libopkg/pkg_hash.c

   1 /* opkg_hash.c - the opkg package management system
   2
   3    Steven M. Ayer
   4
   5    Copyright (C) 2002 Compaq Computer Corporation
   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 <stdio.h>
  19
  20 #include "hash_table.h"
  21 #include "pkg.h"
  22 #include "opkg_message.h"
  23 #include "pkg_vec.h"
  24 #include "pkg_hash.h"
  25 #include "parse_util.h"
  26 #include "pkg_parse.h"
  27 #include "opkg_utils.h"
  28 #include "sprintf_alloc.h"
  29 #include "file_util.h"
  30 #include "libbb/libbb.h"
  31 #include "libbb/gzip.h"
  32
  33 void pkg_hash_init(void)
  34 {
  35         hash_table_init("pkg-hash", &conf->pkg_hash,
  36                         OPKG_CONF_DEFAULT_HASH_LEN);
  37 }
  38
  39 static void free_pkgs(const char *key, void *entry, void *data)
  40 {
  41         int i;
  42         abstract_pkg_t *ab_pkg;
  43
  44         /* Each entry in the hash table is an abstract package, which contains
  45          * a list of packages that provide the abstract package.
  46          */
  47
  48         ab_pkg = (abstract_pkg_t *) entry;
  49
  50         if (ab_pkg->pkgs) {
  51                 for (i = 0; i < ab_pkg->pkgs->len; i++) {
  52                         pkg_deinit(ab_pkg->pkgs->pkgs[i]);
  53                         free(ab_pkg->pkgs->pkgs[i]);
  54                 }
  55         }
  56
  57         abstract_pkg_vec_free(ab_pkg->provided_by);
  58         abstract_pkg_vec_free(ab_pkg->replaced_by);
  59         pkg_vec_free(ab_pkg->pkgs);
  60         free(ab_pkg->depended_upon_by);
  61         free(ab_pkg->name);
  62         free(ab_pkg);
  63 }
  64
  65 void pkg_hash_deinit(void)
  66 {
  67         hash_table_foreach(&conf->pkg_hash, free_pkgs, NULL);
  68         hash_table_deinit(&conf->pkg_hash);
  69 }
  70
  71 int dist_hash_add_from_file(const char *lists_dir, pkg_src_t * dist)
  72 {
  73         nv_pair_list_elt_t *l;
  74         char *list_file, *subname;
  75
  76         list_for_each_entry(l, &conf->arch_list.head, node) {
  77                 nv_pair_t *nv = (nv_pair_t *) l->data;
  78                 sprintf_alloc(&subname, "%s-%s", dist->name, nv->name);
  79                 sprintf_alloc(&list_file, "%s/%s", lists_dir, subname);
  80
  81                 if (file_exists(list_file)) {
  82                         if (pkg_hash_add_from_file(list_file, dist, NULL, 0)) {
  83                                 free(list_file);
  84                                 return -1;
  85                         }
  86                         pkg_src_list_append(&conf->pkg_src_list, subname,
  87                                             dist->value, "__dummy__", 0);
  88                 }
  89
  90                 free(list_file);
  91         }
  92
  93         return 0;
  94 }
  95
  96 int
  97 pkg_hash_add_from_file(const char *file_name,
  98                        pkg_src_t * src, pkg_dest_t * dest, int is_status_file)
  99 {
 100         pkg_t *pkg;
 101         FILE *fp;
 102         char *buf;
 103         const size_t len = 4096;
 104         int ret = 0;
 105         struct gzip_handle zh;
 106
 107         if (src && src->gzip) {
 108                 fp = gzip_fdopen(&zh, file_name);
 109         } else {
 110                 fp = fopen(file_name, "r");
 111         }
 112
 113         if (fp == NULL) {
 114                 opkg_perror(ERROR, "Failed to open %s", file_name);
 115                 return -1;
 116         }
 117
 118         buf = xmalloc(len);
 119
 120         do {
 121                 pkg = pkg_new();
 122                 pkg->src = src;
 123                 pkg->dest = dest;
 124
 125                 ret = parse_from_stream_nomalloc(pkg_parse_line, pkg, fp, 0,
 126                                                  &buf, len);
 127
 128                 if (pkg->name == NULL) {
 129                         /* probably just a blank line */
 130                         ret = 1;
 131                 }
 132
 133                 if (ret) {
 134                         pkg_deinit(pkg);
 135                         free(pkg);
 136                         if (ret == -1)
 137                                 break;
 138                         if (ret == 1)
 139                                 /* Probably a blank line, continue parsing. */
 140                                 ret = 0;
 141                         continue;
 142                 }
 143
 144                 if (!pkg_get_architecture(pkg) || !pkg_get_arch_priority(pkg)) {
 145                         char *version_str = pkg_version_str_alloc(pkg);
 146                         opkg_msg(NOTICE, "Package %s version %s has no "
 147                                  "valid architecture, ignoring.\n",
 148                                  pkg->name, version_str);
 149                         free(version_str);
 150                         continue;
 151                 }
 152
 153                 hash_insert_pkg(pkg, is_status_file);
 154
 155         } while (!feof(fp));
 156
 157         free(buf);
 158         fclose(fp);
 159
 160         if (src && src->gzip)
 161                 gzip_close(&zh);
 162
 163         return ret;
 164 }
 165
 166 /*
 167  * Load in feed files from the cached "src" and/or "src/gz" locations.
