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 "unarchive.h"
  21 #include "busybox.h"
  22
  23 extern int dpkg_deb_main(int argc, char **argv)
  24 {
  25         char *prefix = NULL;
  26         char *filename = NULL;
  27         char *output_buffer = NULL;
  28         int opt = 0;
  29         int arg_type = 0;
  30         int deb_extract_funct = extract_create_leading_dirs | extract_unconditional;
  31
  32         const int arg_type_prefix = 1;
  33         const int arg_type_field = 2;
  34         const int arg_type_filename = 4;
  35 //      const int arg_type_un_ar_gz = 8;
  36
  37         while ((opt = getopt(argc, argv, "ceftXxI")) != -1) {
  38                 switch (opt) {
  39                         case 'c':
  40                                 deb_extract_funct |= extract_data_tar_gz;
  41                                 deb_extract_funct |= extract_verbose_list;
  42                                 break;
  43                         case 'e':
  44                                 arg_type = arg_type_prefix;
  45                                 deb_extract_funct |= extract_control_tar_gz;
  46                                 deb_extract_funct |= extract_all_to_fs;
  47                                 break;
  48                         case 'f':
  49                                 arg_type = arg_type_field;
  50                                 deb_extract_funct |= extract_control_tar_gz;
  51                                 deb_extract_funct |= extract_one_to_buffer;
  52                                 filename = xstrdup("./control");
  53                                 break;
  54                         case 't': /* --fsys-tarfile, i just made up this short name */
  55                                 /* Integrate the functionality needed with some code from ar.c */
  56                                 error_msg_and_die("Option disabled");
  57 //                              arg_type = arg_type_un_ar_gz;
  58                                 break;
  59                         case 'X':
  60                                 arg_type = arg_type_prefix;
  61                                 deb_extract_funct |= extract_data_tar_gz;
  62                                 deb_extract_funct |= extract_all_to_fs;
  63                                 deb_extract_funct |= extract_list;
  64                         case 'x':
  65                                 arg_type = arg_type_prefix;
  66                                 deb_extract_funct |= extract_data_tar_gz;
  67                                 deb_extract_funct |= extract_all_to_fs;
  68                                 break;
  69                         case 'I':
  70                                 arg_type = arg_type_filename;
  71                                 deb_extract_funct |= extract_control_tar_gz;
  72                                 deb_extract_funct |= extract_one_to_buffer;
  73                                 break;
  74                         default:
  75                                 show_usage();
  76                 }
  77         }
  78
  79         if (optind == argc)  {
  80                 show_usage();
  81         }
  82
  83         /* Workout where to extract the files */
  84         if (arg_type == arg_type_prefix) {
  85                 /* argument is a dir name */
  86                 if ((optind + 1) == argc ) {
  87                         prefix = xstrdup("./DEBIAN/");
  88                 } else {
  89                         prefix = (char *) xmalloc(strlen(argv[optind + 1]) + 2);
  90                         strcpy(prefix, argv[optind + 1]);
  91                         /* Make sure the directory has a trailing '/' */
  92                         if (last_char_is(prefix, '/') == NULL) {
  93                                 strcat(prefix, "/");
  94                         }
  95                 }
  96                 mkdir(prefix, 0777);
  97         }
  98
  99         if (arg_type == arg_type_filename) {
 100                 if ((optind + 1) != argc) {
 101                         filename = xstrdup(argv[optind + 1]);
 102                 } else {
 103                         error_msg_and_die("-I currently requires a filename to be specified");
 104                 }
 105         }
 106
 107         output_buffer = deb_extract(argv[optind], stdout, deb_extract_funct, prefix, filename);
 108
 109         if ((arg_type == arg_type_filename) && (output_buffer != NULL)) {
 110                 puts(output_buffer);
 111         }
 112         else if (arg_type == arg_type_field) {
 113                 char *field = NULL;
 114                 char *name;
 115                 char *value;
 116                 int field_start = 0;
 117
 118                 while (1) {
 119                         field_start += read_package_field(&output_buffer[field_start], &name, &value);
 120                         if (name == NULL) {
 121                                 break;
 122                         }
 123                         if (strcmp(name, argv[optind + 1]) == 0) {
 124                                 puts(value);
 125                         }
 126                         free(field);
 127                 }
 128         }
 129
 130         return(EXIT_SUCCESS);
 131 }