libopkg/pkg_extract.c

   1 /* pkg_extract.c - the opkg package management system
   2
   3    Carl D. Worth
   4
   5    Copyright (C) 2001 University of Southern California
   6
   7    This program is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU General Public License as
   9    published by the Free Software Foundation; either version 2, or (at
  10    your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16 */
  17
  18 #include "includes.h"
  19 #include <errno.h>
  20
  21 #include "pkg_extract.h"
  22
  23 #include "libbb/libbb.h"
  24 #include "file_util.h"
  25 #include "sprintf_alloc.h"
  26
  27 /* assuage libb functions */
  28 const char *applet_name = "opkg";
  29
  30 int pkg_extract_control_file_to_stream(pkg_t *pkg, FILE *stream)
  31 {
  32     char *buffer = deb_extract(pkg->local_filename, stderr,
  33                                extract_control_tar_gz
  34                                | extract_one_to_buffer,
  35                                NULL, "./control");
  36     if (buffer == NULL) {
  37         return EINVAL;
  38     }
  39
  40     fputs(buffer, stream);
  41     free(buffer);
  42
  43     return 0;
  44 }
  45
  46 int pkg_extract_control_files_to_dir(pkg_t *pkg, const char *dir)
  47 {
  48     return pkg_extract_control_files_to_dir_with_prefix(pkg, dir, "");
  49 }
  50
  51 int pkg_extract_control_files_to_dir_with_prefix(pkg_t *pkg,
  52                                                  const char *dir,
  53                                                  const char *prefix)
  54 {
  55     char *dir_with_prefix;
  56     char *buffer = NULL;
  57
  58     sprintf_alloc(&dir_with_prefix, "%s/%s", dir, prefix);
  59
  60     buffer = deb_extract(pkg->local_filename, stderr,
  61                 extract_control_tar_gz
  62                 | extract_all_to_fs| extract_preserve_date
  63                 | extract_unconditional,
  64                 dir_with_prefix, NULL);
  65
  66     free(dir_with_prefix);
  67
  68     if (buffer == NULL) {
  69         return EINVAL;
  70     }
  71     free(buffer);
  72     return 0;
  73 }
  74
  75 int pkg_extract_data_files_to_dir(pkg_t *pkg, const char *dir)
  76 {
  77     char *buffer = NULL;
  78     buffer = deb_extract(pkg->local_filename, stderr,
  79                 extract_data_tar_gz
  80                 | extract_all_to_fs| extract_preserve_date
  81                 | extract_unconditional,
  82                 dir, NULL);
  83
  84     if (buffer == NULL) {
  85         return EINVAL;
  86     }
  87     free(buffer);
  88     return 0;
  89 }
  90
  91 int pkg_extract_data_file_names_to_file(pkg_t *pkg, const char *file_name)
  92 {
  93      int err=0;
  94      char *line, *data_file;
  95      FILE *file;
  96      FILE *tmp;
  97
  98      file = fopen(file_name, "w");
  99      if (file == NULL) {
 100           fprintf(stderr, "%s: ERROR: Failed to open %s for writing.\n",
 101                   __FUNCTION__, file_name);
 102           return EINVAL;
 103      }
 104
 105      tmp = tmpfile();
 106      if (pkg->installed_files) {
 107           str_list_elt_t *elt;
 108           for (elt = str_list_first(pkg->installed_files); elt; elt = str_list_next(pkg->installed_files, elt)) {
 109                fprintf(file, "%s\n", (char *)elt->data);
 110           }
 111      } else {
 112           err = pkg_extract_data_file_names_to_stream(pkg, tmp);
 113           if (err) {
 114                fclose(file);
 115                fclose(tmp);
 116                return err;
 117           }
 118
 119           /* Fixup data file names by removing the initial '.' */
 120           rewind(tmp);
 121           while (1) {
 122                line = file_read_line_alloc(tmp);
 123                if (line == NULL) {
 124                     break;
 125                }
 126
 127                data_file = line;
 128                if (*data_file == '.') {
 129                     data_file++;
 130                }
 131
 132                if (*data_file != '/') {
 133                     fputs("/", file);
 134                }
 135
 136                /* I have no idea why, but this is what dpkg does */
 137                if (strcmp(data_file, "/\n") == 0) {
 138                     fputs("/.\n", file);
 139                } else {
 140                     fputs(data_file, file);
 141                }
 142                free(line);
 143                line=NULL;
 144           }
 145      }
 146      fclose(tmp);
 147      fclose(file);
 148
 149      return err;
 150 }
 151
 152 int pkg_extract_data_file_names_to_stream(pkg_t *pkg, FILE *file)
 153 {
 154     char *buffer = NULL;
 155     /* XXX: DPKG_INCOMPATIBILITY: deb_extract will extract all of the
 156        data file names with a '.' as the first character. I've taught
 157        opkg how to cope with the presence or absence of the '.', but
 158        this may trip up dpkg.
 159
 160        For all I know, this could actually be a bug in opkg-build. So,
 161        I'll have to try installing some .debs and comparing the *.list
 162        files.
 163
 164        If we wanted to, we could workaround the deb_extract behavior
 165        right here, by writing to a tmpfile, then munging things as we
 166        wrote to the actual stream. */
 167     buffer = deb_extract(pkg->local_filename, file,
 168                  extract_quiet | extract_data_tar_gz | extract_list,
 169                  NULL, NULL);
 170
 171     /* BUG: How do we know if deb_extract worked or not? This is a
 172        defect in the current deb_extract from what I can tell. */
 173     if (buffer == NULL) {
 174         return EINVAL;
 175     }
 176     free(buffer);
 177     return 0;
 178 }