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Diffstat (limited to 'Utilities/cmlibarchive/libarchive/archive_write_set_format_gnutar.c')
-rw-r--r--Utilities/cmlibarchive/libarchive/archive_write_set_format_gnutar.c684
1 files changed, 684 insertions, 0 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_write_set_format_gnutar.c b/Utilities/cmlibarchive/libarchive/archive_write_set_format_gnutar.c
new file mode 100644
index 000000000..e091ed23f
--- /dev/null
+++ b/Utilities/cmlibarchive/libarchive/archive_write_set_format_gnutar.c
@@ -0,0 +1,684 @@
+/*-
+ * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+ * Author: Jonas Gastal <jgastal@profusion.mobi>
+ * Copyright (c) 2011 Michihiro NAKAJIMA
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "archive_platform.h"
+__FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_format_gnu_tar.c 191579 2009-04-27 18:35:03Z gastal $");
+
+
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#include <stdio.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#include "archive.h"
+#include "archive_entry.h"
+#include "archive_entry_locale.h"
+#include "archive_private.h"
+#include "archive_write_private.h"
+
+struct gnutar {
+ uint64_t entry_bytes_remaining;
+ uint64_t entry_padding;
+ const char * linkname;
+ size_t linkname_length;
+ const char * pathname;
+ size_t pathname_length;
+ const char * uname;
+ size_t uname_length;
+ const char * gname;
+ size_t gname_length;
+ struct archive_string_conv *opt_sconv;
+ struct archive_string_conv *sconv_default;
+ int init_default_conversion;
+};
+
+/*
+ * Define structure of GNU tar header.
+ */
+#define GNUTAR_name_offset 0
+#define GNUTAR_name_size 100
+#define GNUTAR_mode_offset 100
+#define GNUTAR_mode_size 7
+#define GNUTAR_mode_max_size 8
+#define GNUTAR_uid_offset 108
+#define GNUTAR_uid_size 7
+#define GNUTAR_uid_max_size 8
+#define GNUTAR_gid_offset 116
+#define GNUTAR_gid_size 7
+#define GNUTAR_gid_max_size 8
+#define GNUTAR_size_offset 124
+#define GNUTAR_size_size 11
+#define GNUTAR_size_max_size 12
+#define GNUTAR_mtime_offset 136
+#define GNUTAR_mtime_size 11
+#define GNUTAR_mtime_max_size 11
+#define GNUTAR_checksum_offset 148
+#define GNUTAR_checksum_size 8
+#define GNUTAR_typeflag_offset 156
+#define GNUTAR_typeflag_size 1
+#define GNUTAR_linkname_offset 157
+#define GNUTAR_linkname_size 100
+#define GNUTAR_magic_offset 257
+#define GNUTAR_magic_size 6
+#define GNUTAR_version_offset 263
+#define GNUTAR_version_size 2
+#define GNUTAR_uname_offset 265
+#define GNUTAR_uname_size 32
+#define GNUTAR_gname_offset 297
+#define GNUTAR_gname_size 32
+#define GNUTAR_rdevmajor_offset 329
+#define GNUTAR_rdevmajor_size 6
+#define GNUTAR_rdevmajor_max_size 8
+#define GNUTAR_rdevminor_offset 337
+#define GNUTAR_rdevminor_size 6
+#define GNUTAR_rdevminor_max_size 8
+
+/*
+ * A filled-in copy of the header for initialization.
