, but a 16 bit FAT takes up a little "
+ "bit more space so that\n"
+ "the total number of clusters becomes less than the "
+ "threshold value for\n"
+ "distinction between 12 and 16 bit FATs.\n");
+ die("Make the file system a bit smaller manually.");
+ }
+ }
+ cluster_count = clust16;
+ fat_length = fatlength16;
+ bs.fat_length = CT_LE_W(fatlength16);
+ memcpy(vi->fs_type, MSDOS_FAT16_SIGN, 8);
+ break;
+
+ case 32:
+ if (clust32 < MIN_CLUST_32)
+ fprintf(stderr,
+ "WARNING: Not enough clusters for a 32 bit FAT!\n");
+ cluster_count = clust32;
+ fat_length = fatlength32;
+ bs.fat_length = CT_LE_W(0);
+ bs.fat32.fat32_length = CT_LE_L(fatlength32);
+ memcpy(vi->fs_type, MSDOS_FAT32_SIGN, 8);
+ root_dir_entries = 0;
+ break;
+
+ default:
+ die("FAT not 12, 16 or 32 bits");
+ }
+
+ /* Adjust the reserved number of sectors for alignment */
+ reserved_sectors = align_object(reserved_sectors, bs.cluster_size);
+ bs.reserved = CT_LE_W(reserved_sectors);
+
+ /* Adjust the number of root directory entries to help enforce alignment */
+ if (align_structures) {
+ root_dir_entries = align_object(root_dir_sectors, bs.cluster_size)
+ * (sector_size >> 5);
+ }
+ } else {
+ unsigned clusters, maxclust, fatdata;
+
+ /* GEMDOS always uses a 12 bit FAT on floppies, and always a 16 bit FAT on
+ * hard disks. So use 12 bit if the size of the file system suggests that
+ * this fs is for a floppy disk, if the user hasn't explicitly requested a
+ * size.
+ */
+ if (!size_fat)
+ size_fat = (num_sectors == 1440 || num_sectors == 2400 ||
+ num_sectors == 2880 || num_sectors == 5760) ? 12 : 16;
+ if (verbose >= 2)
+ printf("Choosing %d bits for FAT\n", size_fat);
+
+ /* Atari format: cluster size should be 2, except explicitly requested by
+ * the user, since GEMDOS doesn't like other cluster sizes very much.
+ * Instead, tune the sector size for the FS to fit.
+ */
+ bs.cluster_size = sectors_per_cluster ? sectors_per_cluster : 2;
+ if (!sector_size_set) {
+ while (num_sectors > GEMDOS_MAX_SECTORS) {
+ num_sectors >>= 1;
+ sector_size <<= 1;
+ }
+ }
+ if (verbose >= 2)
+ printf("Sector size must be %d to have less than %d log. sectors\n",
+ sector_size, GEMDOS_MAX_SECTORS);
+
+ /* Check if there are enough FAT indices for how much clusters we have */
+ do {
+ fatdata = num_sectors - cdiv(root_dir_entries * 32, sector_size) -
+ reserved_sectors;
+ /* The factor 2 below avoids cut-off errors for nr_fats == 1 and
+ * size_fat == 12
+ * The "2*nr_fats*size_fat/8" is for the reserved first two FAT entries
+ */
+ clusters =
+ (2 *
+ ((long long)fatdata * sector_size -
+ 2 * nr_fats * size_fat / 8)) / (2 * ((int)bs.cluster_size *
+ sector_size +
+ nr_fats * size_fat / 8));
+ fat_length = cdiv((clusters + 2) * size_fat / 8, sector_size);
+ /* Need to recalculate number of clusters, since the unused parts of the
+ * FATS and data area together could make up space for an additional,
+ * not really present cluster. */
+ clusters = (fatdata - nr_fats * fat_length) / bs.cluster_size;
+ maxclust = (fat_length * sector_size * 8) / size_fat;
+ if (verbose >= 2)
+ printf("ss=%d: #clu=%d, fat_len=%d, maxclu=%d\n",
+ sector_size, clusters, fat_length, maxclust);
+
+ /* last 10 cluster numbers are special (except FAT32: 4 high bits rsvd);
+ * first two numbers are reserved */
+ if (maxclust <=
+ (size_fat == 32 ? MAX_CLUST_32 : (1 << size_fat) - 0x10)
+ && clusters <= maxclust - 2)
+ break;
+ if (verbose >= 2)
+ printf(clusters > maxclust - 2 ?
