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+/* 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);
+}
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