libopkg/opkg_install.c

   1 /* opkg_install.c - the opkg package management system
   2
   3    Carl D. Worth
   4
   5    Copyright (C) 2001 University of Southern California
   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 "includes.h"
  19 #include <errno.h>
  20 #include <dirent.h>
  21 #include <glob.h>
  22 #include <time.h>
  23 #include <signal.h>
  24 #ifndef __USE_GNU
  25 typedef void (*sighandler_t)(int);
  26 #endif
  27
  28 #include "pkg.h"
  29 #include "pkg_hash.h"
  30 #include "pkg_extract.h"
  31
  32 #include "opkg_install.h"
  33 #include "opkg_configure.h"
  34 #include "opkg_download.h"
  35 #include "opkg_remove.h"
  36
  37 #include "opkg_utils.h"
  38 #include "opkg_message.h"
  39 #include "opkg_state.h"
  40 #include "opkg_defines.h"
  41
  42 #include "sprintf_alloc.h"
  43 #include "file_util.h"
  44 #include "str_util.h"
  45 #include "xsystem.h"
  46 #include "user.h"
  47
  48 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg);
  49 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg);
  50
  51 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  52 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  53 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
  54 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
  55 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  56 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  57 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  58 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  59 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  60 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  61 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  62 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  63 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  64
  65 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  66 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  67 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg);
  68 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg);
  69 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg);
  70
  71 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg);
  72
  73 static int user_prefers_old_conffile(const char *file, const char *backup);
  74
  75 static char *backup_filename_alloc(const char *file_name);
  76 static int backup_make_backup(opkg_conf_t *conf, const char *file_name);
  77 static int backup_exists_for(const char *file_name);
  78 static int backup_remove(const char *file_name);
  79
  80
  81 int opkg_install_from_file(opkg_conf_t *conf, const char *filename)
  82 {
  83      int err, cmp;
  84      pkg_t *pkg, *old;
  85      char *old_version, *new_version;
  86
  87      pkg = pkg_new();
  88      if (pkg == NULL) {
  89           return ENOMEM;
  90      }
  91
  92      err = pkg_init_from_file(pkg, filename);
  93      if (err) {
  94           return err;
  95      }
  96
  97      if (!pkg->architecture) {
  98           opkg_message(conf, OPKG_ERROR, "Package %s has no Architecture defined.\n", pkg->name);
  99           return -EINVAL;
 100      }
 101
 102      /* XXX: CLEANUP: hash_insert_pkg has a nasty side effect of possibly
 103         freeing the pkg that we pass in. It might be nice to clean this up
 104         if possible.  */
 105      pkg = hash_insert_pkg(&conf->pkg_hash, pkg, 1,conf);
 106      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 107
 108      pkg->local_filename = strdup(filename);
 109
 110      if (old) {
 111           old_version = pkg_version_str_alloc(old);
 112           new_version = pkg_version_str_alloc(pkg);
 113
 114           cmp = pkg_compare_versions(old, pkg);
 115           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 116              cmp = -1 ;                                       /* then we force opkg to downgrade */
 117                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 118                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 119           }
 120           if (cmp > 0) {
 121                  opkg_message(conf, OPKG_NOTICE,
 122                               "Not downgrading package %s on %s from %s to %s.\n",
 123                               old->name, old->dest->name, old_version, new_version);
 124                  pkg->state_want = SW_DEINSTALL;
 125                  pkg->state_flag |= SF_OBSOLETE;
 126                  free(old_version);
 127                  free(new_version);
 128                  return 0;
 129           } else {
 130                free(old_version);
 131                free(new_version);
 132           }
 133      }
 134
 135      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 136      return opkg_install_pkg(conf, pkg,0);
 137 }
 138
 139 opkg_error_t opkg_install_by_name(opkg_conf_t *conf, const char *pkg_name)
 140 {
 141      int cmp, err = 0;
 142      pkg_t *old, *new;
 143      char *old_version, *new_version;
 144
 145      opkg_message(conf, OPKG_DEBUG2, " Getting old  from pkg_hash_fetch \n" );
 146      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
 147      if ( old )
 148         opkg_message(conf, OPKG_DEBUG2, " Old versions from pkg_hash_fetch %s \n",  old->version );
 149
 150      opkg_message(conf, OPKG_DEBUG2, " Getting new  from pkg_hash_fetch \n" );
 151      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name, &err);
 152      if ( new )
 153         opkg_message(conf, OPKG_DEBUG2, " New versions from pkg_hash_fetch %s \n",  new->version );
 154
 155 /* Pigi Basically here is broken the version stuff.
 156    What's happening is that nothing provide the version to differents
 157    functions, so the returned struct is always the latest.
 158    That's why the install by name don't work.
 159 */
 160      opkg_message(conf, OPKG_DEBUG2, " Versions from pkg_hash_fetch in %s ", __FUNCTION__ );
 161
 162      if ( old )
 163         opkg_message(conf, OPKG_DEBUG2, " old %s ", old->version );
 164      if ( new )
 165         opkg_message(conf, OPKG_DEBUG2, " new %s ", new->version );
 166      opkg_message(conf, OPKG_DEBUG2, " \n");
 167
 168      if (new == NULL) {
 169           if (err)
 170             return err;
 171           else
 172             return OPKG_PKG_HAS_NO_CANDIDATE;
 173      }
 174
 175      new->state_flag |= SF_USER;
 176      if (old) {
 177           old_version = pkg_version_str_alloc(old);
 178           new_version = pkg_version_str_alloc(new);
 179
 180           cmp = pkg_compare_versions(old, new);
 181           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 182              opkg_message(conf, OPKG_DEBUG, " Forcing downgrade \n");
 183              cmp = -1 ;                                       /* then we force opkg to downgrade */
 184                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 185                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 186           }
 187           opkg_message(conf, OPKG_DEBUG,
 188                        "Comparing visible versions of pkg %s:"
 189                        "\n\t%s is installed "
 190                        "\n\t%s is available "
 191                        "\n\t%d was comparison result\n",
 192                        pkg_name, old_version, new_version, cmp);
 193           if (cmp == 0 && !conf->force_reinstall) {
 194                opkg_message(conf, OPKG_NOTICE,
 195                             "Package %s (%s) installed in %s is up to date.\n",
 196                             old->name, old_version, old->dest->name);
 197                free(old_version);
 198                free(new_version);
 199                return 0;
 200           } else if (cmp > 0) {
 201                opkg_message(conf, OPKG_NOTICE,
 202                             "Not downgrading package %s on %s from %s to %s.\n",
 203                             old->name, old->dest->name, old_version, new_version);
 204                free(old_version);
 205                free(new_version);
 206                return 0;
 207           } else if (cmp < 0) {
 208                new->dest = old->dest;
 209                old->state_want = SW_DEINSTALL;    /* Here probably the problem for bug 1277 */
 210           }
 211      }
 212
 213      /* XXX: CLEANUP: The error code of opkg_install_by_name is really
 214         supposed to be an opkg_error_t, but opkg_install_pkg could
 215         return any kind of integer, (might be errno from a syscall,
 216         etc.). This is a real mess and will need to be cleaned up if
 217         anyone ever wants to make a nice libopkg. */
 218
 219      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 220      return opkg_install_pkg(conf, new,0);
 221 }
 222
 223 opkg_error_t opkg_install_multi_by_name(opkg_conf_t *conf, const char *pkg_name)
 224 {
 225      abstract_pkg_vec_t *providers = pkg_hash_fetch_all_installation_candidates (&conf->pkg_hash, pkg_name);
 226      int i;
 227      opkg_error_t err;
 228      abstract_pkg_t *ppkg ;
 229
 230      if (providers == NULL)
 231           return OPKG_PKG_HAS_NO_CANDIDATE;
 232
 233      for (i = 0; i < providers->len; i++) {
 234           ppkg = abstract_pkg_vec_get(providers, i);
 235           opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_by_name %d \n",__FUNCTION__, i);
 236           err = opkg_install_by_name(conf, ppkg->name);
 237           if (err)
 238                return err;
 239 /* XXX Maybe ppkg should be freed ? */
 240      }
 241      return 0;
 242 }
 243
 244 /*
 245  * Walk dependence graph starting with pkg, collect packages to be
 246  * installed into pkgs_needed, in dependence order.
