libopkg/opkg_download.c

   1 /* vi: set noexpandtab sw=4 sts=4: */
   2 /* opkg_download.c - the opkg package management system
   3
   4    Carl D. Worth
   5
   6    Copyright (C) 2001 University of Southern California
   7    Copyright (C) 2008 OpenMoko Inc
   8
   9    This program is free software; you can redistribute it and/or
  10    modify it under the terms of the GNU General Public License as
  11    published by the Free Software Foundation; either version 2, or (at
  12    your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful, but
  15    WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17    General Public License for more details.
  18 */
  19
  20 #include <stdio.h>
  21 #include <unistd.h>
  22 #include <libgen.h>
  23
  24 #include "opkg_download.h"
  25 #include "opkg_message.h"
  26
  27 #include "sprintf_alloc.h"
  28 #include "xsystem.h"
  29 #include "file_util.h"
  30 #include "opkg_defines.h"
  31 #include "libbb/libbb.h"
  32
  33 static int str_starts_with(const char *str, const char *prefix)
  34 {
  35         return (strncmp(str, prefix, strlen(prefix)) == 0);
  36 }
  37
  38 int
  39 opkg_download(const char *src, const char *dest_file_name,
  40               const short hide_error)
  41 {
  42         int err = 0;
  43
  44         char *src_basec = xstrdup(src);
  45         char *src_base = basename(src_basec);
  46         char *tmp_file_location;
  47
  48         opkg_msg(NOTICE, "Downloading %s\n", src);
  49
  50         if (str_starts_with(src, "file:")) {
  51                 char *file_src = urldecode_path(src + 5);
  52                 opkg_msg(INFO, "Copying %s to %s...", file_src, dest_file_name);
  53                 err = file_copy(file_src, dest_file_name);
  54                 opkg_msg(INFO, "Done.\n");
  55                 free(src_basec);
  56                 free(file_src);
  57                 return err;
  58         }
  59
  60         sprintf_alloc(&tmp_file_location, "%s/%s", conf->tmp_dir, src_base);
  61         free(src_basec);
  62         err = unlink(tmp_file_location);
  63         if (err && errno != ENOENT) {
  64                 opkg_perror(ERROR, "Failed to unlink %s", tmp_file_location);
  65                 free(tmp_file_location);
  66                 return -1;
  67         }
  68
  69         if (conf->http_proxy) {
  70                 opkg_msg(DEBUG,
  71                          "Setting environment variable: http_proxy = %s.\n",
  72                          conf->http_proxy);
  73                 setenv("http_proxy", conf->http_proxy, 1);
  74         }
  75         if (conf->ftp_proxy) {
  76                 opkg_msg(DEBUG,
  77                          "Setting environment variable: ftp_proxy = %s.\n",
  78                          conf->ftp_proxy);
  79                 setenv("ftp_proxy", conf->ftp_proxy, 1);
  80         }
  81         if (conf->no_proxy) {
  82                 opkg_msg(DEBUG,
  83                          "Setting environment variable: no_proxy = %s.\n",
  84                          conf->no_proxy);
  85                 setenv("no_proxy", conf->no_proxy, 1);
  86         }
  87
  88         {
  89                 int res;
  90                 const char *argv[11];
  91                 int i = 0;
  92
  93                 argv[i++] = "wget";
  94                 argv[i++] = "-q";
  95                 if (conf->no_check_certificate) {
  96                         argv[i++] = "--no-check-certificate";
  97                 }
  98                 if (conf->http_timeout) {
  99                         argv[i++] = "--timeout";
 100                         argv[i++] = conf->http_timeout;
 101                 }
 102                 if (conf->http_proxy || conf->ftp_proxy) {
 103                         argv[i++] = "-Y";
 104                         argv[i++] = "on";
 105                 }
 106                 argv[i++] = "-O";
 107                 argv[i++] = tmp_file_location;
 108                 argv[i++] = src;
 109                 argv[i++] = NULL;
 110                 res = xsystem(argv);
 111
 112                 if (res) {
 113                         opkg_msg(ERROR,
 114                                  "Failed to download %s, wget returned %d.\n",
 115                                  src, res);
 116                         if (res == 4)
 117                                 opkg_msg(ERROR,
 118                                          "Check your network settings and connectivity.\n\n");
 119                         free(tmp_file_location);
 120                         return -1;
 121                 }
 122         }
 123
 124         err = file_move(tmp_file_location, dest_file_name);
 125
 126         free(tmp_file_location);
 127
 128         return err;
 129 }
 130
 131 static int
 132 opkg_download_cache(const char *src, const char *dest_file_name)
 133 {
 134         char *cache_name, *cache_location;
 135         int err = 0;
 136
 137         if (!conf->cache || str_starts_with(src, "file:")) {
 138                 err = opkg_download(src, dest_file_name, 0);
 139                 goto out1;
 140         }
 141
 142         if (!file_is_dir(conf->cache)) {
 143                 opkg_msg(ERROR, "%s is not a directory.\n", conf->cache);
 144                 err = 1;
 145                 goto out1;
 146         }
 147
 148         char *filename = strrchr(dest_file_name, '/');
