archival/dpkg_deb.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * dpkg-deb packs, unpacks and provides information about Debian archives.
   4  *
   5  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   6  */
   7
   8 //usage:#define dpkg_deb_trivial_usage
   9 //usage:       "[-cefxX] FILE [argument"
  10 //usage:#define dpkg_deb_full_usage "\n\n"
  11 //usage:       "Perform actions on Debian packages (.debs)\n"
  12 //usage:     "\nOptions:"
  13 //usage:     "\n        -c      List contents of filesystem tree"
  14 //usage:     "\n        -e      Extract control files to [argument] directory"
  15 //usage:     "\n        -f      Display control field name starting with [argument]"
  16 //usage:     "\n        -x      Extract packages filesystem tree to directory"
  17 //usage:     "\n        -X      Verbose extract"
  18 //usage:
  19 //usage:#define dpkg_deb_example_usage
  20 //usage:       "$ dpkg-deb -X ./busybox_0.48-1_i386.deb /tmp\n"
  21
  22 #include "libbb.h"
  23 #include "archive.h"
  24
  25 #define DPKG_DEB_OPT_CONTENTS         1
  26 #define DPKG_DEB_OPT_CONTROL          2
  27 #define DPKG_DEB_OPT_FIELD            4
  28 #define DPKG_DEB_OPT_EXTRACT          8
  29 #define DPKG_DEB_OPT_EXTRACT_VERBOSE 16
  30
  31 int dpkg_deb_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  32 int dpkg_deb_main(int argc, char **argv)
  33 {
  34         archive_handle_t *ar_archive;
  35         archive_handle_t *tar_archive;
  36         llist_t *control_tar_llist = NULL;
  37         unsigned opt;
  38         const char *extract_dir;
  39         int need_args;
  40
  41         /* Setup the tar archive handle */
  42         tar_archive = init_handle();
  43
  44         /* Setup an ar archive handle that refers to the gzip sub archive */
  45         ar_archive = init_handle();
  46         ar_archive->dpkg__sub_archive = tar_archive;
  47         ar_archive->filter = filter_accept_list_reassign;
  48
  49 #if ENABLE_FEATURE_SEAMLESS_GZ
  50         llist_add_to(&ar_archive->accept, (char*)"data.tar.gz");
  51         llist_add_to(&control_tar_llist, (char*)"control.tar.gz");
  52 #endif
  53 #if ENABLE_FEATURE_SEAMLESS_BZ2
  54         llist_add_to(&ar_archive->accept, (char*)"data.tar.bz2");
  55         llist_add_to(&control_tar_llist, (char*)"control.tar.bz2");
  56 #endif
  57 #if ENABLE_FEATURE_SEAMLESS_LZMA
  58         llist_add_to(&ar_archive->accept, (char*)"data.tar.lzma");
  59         llist_add_to(&control_tar_llist, (char*)"control.tar.lzma");
  60 #endif
  61
  62         opt_complementary = "c--efXx:e--cfXx:f--ceXx:X--cefx:x--cefX";
  63         opt = getopt32(argv, "cefXx");
  64         argv += optind;
  65         argc -= optind;
  66
  67         if (opt & DPKG_DEB_OPT_CONTENTS) {
  68                 tar_archive->action_header = header_verbose_list;
  69         }
  70         extract_dir = NULL;
  71         need_args = 1;
  72         if (opt & DPKG_DEB_OPT_CONTROL) {
  73                 ar_archive->accept = control_tar_llist;
  74                 tar_archive->action_data = data_extract_all;
  75                 if (1 == argc) {
  76                         extract_dir = "./DEBIAN";
  77                 } else {
  78                         need_args++;
  79                 }
  80         }
  81         if (opt & DPKG_DEB_OPT_FIELD) {
  82                 /* Print the entire control file
  83                  * it should accept a second argument which specifies a
  84                  * specific field to print */
  85                 ar_archive->accept = control_tar_llist;
  86                 llist_add_to(&(tar_archive->accept), (char*)"./control");
  87                 tar_archive->filter = filter_accept_list;
  88                 tar_archive->action_data = data_extract_to_stdout;
  89         }
  90         if (opt & DPKG_DEB_OPT_EXTRACT) {
  91                 tar_archive->action_header = header_list;
  92         }
  93         if (opt & (DPKG_DEB_OPT_EXTRACT_VERBOSE | DPKG_DEB_OPT_EXTRACT)) {
  94                 tar_archive->action_data = data_extract_all;
  95                 need_args = 2;
  96         }
  97
  98         if (need_args != argc) {
  99                 bb_show_usage();
 100         }
 101
 102         tar_archive->src_fd = ar_archive->src_fd = xopen(argv[0], O_RDONLY);
 103
 104         /* Work out where to extract the files */
 105         /* 2nd argument is a dir name */
 106         if (argv[1]) {
 107                 extract_dir = argv[1];
 108         }
 109         if (extract_dir) {
 110                 mkdir(extract_dir, 0777); /* bb_make_directory(extract_dir, 0777, 0) */
 111                 xchdir(extract_dir);
 112         }
 113
 114         /* Do it */
 115         unpack_ar_archive(ar_archive);
 116
 117         /* Cleanup */
 118         if (ENABLE_FEATURE_CLEAN_UP)
 119                 close(ar_archive->src_fd);
 120
 121         return EXIT_SUCCESS;
 122 }