+ */
+static const char template_header[] = {
+ /* name: 100 bytes */
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,
+ /* Mode, null termination: 8 bytes */
+ '0','0','0','0','0','0', '0','\0',
+ /* uid, null termination: 8 bytes */
+ '0','0','0','0','0','0', '0','\0',
+ /* gid, null termination: 8 bytes */
+ '0','0','0','0','0','0', '0','\0',
+ /* size, space termation: 12 bytes */
+ '0','0','0','0','0','0','0','0','0','0','0', '\0',
+ /* mtime, space termation: 12 bytes */
+ '0','0','0','0','0','0','0','0','0','0','0', '\0',
+ /* Initial checksum value: 8 spaces */
+ ' ',' ',' ',' ',' ',' ',' ',' ',
+ /* Typeflag: 1 byte */
+ '0', /* '0' = regular file */
+ /* Linkname: 100 bytes */
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,
+ /* Magic: 8 bytes */
+ 'u','s','t','a','r',' ', ' ','\0',
+ /* Uname: 32 bytes */
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ /* Gname: 32 bytes */
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ /* rdevmajor + null padding: 8 bytes */
+ '\0','\0','\0','\0','\0','\0', '\0','\0',
+ /* rdevminor + null padding: 8 bytes */
+ '\0','\0','\0','\0','\0','\0', '\0','\0',
+ /* Padding: 167 bytes */
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0
+};
+
+static int archive_write_gnutar_options(struct archive_write *,
+ const char *, const char *);
+static int archive_format_gnutar_header(struct archive_write *, char h[512],
+ struct archive_entry *, int tartype);
+static int archive_write_gnutar_header(struct archive_write *,
+ struct archive_entry *entry);
+static ssize_t archive_write_gnutar_data(struct archive_write *a, const void *buff,
+ size_t s);
+static int archive_write_gnutar_free(struct archive_write *);
+static int archive_write_gnutar_close(struct archive_write *);
+static int archive_write_gnutar_finish_entry(struct archive_write *);
+static int format_256(int64_t, char *, int);
+static int format_number(int64_t, char *, int size, int maxsize);
+static int format_octal(int64_t, char *, int);
+
+/*
+ * Set output format to 'GNU tar' format.
+ */
+int
+archive_write_set_format_gnutar(struct archive *_a)
+{
+ struct archive_write *a = (struct archive_write *)_a;
+ struct gnutar *gnutar;
+
+ gnutar = (struct gnutar *)calloc(1, sizeof(*gnutar));
+ if (gnutar == NULL) {
+ archive_set_error(&a->archive, ENOMEM, "Can't allocate gnutar data");
+ return (ARCHIVE_FATAL);
+ }
+ a->format_data = gnutar;
+ a->format_name = "gnutar";
+ a->format_options = archive_write_gnutar_options;
+ a->format_write_header = archive_write_gnutar_header;
+ a->format_write_data = archive_write_gnutar_data;
+ a->format_close = archive_write_gnutar_close;
+ a->format_free = archive_write_gnutar_free;
+ a->format_finish_entry = archive_write_gnutar_finish_entry;
+ a->archive.archive_format = ARCHIVE_FORMAT_TAR_GNUTAR;
+ a->archive.archive_format_name = "GNU tar";
+ return (ARCHIVE_OK);
+}
+
+static int
+archive_write_gnutar_options(struct archive_write *a, const char *key,
+ const char *val)
+{
+ struct gnutar *gnutar = (struct gnutar *)a->format_data;
+ int ret = ARCHIVE_FAILED;
+
+ if (strcmp(key, "hdrcharset") == 0) {
+ if (val == NULL || val[0] == 0)
+ archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
+ "%s: hdrcharset option needs a character-set name",
+ a->format_name);
+ else {
+ gnutar->opt_sconv = archive_string_conversion_to_charset(