 247  */
 248 int pkg_mark_dependencies_for_installation(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *pkgs_needed)
 249 {
 250      int i, err;
 251      pkg_vec_t *depends = pkg_vec_alloc();
 252      char **unresolved = NULL;
 253      int ndepends;
 254
 255      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 256                                                         pkg, depends,
 257                                                         &unresolved);
 258
 259      if (unresolved) {
 260           opkg_message(conf, OPKG_ERROR,
 261                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 262                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 263           while (*unresolved) {
 264                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 265                unresolved++;
 266           }
 267           opkg_message(conf, OPKG_ERROR, "\n");
 268           if (! conf->force_depends) {
 269                opkg_message(conf, OPKG_INFO,
 270                             "This could mean that your package list is out of date or that the packages\n"
 271                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 272                             "of this problem try again with the '-force-depends' option.\n");
 273                pkg_vec_free(depends);
 274                return OPKG_PKG_DEPS_UNSATISFIED;
 275           }
 276      }
 277
 278      if (ndepends <= 0) {
 279           pkg_vec_free(depends);
 280           return 0;
 281      }
 282
 283      for (i = 0; i < depends->len; i++) {
 284           pkg_t *dep = depends->pkgs[i];
 285           /* The package was uninstalled when we started, but another
 286              dep earlier in this loop may have depended on it and pulled
 287              it in, so check first. */
 288           if ((dep->state_status != SS_INSTALLED)
 289               && (dep->state_status != SS_UNPACKED)
 290               && (dep->state_want != SW_INSTALL)) {
 291
 292                /* Mark packages as to-be-installed */
 293                dep->state_want = SW_INSTALL;
 294
 295                /* Dependencies should be installed the same place as pkg */
 296                if (dep->dest == NULL) {
 297                     dep->dest = pkg->dest;
 298                }
 299
 300                err = pkg_mark_dependencies_for_installation(conf, dep, pkgs_needed);
 301                if (err) {
 302                     pkg_vec_free(depends);
 303                     return err;
 304                }
 305           }
 306      }
 307      if (pkgs_needed)
 308           pkg_vec_insert(pkgs_needed, pkg);
 309
 310      pkg_vec_free(depends);
 311
 312      return 0;
 313 }
 314
 315 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg)
 316 {
 317      int i, err;
 318      pkg_vec_t *depends = pkg_vec_alloc();
 319      pkg_t *dep;
 320      char **unresolved = NULL;
 321      int ndepends;
 322
 323      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 324                                                         pkg, depends,
 325                                                         &unresolved);
 326
 327      if (unresolved) {
 328           opkg_message(conf, OPKG_ERROR,
 329                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 330                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 331           while (*unresolved) {
 332                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 333                unresolved++;
 334           }
 335           opkg_message(conf, OPKG_ERROR, "\n");
 336           if (! conf->force_depends) {
 337                opkg_message(conf, OPKG_INFO,
 338                             "This could mean that your package list is out of date or that the packages\n"
 339                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 340                             "of this problem try again with the '-force-depends' option.\n");
 341                pkg_vec_free(depends);
 342                return OPKG_PKG_DEPS_UNSATISFIED;
 343           }
 344      }
 345
 346      if (ndepends <= 0) {
 347           pkg_vec_free(depends);
 348           return 0;
 349      }
 350
 351      /* Mark packages as to-be-installed */
 352      for (i=0; i < depends->len; i++) {
 353           /* Dependencies should be installed the same place as pkg */
 354           if (depends->pkgs[i]->dest == NULL) {
 355                depends->pkgs[i]->dest = pkg->dest;
 356           }
 357           depends->pkgs[i]->state_want = SW_INSTALL;
 358      }
 359
 360      for (i = 0; i < depends->len; i++) {
 361           dep = depends->pkgs[i];
 362           /* The package was uninstalled when we started, but another
 363              dep earlier in this loop may have depended on it and pulled
 364              it in, so check first. */
 365           if ((dep->state_status != SS_INSTALLED)
 366               && (dep->state_status != SS_UNPACKED)) {
 367                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 368                err = opkg_install_pkg(conf, dep,0);
 369                /* mark this package as having been automatically installed to
 370                 * satisfy a dependancy */
 371                dep->auto_installed = 1;
 372                if (err) {
 373                     pkg_vec_free(depends);
 374                     return err;
 375                }
 376           }
 377      }
 378
 379      pkg_vec_free(depends);
 380
 381      return 0;
 382 }
 383
 384
 385 /* check all packages have their dependences satisfied, e.g., in case an upgraded package split */
 386 int opkg_satisfy_all_dependences(opkg_conf_t *conf)
 387 {
 388      if (conf->nodeps == 0) {
 389           int i;
 390           pkg_vec_t *installed = pkg_vec_alloc();
 391           pkg_hash_fetch_all_installed(&conf->pkg_hash, installed);
 392           for (i = 0; i < installed->len; i++) {
 393                pkg_t *pkg = installed->pkgs[i];
 394                satisfy_dependencies_for(conf, pkg);
 395           }
 396           pkg_vec_free(installed);
 397      }
 398      return 0;
 399 }
 400
 401
 402 static int check_conflicts_for(opkg_conf_t *conf, pkg_t *pkg)
 403 {
 404      int i;
