1/* vi: set sw=4 ts=4: */
2/*
3 * Mini cpio implementation for busybox
4 *
5 * Copyright (C) 2001 by Glenn McGrath
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8 *
9 * Limitations:
10 *		Doesn't check CRC's
11 *		Only supports new ASCII and CRC formats
12 *
13 */
14#include "libbb.h"
15#include "unarchive.h"
16
17#define CPIO_OPT_EXTRACT                0x01
18#define CPIO_OPT_TEST                   0x02
19#define CPIO_OPT_UNCONDITIONAL          0x04
20#define CPIO_OPT_VERBOSE                0x08
21#define CPIO_OPT_FILE                   0x10
22#define CPIO_OPT_CREATE_LEADING_DIR     0x20
23#define CPIO_OPT_PRESERVE_MTIME         0x40
24
25int cpio_main(int argc, char **argv);
26int cpio_main(int argc, char **argv)
27{
28	archive_handle_t *archive_handle;
29	char *cpio_filename = NULL;
30	unsigned opt;
31
32	/* Initialise */
33	archive_handle = init_handle();
34	archive_handle->src_fd = STDIN_FILENO;
35	archive_handle->seek = seek_by_read;
36	archive_handle->flags = ARCHIVE_EXTRACT_NEWER | ARCHIVE_PRESERVE_DATE;
37
38	opt = getopt32(argv, "ituvF:dm", &cpio_filename);
39
40	/* One of either extract or test options must be given */
41	if ((opt & (CPIO_OPT_TEST | CPIO_OPT_EXTRACT)) == 0) {
42		bb_show_usage();
43	}
44
45	if (opt & CPIO_OPT_TEST) {
46		/* if both extract and test options are given, ignore extract option */
47		if (opt & CPIO_OPT_EXTRACT) {
48			opt &= ~CPIO_OPT_EXTRACT;
49		}
50		archive_handle->action_header = header_list;
51	}
52	if (opt & CPIO_OPT_EXTRACT) {
53		archive_handle->action_data = data_extract_all;
54	}
55	if (opt & CPIO_OPT_UNCONDITIONAL) {
56		archive_handle->flags |= ARCHIVE_EXTRACT_UNCONDITIONAL;
57		archive_handle->flags &= ~ARCHIVE_EXTRACT_NEWER;
58	}
59	if (opt & CPIO_OPT_VERBOSE) {
60		if (archive_handle->action_header == header_list) {
61			archive_handle->action_header = header_verbose_list;
62		} else {
63			archive_handle->action_header = header_list;
64		}
65	}
66	if (cpio_filename) { /* CPIO_OPT_FILE */
67		archive_handle->src_fd = xopen(cpio_filename, O_RDONLY);
68		archive_handle->seek = seek_by_jump;
69	}
70	if (opt & CPIO_OPT_CREATE_LEADING_DIR) {
71		archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS;
72	}
73
74	while (optind < argc) {
75		archive_handle->filter = filter_accept_list;
76		llist_add_to(&(archive_handle->accept), argv[optind]);
77		optind++;
78	}
79
80	while (get_header_cpio(archive_handle) == EXIT_SUCCESS);
81
82	return EXIT_SUCCESS;
83}
84