libopkg/opkg.c

   1 /* opkg.c - the opkg  package management system
   2
   3    Thomas Wood <thomas@openedhand.com>
   4
   5    Copyright (C) 2008 OpenMoko Inc
   6
   7    This program is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU General Public License as
   9    published by the Free Software Foundation; either version 2, or (at
  10    your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16  */
  17
  18 #include <config.h>
  19 #include <fnmatch.h>
  20
  21 #include "opkg.h"
  22 #include "opkg_conf.h"
  23 #include "args.h"
  24
  25 #include "opkg_install.h"
  26 #include "opkg_configure.h"
  27 #include "opkg_download.h"
  28 #include "opkg_remove.h"
  29 #include "opkg_upgrade.h"
  30
  31 #include "sprintf_alloc.h"
  32 #include "file_util.h"
  33
  34 #include <libbb/libbb.h>
  35
  36 struct _opkg_t
  37 {
  38   args_t *args;
  39   opkg_conf_t *conf;
  40   opkg_option_t *options;
  41 };
  42
  43 #define opkg_assert(expr) if (!(expr)) { \
  44     printf ("opkg: file %s: line %d (%s): Assertation '%s' failed",\
  45             __FILE__, __LINE__, __PRETTY_FUNCTION__, # expr); abort (); }
  46
  47 #define progress(d, p) d.percentage = p; if (progress_callback) progress_callback (opkg, &d, user_data);
  48 #define SSTRCMP(x,y) (x && y) ? strcmp (x, y) : 0
  49
  50 /** Private Functions ***/
  51
  52 static opkg_package_t*
  53 old_pkg_to_new (pkg_t *old)
  54 {
  55   opkg_package_t *new;
  56
  57   new = opkg_package_new ();
  58
  59 #define sstrdup(x) (x) ? strdup (x) : NULL;
  60
  61   new->name = sstrdup (old->name);
  62   new->version = pkg_version_str_alloc (old);
  63   new->architecture = sstrdup (old->architecture);
  64   if (old->src)
  65     new->repository = sstrdup (old->src->name);
  66   new->description = sstrdup (old->description);
  67   new->tags = sstrdup (old->tags);
  68   new->url = sstrdup (old->url);
  69
  70   new->size = (old->size) ? atoi (old->size) : 0;
  71   new->installed = (old->state_status == SS_INSTALLED);
  72
  73   return new;
  74 }
  75
  76 static int
  77 opkg_configure_packages(opkg_conf_t *conf, char *pkg_name)
  78 {
  79   pkg_vec_t *all;
  80   int i;
  81   pkg_t *pkg;
  82   int r, err = 0;
  83
  84   all = pkg_vec_alloc ();
  85   pkg_hash_fetch_available (&conf->pkg_hash, all);
  86
  87   for (i = 0; i < all->len; i++)
  88   {
  89     pkg = all->pkgs[i];
  90
  91     if (pkg_name && fnmatch (pkg_name, pkg->name, 0))
  92       continue;
  93
  94     if (pkg->state_status == SS_UNPACKED)
  95     {
  96       r = opkg_configure (conf, pkg);
  97       if (r == 0)
  98       {
  99         pkg->state_status = SS_INSTALLED;
 100         pkg->parent->state_status = SS_INSTALLED;
 101         pkg->state_flag &= ~SF_PREFER;
 102       }
 103       else
 104       {
 105         if (!err)
 106           err = r;
 107       }
 108     }
 109   }
 110
 111   pkg_vec_free (all);
 112   return err;
 113 }
 114
 115 struct _curl_cb_data
 116 {
 117   opkg_progress_callback_t cb;
 118   opkg_progress_data_t *progress_data;
 119   opkg_t *opkg;
 120   void *user_data;
 121   int start_range;
 122   int finish_range;
 123 };
 124
 125 int
 126 curl_progress_cb (struct _curl_cb_data *cb_data,
 127                   double t,   /* dltotal */