 405      pkg_vec_t *conflicts = NULL;
 406      int level;
 407      const char *prefix;
 408      if (conf->force_depends) {
 409           level = OPKG_NOTICE;
 410           prefix = "Warning";
 411      } else {
 412           level = OPKG_ERROR;
 413           prefix = "ERROR";
 414      }
 415
 416      if (!conf->force_depends)
 417           conflicts = (pkg_vec_t *)pkg_hash_fetch_conflicts(&conf->pkg_hash, pkg);
 418
 419      if (conflicts) {
 420           opkg_message(conf, level,
 421                        "%s: The following packages conflict with %s:\n\t", prefix, pkg->name);
 422           i = 0;
 423           while (i < conflicts->len)
 424                opkg_message(conf, level, " %s", conflicts->pkgs[i++]->name);
 425           opkg_message(conf, level, "\n");
 426           pkg_vec_free(conflicts);
 427           return OPKG_PKG_DEPS_UNSATISFIED;
 428      }
 429      return 0;
 430 }
 431
 432 static int update_file_ownership(opkg_conf_t *conf, pkg_t *new_pkg, pkg_t *old_pkg)
 433 {
 434      str_list_t *new_list = pkg_get_installed_files(new_pkg);
 435      str_list_elt_t *iter;
 436
 437      for (iter = str_list_first(new_list); iter; iter = str_list_next(new_list, iter)) {
 438           char *new_file = (char *)iter->data;
 439           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
 440           if (!new_file)
 441                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
 442           if (!owner || (owner == old_pkg))
 443                file_hash_set_file_owner(conf, new_file, new_pkg);
 444      }
 445      if (old_pkg) {
 446           str_list_t *old_list = pkg_get_installed_files(old_pkg);
 447           for (iter = str_list_first(old_list); iter; iter = str_list_next(old_list, iter)) {
 448                char *old_file = (char *)iter->data;
 449                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
 450                if (owner == old_pkg) {
 451                     /* obsolete */
 452                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
 453                }
 454           }
 455           pkg_free_installed_files(old_pkg);
 456      }
 457      pkg_free_installed_files(new_pkg);
 458      return 0;
 459 }
 460
 461 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
 462 {
 463     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
 464
 465     /* sma 6.20.02:  yup; here's the first bit */
 466     /*
 467      * XXX: BUG easy for cworth
 468      * 1) please point the call below to the correct current root destination
 469      * 2) we need to resolve how to check the required space for a pending pkg,
 470      *    my diddling with the .opk file size below isn't going to cut it.
 471      * 3) return a proper error code instead of 1
 472      */
 473      int comp_size, blocks_available;
 474
 475      if (!conf->force_space && pkg->installed_size != NULL) {
 476           blocks_available = get_available_blocks(conf->default_dest->root_dir);
 477
 478           comp_size = strtoul(pkg->installed_size, NULL, 0);
 479           /* round up a blocks count without doing fancy-but-slow casting jazz */
 480           comp_size = (int)((comp_size + 1023) / 1024);
 481
 482           if (comp_size >= blocks_available) {
 483                opkg_message(conf, OPKG_ERROR,
 484                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n",
 485                             blocks_available, conf->default_dest->root_dir, pkg->name, comp_size);
 486                return ENOSPC;
 487           }
 488      }
 489      return 0;
 490 }
 491
 492 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
 493 {
 494      int err;
 495      char *conffiles_file_name;
 496      char *root_dir;
 497      FILE *conffiles_file;
 498
 499      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
 500
 501      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
 502      if (pkg->tmp_unpack_dir == NULL) {
 503           opkg_message(conf, OPKG_ERROR,
 504                        "%s: Failed to create temporary directory '%s': %s\n",
 505                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
 506           return errno;
 507      }
 508
 509      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
 510      if (err) {
 511           return err;
 512      }
 513
 514      /* XXX: CLEANUP: There might be a cleaner place to read in the
 515         conffiles. Seems like I should be able to get everything to go
 516         through pkg_init_from_file. If so, maybe it would make sense to
 517         move all of unpack_pkg_control_files to that function. */
 518
 519      /* Don't need to re-read conffiles if we already have it */
 520      if (!nv_pair_list_empty(&pkg->conffiles)) {
 521           return 0;
 522      }
 523
 524      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
 525      if (! file_exists(conffiles_file_name)) {
 526           free(conffiles_file_name);
 527           return 0;
 528      }
 529
 530      conffiles_file = fopen(conffiles_file_name, "r");
 531      if (conffiles_file == NULL) {
 532           fprintf(stderr, "%s: failed to open %s: %s\n",
 533                   __FUNCTION__, conffiles_file_name, strerror(errno));
 534           free(conffiles_file_name);
 535           return errno;
 536      }
 537      free(conffiles_file_name);
 538
 539      while (1) {
 540           char *cf_name;
 541           char *cf_name_in_dest;
 542
 543           cf_name = file_read_line_alloc(conffiles_file);
 544           if (cf_name == NULL) {
 545                break;
 546           }
 547           str_chomp(cf_name);
 548           if (cf_name[0] == '\0') {
 549                continue;
 550           }
 551
 552           /* Prepend dest->root_dir to conffile name.
 553              Take pains to avoid multiple slashes. */
 554           root_dir = pkg->dest->root_dir;
 555           if (conf->offline_root)
 556                /* skip the offline_root prefix */
 557                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
 558           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
 559                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
 560
 561           /* Can't get an md5sum now, (file isn't extracted yet).
