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 <sys/wait.h>
  21 #include <stdio.h>
  22 #include <unistd.h>
  23 #include <libgen.h>
  24
  25 #include "opkg_download.h"
  26 #include "opkg_message.h"
  27
  28 #include "sprintf_alloc.h"
  29 #include "xsystem.h"
  30 #include "file_util.h"
  31 #include "opkg_defines.h"
  32 #include "libbb/libbb.h"
  33
  34 static int str_starts_with(const char *str, const char *prefix)
  35 {
  36         return (strncmp(str, prefix, strlen(prefix)) == 0);
  37 }
  38
  39 int
  40 opkg_download(const char *src, const char *dest_file_name,
  41               const short hide_error)
  42 {
  43         int err = 0;
  44
  45         char *src_basec = xstrdup(src);
  46         char *src_base = basename(src_basec);
  47         char *tmp_file_location;
  48
  49         opkg_msg(NOTICE, "Downloading %s\n", src);
  50
  51         if (str_starts_with(src, "file:")) {
  52                 const char *file_src = src + 5;
  53                 opkg_msg(INFO, "Copying %s to %s...", file_src, dest_file_name);
  54                 err = file_copy(file_src, dest_file_name);
  55                 opkg_msg(INFO, "Done.\n");
  56                 free(src_basec);
  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[9];
  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_proxy || conf->ftp_proxy) {
  99                         argv[i++] = "-Y";
 100                         argv[i++] = "on";
 101                 }
 102                 argv[i++] = "-O";
 103                 argv[i++] = tmp_file_location;
 104                 argv[i++] = src;
 105                 argv[i++] = NULL;
 106                 res = xsystem(argv);
 107
 108                 if (res) {
 109                         opkg_msg(ERROR,
 110                                  "Failed to download %s, wget returned %d.\n",
 111                                  src, res);
 112                         if (res == 4)
 113                                 opkg_msg(ERROR,
 114                                          "Check your network settings and connectivity.\n\n");
 115                         free(tmp_file_location);
 116                         return -1;
 117                 }
 118         }
 119
 120         err = file_move(tmp_file_location, dest_file_name);
 121
 122         free(tmp_file_location);
 123
 124         return err;
 125 }
 126
 127 static int
 128 opkg_download_cache(const char *src, const char *dest_file_name)
 129 {
 130         char *cache_name = xstrdup(src);
 131         char *cache_location, *p;
 132         int err = 0;
 133
 134         if (!conf->cache || str_starts_with(src, "file:")) {
 135                 err = opkg_download(src, dest_file_name, 0);
 136                 goto out1;
 137         }
 138
 139         if (!file_is_dir(conf->cache)) {
 140                 opkg_msg(ERROR, "%s is not a directory.\n", conf->cache);
 141                 err = 1;
 142                 goto out1;
 143         }
 144
 145         for (p = cache_name; *p; p++)
 146                 if (*p == '/')
 147                         *p = ',';       /* looks nicer than | or # */
 148
 149         sprintf_alloc(&cache_location, "%s/%s", conf->cache, cache_name);
 150         if (file_exists(cache_location))
 151                 opkg_msg(NOTICE, "Copying %s.\n", cache_location);
 152         else {
 153                 /* cache file with funky name not found, try simple name */
 154                 free(cache_name);
 155                 char *filename = strrchr(dest_file_name, '/');
 156                 if (filename)
 157                         cache_name = xstrdup(filename + 1);     // strip leading '/'
 158                 else
 159                         cache_name = xstrdup(dest_file_name);
 160                 free(cache_location);
 161                 sprintf_alloc(&cache_location, "%s/%s", conf->cache,
 162                               cache_name);
 163                 if (file_exists(cache_location))
 164                         opkg_msg(NOTICE, "Copying %s.\n", cache_location);
 165                 else {
 166                         err = opkg_download(src, cache_location, 0);
 167                         if (err) {
 168                                 (void)unlink(cache_location);
 169                                 goto out2;
 170                         }
 171                 }
 172         }
 173
 174         err = file_copy(cache_location, dest_file_name);
 175
 176 out2:
 177         free(cache_location);
 178 out1:
 179         free(cache_name);
 180         return err;
 181 }
 182
 183 int opkg_download_pkg(pkg_t * pkg, const char *dir)
 184 {
 185         int err;
 186         char *url;
 187         char *local_filename;
 188         char *stripped_filename;
 189         char *urlencoded_path;
 190         char *filename;
 191
 192         if (pkg->src == NULL) {
 193                 opkg_msg(ERROR,
 194                          "Package %s is not available from any configured src.\n",
 195                          pkg->name);
 196                 return -1;
 197         }
 198
 199         filename = pkg_get_string(pkg, PKG_FILENAME);
 200
 201         if (filename == NULL) {
 202                 opkg_msg(ERROR,
 203                          "Package %s does not have a valid filename field.\n",
 204                          pkg->name);
 205                 return -1;
 206         }
 207
 208         urlencoded_path = urlencode_path(filename);
 209         sprintf_alloc(&url, "%s/%s", pkg->src->value, urlencoded_path);
 210         free(urlencoded_path);
 211
 212         /* The filename might be something like
 213            "../../foo.opk". While this is correct, and exactly what we
 214            want to use to construct url above, here we actually need to
 215            use just the filename part, without any directory. */
 216
 217         stripped_filename = strrchr(filename, '/');
 218         if (!stripped_filename)
 219                 stripped_filename = filename;
 220
 221         sprintf_alloc(&local_filename, "%s/%s", dir, stripped_filename);
 222         pkg_set_string(pkg, PKG_LOCAL_FILENAME, local_filename);
 223
 224         err = opkg_download_cache(url, local_filename);
 225         free(url);
 226
 227         return err;
 228 }
 229
 230 /*
 231  * Downloads file from url, installs in package database, return package name.
