libopkg/opkg_download.c

   1 /* vi: set noexpandtab sw=4 sts=4: */
   2 /* opkg_download.c - the itsy 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 #include "config.h"
  20 #include <curl/curl.h>
  21 #ifdef HAVE_GPGME
  22 #include <gpgme.h>
  23 #endif
  24
  25 #include "includes.h"
  26 #include "opkg_download.h"
  27 #include "opkg_message.h"
  28 #include "opkg_state.h"
  29
  30 #include "sprintf_alloc.h"
  31 #include "xsystem.h"
  32 #include "file_util.h"
  33 #include "str_util.h"
  34 #include "opkg_defines.h"
  35
  36 opkg_download_progress_callback opkg_cb_download_progress = NULL;
  37
  38 int
  39 curl_progress_func (char* url,
  40                     double t, /* dltotal */
  41                     double d, /* dlnow */
  42                     double ultotal,
  43                     double ulnow)
  44 {
  45     int i;
  46     int p = (t) ? d*100/t : 0;
  47
  48     if (opkg_cb_download_progress)
  49     {
  50         static int prev = -1;
  51
  52         /* don't report the same percentage multiple times
  53          * (this can occur due to rounding) */
  54         if (prev == p)
  55             return 0;
  56         prev = p;
  57
  58         opkg_cb_download_progress (p, url);
  59         return 0;
  60     }
  61
  62     /* skip progress bar if we haven't done started yet
  63      * this prevents drawing the progress bar if we receive an error such as
  64      * file not found */
  65     if (t == 0)
  66         return 0;
  67
  68     printf ("\r%3d%% |", p);
  69     for (i = 1; i < 73; i++)
  70     {
  71         if (i <= p * 0.73)
  72             printf ("=");
  73         else
  74             printf ("-");
  75     }
  76     printf ("|");
  77     fflush(stdout);
  78     return 0;
  79 }
  80
  81 int opkg_download(opkg_conf_t *conf, const char *src, const char *dest_file_name)
  82 {
  83     int err = 0;
  84
  85     char *src_basec = strdup(src);
  86     char *src_base = basename(src_basec);
  87     char *tmp_file_location;
  88
  89     opkg_message(conf,OPKG_NOTICE,"Downloading %s\n", src);
  90
  91     fflush(stdout);
  92
  93     if (str_starts_with(src, "file:")) {
  94         int ret;
  95         const char *file_src = src + 5;
  96         opkg_message(conf,OPKG_INFO,"Copying %s to %s...", file_src, dest_file_name);
  97         ret = file_copy(src + 5, dest_file_name);
  98         opkg_message(conf,OPKG_INFO,"Done\n");
  99         return ret;
 100     }
 101
 102     sprintf_alloc(&tmp_file_location, "%s/%s", conf->tmp_dir, src_base);
 103     err = unlink(tmp_file_location);
 104     if (err && errno != ENOENT) {
 105         opkg_message(conf,OPKG_ERROR, "%s: ERROR: failed to unlink %s: %s\n",
 106                 __FUNCTION__, tmp_file_location, strerror(errno));
 107         free(tmp_file_location);
 108         return errno;
 109     }
 110
 111     if (conf->http_proxy) {
 112         opkg_message(conf,OPKG_DEBUG,"Setting environment variable: http_proxy = %s\n", conf->http_proxy);
 113         setenv("http_proxy", conf->http_proxy, 1);
 114     }
 115     if (conf->ftp_proxy) {
 116         opkg_message(conf,OPKG_DEBUG,"Setting environment variable: ftp_proxy = %s\n", conf->ftp_proxy);
 117         setenv("ftp_proxy", conf->ftp_proxy, 1);
 118     }
 119     if (conf->no_proxy) {
 120         opkg_message(conf,OPKG_DEBUG,"Setting environment variable: no_proxy = %s\n", conf->no_proxy);
 121         setenv("no_proxy", conf->no_proxy, 1);
 122     }
 123
 124     CURL *curl;
 125     CURLcode res;
 126     FILE * file = fopen (tmp_file_location, "w");
 127
 128     curl = curl_easy_init ();
 129     if (curl)
 130     {
 131         curl_easy_setopt (curl, CURLOPT_URL, src);
 132         curl_easy_setopt (curl, CURLOPT_WRITEDATA, file);
 133         curl_easy_setopt (curl, CURLOPT_NOPROGRESS, 0);
 134         curl_easy_setopt (curl, CURLOPT_PROGRESSDATA, src);
 135         curl_easy_setopt (curl, CURLOPT_PROGRESSFUNCTION, curl_progress_func);
 136         curl_easy_setopt (curl, CURLOPT_FAILONERROR, 1);
 137         if (conf->http_proxy || conf->ftp_proxy)
 138         {
 139             char *userpwd;
 140             sprintf_alloc (&userpwd, "%s:%s", conf->proxy_user,
 141                     conf->proxy_passwd);
 142             curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, userpwd);
 143             free (userpwd);
 144         }
 145         res = curl_easy_perform (curl);
 146         curl_easy_cleanup (curl);
 147         fclose (file);
 148         if (res)
 149         {
 150             long error_code;
 151             curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &error_code);
 152             opkg_message(conf, OPKG_ERROR, "Failed to download %s, error %d\n", src, error_code);
 153             return res;
 154         }
 155
 156     }
 157     else
 158         return -1;
 159
 160     /* if no custom progress handler was set, we need to clear the default progress bar */
 161     if (!opkg_cb_download_progress)
 162         printf ("\n");
 163
 164     err = file_move(tmp_file_location, dest_file_name);
 165
 166     free(tmp_file_location);
 167     free(src_basec);
 168
 169     if (err) {
 170         return err;
 171     }
 172
 173     return 0;
 174 }
 175
 176 int opkg_download_pkg(opkg_conf_t *conf, pkg_t *pkg, const char *dir)
 177 {
 178     int err;
 179     char *url;
 180     char *pkgid;
 181     char *stripped_filename;
 182
 183     if (pkg->src == NULL) {
 184         opkg_message(conf,OPKG_ERROR, "ERROR: Package %s (parent %s) is not available from any configured src.\n",
 185                 pkg->name, pkg->parent->name);
 186         return -1;
 187     }
 188
 189     sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 190     opkg_set_current_state (conf, OPKG_STATE_DOWNLOADING_PKG, pkgid);
 191     free (pkgid);
 192
 193     sprintf_alloc(&url, "%s/%s", pkg->src->value, pkg->filename);
 194
 195     /* XXX: BUG: The pkg->filename might be something like
 196        "../../foo.ipk". While this is correct, and exactly what we
 197        want to use to construct url above, here we actually need to
 198        use just the filename part, without any directory. */
 199
 200     stripped_filename = strrchr(pkg->filename, '/');
 201     if ( ! stripped_filename )
 202         stripped_filename = pkg->filename;
 203
 204     sprintf_alloc(&pkg->local_filename, "%s/%s", dir, stripped_filename);
 205
 206     err = opkg_download(conf, url, pkg->local_filename);
 207     free(url);
 208
 209     opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
 210     return err;
 211 }
 212
 213 /*
 214  * Downloads file from url, installs in package database, return package name.