 168  */
 169 int pkg_hash_load_feeds(void)
 170 {
 171         pkg_src_list_elt_t *iter;
 172         pkg_src_t *src, *subdist;
 173         char *list_file, *lists_dir;
 174
 175         opkg_msg(INFO, "\n");
 176
 177         lists_dir = conf->restrict_to_default_dest ?
 178             conf->default_dest->lists_dir : conf->lists_dir;
 179
 180         for (iter = void_list_first(&conf->pkg_src_list); iter;
 181              iter = void_list_next(&conf->pkg_src_list, iter)) {
 182
 183                 src = (pkg_src_t *) iter->data;
 184
 185                 sprintf_alloc(&list_file, "%s/%s", lists_dir, src->name);
 186
 187                 if (file_exists(list_file)) {
 188                         if (pkg_hash_add_from_file(list_file, src, NULL, 0)) {
 189                                 free(list_file);
 190                                 return -1;
 191                         }
 192                 }
 193                 free(list_file);
 194         }
 195
 196         return 0;
 197 }
 198
 199 /*
 200  * Load in status files from the configured "dest"s.
 201  */
 202 int pkg_hash_load_status_files(void)
 203 {
 204         pkg_dest_list_elt_t *iter;
 205         pkg_dest_t *dest;
 206
 207         opkg_msg(INFO, "\n");
 208
 209         for (iter = void_list_first(&conf->pkg_dest_list); iter;
 210              iter = void_list_next(&conf->pkg_dest_list, iter)) {
 211
 212                 dest = (pkg_dest_t *) iter->data;
 213
 214                 if (file_exists(dest->status_file_name)) {
 215                         if (pkg_hash_add_from_file
 216                             (dest->status_file_name, NULL, dest, 1))
 217                                 return -1;
 218                 }
 219         }
 220
 221         return 0;
 222 }
 223
 224 pkg_t *pkg_hash_fetch_best_installation_candidate(abstract_pkg_t * apkg,
 225                                                   int (*constraint_fcn) (pkg_t *
 226                                                                          pkg,
 227                                                                          void
 228                                                                          *cdata),
 229                                                   void *cdata, int quiet)
 230 {
 231         int i, j;
 232         int nprovides = 0;
 233         int nmatching = 0;
 234         int wrong_arch_found = 0;
 235         int arch_priority;
 236         pkg_vec_t *matching_pkgs;
 237         abstract_pkg_vec_t *matching_apkgs;
 238         abstract_pkg_vec_t *provided_apkg_vec;
 239         abstract_pkg_t **provided_apkgs;
 240         abstract_pkg_vec_t *providers;
 241         pkg_t *latest_installed_parent = NULL;
 242         pkg_t *latest_matching = NULL;
 243         pkg_t *priorized_matching = NULL;
 244         pkg_t *held_pkg = NULL;
 245         pkg_t *good_pkg_by_name = NULL;
 246
 247         if (apkg == NULL || apkg->provided_by == NULL
 248             || (apkg->provided_by->len == 0))
 249                 return NULL;
 250
 251         matching_pkgs = pkg_vec_alloc();
 252         matching_apkgs = abstract_pkg_vec_alloc();
 253         providers = abstract_pkg_vec_alloc();
 254
 255         opkg_msg(DEBUG, "Best installation candidate for %s:\n", apkg->name);
 256
 257         provided_apkg_vec = apkg->provided_by;
 258         nprovides = provided_apkg_vec->len;
 259         provided_apkgs = provided_apkg_vec->pkgs;
 260         if (nprovides > 1)
 261                 opkg_msg(DEBUG, "apkg=%s nprovides=%d.\n", apkg->name,
 262                          nprovides);
 263
 264         /* accumulate all the providers */
 265         for (i = 0; i < nprovides; i++) {
 266                 abstract_pkg_t *provider_apkg = provided_apkgs[i];
 267                 opkg_msg(DEBUG, "Adding %s to providers.\n",
 268                          provider_apkg->name);
 269                 abstract_pkg_vec_insert(providers, provider_apkg);
 270         }
 271         nprovides = providers->len;
 272
 273         for (i = 0; i < nprovides; i++) {
 274                 abstract_pkg_t *provider_apkg =
 275                     abstract_pkg_vec_get(providers, i);
 276                 abstract_pkg_t *replacement_apkg = NULL;
 277                 pkg_vec_t *vec;
 278
 279                 if (provider_apkg->replaced_by
 280                     && provider_apkg->replaced_by->len) {
 281                         replacement_apkg = provider_apkg->replaced_by->pkgs[0];
 282                         if (provider_apkg->replaced_by->len > 1) {
