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                 char *file_src = urldecode_path(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                 free(file_src);
  58                 return err;
  59         }
  60
  61         sprintf_alloc(&tmp_file_location, "%s/%s", conf->tmp_dir, src_base);
  62         free(src_basec);
  63         err = unlink(tmp_file_location);
  64         if (err && errno != ENOENT) {
  65                 opkg_perror(ERROR, "Failed to unlink %s", tmp_file_location);
  66                 free(tmp_file_location);
  67                 return -1;
  68         }
  69
  70         if (conf->http_proxy) {
  71                 opkg_msg(DEBUG,
  72                          "Setting environment variable: http_proxy = %s.\n",
  73                          conf->http_proxy);
  74                 setenv("http_proxy", conf->http_proxy, 1);
  75         }
  76         if (conf->ftp_proxy) {
  77                 opkg_msg(DEBUG,
  78                          "Setting environment variable: ftp_proxy = %s.\n",
  79                          conf->ftp_proxy);
  80                 setenv("ftp_proxy", conf->ftp_proxy, 1);
  81         }
  82         if (conf->no_proxy) {
  83                 opkg_msg(DEBUG,
  84                          "Setting environment variable: no_proxy = %s.\n",
  85                          conf->no_proxy);
  86                 setenv("no_proxy", conf->no_proxy, 1);
  87         }
  88
  89         {
  90                 int res;
  91                 const char *argv[9];
  92                 int i = 0;
  93
  94                 argv[i++] = "wget";
  95                 argv[i++] = "-q";
  96                 if (conf->no_check_certificate) {
  97                         argv[i++] = "--no-check-certificate";
  98                 }
  99                 if (conf->http_proxy || conf->ftp_proxy) {
 100                         argv[i++] = "-Y";
 101                         argv[i++] = "on";
 102                 }
 103                 argv[i++] = "-O";
 104                 argv[i++] = tmp_file_location;
 105                 argv[i++] = src;
 106                 argv[i++] = NULL;
 107                 res = xsystem(argv);
 108
 109                 if (res) {
 110                         opkg_msg(ERROR,
 111                                  "Failed to download %s, wget returned %d.\n",
 112                                  src, res);
 113                         if (res == 4)
 114                                 opkg_msg(ERROR,
 115                                          "Check your network settings and connectivity.\n\n");
 116                         free(tmp_file_location);
 117                         return -1;
 118                 }
 119         }
 120
 121         err = file_move(tmp_file_location, dest_file_name);
 122
 123         free(tmp_file_location);
 124
 125         return err;
 126 }
 127
 128 static int
 129 opkg_download_cache(const char *src, const char *dest_file_name)
 130 {
 131         char *cache_name = xstrdup(src);
 132         char *cache_location, *p;
 133         int err = 0;
 134
 135         if (!conf->cache || str_starts_with(src, "file:")) {
 136                 err = opkg_download(src, dest_file_name, 0);
 137                 goto out1;
 138         }
 139
 140         if (!file_is_dir(conf->cache)) {
 141                 opkg_msg(ERROR, "%s is not a directory.\n", conf->cache);
 142                 err = 1;
 143                 goto out1;
 144         }
 145
 146         for (p = cache_name; *p; p++)
 147                 if (*p == '/')
 148                         *p = ',';       /* looks nicer than | or # */
 149
 150         sprintf_alloc(&cache_location, "%s/%s", conf->cache, cache_name);
 151         if (file_exists(cache_location))
 152                 opkg_msg(NOTICE, "Copying %s.\n", cache_location);
 153         else {
 154                 /* cache file with funky name not found, try simple name */
 155                 free(cache_name);
 156                 char *filename = strrchr(dest_file_name, '/');
 157                 if (filename)
 158                         cache_name = xstrdup(filename + 1);     // strip leading '/'
 159                 else
 160                         cache_name = xstrdup(dest_file_name);
 161                 free(cache_location);
 162                 sprintf_alloc(&cache_location, "%s/%s", conf->cache,
 163                               cache_name);
 164                 if (file_exists(cache_location))
 165                         opkg_msg(NOTICE, "Copying %s.\n", cache_location);
 166                 else {
 167                         err = opkg_download(src, cache_location, 0);
 168                         if (err) {
 169                                 (void)unlink(cache_location);
 170                                 goto out2;
 171                         }
 172                 }
 173         }
 174
 175         err = file_copy(cache_location, dest_file_name);
 176
 177 out2:
 178         free(cache_location);
 179 out1:
 180         free(cache_name);
 181         return err;
 182 }
 183
 184 int opkg_download_pkg(pkg_t * pkg, const char *dir)
 185 {
 186         int err;
 187         char *url;
 188         char *local_filename;
 189         char *stripped_filename;
 190         char *urlencoded_path;
 191         char *filename;
 192
 193         if (pkg->src == NULL) {
 194                 opkg_msg(ERROR,
 195                          "Package %s is not available from any configured src.\n",
 196                          pkg->name);
 197                 return -1;
 198         }
 199
 200         filename = pkg_get_string(pkg, PKG_FILENAME);
 201
 202         if (filename == NULL) {
 203                 opkg_msg(ERROR,
 204                          "Package %s does not have a valid filename field.\n",
 205                          pkg->name);
 206                 return -1;
 207         }
 208
 209         urlencoded_path = urlencode_path(filename);
 210         sprintf_alloc(&url, "%s/%s", pkg->src->value, urlencoded_path);
 211         free(urlencoded_path);
 212
 213         /* The filename might be something like
 214            "../../foo.opk". While this is correct, and exactly what we
 215            want to use to construct url above, here we actually need to
 216            use just the filename part, without any directory. */
 217
 218         stripped_filename = strrchr(filename, '/');
 219         if (!stripped_filename)
 220                 stripped_filename = filename;
 221
 222         sprintf_alloc(&local_filename, "%s/%s", dir, stripped_filename);
 223         pkg_set_string(pkg, PKG_LOCAL_FILENAME, local_filename);
 224
 225         err = opkg_download_cache(url, local_filename);
 226         free(url);
 227
 228         return err;
 229 }
 230
 231 /*
 232  * Downloads file from url, installs in package database, return package name.