 128                   double d,   /* dlnow */
 129                   double ultotal,
 130                   double ulnow)
 131 {
 132   int p = (t) ? d * 100 / t : 0;
 133   static int prev = -1;
 134   int progress = 0;
 135
 136   /* prevent the same value being sent twice (can occur due to rounding) */
 137   if (p == prev)
 138     return 0;
 139   prev = p;
 140
 141   if (t < 1)
 142     return 0;
 143
 144   progress = cb_data->start_range + (d / t * ((cb_data->finish_range - cb_data->start_range)));
 145   cb_data->progress_data->percentage = progress;
 146
 147   (cb_data->cb)(cb_data->opkg,
 148                 cb_data->progress_data,
 149                 cb_data->user_data);
 150
 151   return 0;
 152 }
 153
 154
 155 /*** Public API ***/
 156
 157 opkg_package_t *
 158 opkg_package_new ()
 159 {
 160
 161   opkg_package_t *p;
 162
 163   p = malloc (sizeof (opkg_package_t));
 164   memset (p, 0, sizeof (opkg_package_t));
 165
 166   return p;
 167 }
 168
 169 void
 170 opkg_package_free (opkg_package_t *p)
 171 {
 172   free (p->name);
 173   free (p->version);
 174   free (p->architecture);
 175   free (p->description);
 176   free (p->tags);
 177   free (p->url);
 178
 179   free (p);
 180 }
 181
 182 opkg_t *
 183 opkg_new ()
 184 {
 185   opkg_t *opkg;
 186   opkg = malloc (sizeof (opkg_t));
 187
 188   opkg->args = malloc (sizeof (args_t));
 189   args_init (opkg->args);
 190
 191   opkg->conf = malloc (sizeof (opkg_conf_t));
 192   opkg_conf_init (opkg->conf, opkg->args);
 193
 194   opkg_init_options_array (opkg->conf, &opkg->options);
 195   return opkg;
 196 }
 197
 198 void
 199 opkg_free (opkg_t *opkg)
 200 {
 201   opkg_assert (opkg != NULL);
 202
 203   opkg_conf_deinit (opkg->conf);
 204   args_deinit (opkg->args);
 205 }
 206
 207 int
 208 opkg_re_read_config_files (opkg_t *opkg)
 209 {
 210   args_t *a;
 211   opkg_conf_t *c;
 212
 213   opkg_assert (opkg != NULL);
 214
 215   a = opkg->args;
 216   c = opkg->conf;
 217
 218   /* Unfortunatly, the easiest way to re-read the config files right now is to
 219    * throw away opkg->conf and start again */
 220
 221   /* copy the settings we need to keep */
 222   a->autoremove = c->autoremove;
 223   a->force_depends = c->force_depends;
 224   a->force_defaults = c->force_defaults;
 225   a->force_overwrite = c->force_overwrite;
 226   a->force_downgrade = c->force_downgrade;
 227   a->force_reinstall = c->force_reinstall;
 228   a->force_removal_of_dependent_packages = c->force_removal_of_dependent_packages;
 229   a->force_removal_of_essential_packages = c->force_removal_of_essential_packages;
 230   a->nodeps = c->nodeps;
 231   a->noaction = c->noaction;
 232   a->query_all = c->query_all;
 233   a->multiple_providers = c->multiple_providers;
 234   a->verbosity = c->verbosity;
 235
 236   if (c->offline_root)
 237   {
 238     if (a->offline_root) free (a->offline_root);
 239     a->offline_root = strdup (c->offline_root);
 240   }
 241
 242   if (c->offline_root_pre_script_cmd)
 243   {
 244     if (a->offline_root_pre_script_cmd) free (a->offline_root_pre_script_cmd);
 245     a->offline_root_pre_script_cmd = strdup (c->offline_root_pre_script_cmd);
 246   }
 247
 248   if (c->offline_root_post_script_cmd)
 249   {
 250     if (a->offline_root_post_script_cmd) free (a->offline_root_post_script_cmd);