 562              We'll wait until resolve_conffiles */
 563           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
 564
 565           free(cf_name);
 566           free(cf_name_in_dest);
 567      }
 568
 569      fclose(conffiles_file);
 570
 571      return 0;
 572 }
 573
 574 static int pkg_remove_orphan_dependent(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 575 {
 576     int i, j, found;
 577     char *buf, *d_str;
 578     pkg_t *p;
 579     if (!old_pkg)
 580         return 0;
 581     if (!pkg) {
 582         fprintf(stderr, "pkg shall not be NULL here.  please send to the bugzilla!! [%s %d]\n", __FILE__, __LINE__);
 583         return -1;
 584     }
 585     if (old_pkg->depends_count == 0)
 586         return 0;
 587     for (i=0;i<old_pkg->depends_count;i++) {
 588         found = 0;
 589         for (j=0;j<pkg->depends_count;j++) {
 590             if (!strcmp(old_pkg->depends_str[i], pkg->depends_str[j])) {
 591                 found = 1;
 592                 break;
 593             }
 594         }
 595         if (found)
 596             continue;
 597         d_str = old_pkg->depends_str[i];
 598         buf = calloc (1, strlen (d_str) + 1);
 599         j=0;
 600         while (d_str[j] != '\0' && d_str[j] != ' ') {
 601             buf[j]=d_str[j];
 602             ++j;
 603         }
 604         buf[j]='\0';
 605         buf = realloc (buf, strlen (buf) + 1);
 606         p = pkg_hash_fetch_installed_by_name (&conf->pkg_hash, buf);
 607         if (!p) {
 608             fprintf(stderr, "The pkg %s had been removed!!\n", buf);
 609             free(buf);
 610             continue;
 611         }
 612         if (p->auto_installed) {
 613             int deps;
 614             abstract_pkg_t **dependents;
 615             deps = pkg_has_installed_dependents(conf, NULL, p, &dependents);
 616             if (deps == 0) {
 617                 opkg_message (conf, OPKG_NOTICE,"%s was autoinstalled but is now orphaned, remove it.\n", buf);
 618                 opkg_remove_pkg(conf, p, 0);
 619             } else
 620                 opkg_message (conf, OPKG_INFO, "%s was autoinstalled and is still required by %d installed packages\n", buf, deps);
 621         }
 622         free(buf);
 623     }
 624     return 0;
 625 }
 626
 627 /* returns number of installed replacees */
 628 int pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
 629 {
 630      abstract_pkg_t **replaces = pkg->replaces;
 631      int replaces_count = pkg->replaces_count;
 632      int i, j;
 633      for (i = 0; i < replaces_count; i++) {
 634           abstract_pkg_t *ab_pkg = replaces[i];
 635           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 636           if (pkg_vec) {
 637                for (j = 0; j < pkg_vec->len; j++) {
 638                     pkg_t *replacee = pkg_vec->pkgs[j];
 639                     if (!pkg_conflicts(pkg, replacee))
 640                          continue;
 641                     if (replacee->state_status == SS_INSTALLED) {
 642                          pkg_vec_insert(installed_replacees, replacee);
 643                     }
 644                }
 645           }
 646      }
 647      return installed_replacees->len;
 648 }
 649
 650 int pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
 651 {
 652      int i;
 653      int replaces_count = replacees->len;
 654      for (i = 0; i < replaces_count; i++) {
 655           pkg_t *replacee = replacees->pkgs[i];
 656           int err;
 657           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
 658           err = opkg_remove_pkg(conf, replacee,0);
 659           if (err)
 660                return err;
 661      }
 662      return 0;
 663 }
 664
 665 /* to unwind the removal: make sure they are installed */
 666 int pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
 667 {
 668      int i, err;
 669      int replaces_count = replacees->len;
 670      for (i = 0; i < replaces_count; i++) {
 671           pkg_t *replacee = replacees->pkgs[i];
 672           if (replacee->state_status != SS_INSTALLED) {
 673                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 674                err = opkg_install_pkg(conf, replacee,0);
 675                if (err)
 676                     return err;
 677           }
 678      }
 679      return 0;
 680 }
 681
 682 int caught_sigint = 0;
 683 static void opkg_install_pkg_sigint_handler(int sig)
 684 {
 685      caught_sigint = sig;
 686 }
 687
 688 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
 689 static int opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
 690 {
 691      if (old_pkg) {
 692           char message_out[15];
 693           char *old_version = pkg_version_str_alloc(old_pkg);
 694           char *new_version = pkg_version_str_alloc(pkg);
 695           int cmp = pkg_compare_versions(old_pkg, pkg);
 696           int rc = 0;
 697
 698           memset(message_out,'\x0',15);
 699           strncpy (message_out,"Upgrading ",strlen("Upgrading "));
 700           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 701              cmp = -1 ;                                       /* then we force opkg to downgrade */
 702              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
 703                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 704           }
 705
 706           if (cmp > 0) {
 707                opkg_message(conf, OPKG_NOTICE,
 708                             "Not downgrading package %s on %s from %s to %s.\n",
 709                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
 710                rc = 1;
 711           } else if (cmp < 0) {
 712                opkg_message(conf, OPKG_NOTICE,
 713                             "%s%s on %s from %s to %s...\n",
 714                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
 715                pkg->dest = old_pkg->dest;
 716                rc = 0;
 717           } else /* cmp == 0 */ {
 718                if (conf->force_reinstall) {
 719                     opkg_message(conf, OPKG_NOTICE,
 720                                  "Reinstalling %s (%s) on %s...\n",
 721                                  pkg->name, new_version, old_pkg->dest->name);
 722                     pkg->dest = old_pkg->dest;
 723                     rc = 0;
 724                } else {
 725                     opkg_message(conf, OPKG_NOTICE,
 726                                  "Not installing %s (%s) on %s -- already installed.\n",
 727                                  pkg->name, new_version, old_pkg->dest->name);
 728                     rc = 1;
 729                }
 730           }
 731           free(old_version);
 732           free(new_version);
 733           return rc;
 734      } else {
 735       char message_out[15] ;
 736       memset(message_out,'\x0',15);
 737       if ( message )
 738           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
 739       else
 740           strncpy( message_out,"Installing ",strlen("Installing ") );
 741           char *version = pkg_version_str_alloc(pkg);
 742
 743           opkg_message(conf, OPKG_NOTICE,
 744                        "%s%s (%s) to %s...\n", message_out,
 745                        pkg->name, version, pkg->dest->name);
 746           free(version);
 747           return 0;
 748      }
 749 }
 750
 751 /**
 752  *  @brief Really install a pkg_t
 753  */
 754 int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
 755 {
 756      int err = 0;
 757      int message = 0;
 758      pkg_t *old_pkg = NULL;
 759      pkg_vec_t *replacees;
 760      abstract_pkg_t *ab_pkg = NULL;
 761      int old_state_flag;
 762      char* file_md5;
 763      char *pkgid;
 764
 765      if ( from_upgrade )
 766         message = 1;            /* Coming from an upgrade, and should change the output message */
 767
 768      if (!pkg) {
 769           opkg_message(conf, OPKG_ERROR,
 770                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
 771           return OPKG_INSTALL_ERR_INTERNAL;
 772      }
 773
 774      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
 775
 776      if (!pkg_arch_supported(conf, pkg)) {
 777           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
 778                        pkg->architecture, pkg->name);
 779           return OPKG_INSTALL_ERR_INTERNAL;
 780      }
 781      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
 782           err = satisfy_dependencies_for(conf, pkg);
 783           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 784
 785           opkg_message(conf, OPKG_NOTICE,
 786                        "Package %s is already installed in %s.\n",
 787                        pkg->name, pkg->dest->name);
 788           return 0;
 789      }
 790
 791      if (pkg->dest == NULL) {
 792           pkg->dest = conf->default_dest;
 793      }
 794
 795      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 796
 797      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
 798      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
 799
 800      pkg->state_want = SW_INSTALL;
 801      if (old_pkg){
 802          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
 803      }
 804
 805
 806      /* Abhaya: conflicts check */
 807      err = check_conflicts_for(conf, pkg);
 808      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
 809
