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[8];
  91                 int i = 0;
  92
  93                 argv[i++] = "wget";
  94                 argv[i++] = "-q";
  95                 if (conf->http_proxy || conf->ftp_proxy) {
  96                         argv[i++] = "-Y";
  97                         argv[i++] = "on";
  98                 }
  99                 argv[i++] = "-O";
 100                 argv[i++] = tmp_file_location;
 101                 argv[i++] = src;
 102                 argv[i++] = NULL;
 103                 res = xsystem(argv);
 104
 105                 if (res) {
 106                         opkg_msg(ERROR,
 107                                  "Failed to download %s, wget returned %d.\n",
 108                                  src, res);
 109                         if (res == 4)
 110                                 opkg_msg(ERROR,
 111                                          "Check your network settings and connectivity.\n\n");
 112                         free(tmp_file_location);
 113                         return -1;
 114                 }
 115         }
 116
 117         err = file_move(tmp_file_location, dest_file_name);
 118
 119         free(tmp_file_location);
 120
 121         return err;
 122 }
 123
 124 static int
 125 opkg_download_cache(const char *src, const char *dest_file_name)
 126 {
 127         char *cache_name = xstrdup(src);
 128         char *cache_location, *p;
 129         int err = 0;
 130
 131         if (!conf->cache || str_starts_with(src, "file:")) {
 132                 err = opkg_download(src, dest_file_name, 0);
 133                 goto out1;
 134         }
 135
 136         if (!file_is_dir(conf->cache)) {
 137                 opkg_msg(ERROR, "%s is not a directory.\n", conf->cache);
 138                 err = 1;
 139                 goto out1;
 140         }
 141
 142         for (p = cache_name; *p; p++)
 143                 if (*p == '/')
 144                         *p = ',';       /* looks nicer than | or # */
 145
 146         sprintf_alloc(&cache_location, "%s/%s", conf->cache, cache_name);
 147         if (file_exists(cache_location))
 148                 opkg_msg(NOTICE, "Copying %s.\n", cache_location);
 149         else {
 150                 /* cache file with funky name not found, try simple name */
 151                 free(cache_name);
 152                 char *filename = strrchr(dest_file_name, '/');
 153                 if (filename)
 154                         cache_name = xstrdup(filename + 1);     // strip leading '/'
 155                 else
 156                         cache_name = xstrdup(dest_file_name);
 157                 free(cache_location);
 158                 sprintf_alloc(&cache_location, "%s/%s", conf->cache,
 159                               cache_name);
 160                 if (file_exists(cache_location))
 161                         opkg_msg(NOTICE, "Copying %s.\n", cache_location);
 162                 else {
 163                         err = opkg_download(src, cache_location, 0);
 164                         if (err) {
 165                                 (void)unlink(cache_location);
 166                                 goto out2;
 167                         }
 168                 }
 169         }
 170
 171         err = file_copy(cache_location, dest_file_name);
 172
 173 out2:
 174         free(cache_location);
 175 out1:
 176         free(cache_name);
 177         return err;
 178 }
 179
 180 int opkg_download_pkg(pkg_t * pkg, const char *dir)
 181 {
 182         int err;
 183         char *url;
 184         char *local_filename;
 185         char *stripped_filename;
 186         char *filename;
 187
 188         if (pkg->src == NULL) {
 189                 opkg_msg(ERROR,
 190                          "Package %s is not available from any configured src.\n",
 191                          pkg->name);
 192                 return -1;
 193         }
 194
 195         filename = pkg_get_string(pkg, PKG_FILENAME);
 196
 197         if (filename == NULL) {
 198                 opkg_msg(ERROR,
 199                          "Package %s does not have a valid filename field.\n",
 200                          pkg->name);
 201                 return -1;
 202         }
 203
 204         sprintf_alloc(&url, "%s/%s", pkg->src->value, filename);
 205
 206         /* The filename might be something like
 207            "../../foo.opk". While this is correct, and exactly what we
 208            want to use to construct url above, here we actually need to
 209            use just the filename part, without any directory. */
 210
 211         stripped_filename = strrchr(filename, '/');
 212         if (!stripped_filename)
 213                 stripped_filename = filename;
 214
 215         sprintf_alloc(&local_filename, "%s/%s", dir, stripped_filename);
 216         pkg_set_string(pkg, PKG_LOCAL_FILENAME, local_filename);
 217
 218         err = opkg_download_cache(url, local_filename);
 219         free(url);
 220
 221         return err;
 222 }
 223
 224 /*
 225  * Downloads file from url, installs in package database, return package name.