 149         if (filename)
 150                 cache_name = xstrdup(filename + 1);     // strip leading '/'
 151         else
 152                 cache_name = xstrdup(dest_file_name);
 153         sprintf_alloc(&cache_location, "%s/%s", conf->cache, cache_name);
 154         if (file_exists(cache_location))
 155                 opkg_msg(NOTICE, "Copying %s.\n", cache_location);
 156         else {
 157                 err = opkg_download(src, cache_location, 0);
 158                 if (err) {
 159                         (void)unlink(cache_location);
 160                         goto out2;
 161                 }
 162         }
 163
 164         err = file_copy(cache_location, dest_file_name);
 165
 166 out2:
 167         free(cache_location);
 168         free(cache_name);
 169 out1:
 170         return err;
 171 }
 172
 173 int opkg_download_pkg(pkg_t * pkg, const char *dir)
 174 {
 175         int err;
 176         char *url;
 177         char *local_filename;
 178         char *stripped_filename;
 179         char *urlencoded_path;
 180         char *filename;
 181
 182         if (pkg->src == NULL) {
 183                 opkg_msg(ERROR,
 184                          "Package %s is not available from any configured src.\n",
 185                          pkg->name);
 186                 return -1;
 187         }
 188
 189         filename = pkg_get_string(pkg, PKG_FILENAME);
 190
 191         if (filename == NULL) {
 192                 opkg_msg(ERROR,
 193                          "Package %s does not have a valid filename field.\n",
 194                          pkg->name);
 195                 return -1;
 196         }
 197
 198         urlencoded_path = urlencode_path(filename);
 199         sprintf_alloc(&url, "%s/%s", pkg->src->value, urlencoded_path);
 200         free(urlencoded_path);
 201
 202         /* The filename might be something like
 203            "../../foo.opk". While this is correct, and exactly what we
 204            want to use to construct url above, here we actually need to
 205            use just the filename part, without any directory. */
 206
 207         stripped_filename = strrchr(filename, '/');
 208         if (!stripped_filename)
 209                 stripped_filename = filename;
 210
 211         sprintf_alloc(&local_filename, "%s/%s", dir, stripped_filename);
 212         pkg_set_string(pkg, PKG_LOCAL_FILENAME, local_filename);
 213
 214         err = opkg_download_cache(url, local_filename);
 215         free(url);
 216
 217         return err;
 218 }
 219
 220 /*
 221  * Downloads file from url, installs in package database, return package name.
 222  */
 223 int opkg_prepare_url_for_install(const char *url, char **namep)
 224 {
 225         int err = 0;
 226         pkg_t *pkg;
 227         abstract_pkg_t *ab_pkg;
 228
 229         pkg = pkg_new();
 230
 231         if (str_starts_with(url, "http://")
 232             || str_starts_with(url, "ftp://")) {
 233                 char *tmp_file;
 234                 char *file_basec = xstrdup(url);
 235                 char *file_base = basename(file_basec);
 236
 237                 sprintf_alloc(&tmp_file, "%s/%s", conf->tmp_dir, file_base);
 238                 err = opkg_download(url, tmp_file, 0);
 239                 if (err)
 240                         return err;
 241
 242                 err = pkg_init_from_file(pkg, tmp_file);
 243                 if (err)
 244                         return err;
 245
 246                 free(tmp_file);
 247                 free(file_basec);
 248
 249         } else if (strcmp(&url[strlen(url) - 4], OPKG_PKG_EXTENSION) == 0
 250                    || strcmp(&url[strlen(url) - 4], IPKG_PKG_EXTENSION) == 0
 251                    || strcmp(&url[strlen(url) - 4], DPKG_PKG_EXTENSION) == 0) {
 252
 253                 err = pkg_init_from_file(pkg, url);
 254                 if (err)
 255                         return err;
 256                 opkg_msg(DEBUG2, "Package %s provided by hand (%s).\n",
 257                          pkg->name, pkg_get_string(pkg, PKG_LOCAL_FILENAME));
 258                 pkg->provided_by_hand = 1;
 259
 260         } else {
 261                 ab_pkg = ensure_abstract_pkg_by_name(url);
 262
 263                 if (!(ab_pkg->state_flag & SF_NEED_DETAIL)) {
 264                         opkg_msg(DEBUG, "applying abpkg flag to %s\n", ab_pkg->name);
 265                         ab_pkg->state_flag |= SF_NEED_DETAIL;
 266                 }
 267
 268                 pkg_deinit(pkg);
 269                 free(pkg);
 270                 return 0;
 271         }
 272
 273         pkg->dest = conf->default_dest;
 274         pkg->state_want = SW_INSTALL;
 275         pkg->state_flag |= SF_PREFER;
 276         hash_insert_pkg(pkg, 1);
 277
 278         if (namep) {
 279                 *namep = xstrdup(pkg->name);
 280         }
 281         return 0;
 282 }
 283
 284 int opkg_verify_file(char *text_file, char *sig_file)
 285 {
 286 #if defined HAVE_USIGN
 287         const char *argv[] = { conf->verify_program, "verify", sig_file,
 288                                text_file, NULL };
 289
 290         return xsystem(argv) ? -1 : 0;
 291 #else
 292         /* mute `unused variable' warnings. */
 293         (void)sig_file;
 294         (void)text_file;
 295         (void)conf;
 296         return 0;
 297 #endif
 298 }