 251     a->offline_root_post_script_cmd = strdup (c->offline_root_post_script_cmd);
 252   }
 253
 254   /* throw away old opkg_conf and start again */
 255   opkg_conf_deinit (opkg->conf);
 256   opkg_conf_init (opkg->conf, opkg->args);
 257
 258   free (opkg->options);
 259   opkg_init_options_array (opkg->conf, &opkg->options);
 260
 261   return 0;
 262 }
 263
 264 void
 265 opkg_get_option (opkg_t *opkg, char *option, void **value)
 266 {
 267   int i = 0;
 268   opkg_option_t *options;
 269
 270   opkg_assert (opkg != NULL);
 271   opkg_assert (option != NULL);
 272   opkg_assert (value != NULL);
 273
 274   options = opkg->options;
 275
 276   /* look up the option
 277    * TODO: this would be much better as a hash table
 278    */
 279   while (options[i].name)
 280   {
 281     if (strcmp (options[i].name, option) != 0)
 282     {
 283       i++;
 284       continue;
 285     }
 286   }
 287
 288   /* get the option */
 289   switch (options[i].type)
 290   {
 291   case OPKG_OPT_TYPE_BOOL:
 292     *((int *) value) = *((int *) options[i].value);
 293     return;
 294
 295   case OPKG_OPT_TYPE_INT:
 296     *((int *) value) = *((int *) options[i].value);
 297     return;
 298
 299   case OPKG_OPT_TYPE_STRING:
 300     *((char **)value) = strdup (options[i].value);
 301     return;
 302   }
 303
 304 }
 305
 306 void
 307 opkg_set_option (opkg_t *opkg, char *option, void *value)
 308 {
 309   int i = 0, found = 0;
 310   opkg_option_t *options;
 311
 312   opkg_assert (opkg != NULL);
 313   opkg_assert (option != NULL);
 314   opkg_assert (value != NULL);
 315
 316   options = opkg->options;
 317
 318   /* look up the option
 319    * TODO: this would be much better as a hash table
 320    */
 321   while (options[i].name)
 322   {
 323     if (strcmp (options[i].name, option) == 0)
 324     {
 325       found = 1;
 326       break;
 327     }
 328     i++;
 329   }
 330
 331   if (!found)
 332   {
 333     /* XXX: Warning: Option not found */
 334     return;
 335   }
 336
 337   /* set the option */
 338   switch (options[i].type)
 339   {
 340   case OPKG_OPT_TYPE_BOOL:
 341     if (*((int *) value) == 0)
 342       *((int *)options[i].value) = 0;
 343     else
 344       *((int *)options[i].value) = 1;
 345     return;
 346
 347   case OPKG_OPT_TYPE_INT:
 348     *((int *) options[i].value) = *((int *) value);
 349     return;
 350
 351   case OPKG_OPT_TYPE_STRING:
 352     *((char **)options[i].value) = strdup (value);
 353     return;
 354   }
 355
 356 }
 357
 358 int
 359 opkg_install_package (opkg_t *opkg, const char *package_name, opkg_progress_callback_t progress_callback, void *user_data)
 360 {
 361   int err;
 362   char *package_id = NULL;
 363   opkg_progress_data_t pdata;
 364   pkg_t *new;
 365
 366   opkg_assert (opkg != NULL);
 367   opkg_assert (package_name != NULL);
 368
 369   /* ... */
 370   pkg_info_preinstall_check (opkg->conf);
 371
 372   new = pkg_hash_fetch_best_installation_candidate_by_name (opkg->conf, package_name);
 373
 374   if (!new)
 375   {
 376     /* XXX: Error: Could not find package to install */
 377     return 1;
 378   }
 379   pdata.action = OPKG_INSTALL;
 380   pdata.package = old_pkg_to_new (new);
 381
 382   progress (pdata, 0);
 383
