path: root/archival/dpkg_deb.c (plain)
blob: ebbc7f035482bebe736ac8cd8542a301bd394a69

1	/* vi: set sw=4 ts=4: */
2	/*
3	* dpkg-deb packs, unpacks and provides information about Debian archives.
4	*
5	* Licensed under GPLv2 or later, see file LICENSE in this source tree.
6	*/
7
8	//config:config DPKG_DEB
9	//config: bool "dpkg_deb"
10	//config: default y
11	//config: select FEATURE_SEAMLESS_GZ
12	//config: help
13	//config: dpkg-deb unpacks and provides information about Debian archives.
14	//config:
15	//config: This implementation of dpkg-deb cannot pack archives.
16	//config:
17	//config: Unless you have a specific application which requires dpkg-deb,
18	//config: say N here.
19
20	//applet:IF_DPKG_DEB(APPLET_ODDNAME(dpkg-deb, dpkg_deb, BB_DIR_USR_BIN, BB_SUID_DROP, dpkg_deb))
21
22	//kbuild:lib-$(CONFIG_DPKG_DEB) += dpkg_deb.o
23
24	//usage:#define dpkg_deb_trivial_usage
25	//usage: "[-cefxX] FILE [DIR]"
26	//usage:#define dpkg_deb_full_usage "\n\n"
27	//usage: "Perform actions on Debian packages (.deb)\n"
28	//usage: "\n -c List files"
29	//usage: "\n -f Print control fields"
30	//usage: "\n -e Extract control files to DIR (default: ./DEBIAN)"
31	//usage: "\n -x Extract files to DIR (no default)"
32	//usage: "\n -X Verbose -x"
33	//usage:
34	//usage:#define dpkg_deb_example_usage
35	//usage: "$ dpkg-deb -X ./busybox_0.48-1_i386.deb /tmp\n"
36
37	#include "libbb.h"
38	#include "bb_archive.h"
39
40	#define DPKG_DEB_OPT_CONTENTS 1
41	#define DPKG_DEB_OPT_CONTROL 2
42	#define DPKG_DEB_OPT_FIELD 4
43	#define DPKG_DEB_OPT_EXTRACT_VERBOSE 8
44	#define DPKG_DEB_OPT_EXTRACT 16
45
46	int dpkg_deb_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
47	int dpkg_deb_main(int argc UNUSED_PARAM, char **argv)
48	{
49	archive_handle_t *ar_archive;
50	archive_handle_t *tar_archive;
51	llist_t *control_tar_llist = NULL;
52	unsigned opt;
53	const char *extract_dir;
54
55	/* Setup the tar archive handle */
56	tar_archive = init_handle();
57
58	/* Setup an ar archive handle that refers to the gzip sub archive */
59	ar_archive = init_handle();
60	ar_archive->dpkg__sub_archive = tar_archive;
61	ar_archive->filter = filter_accept_list_reassign;
62
63	llist_add_to(&ar_archive->accept, (char*)"data.tar");
64	llist_add_to(&control_tar_llist, (char*)"control.tar");
65	#if ENABLE_FEATURE_SEAMLESS_GZ
66	llist_add_to(&ar_archive->accept, (char*)"data.tar.gz");
67	llist_add_to(&control_tar_llist, (char*)"control.tar.gz");
68	#endif
69	#if ENABLE_FEATURE_SEAMLESS_BZ2
70	llist_add_to(&ar_archive->accept, (char*)"data.tar.bz2");
71	llist_add_to(&control_tar_llist, (char*)"control.tar.bz2");
72	#endif
73	#if ENABLE_FEATURE_SEAMLESS_LZMA
74	llist_add_to(&ar_archive->accept, (char*)"data.tar.lzma");
75	llist_add_to(&control_tar_llist, (char*)"control.tar.lzma");
76	#endif
77	#if ENABLE_FEATURE_SEAMLESS_XZ
78	llist_add_to(&ar_archive->accept, (char*)"data.tar.xz");
79	llist_add_to(&control_tar_llist, (char*)"control.tar.xz");
80	#endif
81
82	/* Must have 1 or 2 args */
83	opt_complementary = "-1:?2:c--efXx:e--cfXx:f--ceXx:X--cefx:x--cefX";
84	opt = getopt32(argv, "cefXx");
85	argv += optind;
86	//argc -= optind;
87
88	extract_dir = argv[1];
89	if (opt & DPKG_DEB_OPT_CONTENTS) { // -c
90	tar_archive->action_header = header_verbose_list;
91	if (extract_dir)
92	bb_show_usage();
93	}
94	if (opt & DPKG_DEB_OPT_FIELD) { // -f
95	/* Print the entire control file */
96	//TODO: standard tool accepts an optional list of fields to print
97	ar_archive->accept = control_tar_llist;
98	llist_add_to(&(tar_archive->accept), (char*)"./control");
99	tar_archive->filter = filter_accept_list;
100	tar_archive->action_data = data_extract_to_stdout;
101	if (extract_dir)
102	bb_show_usage();
103	}
104	if (opt & DPKG_DEB_OPT_CONTROL) { // -e
105	ar_archive->accept = control_tar_llist;
106	tar_archive->action_data = data_extract_all;
107	if (!extract_dir)
108	extract_dir = "./DEBIAN";
109	}
110	if (opt & (DPKG_DEB_OPT_EXTRACT_VERBOSE | DPKG_DEB_OPT_EXTRACT)) { // -Xx
111	if (opt & DPKG_DEB_OPT_EXTRACT_VERBOSE)
112	tar_archive->action_header = header_list;
113	tar_archive->action_data = data_extract_all;
114	if (!extract_dir)
115	bb_show_usage();
116	}
117
118	/* Standard tool supports "-" */
119	tar_archive->src_fd = ar_archive->src_fd = xopen_stdin(argv[0]);
120
121	if (extract_dir) {
122	mkdir(extract_dir, 0777); /* bb_make_directory(extract_dir, 0777, 0) */
123	xchdir(extract_dir);
124	}
125
126	/* Do it */
127	unpack_ar_archive(ar_archive);
128
129	/* Cleanup */
130	if (ENABLE_FEATURE_CLEAN_UP)
131	close(ar_archive->src_fd);
132
133	return EXIT_SUCCESS;
134	}
135