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[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 = xstrdup(src);
 135         char *cache_location, *p;
 136         int err = 0;
 137
 138         if (!conf->cache || str_starts_with(src, "file:")) {
 139                 err = opkg_download(src, dest_file_name, 0);
 140                 goto out1;
 141         }
 142
 143         if (!file_is_dir(conf->cache)) {
 144                 opkg_msg(ERROR, "%s is not a directory.\n", conf->cache);
 145                 err = 1;
 146                 goto out1;
 147         }
 148
 149         for (p = cache_name; *p; p++)
 150                 if (*p == '/')
 151                         *p = ',';       /* looks nicer than | or # */
 152
 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                 /* cache file with funky name not found, try simple name */
 158                 free(cache_name);
 159                 char *filename = strrchr(dest_file_name, '/');
 160                 if (filename)
 161                         cache_name = xstrdup(filename + 1);     // strip leading '/'
 162                 else
 163                         cache_name = xstrdup(dest_file_name);
 164                 free(cache_location);
 165                 sprintf_alloc(&cache_location, "%s/%s", conf->cache,
 166                               cache_name);
 167                 if (file_exists(cache_location))
 168                         opkg_msg(NOTICE, "Copying %s.\n", cache_location);
 169                 else {
 170                         err = opkg_download(src, cache_location, 0);
 171                         if (err) {
 172                                 (void)unlink(cache_location);
 173                                 goto out2;
 174                         }
 175                 }
 176         }
 177
 178         err = file_copy(cache_location, dest_file_name);
 179
 180 out2:
 181         free(cache_location);
 182 out1:
 183         free(cache_name);
 184         return err;
 185 }
 186
 187 int opkg_download_pkg(pkg_t * pkg, const char *dir)
 188 {
 189         int err;
 190         char *url;
 191         char *local_filename;
 192         char *stripped_filename;
 193         char *urlencoded_path;
 194         char *filename;
 195
 196         if (pkg->src == NULL) {
 197                 opkg_msg(ERROR,
 198                          "Package %s is not available from any configured src.\n",
 199                          pkg->name);
 200                 return -1;
 201         }
 202
 203         filename = pkg_get_string(pkg, PKG_FILENAME);
 204
 205         if (filename == NULL) {
 206                 opkg_msg(ERROR,
 207                          "Package %s does not have a valid filename field.\n",
 208                          pkg->name);
 209                 return -1;
 210         }
 211
 212         urlencoded_path = urlencode_path(filename);
 213         sprintf_alloc(&url, "%s/%s", pkg->src->value, urlencoded_path);
 214         free(urlencoded_path);
 215
 216         /* The filename might be something like
 217            "../../foo.opk". While this is correct, and exactly what we
 218            want to use to construct url above, here we actually need to
 219            use just the filename part, without any directory. */
 220
 221         stripped_filename = strrchr(filename, '/');
 222         if (!stripped_filename)
 223                 stripped_filename = filename;
 224
 225         sprintf_alloc(&local_filename, "%s/%s", dir, stripped_filename);
 226         pkg_set_string(pkg, PKG_LOCAL_FILENAME, local_filename);
 227
 228         err = opkg_download_cache(url, local_filename);
 229         free(url);
 230
 231         return err;
 232 }
 233
 234 /*
 235  * Downloads file from url, installs in package database, return package name.
 236  */
 237 int opkg_prepare_url_for_install(const char *url, char **namep)
 238 {
 239         int err = 0;
 240         pkg_t *pkg;
 241         abstract_pkg_t *ab_pkg;
 242
 243         pkg = pkg_new();
 244
 245         if (str_starts_with(url, "http://")
 246             || str_starts_with(url, "ftp://")) {
 247                 char *tmp_file;
 248                 char *file_basec = xstrdup(url);
 249                 char *file_base = basename(file_basec);
 250
 251                 sprintf_alloc(&tmp_file, "%s/%s", conf->tmp_dir, file_base);
 252                 err = opkg_download(url, tmp_file, 0);
 253                 if (err)
 254                         return err;
 255
 256                 err = pkg_init_from_file(pkg, tmp_file);
 257                 if (err)
 258                         return err;
 259
 260                 free(tmp_file);
 261                 free(file_basec);
 262
 263         } else if (strcmp(&url[strlen(url) - 4], OPKG_PKG_EXTENSION) == 0
 264                    || strcmp(&url[strlen(url) - 4], IPKG_PKG_EXTENSION) == 0
 265                    || strcmp(&url[strlen(url) - 4], DPKG_PKG_EXTENSION) == 0) {
 266
 267                 err = pkg_init_from_file(pkg, url);
 268                 if (err)
 269                         return err;
 270                 opkg_msg(DEBUG2, "Package %s provided by hand (%s).\n",
 271                          pkg->name, pkg_get_string(pkg, PKG_LOCAL_FILENAME));
 272                 pkg->provided_by_hand = 1;
 273
 274         } else {
 275                 ab_pkg = ensure_abstract_pkg_by_name(url);
 276
 277                 if (!(ab_pkg->state_flag & SF_NEED_DETAIL)) {
 278                         opkg_msg(DEBUG, "applying abpkg flag to %s\n", ab_pkg->name);
 279                         ab_pkg->state_flag |= SF_NEED_DETAIL;
 280                 }
 281
 282                 pkg_deinit(pkg);
 283                 free(pkg);
 284                 return 0;
 285         }
 286
 287         pkg->dest = conf->default_dest;
 288         pkg->state_want = SW_INSTALL;
 289         pkg->state_flag |= SF_PREFER;
 290         hash_insert_pkg(pkg, 1);
 291
 292         if (namep) {
 293                 *namep = xstrdup(pkg->name);
 294         }
 295         return 0;
 296 }
 297
 298 int opkg_verify_file(char *text_file, char *sig_file)
 299 {
 300 #if defined HAVE_USIGN
 301         int status = -1;
 302         int pid;
 303
 304         if (conf->check_signature == 0)
 305                 return 0;
 306
 307         pid = fork();
 308         if (pid < 0)
 309                 return -1;
 310
 311         if (!pid) {
 312                 execl("/usr/sbin/opkg-key", "opkg-key", "verify", sig_file,
 313                       text_file, NULL);
 314                 exit(255);
 315         }
 316
 317         waitpid(pid, &status, 0);
 318         if (!WIFEXITED(status) || WEXITSTATUS(status))
 319                 return -1;
 320
 321         return 0;
 322 #else
 323         /* mute `unused variable' warnings. */
 324         (void)sig_file;
 325         (void)text_file;
 326         (void)conf;
 327         return 0;
 328 #endif
 329 }