+ "Too many clusters\n" : "FAT too big\n");
+
+ /* need to increment sector_size once more to */
+ if (sector_size_set)
+ die("With this sector size, the maximum number of FAT entries "
+ "would be exceeded.");
+ num_sectors >>= 1;
+ sector_size <<= 1;
+ } while (sector_size <= GEMDOS_MAX_SECTOR_SIZE);
+
+ if (sector_size > GEMDOS_MAX_SECTOR_SIZE)
+ die("Would need a sector size > 16k, which GEMDOS can't work with");
+
+ cluster_count = clusters;
+ if (size_fat != 32)
+ bs.fat_length = CT_LE_W(fat_length);
+ else {
+ bs.fat_length = 0;
+ bs.fat32.fat32_length = CT_LE_L(fat_length);
+ }
+ }
+
+ bs.sector_size[0] = (char)(sector_size & 0x00ff);
+ bs.sector_size[1] = (char)((sector_size & 0xff00) >> 8);
+
+ bs.dir_entries[0] = (char)(root_dir_entries & 0x00ff);
+ bs.dir_entries[1] = (char)((root_dir_entries & 0xff00) >> 8);
+
+ if (size_fat == 32) {
+ /* set up additional FAT32 fields */
+ bs.fat32.flags = CT_LE_W(0);
+ bs.fat32.version[0] = 0;
+ bs.fat32.version[1] = 0;
+ bs.fat32.root_cluster = CT_LE_L(2);
+ bs.fat32.info_sector = CT_LE_W(1);
+ if (!backup_boot)
+ backup_boot = (reserved_sectors >= 7) ? 6 :
+ (reserved_sectors >= 2) ? reserved_sectors - 1 : 0;
+ else {
+ if (backup_boot == 1)
+ die("Backup boot sector must be after sector 1");
+ else if (backup_boot >= reserved_sectors)
+ die("Backup boot sector must be a reserved sector");
+ }
+ if (verbose >= 2)
+ printf("Using sector %d as backup boot sector (0 = none)\n",
+ backup_boot);
+ bs.fat32.backup_boot = CT_LE_W(backup_boot);
+ memset(&bs.fat32.reserved2, 0, sizeof(bs.fat32.reserved2));
+ }
+
+ if (atari_format) {
+ /* Just some consistency checks */
+ if (num_sectors >= GEMDOS_MAX_SECTORS)
+ die("GEMDOS can't handle more than 65531 sectors");
+ else if (num_sectors >= OLDGEMDOS_MAX_SECTORS)
+ printf("Warning: More than 32765 sector need TOS 1.04 "
+ "or higher.\n");
+ }
+ if (num_sectors >= 65536) {
+ bs.sectors[0] = (char)0;
+ bs.sectors[1] = (char)0;
+ bs.total_sect = CT_LE_L(num_sectors);
+ } else {
+ bs.sectors[0] = (char)(num_sectors & 0x00ff);
+ bs.sectors[1] = (char)((num_sectors & 0xff00) >> 8);
+ if (!atari_format)
+ bs.total_sect = CT_LE_L(0);
+ }
+
+ if (!atari_format)
+ vi->ext_boot_sign = MSDOS_EXT_SIGN;
+
+ if (!cluster_count) {
+ if (sectors_per_cluster) /* If yes, die if we'd spec'd sectors per cluster */
+ die("Too many clusters for file system - try more sectors per cluster");
+ else
+ die("Attempting to create a too large file system");
+ }
+
+ /* The two following vars are in hard sectors, i.e. 512 byte sectors! */
+ start_data_sector = (reserved_sectors + nr_fats * fat_length) *
+ (sector_size / HARD_SECTOR_SIZE);
+ start_data_block = (start_data_sector + SECTORS_PER_BLOCK - 1) /
+ SECTORS_PER_BLOCK;
+
+ if (blocks < start_data_block + 32) /* Arbitrary undersize file system! */
+ die("Too few blocks for viable file system");
+
+ if (verbose) {
+ printf("%s has %d head%s and %d sector%s per track,\n",
+ device_name, CF_LE_W(bs.heads),
+ (CF_LE_W(bs.heads) != 1) ? "s" : "", CF_LE_W(bs.secs_track),
+ (CF_LE_W(bs.secs_track) != 1) ? "s" : "");
+ printf("logical sector size is %d,\n", sector_size);
+ printf("using 0x%02x media descriptor, with %d sectors;\n",