 283                                 opkg_msg(NOTICE, "Multiple replacers for %s, "
 284                                          "using first one (%s).\n",
 285                                          provider_apkg->name,
 286                                          replacement_apkg->name);
 287                         }
 288                 }
 289
 290                 if (replacement_apkg)
 291                         opkg_msg(DEBUG,
 292                                  "replacement_apkg=%s for provider_apkg=%s.\n",
 293                                  replacement_apkg->name, provider_apkg->name);
 294
 295                 if (replacement_apkg && (replacement_apkg != provider_apkg)) {
 296                         if (abstract_pkg_vec_contains
 297                             (providers, replacement_apkg))
 298                                 continue;
 299                         else
 300                                 provider_apkg = replacement_apkg;
 301                 }
 302
 303                 if (!(vec = provider_apkg->pkgs)) {
 304                         opkg_msg(DEBUG, "No pkgs for provider_apkg %s.\n",
 305                                  provider_apkg->name);
 306                         continue;
 307                 }
 308
 309                 /* now check for supported architecture */
 310                 {
 311                         int max_count = 0;
 312
 313                         /* count packages matching max arch priority and keep track of last one */
 314                         for (j = 0; j < vec->len; j++) {
 315                                 pkg_t *maybe = vec->pkgs[j];
 316                                 arch_priority = pkg_get_arch_priority(maybe);
 317
 318                                 opkg_msg(DEBUG,
 319                                          "%s arch=%s arch_priority=%d version=%s.\n",
 320                                          maybe->name, pkg_get_architecture(maybe),
 321                                          arch_priority, pkg_get_string(maybe, PKG_VERSION));
 322                                 /* We make sure not to add the same package twice. Need to search for the reason why
 323                                    they show up twice sometimes. */
 324                                 if ((arch_priority > 0)
 325                                     &&
 326                                     (!pkg_vec_contains(matching_pkgs, maybe))) {
 327                                         max_count++;
 328                                         abstract_pkg_vec_insert(matching_apkgs,
 329                                                                 maybe->parent);
 330                                         pkg_vec_insert(matching_pkgs, maybe);
 331                                 }
 332                         }
 333
 334                         if (vec->len > 0 && matching_pkgs->len < 1)
 335                                 wrong_arch_found = 1;
 336                 }
 337         }
 338
 339         if (matching_pkgs->len < 1) {
 340                 if (wrong_arch_found)
 341                         opkg_msg(ERROR, "Packages for %s found, but"
 342                                  " incompatible with the architectures configured\n",
 343                                  apkg->name);
 344                 pkg_vec_free(matching_pkgs);
 345                 abstract_pkg_vec_free(matching_apkgs);
 346                 abstract_pkg_vec_free(providers);
 347                 return NULL;
 348         }
 349
 350         if (matching_pkgs->len > 1)
 351                 pkg_vec_sort(matching_pkgs,
 352                              pkg_name_version_and_architecture_compare);
 353         if (matching_apkgs->len > 1)
 354                 abstract_pkg_vec_sort(matching_pkgs, abstract_pkg_name_compare);
 355
 356         for (i = 0; i < matching_pkgs->len; i++) {
 357                 pkg_t *matching = matching_pkgs->pkgs[i];
 358                 if (constraint_fcn(matching, cdata)) {
 359                         opkg_msg(DEBUG, "Candidate: %s %s.\n",
 360                                  matching->name, pkg_get_string(matching, PKG_VERSION));
 361                         good_pkg_by_name = matching;
 362                         /* It has been provided by hand, so it is what user want */
 363                         if (matching->provided_by_hand == 1)
 364                                 break;
 365                 }
 366         }
 367
 368         for (i = 0; i < matching_pkgs->len; i++) {
 369                 pkg_t *matching = matching_pkgs->pkgs[i];