+ &a->archive, val, 0);
+ if (gnutar->opt_sconv != NULL)
+ ret = ARCHIVE_OK;
+ else
+ ret = ARCHIVE_FATAL;
+ }
+ } else
+ archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
+ "%s: unknown keyword ``%s''", a->format_name, key);
+
+ return (ret);
+}
+
+static int
+archive_write_gnutar_close(struct archive_write *a)
+{
+ return (__archive_write_nulls(a, 512*2));
+}
+
+static int
+archive_write_gnutar_free(struct archive_write *a)
+{
+ struct gnutar *gnutar;
+
+ gnutar = (struct gnutar *)a->format_data;
+ free(gnutar);
+ a->format_data = NULL;
+ return (ARCHIVE_OK);
+}
+
+static int
+archive_write_gnutar_finish_entry(struct archive_write *a)
+{
+ struct gnutar *gnutar;
+ int ret;
+
+ gnutar = (struct gnutar *)a->format_data;
+ ret = __archive_write_nulls(a,
+ gnutar->entry_bytes_remaining + gnutar->entry_padding);
+ gnutar->entry_bytes_remaining = gnutar->entry_padding = 0;
+ return (ret);
+}
+
+static ssize_t
+archive_write_gnutar_data(struct archive_write *a, const void *buff, size_t s)
+{
+ struct gnutar *gnutar;
+ int ret;
+
+ gnutar = (struct gnutar *)a->format_data;
+ if (s > gnutar->entry_bytes_remaining)
+ s = gnutar->entry_bytes_remaining;
+ ret = __archive_write_output(a, buff, s);
+ gnutar->entry_bytes_remaining -= s;
+ if (ret != ARCHIVE_OK)
+ return (ret);
+ return (s);
+}
+
+static int
+archive_write_gnutar_header(struct archive_write *a,
+ struct archive_entry *entry)
+{
+ char buff[512];
+ int r, ret, ret2 = ARCHIVE_OK;
+ int tartype;
+ struct gnutar *gnutar;
+ struct archive_string_conv *sconv;
+
+ gnutar = (struct gnutar *)a->format_data;
+
+ /* Setup default string conversion. */
+ if (gnutar->opt_sconv == NULL) {
+ if (!gnutar->init_default_conversion) {
+ gnutar->sconv_default =
+ archive_string_default_conversion_for_write(
+ &(a->archive));
+ gnutar->init_default_conversion = 1;
+ }
+ sconv = gnutar->sconv_default;
+ } else
+ sconv = gnutar->opt_sconv;
+
+ /* Only regular files (not hardlinks) have data. */
+ if (archive_entry_hardlink(entry) != NULL ||
+ archive_entry_symlink(entry) != NULL ||
+ !(archive_entry_filetype(entry) == AE_IFREG))
+ archive_entry_set_size(entry, 0);
+
+ if (AE_IFDIR == archive_entry_filetype(entry)) {
+ const char *p;
+ char *t;
+ /*
+ * Ensure a trailing '/'. Modify the entry so
+ * the client sees the change.
+ */
+ p = archive_entry_pathname(entry);
+ if (p[strlen(p) - 1] != '/') {
+ t = (char *)malloc(strlen(p) + 2);
+ if (t == NULL) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Can't allocate gnutar data");
+ return(ARCHIVE_FATAL);
+ }
+ strcpy(t, p);
+ strcat(t, "/");
+ archive_entry_copy_pathname(entry, t);
+ free(t);
+ }
+ }
+
+ r = archive_entry_pathname_l(entry, &(gnutar->pathname),
+ &(gnutar->pathname_length), sconv);
+ if (r != 0) {
+ if (errno == ENOMEM) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Can't allocate memory for Pathame");
+ return (ARCHIVE_FATAL);
+ }
+ archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
+ "Can't translate pathname '%s' to %s",
+ archive_entry_pathname(entry),
+ archive_string_conversion_charset_name(sconv));
+ ret2 = ARCHIVE_WARN;
+ }
+ r = archive_entry_uname_l(entry, &(gnutar->uname),
+ &(gnutar->uname_length), sconv);
+ if (r != 0) {
+ if (errno == ENOMEM) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Can't allocate memory for Uname");
+ return (ARCHIVE_FATAL);
+ }