+ (int)(bs.media), num_sectors);
+ printf("file system has %d %d-bit FAT%s and %d sector%s per cluster.\n",
+ (int)(bs.fats), size_fat, (bs.fats != 1) ? "s" : "",
+ (int)(bs.cluster_size), (bs.cluster_size != 1) ? "s" : "");
+ printf("FAT size is %d sector%s, and provides %d cluster%s.\n",
+ fat_length, (fat_length != 1) ? "s" : "",
+ cluster_count, (cluster_count != 1) ? "s" : "");
+ printf("There %s %u reserved sector%s.\n",
+ (reserved_sectors != 1) ? "are" : "is",
+ reserved_sectors, (reserved_sectors != 1) ? "s" : "");
+
+ if (size_fat != 32) {
+ unsigned root_dir_entries =
+ bs.dir_entries[0] + ((bs.dir_entries[1]) * 256);
+ unsigned root_dir_sectors =
+ cdiv(root_dir_entries * 32, sector_size);
+ printf("Root directory contains %u slots and uses %u sectors.\n",
+ root_dir_entries, root_dir_sectors);
+ }
+ printf("Volume ID is %08lx, ", volume_id &
+ (atari_format ? 0x00ffffff : 0xffffffff));
+ if (strcmp(volume_name, NO_NAME))
+ printf("volume label %s.\n", volume_name);
+ else
+ printf("no volume label.\n");
+ }
+
+ /* Make the file allocation tables! */
+
+ if (malloc_entire_fat)
+ alloced_fat_length = fat_length;
+ else
+ alloced_fat_length = 1;
+
+ if ((fat =
+ (unsigned char *)malloc(alloced_fat_length * sector_size)) == NULL)
+ die("unable to allocate space for FAT image in memory");
+
+ memset(fat, 0, alloced_fat_length * sector_size);
+
+ mark_FAT_cluster(0, 0xffffffff); /* Initial fat entries */
+ mark_FAT_cluster(1, 0xffffffff);
+ fat[0] = (unsigned char)bs.media; /* Put media type in first byte! */
+ if (size_fat == 32) {
+ /* Mark cluster 2 as EOF (used for root dir) */
+ mark_FAT_cluster(2, FAT_EOF);
+ }
+
+ /* Make the root directory entries */
+
+ size_root_dir = (size_fat == 32) ?
+ bs.cluster_size * sector_size :
+ (((int)bs.dir_entries[1] * 256 + (int)bs.dir_entries[0]) *
+ sizeof(struct msdos_dir_entry));
+ if ((root_dir = (struct msdos_dir_entry *)malloc(size_root_dir)) == NULL) {
+ free(fat); /* Tidy up before we die! */
+ die("unable to allocate space for root directory in memory");
+ }
+
+ memset(root_dir, 0, size_root_dir);
+ if (memcmp(volume_name, NO_NAME, 11)) {
+ struct msdos_dir_entry *de = &root_dir[0];
+ memcpy(de->name, volume_name, 8);
+ memcpy(de->ext, volume_name + 8, 3);
+ de->attr = ATTR_VOLUME;
+ ctime = localtime(&create_time);
+ de->time = CT_LE_W((unsigned short)((ctime->tm_sec >> 1) +
+ (ctime->tm_min << 5) +
+ (ctime->tm_hour << 11)));
+ de->date =
+ CT_LE_W((unsigned short)(ctime->tm_mday +
+ ((ctime->tm_mon + 1) << 5) +
+ ((ctime->tm_year - 80) << 9)));
+ de->ctime_ms = 0;
+ de->ctime = de->time;
+ de->cdate = de->date;
+ de->adate = de->date;
+ de->starthi = CT_LE_W(0);
+ de->start = CT_LE_W(0);
+ de->size = CT_LE_L(0);
+ }
+
+ if (size_fat == 32) {
+ /* For FAT32, create an info sector */
+ struct fat32_fsinfo *info;
+
+ if (!(info_sector = malloc(sector_size)))
+ die("Out of memory");
+ memset(info_sector, 0, sector_size);
+ /* fsinfo structure is at offset 0x1e0 in info sector by observation */
+ info = (struct fat32_fsinfo *)(info_sector + 0x1e0);
+
+ /* Info sector magic */
+ info_sector[0] = 'R';
+ info_sector[1] = 'R';
+ info_sector[2] = 'a';
+ info_sector[3] = 'A';
+
+ /* Magic for fsinfo structure */