 370                 latest_matching = matching;
 371                 if (matching->parent->state_status == SS_INSTALLED
 372                     || matching->parent->state_status == SS_UNPACKED)
 373                         latest_installed_parent = matching;
 374                 if (matching->state_flag & (SF_HOLD | SF_PREFER)) {
 375                         if (held_pkg)
 376                                 opkg_msg(NOTICE,
 377                                          "Multiple packages (%s and %s) providing"
 378                                          " same name marked HOLD or PREFER. "
 379                                          "Using latest.\n", held_pkg->name,
 380                                          matching->name);
 381                         held_pkg = matching;
 382                 }
 383         }
 384
 385         if (!good_pkg_by_name && !held_pkg && !latest_installed_parent
 386             && matching_apkgs->len > 1 && !quiet) {
 387                 int prio = 0;
 388                 for (i = 0; i < matching_pkgs->len; i++) {
 389                         pkg_t *matching = matching_pkgs->pkgs[i];
 390                         arch_priority = pkg_get_arch_priority(matching);
 391                         if (arch_priority > prio) {
 392                                 priorized_matching = matching;
 393                                 prio = arch_priority;
 394                                 opkg_msg(DEBUG, "Match %s with priority %i.\n",
 395                                          matching->name, prio);
 396                         }
 397                 }
 398
 399         }
 400
 401         if (conf->verbosity >= INFO && matching_apkgs->len > 1) {
 402                 opkg_msg(INFO, "%d matching pkgs for apkg=%s:\n",
 403                          matching_pkgs->len, apkg->name);
 404                 for (i = 0; i < matching_pkgs->len; i++) {
 405                         pkg_t *matching = matching_pkgs->pkgs[i];
 406                         opkg_msg(INFO, "%s %s %s\n",
 407                                  matching->name, pkg_get_string(matching, PKG_VERSION),
 408                                  pkg_get_architecture(matching));
 409                 }
 410         }
 411
 412         nmatching = matching_apkgs->len;
 413
 414         pkg_vec_free(matching_pkgs);
 415         abstract_pkg_vec_free(matching_apkgs);
 416         abstract_pkg_vec_free(providers);
 417
 418         if (good_pkg_by_name) { /* We found a good candidate, we will install it */
 419                 return good_pkg_by_name;
 420         }
 421         if (held_pkg) {
 422                 opkg_msg(INFO, "Using held package %s.\n", held_pkg->name);
 423                 return held_pkg;
 424         }
 425         if (latest_installed_parent) {
 426                 opkg_msg(INFO,
 427                          "Using latest version of installed package %s.\n",
 428                          latest_installed_parent->name);
 429                 return latest_installed_parent;
 430         }
 431         if (priorized_matching) {
 432                 opkg_msg(INFO, "Using priorized matching %s %s %s.\n",
 433                          priorized_matching->name, pkg_get_string(priorized_matching, PKG_VERSION),
 434                          pkg_get_architecture(priorized_matching));
 435                 return priorized_matching;
 436         }
 437         if (nmatching > 1) {
 438                 opkg_msg(INFO, "No matching pkg out of %d matching_apkgs.\n",
 439                          nmatching);
 440                 return NULL;
 441         }
 442         if (latest_matching) {
 443                 opkg_msg(INFO, "Using latest matching %s %s %s.\n",
 444                          latest_matching->name, pkg_get_string(latest_matching, PKG_VERSION),
 445                          pkg_get_architecture(latest_matching));
 446                 return latest_matching;
 447         }
 448         return NULL;
 449 }
 450
 451 static int pkg_name_constraint_fcn(pkg_t * pkg, void *cdata)
 452 {
 453         const char *name = (const char *)cdata;
 454
 455         if (strcmp(pkg->name, name) == 0)
 456                 return 1;
 457         else
 458                 return 0;
 459 }
 460
 461 static pkg_vec_t *pkg_vec_fetch_by_name(const char *pkg_name)
 462 {
 463         abstract_pkg_t *ab_pkg;
 464
 465         if (!(ab_pkg = abstract_pkg_fetch_by_name(pkg_name)))
 466                 return NULL;
 467
 468         if (ab_pkg->pkgs)
 469                 return ab_pkg->pkgs;
 470