 384   /* download the package */
 385   opkg_prepare_url_for_install (opkg->conf, package_name, &package_id);
 386
 387   progress (pdata, 50);
 388
 389   if (!package_id)
 390     package_id = strdup (package_name);
 391
 392   /* unpack the package */
 393   if (opkg->conf->multiple_providers)
 394   {
 395     err = opkg_install_multi_by_name (opkg->conf, package_id);
 396   }
 397   else
 398   {
 399     err = opkg_install_by_name (opkg->conf, package_id);
 400   }
 401
 402   if (err)
 403     return err;
 404
 405   progress (pdata, 75);
 406
 407   /* run configure scripts, etc. */
 408   err = opkg_configure_packages (opkg->conf, NULL);
 409   if (err)
 410     return err;
 411
 412   /* write out status files and file lists */
 413   opkg_conf_write_status_files (opkg->conf);
 414   pkg_write_changed_filelists (opkg->conf);
 415
 416   progress (pdata, 100);
 417   opkg_package_free (pdata.package);
 418   return 0;
 419 }
 420
 421 int
 422 opkg_remove_package (opkg_t *opkg, const char *package_name, opkg_progress_callback_t progress_callback, void *user_data)
 423 {
 424   pkg_t *pkg = NULL;
 425   pkg_t *pkg_to_remove;
 426   opkg_progress_data_t pdata;
 427
 428   opkg_assert (opkg != NULL);
 429   opkg_assert (package_name != NULL);
 430
 431
 432
 433   pkg_info_preinstall_check (opkg->conf);
 434
 435
 436   pkg = pkg_hash_fetch_installed_by_name (&opkg->conf->pkg_hash, package_name);
 437
 438   if (pkg == NULL)
 439   {
 440     /* XXX: Error: Package not installed. */
 441     return 1;
 442   }
 443
 444   pdata.action = OPKG_REMOVE;
 445   pdata.package = old_pkg_to_new (pkg);
 446   progress (pdata, 0);
 447
 448
 449   if (pkg->state_status == SS_NOT_INSTALLED)
 450   {
 451     /* XXX:  Error: Package seems to be not installed (STATUS = NOT_INSTALLED). */
 452     return 1;
 453   }
 454   progress (pdata, 25);
 455
 456   if (opkg->conf->restrict_to_default_dest)
 457   {
 458     pkg_to_remove = pkg_hash_fetch_installed_by_name_dest (&opkg->conf->pkg_hash,
 459                                                            pkg->name,
 460                                                            opkg->conf->default_dest);
 461   }
 462   else
 463   {
 464     pkg_to_remove = pkg_hash_fetch_installed_by_name (&opkg->conf->pkg_hash, pkg->name );
 465   }
 466
 467
 468   progress (pdata, 75);
 469
 470   opkg_remove_pkg (opkg->conf, pkg_to_remove, 0);
 471
 472   /* write out status files and file lists */
 473   opkg_conf_write_status_files (opkg->conf);
 474   pkg_write_changed_filelists (opkg->conf);
 475
 476
 477   progress (pdata, 100);
 478   opkg_package_free (pdata.package);
 479   return 0;
 480 }
 481
 482 int
 483 opkg_upgrade_package (opkg_t *opkg, const char *package_name, opkg_progress_callback_t progress_callback, void *user_data)
 484 {
 485   pkg_t *pkg;
 486   opkg_progress_data_t pdata;
 487
 488
 489
 490   opkg_assert (opkg != NULL);
 491   opkg_assert (package_name != NULL);
 492
 493   pkg_info_preinstall_check (opkg->conf);
 494
 495   if (opkg->conf->restrict_to_default_dest)
 496   {
 497     pkg = pkg_hash_fetch_installed_by_name_dest (&opkg->conf->pkg_hash,
 498                                                  package_name,
 499                                                  opkg->conf->default_dest);