+ archive_set_error(&a->archive,
+ ARCHIVE_ERRNO_FILE_FORMAT,
+ "Can't translate uname '%s' to %s",
+ archive_entry_uname(entry),
+ archive_string_conversion_charset_name(sconv));
+ ret2 = ARCHIVE_WARN;
+ }
+ r = archive_entry_gname_l(entry, &(gnutar->gname),
+ &(gnutar->gname_length), sconv);
+ if (r != 0) {
+ if (errno == ENOMEM) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Can't allocate memory for Gname");
+ return (ARCHIVE_FATAL);
+ }
+ archive_set_error(&a->archive,
+ ARCHIVE_ERRNO_FILE_FORMAT,
+ "Can't translate gname '%s' to %s",
+ archive_entry_gname(entry),
+ archive_string_conversion_charset_name(sconv));
+ ret2 = ARCHIVE_WARN;
+ }
+
+ /* If linkname is longer than 100 chars we need to add a 'K' header. */
+ r = archive_entry_hardlink_l(entry, &(gnutar->linkname),
+ &(gnutar->linkname_length), sconv);
+ if (r != 0) {
+ if (errno == ENOMEM) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Can't allocate memory for Linkname");
+ return (ARCHIVE_FATAL);
+ }
+ archive_set_error(&a->archive,
+ ARCHIVE_ERRNO_FILE_FORMAT,
+ "Can't translate linkname '%s' to %s",
+ archive_entry_hardlink(entry),
+ archive_string_conversion_charset_name(sconv));
+ ret2 = ARCHIVE_WARN;
+ }
+ if (gnutar->linkname_length == 0) {
+ r = archive_entry_symlink_l(entry, &(gnutar->linkname),
+ &(gnutar->linkname_length), sconv);
+ if (r != 0) {
+ if (errno == ENOMEM) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Can't allocate memory for Linkname");
+ return (ARCHIVE_FATAL);
+ }
+ archive_set_error(&a->archive,
+ ARCHIVE_ERRNO_FILE_FORMAT,
+ "Can't translate linkname '%s' to %s",
+ archive_entry_hardlink(entry),
+ archive_string_conversion_charset_name(sconv));
+ ret2 = ARCHIVE_WARN;
+ }
+ }
+ if (gnutar->linkname_length > GNUTAR_linkname_size) {
+ size_t todo = gnutar->linkname_length;
+ struct archive_entry *temp = archive_entry_new2(&a->archive);
+
+ /* Uname/gname here don't really matter since noone reads them;
+ * these are the values that GNU tar happens to use on FreeBSD. */
+ archive_entry_set_uname(temp, "root");
+ archive_entry_set_gname(temp, "wheel");
+
+ archive_entry_set_pathname(temp, "././@LongLink");
+ archive_entry_set_size(temp, gnutar->linkname_length + 1);
+ ret = archive_format_gnutar_header(a, buff, temp, 'K');
+ if (ret < ARCHIVE_WARN)
+ return (ret);
+ ret = __archive_write_output(a, buff, 512);
+ if(ret < ARCHIVE_WARN)
+ return (ret);
+ archive_entry_free(temp);
+ /* Write as many 512 bytes blocks as needed to write full name. */
+ ret = __archive_write_output(a, gnutar->linkname, todo);
+ if(ret < ARCHIVE_WARN)
+ return (ret);
+ ret = __archive_write_nulls(a, 0x1ff & (-(ssize_t)todo));
+ if (ret < ARCHIVE_WARN)
+ return (ret);
+ }
+
+ /* If pathname is longer than 100 chars we need to add an 'L' header. */
+ if (gnutar->pathname_length > GNUTAR_name_size) {
+ const char *pathname = gnutar->pathname;
+ size_t todo = gnutar->pathname_length;
+ struct archive_entry *temp = archive_entry_new2(&a->archive);
+
+ /* Uname/gname here don't really matter since noone reads them;
+ * these are the values that GNU tar happens to use on FreeBSD. */
+ archive_entry_set_uname(temp, "root");
+ archive_entry_set_gname(temp, "wheel");
+
+ archive_entry_set_pathname(temp, "././@LongLink");
+ archive_entry_set_size(temp, gnutar->pathname_length + 1);
+ ret = archive_format_gnutar_header(a, buff, temp, 'L');