 471         if (ab_pkg->provided_by) {
 472                 abstract_pkg_t *abpkg =
 473                     abstract_pkg_vec_get(ab_pkg->provided_by, 0);
 474                 if (abpkg != NULL)
 475                         return abpkg->pkgs;
 476                 else
 477                         return ab_pkg->pkgs;
 478         }
 479
 480         return NULL;
 481 }
 482
 483 pkg_t *pkg_hash_fetch_best_installation_candidate_by_name(const char *name)
 484 {
 485         abstract_pkg_t *apkg = NULL;
 486
 487         if (!(apkg = abstract_pkg_fetch_by_name(name)))
 488                 return NULL;
 489
 490         return pkg_hash_fetch_best_installation_candidate(apkg,
 491                                                           pkg_name_constraint_fcn,
 492                                                           apkg->name, 0);
 493 }
 494
 495 pkg_t *pkg_hash_fetch_by_name_version(const char *pkg_name, const char *version)
 496 {
 497         pkg_vec_t *vec;
 498         int i;
 499         char *version_str = NULL;
 500
 501         if (!(vec = pkg_vec_fetch_by_name(pkg_name)))
 502                 return NULL;
 503
 504         for (i = 0; i < vec->len; i++) {
 505                 version_str = pkg_version_str_alloc(vec->pkgs[i]);
 506                 if (!strcmp(version_str, version)) {
 507                         free(version_str);
 508                         break;
 509                 }
 510                 free(version_str);
 511         }
 512
 513         if (i == vec->len)
 514                 return NULL;
 515
 516         return vec->pkgs[i];
 517 }
 518
 519 pkg_t *pkg_hash_fetch_installed_by_name_dest(const char *pkg_name,
 520                                              pkg_dest_t * dest)
 521 {
 522         pkg_vec_t *vec;
 523         int i;
 524
 525         if (!(vec = pkg_vec_fetch_by_name(pkg_name))) {
 526                 return NULL;
 527         }
 528
 529         for (i = 0; i < vec->len; i++)
 530                 if ((vec->pkgs[i]->state_status == SS_INSTALLED
 531                      || vec->pkgs[i]->state_status == SS_UNPACKED)
 532                     && vec->pkgs[i]->dest == dest) {
 533                         return vec->pkgs[i];
 534                 }
 535
 536         return NULL;
 537 }
 538
 539 pkg_t *pkg_hash_fetch_installed_by_name(const char *pkg_name)
 540 {
 541         pkg_vec_t *vec;
 542         int i;
 543
 544         if (!(vec = pkg_vec_fetch_by_name(pkg_name))) {
 545                 return NULL;
 546         }
 547
 548         for (i = 0; i < vec->len; i++) {
 549                 if (vec->pkgs[i]->state_status == SS_INSTALLED
 550                     || vec->pkgs[i]->state_status == SS_UNPACKED) {
 551                         return vec->pkgs[i];
 552                 }
 553         }
 554
 555         return NULL;
 556 }
 557
 558 static void
 559 pkg_hash_fetch_available_helper(const char *pkg_name, void *entry, void *data)
 560 {
 561         int j;
 562         abstract_pkg_t *ab_pkg = (abstract_pkg_t *) entry;
 563         pkg_vec_t *all = (pkg_vec_t *) data;
 564         pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 565
 566         if (!pkg_vec)
 567                 return;
 568
 569         for (j = 0; j < pkg_vec->len; j++) {
 570                 pkg_t *pkg = pkg_vec->pkgs[j];
 571                 pkg_vec_insert(all, pkg);
 572         }
 573 }
 574
 575 void pkg_hash_fetch_available(pkg_vec_t * all)
 576 {
 577         hash_table_foreach(&conf->pkg_hash, pkg_hash_fetch_available_helper,
 578                            all);
 579 }
 580
 581 static void
 582 pkg_hash_fetch_all_installed_helper(const char *pkg_name, void *entry,
 583                                     void *data)
 584 {
 585         abstract_pkg_t *ab_pkg = (abstract_pkg_t *) entry;
 586         pkg_vec_t *all = (pkg_vec_t *) data;
 587         pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 588         int j;
 589
 590         if (!pkg_vec)
 591                 return;
 592
 593         for (j = 0; j < pkg_vec->len; j++) {
 594                 pkg_t *pkg = pkg_vec->pkgs[j];
 595                 if (pkg->state_status == SS_INSTALLED
 596                     || pkg->state_status == SS_UNPACKED)
 597                         pkg_vec_insert(all, pkg);
 598         }
 599 }
 600
 601 void pkg_hash_fetch_all_installed(pkg_vec_t * all)
 602 {
 603         hash_table_foreach(&conf->pkg_hash, pkg_hash_fetch_all_installed_helper,
 604                            all);
 605 }
 606
 607 /*
 608  * This assumes that the abstract pkg doesn't exist.