+ info->signature = CT_LE_L(0x61417272);
+ /* We've allocated cluster 2 for the root dir. */
+ info->free_clusters = CT_LE_L(cluster_count - 1);
+ info->next_cluster = CT_LE_L(2);
+
+ /* Info sector also must have boot sign */
+ *(__u16 *) (info_sector + 0x1fe) = CT_LE_W(BOOT_SIGN);
+ }
+
+ if (!(blank_sector = malloc(sector_size)))
+ die("Out of memory");
+ memset(blank_sector, 0, sector_size);
+}
+
+/* Write the new filesystem's data tables to wherever they're going to end up! */
+
+#define error(str) \
+ do { \
+ free (fat); \
+ if (info_sector) free (info_sector); \
+ free (root_dir); \
+ die (str); \
+ } while(0)
+
+#define seekto(pos,errstr) \
+ do { \
+ loff_t __pos = (pos); \
+ if (llseek (dev, __pos, SEEK_SET) != __pos) \
+ error ("seek to " errstr " failed whilst writing tables"); \
+ } while(0)
+
+#define writebuf(buf,size,errstr) \
+ do { \
+ int __size = (size); \
+ if (write (dev, buf, __size) != __size) \
+ error ("failed whilst writing " errstr); \
+ } while(0)
+
+static void write_tables(void)
+{
+ int x;
+ int fat_length;
+
+ fat_length = (size_fat == 32) ?
+ CF_LE_L(bs.fat32.fat32_length) : CF_LE_W(bs.fat_length);
+
+ seekto(0, "start of device");
+ /* clear all reserved sectors */
+ for (x = 0; x < reserved_sectors; ++x)
+ writebuf(blank_sector, sector_size, "reserved sector");
+ /* seek back to sector 0 and write the boot sector */
+ seekto(0, "boot sector");
+ writebuf((char *)&bs, sizeof(struct msdos_boot_sector), "boot sector");
+ /* on FAT32, write the info sector and backup boot sector */
+ if (size_fat == 32) {
+ seekto(CF_LE_W(bs.fat32.info_sector) * sector_size, "info sector");
+ writebuf(info_sector, 512, "info sector");
+ if (backup_boot != 0) {
+ seekto(backup_boot * sector_size, "backup boot sector");
+ writebuf((char *)&bs, sizeof(struct msdos_boot_sector),
+ "backup boot sector");
+ }
+ }
+ /* seek to start of FATS and write them all */
+ seekto(reserved_sectors * sector_size, "first FAT");
+ for (x = 1; x <= nr_fats; x++) {
+ int y;
+ int blank_fat_length = fat_length - alloced_fat_length;
+ writebuf(fat, alloced_fat_length * sector_size, "FAT");
+ for (y = 0; y < blank_fat_length; y++)
+ writebuf(blank_sector, sector_size, "FAT");
+ }
+ /* Write the root directory directly after the last FAT. This is the root
+ * dir area on FAT12/16, and the first cluster on FAT32. */
+ writebuf((char *)root_dir, size_root_dir, "root directory");
+
+ if (blank_sector)
+ free(blank_sector);
+ if (info_sector)
+ free(info_sector);
+ free(root_dir); /* Free up the root directory space from setup_tables */
+ free(fat); /* Free up the fat table space reserved during setup_tables */
+}
+
+/* Report the command usage and return a failure error code */
+
+void usage(void)
+{
+ fatal_error("\
+Usage: mkdosfs [-a][-A][-c][-C][-v][-I][-l bad-block-file][-b backup-boot-sector]\n\
+ [-m boot-msg-file][-n volume-name][-i volume-id]\n\
+ [-s sectors-per-cluster][-S logical-sector-size][-f number-of-FATs]\n\
+ [-h hidden-sectors][-F fat-size][-r root-dir-entries][-R reserved-sectors]\n\
+ /dev/name [blocks]\n");
+}
+
+/*
+ * ++roman: On m68k, check if this is an Atari; if yes, turn on Atari variant
+ * of MS-DOS filesystem by default.