 226  */
 227 int opkg_prepare_url_for_install(const char *url, char **namep)
 228 {
 229         int err = 0;
 230         pkg_t *pkg;
 231         abstract_pkg_t *ab_pkg;
 232
 233         pkg = pkg_new();
 234
 235         if (str_starts_with(url, "http://")
 236             || str_starts_with(url, "ftp://")) {
 237                 char *tmp_file;
 238                 char *file_basec = xstrdup(url);
 239                 char *file_base = basename(file_basec);
 240
 241                 sprintf_alloc(&tmp_file, "%s/%s", conf->tmp_dir, file_base);
 242                 err = opkg_download(url, tmp_file, 0);
 243                 if (err)
 244                         return err;
 245
 246                 err = pkg_init_from_file(pkg, tmp_file);
 247                 if (err)
 248                         return err;
 249
 250                 free(tmp_file);
 251                 free(file_basec);
 252
 253         } else if (strcmp(&url[strlen(url) - 4], OPKG_PKG_EXTENSION) == 0
 254                    || strcmp(&url[strlen(url) - 4], IPKG_PKG_EXTENSION) == 0
 255                    || strcmp(&url[strlen(url) - 4], DPKG_PKG_EXTENSION) == 0) {
 256
 257                 err = pkg_init_from_file(pkg, url);
 258                 if (err)
 259                         return err;
 260                 opkg_msg(DEBUG2, "Package %s provided by hand (%s).\n",
 261                          pkg->name, pkg_get_string(pkg, PKG_LOCAL_FILENAME));
 262                 pkg->provided_by_hand = 1;
 263
 264         } else {
 265                 ab_pkg = ensure_abstract_pkg_by_name(url);
 266
 267                 if (!(ab_pkg->state_flag & SF_NEED_DETAIL)) {
 268                         opkg_msg(DEBUG, "applying abpkg flag to %s\n", ab_pkg->name);
 269                         ab_pkg->state_flag |= SF_NEED_DETAIL;
 270                 }
 271
 272                 pkg_deinit(pkg);
 273                 free(pkg);
 274                 return 0;
 275         }
 276
 277         pkg->dest = conf->default_dest;
 278         pkg->state_want = SW_INSTALL;
 279         pkg->state_flag |= SF_PREFER;
 280         hash_insert_pkg(pkg, 1);
 281
 282         if (namep) {
 283                 *namep = xstrdup(pkg->name);
 284         }
 285         return 0;
 286 }
 287
 288 int opkg_verify_file(char *text_file, char *sig_file)
 289 {
 290 #if defined HAVE_USIGN
 291         int status = -1;
 292         int pid;
 293
 294         if (conf->check_signature == 0)
 295                 return 0;
 296
 297         pid = fork();
 298         if (pid < 0)
 299                 return -1;
 300
 301         if (!pid) {
 302                 execl("/usr/sbin/opkg-key", "opkg-key", "verify", sig_file,
 303                       text_file, NULL);
 304                 exit(255);
 305         }
 306
 307         waitpid(pid, &status, 0);
 308         if (!WIFEXITED(status) || WEXITSTATUS(status))
 309                 return -1;
 310
 311         return 0;
 312 #else
 313         /* mute `unused variable' warnings. */
 314         (void)sig_file;
 315         (void)text_file;
 316         (void)conf;
 317         return 0;
 318 #endif
 319 }