 500     if (pkg == NULL)
 501     {
 502       /* XXX: Error: Package not installed in default_dest */
 503       return 1;
 504     }
 505   }
 506   else
 507   {
 508     pkg = pkg_hash_fetch_installed_by_name (&opkg->conf->pkg_hash,
 509                                             package_name);
 510   }
 511
 512   if (!pkg)
 513   {
 514     /* XXX: Error: Package not installed */
 515     return 1;
 516   }
 517
 518   pdata.action = OPKG_INSTALL;
 519   pdata.package = old_pkg_to_new (pkg);
 520   progress (pdata, 0);
 521
 522   opkg_upgrade_pkg (opkg->conf, pkg);
 523   progress (pdata, 75);
 524
 525   opkg_configure_packages (opkg->conf, NULL);
 526   progress (pdata, 100);
 527   opkg_package_free (pdata.package);
 528   return 0;
 529 }
 530
 531 int
 532 opkg_upgrade_all (opkg_t *opkg, opkg_progress_callback_t progress_callback, void *user_data)
 533 {
 534   pkg_vec_t *installed;
 535   int err = 0;
 536   int i;
 537   pkg_t *pkg;
 538   opkg_progress_data_t pdata;
 539
 540   pdata.action = OPKG_INSTALL;
 541   pdata.package = NULL;
 542
 543   opkg_assert (opkg != NULL);
 544   progress (pdata, 0);
 545
 546   installed = pkg_vec_alloc ();
 547   pkg_info_preinstall_check (opkg->conf);
 548
 549   pkg_hash_fetch_all_installed (&opkg->conf->pkg_hash, installed);
 550   for (i = 0; i < installed->len; i++)
 551   {
 552     pkg = installed->pkgs[i];
 553
 554     pdata.package = old_pkg_to_new (pkg);
 555     progress (pdata, 99 * i / installed->len);
 556     opkg_package_free (pdata.package);
 557
 558     err += opkg_upgrade_pkg (opkg->conf, pkg);
 559   }
 560   pkg_vec_free (installed);
 561
 562   if (err)
 563     return 1;
 564
 565   err = opkg_configure_packages (opkg->conf, NULL);
 566   if (err)
 567     return 1;
 568
 569   pdata.package = NULL;
 570   progress (pdata, 100);
 571   return 0;
 572 }
 573
 574 int
 575 opkg_update_package_lists (opkg_t *opkg, opkg_progress_callback_t progress_callback, void *user_data)
 576 {
 577   char *tmp;
 578   int err;
 579   char *lists_dir;
 580   pkg_src_list_elt_t *iter;
 581   pkg_src_t *src;
 582   int sources_list_count, sources_done;
 583   opkg_progress_data_t pdata;
 584
 585   opkg_assert (opkg != NULL);
 586
 587   pdata.action = OPKG_DOWNLOAD;
 588   pdata.package = NULL;
 589   progress (pdata, 0);
 590
 591   sprintf_alloc (&lists_dir, "%s",
 592                  (opkg->conf->restrict_to_default_dest)
 593                  ? opkg->conf->default_dest->lists_dir
 594                  : opkg->conf->lists_dir);
 595
 596   if (!file_is_dir (lists_dir))
 597   {
 598     if (file_exists (lists_dir))
 599     {
 600       /* XXX: Error: file exists but is not a directory */
 601       free (lists_dir);
 602       return 1;
 603     }
 604
 605     err = file_mkdir_hier (lists_dir, 0755);
 606     if (err)
 607     {
 608       /* XXX: Error: failed to create directory */
 609       free (lists_dir);
 610       return 1;
 611     }
 612   }
 613
 614   tmp = strdup ("/tmp/opkg.XXXXXX");
 615
 616   if (mkdtemp (tmp) == NULL)
 617   {
 618     /* XXX: Error: could not create temporary file name */
 619     free (lists_dir);
 620     free (tmp);
 621     return 1;
 622   }
 623
 624   /* cout the number of sources so we can give some progress updates */
