-/*
- * 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 2 of the License, or
- * (at your option) any later version.
+/* vi: set sw=4 ts=4: */
+/* Copyright 2001 Glenn McGrath.
*
- * 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 Library General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include "unarchive.h"
#include "libbb.h"
+#include "unarchive.h"
-extern char get_header_ar(archive_handle_t *archive_handle)
+char FAST_FUNC get_header_ar(archive_handle_t *archive_handle)
{
+ int err;
file_header_t *typed = archive_handle->file_header;
union {
char raw[60];
- struct {
- char name[16];
- char date[12];
- char uid[6];
- char gid[6];
- char mode[8];
- char size[10];
- char magic[2];
- } formated;
+ struct {
+ char name[16];
+ char date[12];
+ char uid[6];
+ char gid[6];
+ char mode[8];
+ char size[10];
+ char magic[2];
+ } formatted;
} ar;
-#ifdef CONFIG_FEATURE_AR_LONG_FILENAMES
+#if ENABLE_FEATURE_AR_LONG_FILENAMES
static char *ar_long_names;
- static unsigned int ar_long_name_size;
+ static unsigned ar_long_name_size;
#endif
/* dont use xread as we want to handle the error ourself */
if (read(archive_handle->src_fd, ar.raw, 60) != 60) {
/* End Of File */
- return(EXIT_FAILURE);
- }
+ return EXIT_FAILURE;
+ }
- /* Some ar entries have a trailing '\n' after the previous data entry */
+ /* ar header starts on an even byte (2 byte aligned)
+ * '\n' is used for padding
+ */
if (ar.raw[0] == '\n') {
/* fix up the header, we started reading 1 byte too early */
memmove(ar.raw, &ar.raw[1], 59);
archive_handle->offset++;
}
archive_handle->offset += 60;
-
+
/* align the headers based on the header magic */
- if ((ar.formated.magic[0] != '`') || (ar.formated.magic[1] != '\n')) {
- error_msg_and_die("Invalid ar header");
- }
+ if (ar.formatted.magic[0] != '`' || ar.formatted.magic[1] != '\n')
+ bb_error_msg_and_die("invalid ar header");
- typed->mode = strtol(ar.formated.mode, NULL, 8);
- typed->mtime = atoi(ar.formated.date);
- typed->uid = atoi(ar.formated.uid);
- typed->gid = atoi(ar.formated.gid);
- typed->size = atoi(ar.formated.size);
+ /* FIXME: more thorough routine would be in order here */
+ /* (we have something like that in tar) */
+ /* but for now we are lax. This code works because */
+ /* on misformatted numbers bb_strtou returns all-ones */
+ typed->mode = err = bb_strtou(ar.formatted.mode, NULL, 8);
+ if (err == -1) bb_error_msg_and_die("invalid ar header");
+ typed->mtime = err = bb_strtou(ar.formatted.date, NULL, 10);
+ if (err == -1) bb_error_msg_and_die("invalid ar header");
+ typed->uid = err = bb_strtou(ar.formatted.uid, NULL, 10);
+ if (err == -1) bb_error_msg_and_die("invalid ar header");
+ typed->gid = err = bb_strtou(ar.formatted.gid, NULL, 10);
+ if (err == -1) bb_error_msg_and_die("invalid ar header");
+ typed->size = err = bb_strtou(ar.formatted.size, NULL, 10);
+ if (err == -1) bb_error_msg_and_die("invalid ar header");
/* long filenames have '/' as the first character */
- if (ar.formated.name[0] == '/') {
-#ifdef CONFIG_FEATURE_AR_LONG_FILENAMES
- if (ar.formated.name[1] == '/') {
+ if (ar.formatted.name[0] == '/') {
+#if ENABLE_FEATURE_AR_LONG_FILENAMES
+ unsigned long_offset;
+
+ if (ar.formatted.name[1] == '/') {
/* If the second char is a '/' then this entries data section
* stores long filename for multiple entries, they are stored
* in static variable long_names for use in future entries */
ar_long_name_size = typed->size;
ar_long_names = xmalloc(ar_long_name_size);
- xread_all(archive_handle->src_fd, ar_long_names, ar_long_name_size);
+ xread(archive_handle->src_fd, ar_long_names, ar_long_name_size);
archive_handle->offset += ar_long_name_size;
/* This ar entries data section only contained filenames for other records
* they are stored in the static ar_long_names for future reference */
- return (get_header_ar(archive_handle)); /* Return next header */
- } else if (ar.formated.name[1] == ' ') {
+ return get_header_ar(archive_handle); /* Return next header */
+ }
+
+ if (ar.formatted.name[1] == ' ') {
/* This is the index of symbols in the file for compilers */
data_skip(archive_handle);
- return (get_header_ar(archive_handle)); /* Return next header */
- } else {
- /* The number after the '/' indicates the offset in the ar data section
- (saved in variable long_name) that conatains the real filename */
- const unsigned int long_offset = atoi(&ar.formated.name[1]);
- if (long_offset >= ar_long_name_size) {
- error_msg_and_die("Cant resolve long filename");
- }
- typed->name = xstrdup(ar_long_names + long_offset);
+ archive_handle->offset += typed->size;
+ return get_header_ar(archive_handle); /* Return next header */
}
+
+ /* The number after the '/' indicates the offset in the ar data section
+ * (saved in variable long_name) that conatains the real filename */
+ long_offset = atoi(&ar.formatted.name[1]);
+ if (long_offset >= ar_long_name_size) {
+ bb_error_msg_and_die("can't resolve long filename");
+ }
+ typed->name = xstrdup(ar_long_names + long_offset);
#else
- error_msg_and_die("long filenames not supported");
+ bb_error_msg_and_die("long filenames not supported");
#endif
} else {
/* short filenames */
- typed->name = xstrndup(ar.formated.name, 16);
+ typed->name = xstrndup(ar.formatted.name, 16);
}
typed->name[strcspn(typed->name, " /")] = '\0';
if (archive_handle->filter(archive_handle) == EXIT_SUCCESS) {
archive_handle->action_header(typed);
if (archive_handle->sub_archive) {
- while (archive_handle->action_data_subarchive(archive_handle->sub_archive) == EXIT_SUCCESS);
+ while (archive_handle->action_data_subarchive(archive_handle->sub_archive) == EXIT_SUCCESS)
+ continue;
} else {
archive_handle->action_data(archive_handle);
}
} else {
- data_skip(archive_handle);
+ data_skip(archive_handle);
}
- archive_handle->offset += typed->size + 1;
+ archive_handle->offset += typed->size;
+ /* Set the file pointer to the correct spot, we may have been reading a compressed file */
+ lseek(archive_handle->src_fd, archive_handle->offset, SEEK_SET);
- return(EXIT_SUCCESS);
+ return EXIT_SUCCESS;
}
-
projects / oweals / busybox.git / blobdiff