 232  */
 233 int opkg_prepare_url_for_install(const char *url, char **namep)
 234 {
 235         int err = 0;
 236         pkg_t *pkg;
 237         abstract_pkg_t *ab_pkg;
 238
 239         pkg = pkg_new();
 240
 241         if (str_starts_with(url, "http://")
 242             || str_starts_with(url, "ftp://")) {
 243                 char *tmp_file;
 244                 char *file_basec = xstrdup(url);
 245                 char *file_base = basename(file_basec);
 246
 247                 sprintf_alloc(&tmp_file, "%s/%s", conf->tmp_dir, file_base);
 248                 err = opkg_download(url, tmp_file, 0);
 249                 if (err)
 250                         return err;
 251
 252                 err = pkg_init_from_file(pkg, tmp_file);
 253                 if (err)
 254                         return err;
 255
 256                 free(tmp_file);
 257                 free(file_basec);
 258
 259         } else if (strcmp(&url[strlen(url) - 4], OPKG_PKG_EXTENSION) == 0
 260                    || strcmp(&url[strlen(url) - 4], IPKG_PKG_EXTENSION) == 0
 261                    || strcmp(&url[strlen(url) - 4], DPKG_PKG_EXTENSION) == 0) {
 262
 263                 err = pkg_init_from_file(pkg, url);
 264                 if (err)
 265                         return err;
 266                 opkg_msg(DEBUG2, "Package %s provided by hand (%s).\n",
 267                          pkg->name, pkg_get_string(pkg, PKG_LOCAL_FILENAME));
 268                 pkg->provided_by_hand = 1;
 269
 270         } else {
 271                 ab_pkg = ensure_abstract_pkg_by_name(url);
 272
 273                 if (!(ab_pkg->state_flag & SF_NEED_DETAIL)) {
 274                         opkg_msg(DEBUG, "applying abpkg flag to %s\n", ab_pkg->name);
 275                         ab_pkg->state_flag |= SF_NEED_DETAIL;
 276                 }
 277
 278                 pkg_deinit(pkg);
 279                 free(pkg);
 280                 return 0;
 281         }
 282
 283         pkg->dest = conf->default_dest;
 284         pkg->state_want = SW_INSTALL;
 285         pkg->state_flag |= SF_PREFER;
 286         hash_insert_pkg(pkg, 1);
 287
 288         if (namep) {
 289                 *namep = xstrdup(pkg->name);
 290         }
 291         return 0;
 292 }
 293
 294 int opkg_verify_file(char *text_file, char *sig_file)
 295 {
 296 #if defined HAVE_USIGN
 297         int status = -1;
 298         int pid;
 299
 300         if (conf->check_signature == 0)
 301                 return 0;
 302
 303         pid = fork();
 304         if (pid < 0)
 305                 return -1;
 306
 307         if (!pid) {
 308                 execl("/usr/sbin/opkg-key", "opkg-key", "verify", sig_file,
 309                       text_file, NULL);
 310                 exit(255);
 311         }
 312
 313         waitpid(pid, &status, 0);
 314         if (!WIFEXITED(status) || WEXITSTATUS(status))
 315                 return -1;
 316
 317         return 0;
 318 #else
 319         /* mute `unused variable' warnings. */
 320         (void)sig_file;
 321         (void)text_file;
 322         (void)conf;
 323         return 0;
 324 #endif
 325 }