 810      /* this setup is to remove the upgrade scenario in the end when
 811         installing pkg A, A deps B & B deps on A. So both B and A are
 812         installed. Then A's installation is started resulting in an
 813         uncecessary upgrade */
 814      if (pkg->state_status == SS_INSTALLED
 815          && conf->force_reinstall == 0) return 0;
 816
 817      err = verify_pkg_installable(conf, pkg);
 818      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
 819
 820      if (pkg->local_filename == NULL) {
 821           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
 822           if (err) {
 823                opkg_message(conf, OPKG_ERROR,
 824                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
 825                             pkg->name);
 826                return OPKG_INSTALL_ERR_DOWNLOAD;
 827           }
 828      }
 829
 830      /* check that the repository is valid */
 831      #if HAVE_GPGME
 832      char *list_file_name, *sig_file_name, *lists_dir;
 833
 834      /* check to ensure the package has come from a repository */
 835      if (conf->check_signature && pkg->src)
 836      {
 837        sprintf_alloc (&lists_dir, "%s",
 838                      (conf->restrict_to_default_dest)
 839                       ? conf->default_dest->lists_dir
 840                       : conf->lists_dir);
 841        sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
 842        sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
 843
 844        if (file_exists (sig_file_name))
 845        {
 846          if (opkg_verify_file (conf, list_file_name, sig_file_name))
 847            return OPKG_INSTALL_ERR_SIGNATURE;
 848        }
 849
 850        free (lists_dir);
 851        free (list_file_name);
 852        free (sig_file_name);
 853      }
 854      #endif
 855
 856      /* Check for md5 values */
 857      if (pkg->md5sum)
 858      {
 859          file_md5 = file_md5sum_alloc(pkg->local_filename);
 860          if (strcmp(file_md5, pkg->md5sum))
 861          {
 862               opkg_message(conf, OPKG_ERROR,
 863                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 864                            pkg->name);
 865               free(file_md5);
 866               return OPKG_INSTALL_ERR_MD5;
 867          }
 868          free(file_md5);
 869      }
 870
 871      if (pkg->tmp_unpack_dir == NULL) {
 872           unpack_pkg_control_files(conf, pkg);
 873      }
 874
 875      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 876 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 877 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 878      err = update_file_ownership(conf, pkg, old_pkg);
 879      if (err) { return OPKG_ERR_UNKNOWN; }
 880
 881      if (conf->nodeps == 0) {
 882           err = satisfy_dependencies_for(conf, pkg);
 883           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 884      }
 885
 886      replacees = pkg_vec_alloc();
 887      pkg_get_installed_replacees(conf, pkg, replacees);
 888
 889      sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 890      opkg_set_current_state (conf, OPKG_STATE_INSTALLING_PKG, pkgid);
 891      free (pkgid);
 892
 893      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 894      {
 895           sigset_t newset, oldset;
 896           sighandler_t old_handler = NULL;
 897           int use_signal = 0;
 898           caught_sigint = 0;
 899           if (use_signal) {
 900                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 901           } else {
 902                sigemptyset(&newset);
 903                sigaddset(&newset, SIGINT);
 904                sigprocmask(SIG_BLOCK, &newset, &oldset);
 905           }
 906
 907           opkg_state_changed++;
 908           pkg->state_flag |= SF_FILELIST_CHANGED;
 909
 910           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
 911
 912           /* XXX: BUG: we really should treat replacement more like an upgrade
 913            *      Instead, we're going to remove the replacees
 914            */
 915           err = pkg_remove_installed_replacees(conf, replacees);
 916           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 917
 918           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 919           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 920
 921           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 922           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 923
 924           err = preinst_configure(conf, pkg, old_pkg);
 925           if (err) goto UNWIND_PREINST_CONFIGURE;
 926
 927           err = backup_modified_conffiles(conf, pkg, old_pkg);
 928           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 929
 930           err = check_data_file_clashes(conf, pkg, old_pkg);
 931           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 932
 933           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 934           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 935
 936           if (conf->noaction) return 0;
 937
 938           /* point of no return: no unwinding after this */
 939           if (old_pkg && !conf->force_reinstall) {
 940                old_pkg->state_want = SW_DEINSTALL;
 941
 942                if (old_pkg->state_flag & SF_NOPRUNE) {
 943                     opkg_message(conf, OPKG_INFO,
 944                                  "  not removing obsolesced files because package marked noprune\n");
 945                } else {
 946                     opkg_message(conf, OPKG_INFO,
 947                                  "  removing obsolesced files\n");
 948                     remove_obsolesced_files(conf, pkg, old_pkg);
 949                }
 950                /* removing files from old package, to avoid ghost files */
 951                remove_data_files_and_list(conf, old_pkg);
 952 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 953                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 954                remove_postrm(conf, old_pkg);
 955 /* Pigi */
 956
 957           }
 958
 959
 960           opkg_message(conf, OPKG_INFO,
 961                        "  installing maintainer scripts\n");
 962           install_maintainer_scripts(conf, pkg, old_pkg);
 963
 964           /* the following just returns 0 */
 965           remove_disappeared(conf, pkg);
 966
 967           opkg_message(conf, OPKG_INFO,
 968                        "  installing data files\n");
 969           install_data_files(conf, pkg);
 970
 971 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
 972           err = check_data_file_clashes_change(conf, pkg, old_pkg);
 973
 974           opkg_message(conf, OPKG_INFO,
 975                        "  resolving conf files\n");
 976           resolve_conffiles(conf, pkg);
 977
 978           pkg->state_status = SS_UNPACKED;
 979           old_state_flag = pkg->state_flag;
 980           pkg->state_flag &= ~SF_PREFER;
 981           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
 982
 983           if (old_pkg && !conf->force_reinstall) {
 984                old_pkg->state_status = SS_NOT_INSTALLED;
 985           }
 986
 987           time(&pkg->installed_time);
 988
 989           opkg_message(conf, OPKG_INFO,
 990                        "  cleanup temp files\n");
 991           cleanup_temporary_files(conf, pkg);
 992
 993           ab_pkg = pkg->parent;
 994           if (ab_pkg)
 995                ab_pkg->state_status = pkg->state_status;
 996
 997           opkg_message(conf, OPKG_INFO, "Done.\n");
 998
 999           if (use_signal)
1000                signal(SIGINT, old_handler);
1001           else
1002                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1003           pkg_vec_free (replacees);
1004           return 0;
1005
1006
1007      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1008           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1009      UNWIND_CHECK_DATA_FILE_CLASHES:
1010           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1011      UNWIND_BACKUP_MODIFIED_CONFFILES:
1012           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1013      UNWIND_PREINST_CONFIGURE:
1014           preinst_configure_unwind(conf, pkg, old_pkg);
1015      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1016           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1017      UNWIND_PRERM_UPGRADE_OLD_PKG:
1018           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1019      UNWIND_REMOVE_INSTALLED_REPLACEES:
1020           pkg_remove_installed_replacees_unwind(conf, replacees);
1021
1022           opkg_message(conf, OPKG_INFO,
1023                        "  cleanup temp files\n");
1024           cleanup_temporary_files(conf, pkg);
1025
1026           opkg_message(conf, OPKG_INFO,
1027                        "Failed.\n");
1028           if (use_signal)
1029                signal(SIGINT, old_handler);
1030           else
1031                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1032
1033           pkg_vec_free (replacees);
1034           return OPKG_ERR_UNKNOWN;
1035      }
1036      opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
1037 }
1038
1039 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1040 {
1041      /* DPKG_INCOMPATIBILITY:
1042         dpkg does some things here that we don't do yet. Do we care?