 625   sources_list_count = 0;
 626   sources_done = 0;
 627   iter = opkg->conf->pkg_src_list.head;
 628   while (iter)
 629   {
 630     sources_list_count++;
 631     iter = iter->next;
 632   }
 633
 634   for (iter = opkg->conf->pkg_src_list.head; iter; iter = iter->next)
 635   {
 636     char *url, *list_file_name;
 637
 638     src = iter->data;
 639
 640     if (src->extra_data)  /* debian style? */
 641       sprintf_alloc (&url, "%s/%s/%s", src->value, src->extra_data,
 642                      src->gzip ? "Packages.gz" : "Packages");
 643     else
 644       sprintf_alloc (&url, "%s/%s", src->value, src->gzip ? "Packages.gz" : "Packages");
 645
 646     sprintf_alloc (&list_file_name, "%s/%s", lists_dir, src->name);
 647     if (src->gzip)
 648     {
 649       char *tmp_file_name;
 650       FILE *in, *out;
 651       struct _curl_cb_data cb_data;
 652
 653       sprintf_alloc (&tmp_file_name, "%s/%s.gz", tmp, src->name);
 654
 655       /* XXX: Note: downloading url */
 656
 657       cb_data.cb = progress_callback;
 658       cb_data.progress_data = &pdata;
 659       cb_data.opkg = opkg;
 660       cb_data.user_data = user_data;
 661       cb_data.start_range = 100 * sources_done / sources_list_count;
 662       cb_data.finish_range = 100 * (sources_done + 1) / sources_list_count;
 663
 664       err = opkg_download (opkg->conf, url, tmp_file_name, (curl_progress_func) curl_progress_cb, &cb_data);
 665
 666       if (err == 0)
 667       {
 668         /* XXX: Note: Inflating downloaded file */
 669         in = fopen (tmp_file_name, "r");
 670         out = fopen (list_file_name, "w");
 671         if (in && out)
 672           unzip (in, out);
 673         else
 674           err = 1;
 675         if (in)
 676           fclose (in);
 677         if (out)
 678           fclose (out);
 679         unlink (tmp_file_name);
 680       }
 681     }
 682     else
 683       err = opkg_download (opkg->conf, url, list_file_name, NULL, NULL);
 684
 685     if (err)
 686     {
 687       /* XXX: Error: download error */
 688     }
 689     free (url);
 690
 691 #ifdef HAVE_GPGME
 692     /* download detached signitures to verify the package lists */
 693     /* get the url for the sig file */
 694     if (src->extra_data)  /* debian style? */
 695       sprintf_alloc (&url, "%s/%s/%s", src->value, src->extra_data,
 696                      "Packages.sig");
 697     else
 698       sprintf_alloc (&url, "%s/%s", src->value, "Packages.sig");
 699
 700     /* create temporary file for it */
 701     char *tmp_file_name;
 702
 703     sprintf_alloc (&tmp_file_name, "%s/%s", tmp, "Packages.sig");
 704
 705     err = opkg_download (opkg->conf, url, tmp_file_name, NULL, NULL);
 706     if (err)
 707     {
 708       /* XXX: Warning: Download failed */
 709     }
 710     else
 711     {
 712       int err;
 713       err = opkg_verify_file (opkg->conf, list_file_name, tmp_file_name);
 714       if (err == 0)
 715       {
 716         /* XXX: Notice: Signature check passed */
 717       }
 718       else
 719       {
 720         /* XXX: Warning: Signature check failed */
 721       }
 722     }
 723     unlink (tmp_file_name);
 724     free (tmp_file_name);
 725     free (url);
 726 #else
