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/*
* 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 "unarchive.h"
#include "libbb.h"
char *deb_extract(const char *package_filename, FILE *out_stream,
const int extract_function, const char *prefix, const char *filename)
{
FILE *deb_stream;
FILE *uncompressed_stream = NULL;
file_header_t *ar_header = NULL;
char **file_list = NULL;
char *output_buffer = NULL;
char *ared_file = NULL;
char ar_magic[8];
int gunzip_pid;
if (filename != NULL) {
file_list = xmalloc(sizeof(char *) * 2);
file_list[0] = xstrdup(filename);
file_list[1] = NULL;
}
if (extract_function & extract_control_tar_gz) {
ared_file = xstrdup("control.tar.gz");
}
else if (extract_function & extract_data_tar_gz) {
ared_file = xstrdup("data.tar.gz");
}
/* open the debian package to be worked on */
deb_stream = wfopen(package_filename, "r");
if (deb_stream == NULL) {
return(NULL);
}
/* set the buffer size */
setvbuf(deb_stream, NULL, _IOFBF, 0x8000);
/* check ar magic */
fread(ar_magic, 1, 8, deb_stream);
if (strncmp(ar_magic,"!<arch>",7) != 0) {
error_msg_and_die("invalid magic");
}
archive_offset = 8;
while ((ar_header = get_header_ar(deb_stream)) != NULL) {
if (strcmp(ared_file, ar_header->name) == 0) {
/* open a stream of decompressed data */
uncompressed_stream = gz_open(deb_stream, &gunzip_pid);
archive_offset = 0;
output_buffer = unarchive(uncompressed_stream, out_stream, get_header_tar, extract_function, prefix, file_list, NULL);
}
seek_sub_file(deb_stream, ar_header->size);
free(ar_header->name);
free(ar_header);
}
gz_close(gunzip_pid);
fclose(deb_stream);
fclose(uncompressed_stream);
free(ared_file);
if (filename != NULL) {
free(file_list[0]);
free(file_list);
}
return(output_buffer);
}
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