 609  */
 610 static abstract_pkg_t *add_new_abstract_pkg_by_name(const char *pkg_name)
 611 {
 612         abstract_pkg_t *ab_pkg;
 613
 614         ab_pkg = abstract_pkg_new();
 615
 616         ab_pkg->name = xstrdup(pkg_name);
 617         hash_table_insert(&conf->pkg_hash, pkg_name, ab_pkg);
 618
 619         return ab_pkg;
 620 }
 621
 622 abstract_pkg_t *ensure_abstract_pkg_by_name(const char *pkg_name)
 623 {
 624         abstract_pkg_t *ab_pkg;
 625
 626         if (!(ab_pkg = abstract_pkg_fetch_by_name(pkg_name)))
 627                 ab_pkg = add_new_abstract_pkg_by_name(pkg_name);
 628
 629         return ab_pkg;
 630 }
 631
 632 void hash_insert_pkg(pkg_t * pkg, int set_status)
 633 {
 634         abstract_pkg_t *ab_pkg;
 635
 636         ab_pkg = ensure_abstract_pkg_by_name(pkg->name);
 637         if (!ab_pkg->pkgs)
 638                 ab_pkg->pkgs = pkg_vec_alloc();
 639
 640         if (pkg->state_status == SS_INSTALLED) {
 641                 ab_pkg->state_status = SS_INSTALLED;
 642         } else if (pkg->state_status == SS_UNPACKED) {
 643                 ab_pkg->state_status = SS_UNPACKED;
 644         }
 645
 646         buildDepends(pkg);
 647
 648         buildProvides(ab_pkg, pkg);
 649
 650         init_providelist(pkg, NULL);
 651
 652         /* Need to build the conflicts graph before replaces for correct
 653          * calculation of replaced_by relation.
 654          */
 655         buildConflicts(pkg);
 656
 657         buildReplaces(ab_pkg, pkg);
 658
 659         buildDependedUponBy(pkg, ab_pkg);
 660
 661         pkg_vec_insert_merge(ab_pkg->pkgs, pkg, set_status);
 662         pkg->parent = ab_pkg;
 663 }
 664
 665 static const char *strip_offline_root(const char *file_name)
 666 {
 667         unsigned int len;
 668
 669         if (conf->offline_root) {
 670                 len = strlen(conf->offline_root);
 671                 if (strncmp(file_name, conf->offline_root, len) == 0)
 672                         file_name += len;
 673         }
 674
 675         return file_name;
 676 }
 677
 678 void file_hash_remove(const char *file_name)
 679 {
 680         file_name = strip_offline_root(file_name);
 681         hash_table_remove(&conf->file_hash, file_name);
 682 }
 683
 684 pkg_t *file_hash_get_file_owner(const char *file_name)
 685 {
 686         file_name = strip_offline_root(file_name);
 687         return hash_table_get(&conf->file_hash, file_name);
 688 }
 689
 690 void file_hash_set_file_owner(const char *file_name, pkg_t * owning_pkg)
 691 {
 692         pkg_t *old_owning_pkg;
 693         int file_name_len = strlen(file_name);
 694
 695         if (file_name[file_name_len - 1] == '/')
 696                 return;
 697
 698         file_name = strip_offline_root(file_name);
 699
 700         old_owning_pkg = hash_table_get(&conf->file_hash, file_name);
 701         hash_table_insert(&conf->file_hash, file_name, owning_pkg);
 702
 703         if (old_owning_pkg) {
 704                 pkg_get_installed_files(old_owning_pkg);
 705                 str_list_remove_elt(old_owning_pkg->installed_files, file_name);
 706                 pkg_free_installed_files(old_owning_pkg);
 707
 708                 /* mark this package to have its filelist written */
 709                 old_owning_pkg->state_flag |= SF_FILELIST_CHANGED;
 710                 owning_pkg->state_flag |= SF_FILELIST_CHANGED;
 711         }
 712 }