 727     /* XXX: Note: Signiture check for %s skipped because GPG support was not
 728      * enabled in this build
 729      */
 730 #endif
 731     free (list_file_name);
 732
 733     sources_done++;
 734     progress (pdata, 100 * sources_done / sources_list_count);
 735   }
 736
 737   rmdir (tmp);
 738   free (tmp);
 739   free (lists_dir);
 740
 741   return 0;
 742 }
 743
 744
 745 int
 746 opkg_list_packages (opkg_t *opkg, opkg_package_callback_t callback, void *user_data)
 747 {
 748   pkg_vec_t *all;
 749   int i;
 750
 751   opkg_assert (opkg);
 752   opkg_assert (callback);
 753
 754   all = pkg_vec_alloc ();
 755   pkg_hash_fetch_available (&opkg->conf->pkg_hash, all);
 756   for (i = 0; i < all->len; i++)
 757   {
 758     pkg_t *pkg;
 759     opkg_package_t *package;
 760
 761     pkg = all->pkgs[i];
 762
 763     package = old_pkg_to_new (pkg);
 764     callback (opkg, package, user_data);
 765   }
 766
 767   pkg_vec_free (all);
 768
 769   return 0;
 770 }
 771
 772 int
 773 opkg_list_upgradable_packages (opkg_t *opkg, opkg_package_callback_t callback, void *user_data)
 774 {
 775   pkg_vec_t *all;
 776   int i;
 777
 778   opkg_assert (opkg);
 779   opkg_assert (callback);
 780
 781   all = pkg_vec_alloc ();
 782   pkg_hash_fetch_available (&opkg->conf->pkg_hash, all);
 783   for (i = 0; i < all->len; i++)
 784   {
 785     pkg_t *old, *new;
 786     int cmp;
 787     opkg_package_t *package;
 788
 789     old = all->pkgs[i];
 790
 791     if (old->state_status != SS_INSTALLED)
 792       continue;
 793
 794     new = pkg_hash_fetch_best_installation_candidate_by_name(opkg->conf, old->name);
 795     if (new == NULL) {
 796       /* XXX: Notice: Assuming locally install package is up to date */
 797       continue;
 798     }
 799
 800     cmp = pkg_compare_versions(old, new);
 801
 802     if (cmp < 0)
 803     {
 804       package = old_pkg_to_new (new);
 805       callback (opkg, package, user_data);
 806     }
 807   }
 808
 809   pkg_vec_free (all);
 810
 811   return 0;
 812 }
 813
 814 opkg_package_t*
 815 opkg_find_package (opkg_t *opkg, const char *name, const char *ver, const char *arch, const char *repo)
 816 {
 817   pkg_vec_t *all;
 818   opkg_package_t *package = NULL;
 819   int i;
 820 #define sstrcmp(x,y) (x && y) ? strcmp (x, y) : 0
 821
 822   opkg_assert (opkg);
 823
 824   all = pkg_vec_alloc ();
 825   pkg_hash_fetch_available (&opkg->conf->pkg_hash, all);
 826   for (i = 0; i < all->len; i++)
 827   {
 828     pkg_t *pkg;
 829     char *pkgv;
 830
 831     pkg = all->pkgs[i];
 832
 833     /* check name */
 834     if (sstrcmp (pkg->name, name))
 835       continue;
 836
 837     /* check version */
 838     pkgv = pkg_version_str_alloc (pkg);
 839     if (sstrcmp (pkgv, ver))
 840     {
 841       free (pkgv);
 842       continue;
 843     }
 844     free (pkgv);
 845
 846     /* check architecture */
 847     if (arch)
 848     {
 849       if (sstrcmp (pkg->architecture, arch))
 850         continue;
 851     }
 852
 853     /* check repository */
 854     if (repo)
 855     {
 856       if (sstrcmp (pkg->src->name, repo))
 857           continue;
 858     }
 859
 860     /* match found */
 861     package = old_pkg_to_new (pkg);
 862     break;
 863   }
 864
 865   pkg_vec_free (all);
 866
 867   return package;
 868 }