u-tools/apps/busybox/archival/ar.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini ar implementation for busybox
   4  *
   5  * Copyright (C) 2000 by Glenn McGrath
   6  *
   7  * Based in part on BusyBox tar, Debian dpkg-deb and GNU ar.
   8  *
   9  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  10  *
  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
  14  */
  15
  16 #include "libbb.h"
  17 #include "unarchive.h"
  18
  19 static void FAST_FUNC header_verbose_list_ar(const file_header_t *file_header)
  20 {
  21         const char *mode = bb_mode_string(file_header->mode);
  22         char *mtime;
  23
  24         mtime = ctime(&file_header->mtime);
  25         mtime[16] = ' ';
  26         memmove(&mtime[17], &mtime[20], 4);
  27         mtime[21] = '\0';
  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);
  30 }
  31
  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
  39
  40 int ar_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  41 int ar_main(int argc, char **argv)
  42 {
  43         static const char msg_unsupported_err[] ALIGN1 =
  44                 "archive %s is not supported";
  45
  46         archive_handle_t *archive_handle;
  47         unsigned opt;
  48
  49         archive_handle = init_handle();
  50
  51         /* Prepend '-' to the first argument if required */
  52         opt_complementary = "--:p:t:x:-1:p--tx:t--px:x--pt";
  53         opt = getopt32(argv, "ptxovcr");
  54
  55         if (opt & AR_CTX_PRINT) {
  56                 archive_handle->action_data = data_extract_to_stdout;
  57         }
  58         if (opt & AR_CTX_LIST) {
  59                 archive_handle->action_header = header_list;
  60         }
  61         if (opt & AR_CTX_EXTRACT) {
  62                 archive_handle->action_data = data_extract_all;
  63         }
  64         if (opt & AR_OPT_PRESERVE_DATE) {
  65                 archive_handle->ah_flags |= ARCHIVE_PRESERVE_DATE;
  66         }
  67         if (opt & AR_OPT_VERBOSE) {
  68                 archive_handle->action_header = header_verbose_list_ar;
  69         }
  70         if (opt & AR_OPT_CREATE) {
  71                 bb_error_msg_and_die(msg_unsupported_err, "creation");
  72         }
  73         if (opt & AR_OPT_INSERT) {
  74                 bb_error_msg_and_die(msg_unsupported_err, "insertion");
  75         }
  76
  77         archive_handle->src_fd = xopen(argv[optind++], O_RDONLY);
  78
  79         while (optind < argc) {
  80                 archive_handle->filter = filter_accept_list;
  81                 llist_add_to(&(archive_handle->accept), argv[optind++]);
  82         }
  83
  84         unpack_ar_archive(archive_handle);
  85
  86         return EXIT_SUCCESS;
  87 }