| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini ar implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 2000 by Glenn McGrath
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| 6 | * Written by Glenn McGrath <bug1@iinet.net.au> 1 June 2000
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| 7 | *
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| 8 | * Based in part on BusyBox tar, Debian dpkg-deb and GNU ar.
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| 9 | *
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| 10 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 11 | *
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| 12 | * There is no single standard to adhere to so ar may not portable
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| 13 | * between different systems
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| 14 | * http://www.unix-systems.org/single_unix_specification_v2/xcu/ar.html
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| 15 | */
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| 16 |
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| 17 | #include "libbb.h"
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| 18 | #include "unarchive.h"
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| 19 |
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| 20 | static void header_verbose_list_ar(const file_header_t *file_header)
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| 21 | {
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| 22 | const char *mode = bb_mode_string(file_header->mode);
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| 23 | char *mtime;
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| 24 |
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| 25 | mtime = ctime(&file_header->mtime);
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| 26 | mtime[16] = ' ';
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| 27 | memmove(&mtime[17], &mtime[20], 4);
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| 28 | mtime[21] = '\0';
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| 29 | printf("%s %d/%d%7d %s %s\n", &mode[1], file_header->uid, file_header->gid,
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| 30 | (int) file_header->size, &mtime[4], file_header->name);
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| 31 | }
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| 32 |
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| 33 | #define AR_CTX_PRINT 0x01
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| 34 | #define AR_CTX_LIST 0x02
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| 35 | #define AR_CTX_EXTRACT 0x04
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| 36 | #define AR_OPT_PRESERVE_DATE 0x08
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| 37 | #define AR_OPT_VERBOSE 0x10
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| 38 | #define AR_OPT_CREATE 0x20
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| 39 | #define AR_OPT_INSERT 0x40
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| 40 |
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| 41 | int ar_main(int argc, char **argv);
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| 42 | int ar_main(int argc, char **argv)
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| 43 | {
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| 44 | static const char msg_unsupported_err[] ALIGN1 =
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| 45 | "archive %s is not supported";
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| 46 |
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| 47 | archive_handle_t *archive_handle;
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| 48 | unsigned opt;
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| 49 | char magic[8];
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| 50 |
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| 51 | archive_handle = init_handle();
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| 52 |
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| 53 | /* Prepend '-' to the first argument if required */
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| 54 | opt_complementary = "--:p:t:x:-1:p--tx:t--px:x--pt";
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| 55 | opt = getopt32(argv, "ptxovcr");
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| 56 |
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| 57 | if (opt & AR_CTX_PRINT) {
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| 58 | archive_handle->action_data = data_extract_to_stdout;
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| 59 | }
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| 60 | if (opt & AR_CTX_LIST) {
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| 61 | archive_handle->action_header = header_list;
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| 62 | }
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| 63 | if (opt & AR_CTX_EXTRACT) {
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| 64 | archive_handle->action_data = data_extract_all;
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| 65 | }
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| 66 | if (opt & AR_OPT_PRESERVE_DATE) {
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| 67 | archive_handle->flags |= ARCHIVE_PRESERVE_DATE;
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| 68 | }
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| 69 | if (opt & AR_OPT_VERBOSE) {
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| 70 | archive_handle->action_header = header_verbose_list_ar;
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| 71 | }
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| 72 | if (opt & AR_OPT_CREATE) {
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| 73 | bb_error_msg_and_die(msg_unsupported_err, "creation");
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| 74 | }
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| 75 | if (opt & AR_OPT_INSERT) {
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| 76 | bb_error_msg_and_die(msg_unsupported_err, "insertion");
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| 77 | }
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| 78 |
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| 79 | archive_handle->src_fd = xopen(argv[optind++], O_RDONLY);
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| 80 |
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| 81 | while (optind < argc) {
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| 82 | archive_handle->filter = filter_accept_list;
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| 83 | llist_add_to(&(archive_handle->accept), argv[optind++]);
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| 84 | }
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| 85 |
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| 86 | xread(archive_handle->src_fd, magic, 7);
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| 87 | if (strncmp(magic, "!<arch>", 7) != 0) {
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| 88 | bb_error_msg_and_die("invalid ar magic");
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| 89 | }
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| 90 | archive_handle->offset += 7;
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| 91 |
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| 92 | while (get_header_ar(archive_handle) == EXIT_SUCCESS)
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| 93 | continue;
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| 94 |
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| 95 | return EXIT_SUCCESS;
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| 96 | }
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