1043
1044         1. If a version of the package is already installed, call
1045            old-prerm upgrade new-version
1046         2. If the script runs but exits with a non-zero exit status
1047            new-prerm failed-upgrade old-version
1048            Error unwind, for both the above cases:
1049            old-postinst abort-upgrade new-version
1050      */
1051      return 0;
1052 }
1053
1054 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1055 {
1056      /* DPKG_INCOMPATIBILITY:
1057         dpkg does some things here that we don't do yet. Do we care?
1058         (See prerm_upgrade_old_package for details)
1059      */
1060      return 0;
1061 }
1062
1063 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1064 {
1065      /* DPKG_INCOMPATIBILITY:
1066         dpkg does some things here that we don't do yet. Do we care?
1067         2. If a 'conflicting' package is being removed at the same time:
1068                 1. If any packages depended on that conflicting package and
1069                    --auto-deconfigure is specified, call, for each such package:
1070                    deconfigured's-prerm deconfigure \
1071                    in-favour package-being-installed version \
1072                    removing conflicting-package version
1073                 Error unwind:
1074                    deconfigured's-postinst abort-deconfigure \
1075                    in-favour package-being-installed-but-failed version \
1076                    removing conflicting-package version
1077
1078                    The deconfigured packages are marked as requiring
1079                    configuration, so that if --install is used they will be
1080                    configured again if possible.
1081                 2. To prepare for removal of the conflicting package, call:
1082                    conflictor's-prerm remove in-favour package new-version
1083                 Error unwind:
1084                    conflictor's-postinst abort-remove in-favour package new-version
1085      */
1086      return 0;
1087 }
1088
1089 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1090 {
1091      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1092         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1093         details) */
1094      return 0;
1095 }
1096
1097 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1098 {
1099      int err;
1100      char *preinst_args;
1101
1102      if (old_pkg) {
1103           char *old_version = pkg_version_str_alloc(old_pkg);
1104           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1105           free(old_version);
1106      } else if (pkg->state_status == SS_CONFIG_FILES) {
1107           char *pkg_version = pkg_version_str_alloc(pkg);
1108           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1109           free(pkg_version);
1110      } else {
1111           preinst_args = strdup("install");
1112      }
1113
1114      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1115      if (err) {
1116           opkg_message(conf, OPKG_ERROR,
1117                        "Aborting installation of %s\n", pkg->name);
1118           return 1;
1119      }
1120
1121      free(preinst_args);
1122
1123      return 0;
1124 }
1125
1126 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1127 {
1128      /* DPKG_INCOMPATIBILITY:
1129         dpkg does the following error unwind, should we?
1130         pkg->postrm abort-upgrade old-version
1131         OR pkg->postrm abort-install old-version
1132         OR pkg->postrm abort-install
1133      */
1134      return 0;
1135 }
1136
1137 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1138 {
1139      int err;
1140      conffile_list_elt_t *iter;
1141      conffile_t *cf;
1142
1143      if (conf->noaction) return 0;
1144
1145      /* Backup all modified conffiles */
1146      if (old_pkg) {
1147           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1148                char *cf_name;
1149
1150                cf = iter->data;
1151                cf_name = root_filename_alloc(conf, cf->name);
1152
1153                /* Don't worry if the conffile is just plain gone */
1154                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1155                     err = backup_make_backup(conf, cf_name);
1156                     if (err) {
1157                          return err;
1158                     }
1159                }
1160                free(cf_name);
1161           }
1162      }
1163
1164      /* Backup all conffiles that were not conffiles in old_pkg */
1165      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1166           char *cf_name;
1167           cf = (conffile_t *)iter->data;
1168           cf_name = root_filename_alloc(conf, cf->name);
1169           /* Ignore if this was a conffile in old_pkg as well */
1170           if (pkg_get_conffile(old_pkg, cf->name)) {
1171                continue;
1172           }
1173
1174           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1175                err = backup_make_backup(conf, cf_name);
1176                if (err) {
1177                     return err;
1178                }
1179           }
1180           free(cf_name);
1181      }
1182
1183      return 0;
1184 }
1185
1186 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1187 {
1188      conffile_list_elt_t *iter;
1189
1190      if (old_pkg) {
1191           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1192                backup_remove(((nv_pair_t *)iter->data)->name);
1193           }
1194      }
1195
1196      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1197           backup_remove(((nv_pair_t *)iter->data)->name);
1198      }
1199
1200      return 0;
1201 }
1202
1203
1204 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1205 {
1206      /* DPKG_INCOMPATIBILITY:
1207         opkg takes a slightly different approach than dpkg at this
1208         point.  dpkg installs each file in the new package while
1209         creating a backup for any file that is replaced, (so that it
1210         can unwind if necessary).  To avoid complexity and redundant
1211         storage, opkg doesn't do any installation until later, (at the
1212         point at which dpkg removes the backups.
1213
1214         But, we do have to check for data file clashes, since after
1215         installing a package with a file clash, removing either of the
1216         packages involved in the clash has the potential to break the
1217         other package.
1218      */
1219      str_list_t *files_list;
1220      str_list_elt_t *iter;
1221
1222      int clashes = 0;
1223
1224      files_list = pkg_get_installed_files(pkg);
1225      for (iter = str_list_first(files_list); iter; iter = str_list_next(files_list, iter)) {
1226           char *root_filename;
1227           char *filename = (char *) iter->data;
1228           root_filename = root_filename_alloc(conf, filename);
1229           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1230                pkg_t *owner;
1231                pkg_t *obs;
1232                /* Pre-existing conffiles are OK */
1233                /* @@@@ should have way to check that it is a conffile -Jamey */
1234                if (backup_exists_for(root_filename)) {
1235                     continue;
1236                }
1237
1238                /* Pre-existing files are OK if force-overwrite was asserted. */
1239                if (conf->force_overwrite) {
1240                     /* but we need to change who owns this file */
1241                     file_hash_set_file_owner(conf, filename, pkg);
1242                     continue;
1243                }
1244
1245                owner = file_hash_get_file_owner(conf, filename);
1246
1247                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1248                if (owner && old_pkg) {
1249                     if (strcmp(owner->name, old_pkg->name) == 0) {
1250                          continue;
1251                     }
1252                }
1253
1254                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1255                if (owner) {
1256                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1257                     if (pkg_replaces(pkg, owner)) {
1258                          continue;
1259                     }
1260 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1261    then it's ok to overwrite. */
1262                     if (strcmp(owner->name,pkg->name)==0){
1263                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1264                          continue;
1265                     }
1266                }
1267
1268                /* Pre-existing files are OK if they are obsolete */
1269                obs = hash_table_get(&conf->obs_file_hash, filename);
1270                if (obs) {
1271                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1272                     continue;
1273                }
1274
1275                /* We have found a clash. */
1276                opkg_message(conf, OPKG_ERROR,
1277                             "Package %s wants to install file %s\n"
1278                             "\tBut that file is already provided by package ",
1279                             pkg->name, filename);
1280                if (owner) {
1281                     opkg_message(conf, OPKG_ERROR,
1282                                  "%s\n", owner->name);
1283                } else {
1284                     opkg_message(conf, OPKG_ERROR,
1285                                  "<no package>\nPlease move this file out of the way and try again.\n");
1286                }
1287                clashes++;
1288           }
1289           free(root_filename);
1290      }
1291      pkg_free_installed_files(pkg);
1292
1293      return clashes;
1294 }
1295
1296 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1297 {
1298     /* Basically that's the worst hack I could do to be able to change ownership of
1299        file list, but, being that we have no way to unwind the mods, due to structure
1300        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1301        What we do here is change the ownership of file in hash if a replace ( or similar events
1302        happens )
