archival/dpkg_deb.c

   1 /*
   2  *  This program is free software; you can redistribute it and/or modify
   3  *  it under the terms of the GNU General Public License as published by
   4  *  the Free Software Foundation; either version 2 of the License, or
   5  *  (at your option) any later version.
   6  *
   7  *  This program is distributed in the hope that it will be useful,
   8  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  *  GNU Library General Public License for more details.
  11  *
  12  *  You should have received a copy of the GNU General Public License
  13  *  along with this program; if not, write to the Free Software
  14  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  15  */
  16
  17 #include <stdlib.h>
  18 #include <string.h>
  19 #include <getopt.h>
  20 #include "busybox.h"
  21
  22 extern int dpkg_deb_main(int argc, char **argv)
  23 {
  24         char *prefix = NULL;
  25         char *filename = NULL;
  26         char *output_buffer = NULL;
  27         int opt = 0;
  28         int arg_type = 0;
  29         int deb_extract_funct = extract_create_leading_dirs | extract_unconditional;
  30
  31         const int arg_type_prefix = 1;
  32         const int arg_type_field = 2;
  33         const int arg_type_filename = 4;
  34 //      const int arg_type_un_ar_gz = 8;
  35
  36         while ((opt = getopt(argc, argv, "ceftXxI")) != -1) {
  37                 switch (opt) {
  38                         case 'c':
  39                                 deb_extract_funct |= extract_data_tar_gz;
  40                                 deb_extract_funct |= extract_verbose_list;
  41                                 break;
  42                         case 'e':
  43                                 arg_type = arg_type_prefix;
  44                                 deb_extract_funct |= extract_control_tar_gz;
  45                                 deb_extract_funct |= extract_all_to_fs;
  46                                 break;
  47                         case 'f':
  48                                 arg_type = arg_type_field;
  49                                 deb_extract_funct |= extract_control_tar_gz;
  50                                 deb_extract_funct |= extract_one_to_buffer;
  51                                 filename = xstrdup("./control");
  52                                 break;
  53                         case 't': /* --fsys-tarfile, i just made up this short name */
  54                                 /* Integrate the functionality needed with some code from ar.c */
  55                                 error_msg_and_die("Option disabled");
  56 //                              arg_type = arg_type_un_ar_gz;
  57                                 break;
  58                         case 'X':
  59                                 arg_type = arg_type_prefix;
  60                                 deb_extract_funct |= extract_data_tar_gz;
  61                                 deb_extract_funct |= extract_all_to_fs;
  62                                 deb_extract_funct |= extract_list;
  63                         case 'x':
  64                                 arg_type = arg_type_prefix;
  65                                 deb_extract_funct |= extract_data_tar_gz;
  66                                 deb_extract_funct |= extract_all_to_fs;
  67                                 break;
  68                         case 'I':
  69                                 arg_type = arg_type_filename;
  70                                 deb_extract_funct |= extract_control_tar_gz;
  71                                 deb_extract_funct |= extract_one_to_buffer;
  72                                 break;
  73                         default:
  74                                 show_usage();
  75                 }
  76         }
  77
  78         if (optind == argc)  {
  79                 show_usage();
  80         }
  81
  82         /* Workout where to extract the files */
  83         if (arg_type == arg_type_prefix) {
  84                 /* argument is a dir name */
  85                 if ((optind + 1) == argc ) {
  86                         prefix = xstrdup("./DEBIAN/");
  87                 } else {
  88                         prefix = (char *) xmalloc(strlen(argv[optind + 1]) + 2);
  89                         strcpy(prefix, argv[optind + 1]);
  90                         /* Make sure the directory has a trailing '/' */
  91                         if (last_char_is(prefix, '/') == NULL) {
  92                                 strcat(prefix, "/");
  93                         }
  94                 }
  95                 mkdir(prefix, 0777);
  96         }
  97
  98         if (arg_type == arg_type_filename) {
  99                 if ((optind + 1) != argc) {
 100                         filename = xstrdup(argv[optind + 1]);
 101                 } else {
 102                         error_msg_and_die("-I currently requires a filename to be specified");
 103                 }
 104         }
 105
 106         output_buffer = deb_extract(argv[optind], stdout, deb_extract_funct, prefix, filename);
 107
 108         if ((arg_type == arg_type_filename) && (output_buffer != NULL)) {
 109                 puts(output_buffer);
 110         }
 111         else if (arg_type == arg_type_field) {
 112                 char *field = NULL;
 113                 char *name;
 114                 char *value;
 115                 int field_start = 0;
 116
 117                 while (1) {
 118                         field_start += read_package_field(&output_buffer[field_start], &name, &value);
 119                         if (name == NULL) {
 120                                 break;
 121                         }
 122                         if (strcmp(name, argv[optind + 1]) == 0) {
 123                                 puts(value);
 124                         }
 125                         free(field);
 126                 }
 127         }
 128
 129         return(EXIT_SUCCESS);
 130 }