1 /* vi: set sw=4 ts=4: */
3 * Mini ar implementation for busybox
5 * Copyright (C) 2000 by Glenn McGrath
7 * Based in part on BusyBox tar, Debian dpkg-deb and GNU ar.
9 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
11 * There is no single standard to adhere to so ar may not portable
12 * between different systems
13 * http://www.unix-systems.org/single_unix_specification_v2/xcu/ar.html
17 #include "unarchive.h"
19 static void header_verbose_list_ar(const file_header_t *file_header)
21 const char *mode = bb_mode_string(file_header->mode);
24 mtime = ctime(&file_header->mtime);
26 memmove(&mtime[17], &mtime[20], 4);
28 printf("%s %d/%d%7d %s %s\n", &mode[1], file_header->uid, file_header->gid,
29 (int) file_header->size, &mtime[4], file_header->name);
32 #define AR_CTX_PRINT 0x01
33 #define AR_CTX_LIST 0x02
34 #define AR_CTX_EXTRACT 0x04
35 #define AR_OPT_PRESERVE_DATE 0x08
36 #define AR_OPT_VERBOSE 0x10
37 #define AR_OPT_CREATE 0x20
38 #define AR_OPT_INSERT 0x40
40 int ar_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
41 int ar_main(int argc, char **argv)
43 static const char msg_unsupported_err[] ALIGN1 =
44 "archive %s is not supported";
46 archive_handle_t *archive_handle;
50 archive_handle = init_handle();
52 /* Prepend '-' to the first argument if required */
53 opt_complementary = "--:p:t:x:-1:p--tx:t--px:x--pt";
54 opt = getopt32(argv, "ptxovcr");
56 if (opt & AR_CTX_PRINT) {
57 archive_handle->action_data = data_extract_to_stdout;
59 if (opt & AR_CTX_LIST) {
60 archive_handle->action_header = header_list;
62 if (opt & AR_CTX_EXTRACT) {
63 archive_handle->action_data = data_extract_all;
65 if (opt & AR_OPT_PRESERVE_DATE) {
66 archive_handle->flags |= ARCHIVE_PRESERVE_DATE;
68 if (opt & AR_OPT_VERBOSE) {
69 archive_handle->action_header = header_verbose_list_ar;
71 if (opt & AR_OPT_CREATE) {
72 bb_error_msg_and_die(msg_unsupported_err, "creation");
74 if (opt & AR_OPT_INSERT) {
75 bb_error_msg_and_die(msg_unsupported_err, "insertion");
78 archive_handle->src_fd = xopen(argv[optind++], O_RDONLY);
80 while (optind < argc) {
81 archive_handle->filter = filter_accept_list;
82 llist_add_to(&(archive_handle->accept), argv[optind++]);
85 xread(archive_handle->src_fd, magic, 7);
86 if (strncmp(magic, "!<arch>", 7) != 0) {
87 bb_error_msg_and_die("invalid ar magic");
89 archive_handle->offset += 7;
91 while (get_header_ar(archive_handle) == EXIT_SUCCESS)