archival/libunarchive/filter_accept_list_reassign.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  *  Copyright (C) 2002 by Glenn McGrath
   4  *
   5  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   6  */
   7
   8 #include "libbb.h"
   9 #include "unarchive.h"
  10
  11 /* Built and used only if ENABLE_DPKG || ENABLE_DPKG_DEB */
  12
  13 /*
  14  * Reassign the subarchive metadata parser based on the filename extension
  15  * e.g. if its a .tar.gz modify archive_handle->sub_archive to process a .tar.gz
  16  * or if its a .tar.bz2 make archive_handle->sub_archive handle that
  17  */
  18 char FAST_FUNC filter_accept_list_reassign(archive_handle_t *archive_handle)
  19 {
  20         /* Check the file entry is in the accept list */
  21         if (find_list_entry(archive_handle->accept, archive_handle->file_header->name)) {
  22                 const char *name_ptr;
  23
  24                 /* Find extension */
  25                 name_ptr = strrchr(archive_handle->file_header->name, '.');
  26                 if (!name_ptr)
  27                         return EXIT_FAILURE;
  28                 name_ptr++;
  29
  30                 /* Modify the subarchive handler based on the extension */
  31                 if (ENABLE_FEATURE_SEAMLESS_GZ
  32                  && strcmp(name_ptr, "gz") == 0
  33                 ) {
  34                         archive_handle->dpkg__action_data_subarchive = get_header_tar_gz;
  35                         return EXIT_SUCCESS;
  36                 }
  37                 if (ENABLE_FEATURE_SEAMLESS_BZ2
  38                  && strcmp(name_ptr, "bz2") == 0
  39                 ) {
  40                         archive_handle->dpkg__action_data_subarchive = get_header_tar_bz2;
  41                         return EXIT_SUCCESS;
  42                 }
  43                 if (ENABLE_FEATURE_SEAMLESS_LZMA
  44                  && strcmp(name_ptr, "lzma") == 0
  45                 ) {
  46                         archive_handle->dpkg__action_data_subarchive = get_header_tar_lzma;
  47                         return EXIT_SUCCESS;
  48                 }
  49         }
  50         return EXIT_FAILURE;
  51 }