+ */
+static void check_atari(void)
+{
+#ifdef __mc68000__
+ FILE *f;
+ char line[128], *p;
+
+ if (!(f = fopen("/proc/hardware", "r"))) {
+ perror("/proc/hardware");
+ return;
+ }
+
+ while (fgets(line, sizeof(line), f)) {
+ if (strncmp(line, "Model:", 6) == 0) {
+ p = line + 6;
+ p += strspn(p, " \t");
+ if (strncmp(p, "Atari ", 6) == 0)
+ atari_format = 1;
+ break;
+ }
+ }
+ fclose(f);
+#endif
+}
+
+/* The "main" entry point into the utility - we pick up the options and attempt to process them in some sort of sensible
+ way. In the event that some/all of the options are invalid we need to tell the user so that something can be done! */
+
+int main(int argc, char **argv)
+{
+ int c;
+ char *tmp;
+ char *listfile = NULL;
+ FILE *msgfile;
+ struct stat statbuf;
+ int i = 0, pos, ch;
+ int create = 0;
+ unsigned long long cblocks = 0;
+ int min_sector_size;
+
+ if (argc && *argv) { /* What's the program name? */
+ char *p;
+ program_name = *argv;
+ if ((p = strrchr(program_name, '/')))
+ program_name = p + 1;
+ }
+
+ gettimeofday(&create_timeval, NULL);
+ create_time = create_timeval.tv_sec;
+ volume_id = (u_int32_t) ((create_timeval.tv_sec << 20) | create_timeval.tv_usec); /* Default volume ID = creation time, fudged for more uniqueness */
+ check_atari();
+
+ printf("%s " VERSION " (" VERSION_DATE ")\n", program_name);
+
+ while ((c = getopt(argc, argv, "aAb:cCf:F:Ii:l:m:n:r:R:s:S:h:v")) != EOF)
+ /* Scan the command line for options */
+ switch (c) {
+ case 'A': /* toggle Atari format */
+ atari_format = !atari_format;
+ break;
+
+ case 'a': /* a : skip alignment */
+ align_structures = FALSE;
+ break;
+
+ case 'b': /* b : location of backup boot sector */
+ backup_boot = (int)strtol(optarg, &tmp, 0);
+ if (*tmp || backup_boot < 2 || backup_boot > 0xffff) {
+ printf("Bad location for backup boot sector : %s\n", optarg);
+ usage();
+ }
+ break;
+
+ case 'c': /* c : Check FS as we build it */
+ check = TRUE;
+ malloc_entire_fat = TRUE; /* Need to be able to mark clusters bad */
+ break;
+
+ case 'C': /* C : Create a new file */
+ create = TRUE;
+ break;
+
+ case 'f': /* f : Choose number of FATs */
+ nr_fats = (int)strtol(optarg, &tmp, 0);
+ if (*tmp || nr_fats < 1 || nr_fats > 4) {
+ printf("Bad number of FATs : %s\n", optarg);
+ usage();
+ }
+ break;
+
+ case 'F': /* F : Choose FAT size */
+ size_fat = (int)strtol(optarg, &tmp, 0);
+ if (*tmp || (size_fat != 12 && size_fat != 16 && size_fat != 32)) {
+ printf("Bad FAT type : %s\n", optarg);
+ usage();
+ }
+ size_fat_by_user = 1;
+ break;
+
+ case 'h': /* h : number of hidden sectors */
+ hidden_sectors = (int)strtol(optarg, &tmp, 0);
+ if (*tmp || hidden_sectors < 0) {
+ printf("Bad number of hidden sectors : %s\n", optarg);
+ usage();
+ }
+ break;
+
+ case 'I':
+ ignore_full_disk = 1;
+ break;
+
+ case 'i': /* i : specify volume ID */
+ volume_id = strtoul(optarg, &tmp, 16);
+ if (*tmp) {
+ printf("Volume ID must be a hexadecimal number\n");
+ usage();
+ }
+ break;
+
+ case 'l': /* l : Bad block filename */
+ listfile = optarg;
+ malloc_entire_fat = TRUE; /* Need to be able to mark clusters bad */
+ break;
+
+ case 'm': /* m : Set boot message */
+ if (strcmp(optarg, "-")) {
+ msgfile = fopen(optarg, "r");
+ if (!msgfile)
+ perror(optarg);
+ } else
+ msgfile = stdin;
+
+ if (msgfile) {
+ /* The boot code ends at offset 448 and needs a null terminator */
+ i = MESSAGE_OFFSET;
+ pos = 0; /* We are at beginning of line */