1303        Only the action that are needed to change name should be considered.
1304        @@@ To change after 1.0 release.
1305      */
1306      str_list_t *files_list;
1307      str_list_elt_t *iter;
1308
1309      char *root_filename = NULL;
1310
1311      int clashes = 0;
1312
1313      files_list = pkg_get_installed_files(pkg);
1314      for (iter = str_list_first(files_list); iter; iter = str_list_next(files_list, iter)) {
1315           char *filename = (char *) iter->data;
1316           if (root_filename) {
1317               free(root_filename);
1318               root_filename = NULL;
1319           }
1320           root_filename = root_filename_alloc(conf, filename);
1321           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1322                pkg_t *owner;
1323
1324                if (conf->force_overwrite) {
1325                     /* but we need to change who owns this file */
1326                     file_hash_set_file_owner(conf, filename, pkg);
1327                     continue;
1328                }
1329
1330                owner = file_hash_get_file_owner(conf, filename);
1331
1332                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1333                if (owner) {
1334                     if (pkg_replaces(pkg, owner)) {
1335 /* It's now time to change the owner of that file.
1336    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1337                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1338                          file_hash_set_file_owner(conf, filename, pkg);
1339                          continue;
1340                     }
1341                }
1342
1343           }
1344      }
1345      if (root_filename) {
1346          free(root_filename);
1347          root_filename = NULL;
1348      }
1349      pkg_free_installed_files(pkg);
1350
1351      return clashes;
1352 }
1353
1354 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1355 {
1356      /* Nothing to do since check_data_file_clashes doesn't change state */
1357      return 0;
1358 }
1359
1360 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1361 {
1362      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1363         1. If the package is being upgraded, call
1364            old-postrm upgrade new-version
1365         2. If this fails, attempt:
1366            new-postrm failed-upgrade old-version
1367         Error unwind, for both cases:
1368            old-preinst abort-upgrade new-version    */
1369      return 0;
1370 }
1371
1372 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1373 {
1374      /* DPKG_INCOMPATIBILITY:
1375         dpkg does some things here that we don't do yet. Do we care?
1376         (See postrm_upgrade_old_pkg for details)
1377      */
1378     return 0;
1379 }
1380
1381 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1382 {
1383      int err;
1384      str_list_t *old_files;
1385      str_list_elt_t *of;
1386      str_list_t *new_files;
1387      str_list_elt_t *nf;
1388      hash_table_t new_files_table;
1389
1390      if (old_pkg == NULL) {
1391           return 0;
1392      }
1393
1394      old_files = pkg_get_installed_files(old_pkg);
1395      new_files = pkg_get_installed_files(pkg);
1396
1397      new_files_table.entries = NULL;
1398      hash_table_init("new_files" , &new_files_table, 20);
1399      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1400          if (nf && nf->data)
1401             hash_table_insert(&new_files_table, nf->data, nf->data);
1402      }
1403
1404      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1405           pkg_t *owner;
1406           char *old, *new;
1407           old = (char *)of->data;
1408           new = (char *) hash_table_get (&new_files_table, old);
1409           if (new)
1410                continue;
1411
1412           if (file_is_dir(old)) {
1413                continue;
1414           }
1415           owner = file_hash_get_file_owner(conf, old);
1416           if (owner != old_pkg) {
1417                /* in case obsolete file no longer belongs to old_pkg */
1418                continue;
1419           }
1420
1421           /* old file is obsolete */
1422           opkg_message(conf, OPKG_INFO,
1423                        "    removing obsolete file %s\n", old);
1424           if (!conf->noaction) {
1425                err = unlink(old);
1426                if (err) {
1427                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1428                                  strerror(errno));
1429                }
1430           }
1431      }
1432
1433      hash_table_deinit(&new_files_table);
1434      pkg_free_installed_files(old_pkg);
1435      pkg_free_installed_files(pkg);
1436
1437      return 0;
1438 }
1439
1440 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1441 {
1442      int i;
1443      int err = 0;
1444      char *globpattern;
1445      glob_t globbuf;
1446      if (0) {
1447           if (!pkg->dest) {
1448                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1449                return -1;
1450           }
1451           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1452           err = glob(globpattern, 0, NULL, &globbuf);
1453           free(globpattern);
1454           if (err) {
1455                return err;
1456           }
1457           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1458           for (i = 0; i < globbuf.gl_pathc; i++) {
1459                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1460                             globbuf.gl_pathv[i], old_pkg->name);
1461                if (!conf->noaction)
1462                     unlink(globbuf.gl_pathv[i]);
1463           }
1464           globfree(&globbuf);
1465      }
1466      return err;
1467 }
1468
1469 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1470 {
1471      int ret;
1472      char *prefix;
1473
1474      if (old_pkg)
1475           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1476      sprintf_alloc(&prefix, "%s.", pkg->name);
1477      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1478                                                         pkg->dest->info_dir,
1479                                                         prefix);
1480      free(prefix);
1481      return ret;
1482 }
1483
1484 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1485 {
1486      /* DPKG_INCOMPATIBILITY:
1487         This is a fairly sophisticated dpkg operation. Shall we
1488         skip it? */
1489
1490      /* Any packages all of whose files have been overwritten during the
1491         installation, and which aren't required for dependencies, are
1492         considered to have been removed. For each such package
1493         1. disappearer's-postrm disappear overwriter overwriter-version
1494         2. The package's maintainer scripts are removed
1495         3. It is noted in the status database as being in a sane state,
1496            namely not installed (any conffiles it may have are ignored,
1497            rather than being removed by dpkg). Note that disappearing
1498            packages do not have their prerm called, because dpkg doesn't
1499            know in advance that the package is going to vanish.
