125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "unarchive.h"
|
|
#include "libbb.h"
|
|
|
|
extern char get_header_ar(archive_handle_t *archive_handle)
|
|
{
|
|
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;
|
|
} ar;
|
|
#ifdef CONFIG_FEATURE_AR_LONG_FILENAMES
|
|
static char *ar_long_names;
|
|
static unsigned int ar_long_name_size;
|
|
#endif
|
|
|
|
/* dont use bb_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);
|
|
}
|
|
|
|
/* Some ar entries have a trailing '\n' after the previous data entry */
|
|
if (ar.raw[0] == '\n') {
|
|
/* fix up the header, we started reading 1 byte too early */
|
|
memmove(ar.raw, &ar.raw[1], 59);
|
|
ar.raw[59] = bb_xread_char(archive_handle->src_fd);
|
|
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')) {
|
|
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);
|
|
|
|
/* long filenames have '/' as the first character */
|
|
if (ar.formated.name[0] == '/') {
|
|
#ifdef CONFIG_FEATURE_AR_LONG_FILENAMES
|
|
if (ar.formated.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);
|
|
bb_xread_all(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] == ' ') {
|
|
/* This is the index of symbols in the file for compilers */
|
|
data_skip(archive_handle);
|
|
archive_handle->offset += typed->size;
|
|
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) {
|
|
bb_error_msg_and_die("Cant resolve long filename");
|
|
}
|
|
typed->name = bb_xstrdup(ar_long_names + long_offset);
|
|
}
|
|
#else
|
|
bb_error_msg_and_die("long filenames not supported");
|
|
#endif
|
|
} else {
|
|
/* short filenames */
|
|
typed->name = bb_xstrndup(ar.formated.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);
|
|
} else {
|
|
archive_handle->action_data(archive_handle);
|
|
}
|
|
} else {
|
|
data_skip(archive_handle);
|
|
}
|
|
|
|
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);
|
|
}
|