+ do {
+ ch = getc(msgfile);
+ switch (ch) {
+ case '\r': /* Ignore CRs */
+ case '\0': /* and nulls */
+ break;
+
+ case '\n': /* LF -> CR+LF if necessary */
+ if (pos) { /* If not at beginning of line */
+ dummy_boot_code[i++] = '\r';
+ pos = 0;
+ }
+ dummy_boot_code[i++] = '\n';
+ break;
+
+ case '\t': /* Expand tabs */
+ do {
+ dummy_boot_code[i++] = ' ';
+ pos++;
+ }
+ while (pos % 8 && i < BOOTCODE_SIZE - 1);
+ break;
+
+ case EOF:
+ dummy_boot_code[i++] = '\0'; /* Null terminator */
+ break;
+
+ default:
+ dummy_boot_code[i++] = ch; /* Store character */
+ pos++; /* Advance position */
+ break;
+ }
+ }
+ while (ch != EOF && i < BOOTCODE_SIZE - 1);
+
+ /* Fill up with zeros */
+ while (i < BOOTCODE_SIZE - 1)
+ dummy_boot_code[i++] = '\0';
+ dummy_boot_code[BOOTCODE_SIZE - 1] = '\0'; /* Just in case */
+
+ if (ch != EOF)
+ printf("Warning: message too long; truncated\n");
+
+ if (msgfile != stdin)
+ fclose(msgfile);
+ }
+ break;
+
+ case 'n': /* n : Volume name */
+ sprintf(volume_name, "%-11.11s", optarg);
+ for (i = 0; i < 11; i++)
+ volume_name[i] = toupper(volume_name[i]);
+
+ break;
+
+ case 'r': /* r : Root directory entries */
+ root_dir_entries = (int)strtol(optarg, &tmp, 0);
+ if (*tmp || root_dir_entries < 16 || root_dir_entries > 32768) {
+ printf("Bad number of root directory entries : %s\n", optarg);
+ usage();
+ }
+ break;
+
+ case 'R': /* R : number of reserved sectors */
+ reserved_sectors = (int)strtol(optarg, &tmp, 0);
+ if (*tmp || reserved_sectors < 1 || reserved_sectors > 0xffff) {
+ printf("Bad number of reserved sectors : %s\n", optarg);
+ usage();
+ }
+ break;
+
+ case 's': /* s : Sectors per cluster */
+ sectors_per_cluster = (int)strtol(optarg, &tmp, 0);
+ if (*tmp || (sectors_per_cluster != 1 && sectors_per_cluster != 2
+ && sectors_per_cluster != 4 && sectors_per_cluster != 8
+ && sectors_per_cluster != 16
+ && sectors_per_cluster != 32
+ && sectors_per_cluster != 64
+ && sectors_per_cluster != 128)) {
+ printf("Bad number of sectors per cluster : %s\n", optarg);
+ usage();
+ }
+ break;
+
+ case 'S': /* S : Sector size */
+ sector_size = (int)strtol(optarg, &tmp, 0);
+ if (*tmp || (sector_size != 512 && sector_size != 1024 &&
+ sector_size != 2048 && sector_size != 4096 &&
+ sector_size != 8192 && sector_size != 16384 &&
+ sector_size != 32768)) {
+ printf("Bad logical sector size : %s\n", optarg);
+ usage();
+ }
+ sector_size_set = 1;
+ break;
+
+ case 'v': /* v : Verbose execution */
+ ++verbose;
+ break;
+
+ default:
+ printf("Unknown option: %c\n", c);
+ usage();
+ }
+ if (optind < argc) {
+ device_name = argv[optind]; /* Determine the number of blocks in the FS */
+
+ if (!device_name) {
+ printf("No device specified.\n");
+ usage();
+ }
+
+ if (!create)
+ cblocks = count_blocks(device_name, &orphaned_sectors); /* Have a look and see! */
+ }
+ if (optind == argc - 2) { /* Either check the user specified number */
+ blocks = strtoull(argv[optind + 1], &tmp, 0);
+ if (!create && blocks != cblocks) {
+ fprintf(stderr, "Warning: block count mismatch: ");
+ fprintf(stderr, "found %llu but assuming %llu.\n", cblocks, blocks);
+ }
+ } else if (optind == argc - 1) { /* Or use value found */
+ if (create)
+ die("Need intended size with -C.");
+ blocks = cblocks;
+ tmp = "";
+ } else {
+ fprintf(stderr, "No device specified!\n");
+ usage();
+ }
+ if (*tmp) {
+ printf("Bad block count : %s\n", argv[optind + 1]);
+ usage();
+ }
+
