blob: 35ff99671b92f264991158425531fc2b63a511bc [file] [log] [blame]
Glenn L McGrathd22e5602001-04-11 02:12:08 +00001/* vi: set sw=4 ts=4: */
2/*
3 * Copyright (C) tons of folks. Tracking down who wrote what
4 * isn't something I'm going to worry about... If you wrote something
5 * here, please feel free to acknowledge your work.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
22 * Permission has been granted to redistribute this code under the GPL.
23 *
24 */
25
26#include <fcntl.h>
27#include <unistd.h>
28#include <stdlib.h>
29#include <signal.h>
30#include "libbb.h"
31
Glenn L McGrath4949faf2001-04-11 16:23:35 +000032const int dpkg_deb_contents = 1;
33const int dpkg_deb_control = 2;
34const int dpkg_deb_info = 4;
35const int dpkg_deb_extract = 8;
36const int dpkg_deb_verbose_extract = 16;
37const int dpkg_deb_list = 32;
Glenn L McGrathd22e5602001-04-11 02:12:08 +000038
Glenn L McGrath4949faf2001-04-11 16:23:35 +000039extern int deb_extract(const char *package_filename, const int function, char *target_dir)
Glenn L McGrathd22e5602001-04-11 02:12:08 +000040{
Glenn L McGrathd22e5602001-04-11 02:12:08 +000041
Glenn L McGrath4949faf2001-04-11 16:23:35 +000042 FILE *deb_file, *uncompressed_file;
43 ar_headers_t *headers = NULL;
44 char *ared_file;
45 int gunzip_pid;
Glenn L McGrathd22e5602001-04-11 02:12:08 +000046
Glenn L McGrath4949faf2001-04-11 16:23:35 +000047 if ((function == dpkg_deb_info) || (function == dpkg_deb_control)) {
48 ared_file = xstrdup("control.tar.gz");
49 } else {
50 ared_file = xstrdup("data.tar.gz");
Glenn L McGrathd22e5602001-04-11 02:12:08 +000051 }
52
Glenn L McGrath4949faf2001-04-11 16:23:35 +000053 /* open the debian package to be worked on */
54 deb_file = wfopen(package_filename, "r");
55
56 headers = (ar_headers_t *) xmalloc(sizeof(ar_headers_t));
Glenn L McGrathd22e5602001-04-11 02:12:08 +000057
Glenn L McGrath4949faf2001-04-11 16:23:35 +000058 /* get a linked list of all ar entries */
59 if ((headers = get_ar_headers(deb_file)) == NULL) {
60 error_msg("Couldnt get ar headers\n");
61 return(EXIT_FAILURE);
Glenn L McGrathd22e5602001-04-11 02:12:08 +000062 }
63
Glenn L McGrath4949faf2001-04-11 16:23:35 +000064 /* seek to the start of the .tar.gz file within the ar file*/
65 if (seek_ared_file(deb_file, headers, ared_file) == EXIT_FAILURE) {
66 error_msg("Couldnt seek to ar file");
Glenn L McGrathd22e5602001-04-11 02:12:08 +000067 }
Glenn L McGrath4949faf2001-04-11 16:23:35 +000068
69 /* open a stream of decompressed data */
70 uncompressed_file = fdopen(gz_open(deb_file, &gunzip_pid), "r");
71
72 /* get a list of all tar headers inside the .gz file */
73 untar(uncompressed_file, dpkg_deb_extract, target_dir);
Glenn L McGrathd22e5602001-04-11 02:12:08 +000074
75 /* we are deliberately terminating the child so we can safely ignore this */
76 signal(SIGTERM, SIG_IGN);
Glenn L McGrath4949faf2001-04-11 16:23:35 +000077 gz_close(gunzip_pid);
78 fclose(deb_file);
79 fclose(uncompressed_file);
80 return(EXIT_SUCCESS);
Glenn L McGrathd22e5602001-04-11 02:12:08 +000081}