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     deb_extract(pkg->local_filename, stream,
  33                                extract_control_tar_gz
  34                                | extract_to_stdout, /* to stream actually */
  35                                NULL, "./control");
  36
  37     return 0;
  38 }
  39
  40 int pkg_extract_control_files_to_dir(pkg_t *pkg, const char *dir)
  41 {
  42     return pkg_extract_control_files_to_dir_with_prefix(pkg, dir, "");
  43 }
  44
  45 int pkg_extract_control_files_to_dir_with_prefix(pkg_t *pkg,
  46                                                  const char *dir,
  47                                                  const char *prefix)
  48 {
  49     char *dir_with_prefix;
  50     char *buffer = NULL;
  51
  52     sprintf_alloc(&dir_with_prefix, "%s/%s", dir, prefix);
  53
  54     buffer = deb_extract(pkg->local_filename, stderr,
  55                 extract_control_tar_gz
  56                 | extract_all_to_fs| extract_preserve_date
  57                 | extract_unconditional,
  58                 dir_with_prefix, NULL);
  59
  60     free(dir_with_prefix);
  61
  62     /* BUG: How do we know if deb_extract worked or not? This is a
  63        defect in the current deb_extract from what I can tell. */
  64
  65     if (buffer) {
  66         free(buffer);
  67     }
  68     return 0;
  69 }
  70
  71 int pkg_extract_data_files_to_dir(pkg_t *pkg, const char *dir)
  72 {
  73     char *buffer = NULL;
  74     buffer = deb_extract(pkg->local_filename, stderr,
  75                 extract_data_tar_gz
  76                 | extract_all_to_fs| extract_preserve_date
  77                 | extract_unconditional,
  78                 dir, NULL);
  79
  80     /* BUG: How do we know if deb_extract worked or not? This is a
  81        defect in the current deb_extract from what I can tell. */
  82
  83     if (buffer) {
  84         free(buffer);
  85     }
  86     return 0;
  87 }
  88
  89 int pkg_extract_data_file_names_to_stream(pkg_t *pkg, FILE *file)
  90 {
  91     char *buffer = NULL;
  92     /* XXX: DPKG_INCOMPATIBILITY: deb_extract will extract all of the
  93        data file names with a '.' as the first character. I've taught
  94        opkg how to cope with the presence or absence of the '.', but
  95        this may trip up dpkg.
  96
  97        For all I know, this could actually be a bug in opkg-build. So,
  98        I'll have to try installing some .debs and comparing the *.list
  99        files.
 100
 101        If we wanted to, we could workaround the deb_extract behavior
 102        right here, by writing to a tmpfile, then munging things as we
 103        wrote to the actual stream. */
 104     buffer = deb_extract(pkg->local_filename, file,
 105                  extract_quiet | extract_data_tar_gz | extract_list,
 106                  NULL, NULL);
 107
 108     /* BUG: How do we know if deb_extract worked or not? This is a
 109        defect in the current deb_extract from what I can tell. */
 110     if (buffer) {
 111         free(buffer);
 112     }
 113     return 0;
 114 }