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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