+ if (ret < ARCHIVE_WARN)
+ return (ret);
+ ret = __archive_write_output(a, buff, 512);
+ if(ret < ARCHIVE_WARN)
+ return (ret);
+ archive_entry_free(temp);
+ /* Write as many 512 bytes blocks as needed to write full name. */
+ ret = __archive_write_output(a, pathname, todo);
+ if(ret < ARCHIVE_WARN)
+ return (ret);
+ ret = __archive_write_nulls(a, 0x1ff & (-(ssize_t)todo));
+ if (ret < ARCHIVE_WARN)
+ return (ret);
+ }
+
+ if (archive_entry_hardlink(entry) != NULL) {
+ tartype = '1';
+ } else
+ switch (archive_entry_filetype(entry)) {
+ case AE_IFREG: tartype = '0' ; break;
+ case AE_IFLNK: tartype = '2' ; break;
+ case AE_IFCHR: tartype = '3' ; break;
+ case AE_IFBLK: tartype = '4' ; break;
+ case AE_IFDIR: tartype = '5' ; break;
+ case AE_IFIFO: tartype = '6' ; break;
+ case AE_IFSOCK:
+ archive_set_error(&a->archive,
+ ARCHIVE_ERRNO_FILE_FORMAT,
+ "tar format cannot archive socket");
+ return (ARCHIVE_FAILED);
+ default:
+ archive_set_error(&a->archive,
+ ARCHIVE_ERRNO_FILE_FORMAT,
+ "tar format cannot archive this (mode=0%lo)",
+ (unsigned long)archive_entry_mode(entry));
+ return (ARCHIVE_FAILED);
+ }
+
+ ret = archive_format_gnutar_header(a, buff, entry, tartype);
+ if (ret < ARCHIVE_WARN)
+ return (ret);
+ if (ret2 < ret)
+ ret = ret2;
+ ret2 = __archive_write_output(a, buff, 512);
+ if (ret2 < ARCHIVE_WARN)
+ return (ret2);
+ if (ret2 < ret)
+ ret = ret2;
+
+ gnutar->entry_bytes_remaining = archive_entry_size(entry);
+ gnutar->entry_padding = 0x1ff & (-(int64_t)gnutar->entry_bytes_remaining);
+ return (ret);
+}
+
+static int
+archive_format_gnutar_header(struct archive_write *a, char h[512],
+ struct archive_entry *entry, int tartype)
+{
+ unsigned int checksum;
+ int i, ret;
+ size_t copy_length;
+ const char *p;
+ struct gnutar *gnutar;
+
+ gnutar = (struct gnutar *)a->format_data;
+
+ ret = 0;
+
+ /*
+ * The "template header" already includes the signature,
+ * various end-of-field markers, and other required elements.
+ */
+ memcpy(h, &template_header, 512);
+
+ /*
+ * Because the block is already null-filled, and strings
+ * are allowed to exactly fill their destination (without null),
+ * I use memcpy(dest, src, strlen()) here a lot to copy strings.
+ */
+
+ if (tartype == 'K' || tartype == 'L') {
+ p = archive_entry_pathname(entry);
+ copy_length = strlen(p);
+ } else {
+ p = gnutar->pathname;
+ copy_length = gnutar->pathname_length;
+ }
+ if (copy_length > GNUTAR_name_size)
+ copy_length = GNUTAR_name_size;
+ memcpy(h + GNUTAR_name_offset, p, copy_length);
+
+ if ((copy_length = gnutar->linkname_length) > 0) {
+ if (copy_length > GNUTAR_linkname_size)
+ copy_length = GNUTAR_linkname_size;
+ memcpy(h + GNUTAR_linkname_offset, gnutar->linkname,
+ copy_length);
+ }
+
+ /* TODO: How does GNU tar handle unames longer than GNUTAR_uname_size? */
+ if (tartype == 'K' || tartype == 'L') {
+ p = archive_entry_uname(entry);
+ copy_length = strlen(p);
+ } else {
+ p = gnutar->uname;
+ copy_length = gnutar->uname_length;
+ }
+ if (copy_length > 0) {
+ if (copy_length > GNUTAR_uname_size)
+ copy_length = GNUTAR_uname_size;
+ memcpy(h + GNUTAR_uname_offset, p, copy_length);
+ }
+
+ /* TODO: How does GNU tar handle gnames longer than GNUTAR_gname_size? */
+ if (tartype == 'K' || tartype == 'L') {
+ p = archive_entry_gname(entry);
+ copy_length = strlen(p);
+ } else {
+ p = gnutar->gname;