 215  */
 216 int opkg_prepare_url_for_install(opkg_conf_t *conf, const char *url, char **namep)
 217 {
 218      int err = 0;
 219      pkg_t *pkg;
 220      pkg = pkg_new();
 221      if (pkg == NULL)
 222           return ENOMEM;
 223
 224      if (str_starts_with(url, "http://")
 225          || str_starts_with(url, "ftp://")) {
 226           char *tmp_file;
 227           char *file_basec = strdup(url);
 228           char *file_base = basename(file_basec);
 229
 230           sprintf_alloc(&tmp_file, "%s/%s", conf->tmp_dir, file_base);
 231           err = opkg_download(conf, url, tmp_file);
 232           if (err)
 233                return err;
 234
 235           err = pkg_init_from_file(pkg, tmp_file);
 236           if (err)
 237                return err;
 238           pkg->local_filename = strdup(tmp_file);
 239
 240           free(tmp_file);
 241           free(file_basec);
 242
 243      } else if (strcmp(&url[strlen(url) - 4], OPKG_PKG_EXTENSION) == 0
 244                 || strcmp(&url[strlen(url) - 4], DPKG_PKG_EXTENSION) == 0) {
 245
 246           err = pkg_init_from_file(pkg, url);
 247           if (err)
 248                return err;
 249           pkg->local_filename = strdup(url);
 250           opkg_message(conf, OPKG_DEBUG2, "Package %s provided by hand (%s).\n", pkg->name,pkg->local_filename);
 251           pkg->provided_by_hand = 1;
 252
 253      } else {
 254        pkg_deinit(pkg);
 255        free(pkg);
 256        return 0;
 257      }
 258
 259      if (!pkg->architecture) {
 260           opkg_message(conf, OPKG_ERROR, "Package %s has no Architecture defined.\n", pkg->name);
 261           return -EINVAL;
 262      }
 263
 264      pkg->dest = conf->default_dest;
 265      pkg->state_want = SW_INSTALL;
 266      pkg->state_flag |= SF_PREFER;
 267      pkg = hash_insert_pkg(&conf->pkg_hash, pkg, 1,conf);
 268      if ( pkg == NULL ){
 269         fprintf(stderr, "%s : This should never happen. Report this Bug in bugzilla please \n ",__FUNCTION__);
 270         return 0;
 271      }
 272      if (namep) {
 273           *namep = strdup(pkg->name);
 274      }
 275      return 0;
 276 }
 277
 278 int
 279 opkg_verify_file (opkg_conf_t *conf, char *text_file, char *sig_file)
 280 {
 281 #ifdef HAVE_GPGME
 282     int status = -1;
 283     gpgme_ctx_t ctx;
 284     gpgme_data_t sig, text;
 285     gpgme_error_t err = -1;
 286     gpgme_verify_result_t result;
 287     gpgme_signature_t s;
 288
 289     err = gpgme_new (&ctx);
 290
 291     if (err)
 292         return -1;
 293
 294     err = gpgme_data_new_from_file (&sig, sig_file, 1);
 295     if (err)
 296         return -1;
 297
 298     err = gpgme_data_new_from_file (&text, text_file, 1);
 299     if (err)
 300         return -1;
 301
 302     err = gpgme_op_verify (ctx, sig, text, NULL);
 303
 304     result = gpgme_op_verify_result (ctx);
 305
 306     /* see if any of the signitures matched */
 307     s = result->signatures;
 308     while (s)
 309     {
 310         status = gpg_err_code (s->status);
 311         if (status == GPG_ERR_NO_ERROR)
 312             break;
 313         s = s->next;
 314     }
 315
 316     gpgme_data_release (sig);
 317     gpgme_data_release (text);
 318     gpgme_release (ctx);
 319
 320     return status;
 321 #else
 322     opkg_message (conf, OPKG_NOTICE, "Signature check for %s was skipped because GPG support was not enabled in this build\n");
 323     return 0;
 324 #endif
 325 }