+ if (check && listfile) /* Auto and specified bad block handling are mutually */
+ die("-c and -l are incompatible"); /* exclusive of each other! */
+
+ if (!create) {
+ check_mount(device_name); /* Is the device already mounted? */
+ dev = open(device_name, O_EXCL | O_RDWR); /* Is it a suitable device to build the FS on? */
+ if (dev < 0) {
+ fprintf(stderr, "%s: unable to open %s: %s\n", program_name,
+ device_name, strerror(errno));
+ exit(1); /* The error exit code is 1! */
+ }
+ } else {
+ loff_t offset = blocks * BLOCK_SIZE - 1;
+ char null = 0;
+ /* create the file */
+ dev = open(device_name, O_EXCL | O_RDWR | O_CREAT | O_TRUNC, 0666);
+ if (dev < 0)
+ die("unable to create %s");
+ /* seek to the intended end-1, and write one byte. this creates a
+ * sparse-as-possible file of appropriate size. */
+ if (llseek(dev, offset, SEEK_SET) != offset)
+ die("seek failed");
+ if (write(dev, &null, 1) < 0)
+ die("write failed");
+ if (llseek(dev, 0, SEEK_SET) != 0)
+ die("seek failed");
+ }
+
+ if (fstat(dev, &statbuf) < 0)
+ die("unable to stat %s");
+ if (!S_ISBLK(statbuf.st_mode)) {
+ statbuf.st_rdev = 0;
+ check = 0;
+ } else
+ /*
+ * Ignore any 'full' fixed disk devices, if -I is not given.
+ * On a MO-disk one doesn't need partitions. The filesytem can go
+ * directly to the whole disk. Under other OSes this is known as
+ * the 'superfloppy' format. As I don't know how to find out if
+ * this is a MO disk I introduce a -I (ignore) switch. -Joey
+ */
+ if (!ignore_full_disk && ((statbuf.st_rdev & 0xffffff3f) == 0x0300 || /* hda, hdb */
+ (statbuf.st_rdev & 0xffffff0f) == 0x0800 || /* sd */
+ (statbuf.st_rdev & 0xffffff3f) == 0x0d00 || /* xd */
+ (statbuf.st_rdev & 0xffffff3f) == 0x1600) /* hdc, hdd */
+ )
+ die("Device partition expected, not making filesystem on entire device '%s' (use -I to override)");
+
+ if (sector_size_set) {
+ if (ioctl(dev, BLKSSZGET, &min_sector_size) >= 0)
+ if (sector_size < min_sector_size) {
+ sector_size = min_sector_size;
+ fprintf(stderr,
+ "Warning: sector size was set to %d (minimal for this device)\n",
+ sector_size);
+ }
+ } else {
+ if (ioctl(dev, BLKSSZGET, &min_sector_size) >= 0) {
+ sector_size = min_sector_size;
+ sector_size_set = 1;
+ }
+ }
+
+ if (sector_size > 4096)
+ fprintf(stderr,
+ "Warning: sector size is set to %d > 4096, such filesystem will not propably mount\n",
+ sector_size);
+
+ establish_params(statbuf.st_rdev, statbuf.st_size);
+ /* Establish the media parameters */
+
+ setup_tables(); /* Establish the file system tables */
+
+ if (check) /* Determine any bad block locations and mark them */
+ check_blocks();
+ else if (listfile)
+ get_list_blocks(listfile);
+
+ write_tables(); /* Write the file system tables away! */
+
+ exit(0); /* Terminate with no errors! */
+}
diff --git a/src/version.h b/src/version.h
new file mode 100644
index 0000000..a7c41a0
--- /dev/null
+++ b/src/version.h
@@ -0,0 +1,29 @@
+/* version.h
+
+ Copyright (C) 1998-2005 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ Copyright (C) 2008-2013 Daniel Baumann <mail@daniel-baumann.ch>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ On Debian systems, the complete text of the GNU General Public License
+ can be found in /usr/share/common-licenses/GPL-3 file.
+*/
+
+#ifndef _version_h
+#define _version_h
+
+#define VERSION "3.0.16"
+#define VERSION_DATE "01 Mar 2013"
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 07:56:48 +0000