 233  */
 234 int opkg_prepare_url_for_install(const char *url, char **namep)
 235 {
 236         int err = 0;
 237         pkg_t *pkg;
 238         abstract_pkg_t *ab_pkg;
 239
 240         pkg = pkg_new();
 241
 242         if (str_starts_with(url, "http://")
 243             || str_starts_with(url, "ftp://")) {
 244                 char *tmp_file;
 245                 char *file_basec = xstrdup(url);
 246                 char *file_base = basename(file_basec);
 247
 248                 sprintf_alloc(&tmp_file, "%s/%s", conf->tmp_dir, file_base);
 249                 err = opkg_download(url, tmp_file, 0);
 250                 if (err)
 251                         return err;
 252
 253                 err = pkg_init_from_file(pkg, tmp_file);
 254                 if (err)
 255                         return err;
 256
 257                 free(tmp_file);
 258                 free(file_basec);
 259
 260         } else if (strcmp(&url[strlen(url) - 4], OPKG_PKG_EXTENSION) == 0
 261                    || strcmp(&url[strlen(url) - 4], IPKG_PKG_EXTENSION) == 0
 262                    || strcmp(&url[strlen(url) - 4], DPKG_PKG_EXTENSION) == 0) {
 263
 264                 err = pkg_init_from_file(pkg, url);
 265                 if (err)
 266                         return err;
 267                 opkg_msg(DEBUG2, "Package %s provided by hand (%s).\n",
 268                          pkg->name, pkg_get_string(pkg, PKG_LOCAL_FILENAME));
 269                 pkg->provided_by_hand = 1;
 270
 271         } else {
 272                 ab_pkg = ensure_abstract_pkg_by_name(url);
 273
 274                 if (!(ab_pkg->state_flag & SF_NEED_DETAIL)) {
 275                         opkg_msg(DEBUG, "applying abpkg flag to %s\n", ab_pkg->name);
 276                         ab_pkg->state_flag |= SF_NEED_DETAIL;
 277                 }
 278
 279                 pkg_deinit(pkg);
 280                 free(pkg);
 281                 return 0;
 282         }
 283
 284         pkg->dest = conf->default_dest;
 285         pkg->state_want = SW_INSTALL;
 286         pkg->state_flag |= SF_PREFER;
 287         hash_insert_pkg(pkg, 1);
 288
 289         if (namep) {
 290                 *namep = xstrdup(pkg->name);
 291         }
 292         return 0;
 293 }
 294
 295 int opkg_verify_file(char *text_file, char *sig_file)
 296 {
 297 #if defined HAVE_USIGN
 298         int status = -1;
 299         int pid;
 300
 301         if (conf->check_signature == 0)
 302                 return 0;
 303
 304         pid = fork();
 305         if (pid < 0)
 306                 return -1;
 307
 308         if (!pid) {
 309                 execl("/usr/sbin/opkg-key", "opkg-key", "verify", sig_file,
 310                       text_file, NULL);
 311                 exit(255);
 312         }
 313
 314         waitpid(pid, &status, 0);
 315         if (!WIFEXITED(status) || WEXITSTATUS(status))
 316                 return -1;
 317
 318         return 0;
 319 #else
 320         /* mute `unused variable' warnings. */
 321         (void)sig_file;
 322         (void)text_file;
 323         (void)conf;
 324         return 0;
 325 #endif
 326 }