u-tools/apps/busybox/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 tarball for details.
   6  */
   7 #include "libbb.h"
   8 #include "unarchive.h"
   9
  10 #define DPKG_DEB_OPT_CONTENTS   1
  11 #define DPKG_DEB_OPT_CONTROL    2
  12 #define DPKG_DEB_OPT_FIELD      4
  13 #define DPKG_DEB_OPT_EXTRACT    8
  14 #define DPKG_DEB_OPT_EXTRACT_VERBOSE    16
  15
  16 int dpkg_deb_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  17 int dpkg_deb_main(int argc, char **argv)
  18 {
  19         archive_handle_t *ar_archive;
  20         archive_handle_t *tar_archive;
  21         llist_t *control_tar_llist = NULL;
  22         unsigned opt;
  23         const char *extract_dir;
  24         int need_args;
  25
  26         /* Setup the tar archive handle */
  27         tar_archive = init_handle();
  28
  29         /* Setup an ar archive handle that refers to the gzip sub archive */
  30         ar_archive = init_handle();
  31         ar_archive->sub_archive = tar_archive;
  32         ar_archive->filter = filter_accept_list_reassign;
  33
  34 #if ENABLE_FEATURE_SEAMLESS_GZ
  35         llist_add_to(&(ar_archive->accept), (char*)"data.tar.gz");
  36         llist_add_to(&control_tar_llist, (char*)"control.tar.gz");
  37 #endif
  38
  39 #if ENABLE_FEATURE_SEAMLESS_BZ2
  40         llist_add_to(&(ar_archive->accept), (char*)"data.tar.bz2");
  41         llist_add_to(&control_tar_llist, (char*)"control.tar.bz2");
  42 #endif
  43
  44         opt_complementary = "c--efXx:e--cfXx:f--ceXx:X--cefx:x--cefX";
  45         opt = getopt32(argv, "cefXx");
  46         argv += optind;
  47         argc -= optind;
  48
  49         if (opt & DPKG_DEB_OPT_CONTENTS) {
  50                 tar_archive->action_header = header_verbose_list;
  51         }
  52         extract_dir = NULL;
  53         need_args = 1;
  54         if (opt & DPKG_DEB_OPT_CONTROL) {
  55                 ar_archive->accept = control_tar_llist;
  56                 tar_archive->action_data = data_extract_all;
  57                 if (1 == argc) {
  58                         extract_dir = "./DEBIAN";
  59                 } else {
  60                         need_args++;
  61                 }
  62         }
  63         if (opt & DPKG_DEB_OPT_FIELD) {
  64                 /* Print the entire control file
  65                  * it should accept a second argument which specifies a
  66                  * specific field to print */
  67                 ar_archive->accept = control_tar_llist;
  68                 llist_add_to(&(tar_archive->accept), (char*)"./control");
  69                 tar_archive->filter = filter_accept_list;
  70                 tar_archive->action_data = data_extract_to_stdout;
  71         }
  72         if (opt & DPKG_DEB_OPT_EXTRACT) {
  73                 tar_archive->action_header = header_list;
  74         }
  75         if (opt & (DPKG_DEB_OPT_EXTRACT_VERBOSE | DPKG_DEB_OPT_EXTRACT)) {
  76                 tar_archive->action_data = data_extract_all;
  77                 need_args = 2;
  78         }
  79
  80         if (need_args != argc) {
  81                 bb_show_usage();
  82         }
  83
  84         tar_archive->src_fd = ar_archive->src_fd = xopen(argv[0], O_RDONLY);
  85
  86         /* Work out where to extract the files */
  87         /* 2nd argument is a dir name */
  88         if (argv[1]) {
  89                 extract_dir = argv[1];
  90         }
  91         if (extract_dir) {
  92                 mkdir(extract_dir, 0777); /* bb_make_directory(extract_dir, 0777, 0) */
  93                 xchdir(extract_dir);
  94         }
  95
  96         /* Do it */
  97         unpack_ar_archive(ar_archive);
  98
  99         /* Cleanup */
 100         if (ENABLE_FEATURE_CLEAN_UP)
 101                 close(ar_archive->src_fd);
 102
 103         return EXIT_SUCCESS;
 104 }