1500      */
1501      return 0;
1502 }
1503
1504 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1505 {
1506      int err;
1507
1508      /* opkg takes a slightly different approach to data file backups
1509         than dpkg. Rather than removing backups at this point, we
1510         actually do the data file installation now. See comments in
1511         check_data_file_clashes() for more details. */
1512
1513      opkg_message(conf, OPKG_INFO,
1514                   "    extracting data files to %s\n", pkg->dest->root_dir);
1515      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1516      if (err) {
1517           return err;
1518      }
1519
1520      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1521         so we can't save ourself from removing important packages
1522         At this point we (should) have extracted the .control file, so it
1523         would be a good idea to reload the data in it, and set the Essential
1524         state in *pkg. From now on the Essential is back in status file and
1525         we can protect again.
1526         We should operate this way:
1527         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1528         check for "Essential" in it
1529         set the value in pkg->essential.
1530         This new routine could be useful also for every other flag
1531         Pigi: 16/03/2004 */
1532      set_flags_from_control(conf, pkg) ;
1533
1534      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1535      err = pkg_write_filelist(conf, pkg);
1536      if (err)
1537           return err;
1538
1539      /* XXX: FEATURE: opkg should identify any files which existed
1540         before installation and which were overwritten, (see
1541         check_data_file_clashes()). What it must do is remove any such
1542         files from the filelist of the old package which provided the
1543         file. Otherwise, if the old package were removed at some point
1544         it would break the new package. Removing the new package will
1545         also break the old one, but this cannot be helped since the old
1546         package's file has already been deleted. This is the importance
1547         of check_data_file_clashes(), and only allowing opkg to install
1548         a clashing package with a user force. */
1549
1550      return 0;
1551 }
1552
1553 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1554 {
1555      conffile_list_elt_t *iter;
1556      conffile_t *cf;
1557      char *cf_backup;
1558
1559     char *md5sum;
1560
1561
1562      if (conf->noaction) return 0;
1563
1564      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1565           char *root_filename;
1566           cf = (conffile_t *)iter->data;
1567           root_filename = root_filename_alloc(conf, cf->name);
1568
1569           /* Might need to initialize the md5sum for each conffile */
1570           if (cf->value == NULL) {
1571                cf->value = file_md5sum_alloc(root_filename);
1572           }
1573
1574           if (!file_exists(root_filename)) {
1575                free(root_filename);
1576                continue;
1577           }
1578
1579           cf_backup = backup_filename_alloc(root_filename);
1580
1581
1582           if (file_exists(cf_backup)) {
1583  /* Let's compute md5 to test if files are changed */
1584               md5sum = file_md5sum_alloc(cf_backup);
1585                if (strcmp( cf->value,md5sum) != 0 ) {
1586                   if (conf->force_defaults
1587                       || user_prefers_old_conffile(cf->name, cf_backup) ) {
1588                        rename(cf_backup, root_filename);
1589                   }
1590                }
1591                unlink(cf_backup);
1592                free(md5sum);
1593           }
1594
1595           free(cf_backup);
1596           free(root_filename);
1597      }
1598
1599      return 0;
1600 }
1601
1602 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1603 {
1604      char *response;
1605      const char *short_file_name;
1606
1607      short_file_name = strrchr(file_name, '/');
1608      if (short_file_name) {
1609           short_file_name++;
1610      } else {
1611           short_file_name = file_name;
1612      }
1613
1614      while (1) {
1615           response = get_user_response("    Configuration file '%s'\n"
1616                                        "    ==> File on system created by you or by a script.\n"
1617                                        "    ==> File also in package provided by package maintainer.\n"
1618                                        "       What would you like to do about it ?  Your options are:\n"
1619                                        "        Y or I  : install the package maintainer's version\n"
1620                                        "        N or O  : keep your currently-installed version\n"
1621                                        "          D     : show the differences between the versions (if diff is installed)\n"
1622                                        "     The default action is to keep your current version.\n"
1623                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1624           if (strcmp(response, "y") == 0
1625               || strcmp(response, "i") == 0
1626               || strcmp(response, "yes") == 0) {
1627                free(response);
1628                return 0;
1629           }
1630
1631           if (strcmp(response, "d") == 0) {
1632                char *cmd;
1633
1634                free(response);
1635                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1636                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1637                xsystem(cmd);
1638                free(cmd);
1639                printf("    [Press ENTER to continue]\n");
1640                response = file_read_line_alloc(stdin);
1641                free(response);
1642                continue;
1643           }
1644
1645           free(response);
1646           return 1;
1647      }
1648 }
1649
1650 /* XXX: CLEANUP: I'd like to move all of the code for
1651    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1652    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1653    pkg_deinit for example). */
1654 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1655 {
1656      DIR *tmp_dir;
1657      struct dirent *dirent;
1658      char *tmp_file;
1659
1660 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1661 #error
1662      opkg_message(conf, OPKG_DEBUG,
1663                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1664                   __FUNCTION__, pkg->tmp_unpack_dir);
1665      return 0;
1666 #endif
1667
1668      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1669           tmp_dir = opendir(pkg->tmp_unpack_dir);
1670           if (tmp_dir) {
1671                while (1) {
1672                     dirent = readdir(tmp_dir);
1673                     if (dirent == NULL) {
1674                          break;
1675                     }
1676                     sprintf_alloc(&tmp_file, "%s/%s",
1677                                   pkg->tmp_unpack_dir, dirent->d_name);
1678                     if (! file_is_dir(tmp_file)) {
1679                          unlink(tmp_file);
1680                     }
1681                     free(tmp_file);
1682                }
1683                closedir(tmp_dir);
1684                rmdir(pkg->tmp_unpack_dir);
1685                free(pkg->tmp_unpack_dir);
1686                pkg->tmp_unpack_dir = NULL;
1687           }
1688      }
1689
1690      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1691                   pkg->name, pkg->local_filename, conf->tmp_dir);
1692      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1693           unlink(pkg->local_filename);
1694           free(pkg->local_filename);
1695           pkg->local_filename = NULL;
1696      }
1697
1698      return 0;
1699 }
1700
1701 static char *backup_filename_alloc(const char *file_name)
1702 {
1703      char *backup;
1704
1705      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1706
1707      return backup;
1708 }
1709
1710 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1711 {
1712      int err;
1713      char *backup;
1714
1715      backup = backup_filename_alloc(file_name);
1716      err = file_copy(file_name, backup);
1717      if (err) {
1718           opkg_message(conf, OPKG_ERROR,
1719                        "%s: Failed to copy %s to %s\n",
1720                        __FUNCTION__, file_name, backup);
1721      }
1722
1723      free(backup);
1724
1725      return err;
1726 }
1727
1728 static int backup_exists_for(const char *file_name)
1729 {
1730      int ret;
1731      char *backup;
1732
1733      backup = backup_filename_alloc(file_name);
1734
1735      ret = file_exists(backup);
1736
1737      free(backup);
1738
1739      return ret;
1740 }
1741
1742 static int backup_remove(const char *file_name)
1743 {
1744      char *backup;
1745
1746      backup = backup_filename_alloc(file_name);
1747      unlink(backup);
1748      free(backup);
1749
1750      return 0;
1751 }
1752