+ copy_length = gnutar->gname_length;
+ }
+ if (copy_length > 0) {
+ if (strlen(p) > GNUTAR_gname_size)
+ copy_length = GNUTAR_gname_size;
+ memcpy(h + GNUTAR_gname_offset, p, copy_length);
+ }
+
+ /* By truncating the mode here, we ensure it always fits. */
+ format_octal(archive_entry_mode(entry) & 07777,
+ h + GNUTAR_mode_offset, GNUTAR_mode_size);
+
+ /* TODO: How does GNU tar handle large UIDs? */
+ if (format_octal(archive_entry_uid(entry),
+ h + GNUTAR_uid_offset, GNUTAR_uid_size)) {
+ archive_set_error(&a->archive, ERANGE,
+ "Numeric user ID %jd too large",
+ (intmax_t)archive_entry_uid(entry));
+ ret = ARCHIVE_FAILED;
+ }
+
+ /* TODO: How does GNU tar handle large GIDs? */
+ if (format_octal(archive_entry_gid(entry),
+ h + GNUTAR_gid_offset, GNUTAR_gid_size)) {
+ archive_set_error(&a->archive, ERANGE,
+ "Numeric group ID %jd too large",
+ (intmax_t)archive_entry_gid(entry));
+ ret = ARCHIVE_FAILED;
+ }
+
+ /* GNU tar supports base-256 here, so should never overflow. */
+ if (format_number(archive_entry_size(entry), h + GNUTAR_size_offset,
+ GNUTAR_size_size, GNUTAR_size_max_size)) {
+ archive_set_error(&a->archive, ERANGE,
+ "File size out of range");
+ ret = ARCHIVE_FAILED;
+ }
+
+ /* Shouldn't overflow before 2106, since mtime field is 33 bits. */
+ format_octal(archive_entry_mtime(entry),
+ h + GNUTAR_mtime_offset, GNUTAR_mtime_size);
+
+ if (archive_entry_filetype(entry) == AE_IFBLK
+ || archive_entry_filetype(entry) == AE_IFCHR) {
+ if (format_octal(archive_entry_rdevmajor(entry),
+ h + GNUTAR_rdevmajor_offset,
+ GNUTAR_rdevmajor_size)) {
+ archive_set_error(&a->archive, ERANGE,
+ "Major device number too large");
+ ret = ARCHIVE_FAILED;
+ }
+
+ if (format_octal(archive_entry_rdevminor(entry),
+ h + GNUTAR_rdevminor_offset,
+ GNUTAR_rdevminor_size)) {
+ archive_set_error(&a->archive, ERANGE,
+ "Minor device number too large");
+ ret = ARCHIVE_FAILED;
+ }
+ }
+
+ h[GNUTAR_typeflag_offset] = tartype;
+
+ checksum = 0;
+ for (i = 0; i < 512; i++)
+ checksum += 255 & (unsigned int)h[i];
+ h[GNUTAR_checksum_offset + 6] = '\0'; /* Can't be pre-set in the template. */
+ /* h[GNUTAR_checksum_offset + 7] = ' '; */ /* This is pre-set in the template. */
+ format_octal(checksum, h + GNUTAR_checksum_offset, 6);
+ return (ret);
+}
+
+/*
+ * Format a number into a field, falling back to base-256 if necessary.
+ */
+static int
+format_number(int64_t v, char *p, int s, int maxsize)
+{
+ int64_t limit = ((int64_t)1 << (s*3));
+
+ if (v < limit)
+ return (format_octal(v, p, s));
+ return (format_256(v, p, maxsize));
+}
+
+/*
+ * Format a number into the specified field using base-256.
+ */
+static int
+format_256(int64_t v, char *p, int s)
+{
+ p += s;
+ while (s-- > 0) {
+ *--p = (char)(v & 0xff);
+ v >>= 8;
+ }
+ *p |= 0x80; /* Set the base-256 marker bit. */
+ return (0);
+}
+
+/*
+ * Format a number into the specified field using octal.
+ */
+static int
+format_octal(int64_t v, char *p, int s)
+{
+ int len = s;
+
+ /* Octal values can't be negative, so use 0. */
+ if (v < 0)
+ v = 0;
+
+ p += s; /* Start at the end and work backwards. */
+ while (s-- > 0) {
+ *--p = (char)('0' + (v & 7));
+ v >>= 3;
+ }
+
+ if (v == 0)
+ return (0);
+
+ /* If it overflowed, fill field with max value. */
+ while (len-- > 0)
+ *p++ = '7';
+
+ return (-1);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-20 09:32:35 +0000