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, *niter;
 436
 437      for (iter = str_list_first(new_list), niter = str_list_next(new_list, iter);
 438              iter;
 439              iter = niter, niter = str_list_next(new_list, niter)) {
 440           char *new_file = (char *)iter->data;
 441           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
 442           if (!new_file)
 443                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
 444           if (!owner || (owner == old_pkg))
 445                file_hash_set_file_owner(conf, new_file, new_pkg);
 446      }
 447      if (old_pkg) {
 448           str_list_t *old_list = pkg_get_installed_files(old_pkg);
 449           for (iter = str_list_first(old_list), niter = str_list_next(old_list, iter);
 450                   iter;
 451                   iter = niter, niter = str_list_next(old_list, niter)) {
 452                char *old_file = (char *)iter->data;
 453                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
 454                if (owner == old_pkg) {
 455                     /* obsolete */
 456                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
 457                }
 458           }
 459           pkg_free_installed_files(old_pkg);
 460      }
 461      pkg_free_installed_files(new_pkg);
 462      return 0;
 463 }
 464
 465 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
 466 {
 467     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
 468
 469     /* sma 6.20.02:  yup; here's the first bit */
 470     /*
 471      * XXX: BUG easy for cworth
 472      * 1) please point the call below to the correct current root destination
 473      * 2) we need to resolve how to check the required space for a pending pkg,
 474      *    my diddling with the .opk file size below isn't going to cut it.
 475      * 3) return a proper error code instead of 1
 476      */
 477      int comp_size, blocks_available;
 478      char *root_dir;
 479
 480      if (!conf->force_space && pkg->installed_size != NULL) {
 481           root_dir = pkg->dest ? pkg->dest->root_dir : conf->default_dest->root_dir;
 482           blocks_available = get_available_blocks(root_dir);
 483
 484           comp_size = strtoul(pkg->installed_size, NULL, 0);
 485           /* round up a blocks count without doing fancy-but-slow casting jazz */
 486           comp_size = (int)((comp_size + 1023) / 1024);
 487
 488           if (comp_size >= blocks_available) {
 489                opkg_message(conf, OPKG_ERROR,
 490                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n",
 491                             blocks_available, root_dir, pkg->name, comp_size);
 492                return ENOSPC;
 493           }
 494      }
 495      return 0;
 496 }
 497
 498 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
 499 {
 500      int err;
 501      char *conffiles_file_name;
 502      char *root_dir;
 503      FILE *conffiles_file;
 504
 505      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
 506
 507      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
 508      if (pkg->tmp_unpack_dir == NULL) {
 509           opkg_message(conf, OPKG_ERROR,
 510                        "%s: Failed to create temporary directory '%s': %s\n",
 511                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
 512           return errno;
 513      }
 514
 515      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
 516      if (err) {
 517           return err;
 518      }
 519
 520      /* XXX: CLEANUP: There might be a cleaner place to read in the
 521         conffiles. Seems like I should be able to get everything to go
 522         through pkg_init_from_file. If so, maybe it would make sense to
 523         move all of unpack_pkg_control_files to that function. */
 524
 525      /* Don't need to re-read conffiles if we already have it */
 526      if (!nv_pair_list_empty(&pkg->conffiles)) {
 527           return 0;
 528      }
 529
 530      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
 531      if (! file_exists(conffiles_file_name)) {
 532           free(conffiles_file_name);
 533           return 0;
 534      }
 535
 536      conffiles_file = fopen(conffiles_file_name, "r");
 537      if (conffiles_file == NULL) {
 538           fprintf(stderr, "%s: failed to open %s: %s\n",
 539                   __FUNCTION__, conffiles_file_name, strerror(errno));
 540           free(conffiles_file_name);
 541           return errno;
 542      }
 543      free(conffiles_file_name);
 544
 545      while (1) {
 546           char *cf_name;
 547           char *cf_name_in_dest;
 548
 549           cf_name = file_read_line_alloc(conffiles_file);
 550           if (cf_name == NULL) {
 551                break;
 552           }
 553           str_chomp(cf_name);
 554           if (cf_name[0] == '\0') {
 555                continue;
 556           }
 557
 558           /* Prepend dest->root_dir to conffile name.
 559              Take pains to avoid multiple slashes. */
 560           root_dir = pkg->dest->root_dir;
 561           if (conf->offline_root)
 562                /* skip the offline_root prefix */
 563                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
 564           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
 565                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
 566
 567           /* Can't get an md5sum now, (file isn't extracted yet).
 568              We'll wait until resolve_conffiles */
 569           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
 570
 571           free(cf_name);
 572           free(cf_name_in_dest);
 573      }
 574
 575      fclose(conffiles_file);
 576
 577      return 0;
 578 }
 579
 580 static int pkg_remove_orphan_dependent(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 581 {
 582     int i, j, found;
 583     char *buf, *d_str;
 584     pkg_t *p;
 585     if (!old_pkg)
 586         return 0;
 587     if (!pkg) {
 588         fprintf(stderr, "pkg shall not be NULL here.  please send to the bugzilla!! [%s %d]\n", __FILE__, __LINE__);
 589         return -1;
 590     }
 591     if (old_pkg->depends_count == 0)
 592         return 0;
 593     for (i=0;i<old_pkg->depends_count;i++) {
 594         found = 0;
 595         for (j=0;j<pkg->depends_count;j++) {
 596             if (!strcmp(old_pkg->depends_str[i], pkg->depends_str[j])) {
 597                 found = 1;
 598                 break;
 599             }
 600         }
 601         if (found)
 602             continue;
 603         d_str = old_pkg->depends_str[i];
 604         buf = calloc (1, strlen (d_str) + 1);
 605         j=0;
 606         while (d_str[j] != '\0' && d_str[j] != ' ') {
 607             buf[j]=d_str[j];
 608             ++j;
 609         }
 610         buf[j]='\0';
 611         buf = realloc (buf, strlen (buf) + 1);
 612         p = pkg_hash_fetch_installed_by_name (&conf->pkg_hash, buf);
 613         if (!p) {
 614             fprintf(stderr, "The pkg %s had been removed!!\n", buf);
 615             free(buf);
 616             continue;
 617         }
 618         if (p->auto_installed) {
 619             int deps;
 620             abstract_pkg_t **dependents;
 621             deps = pkg_has_installed_dependents(conf, NULL, p, &dependents);
 622             if (deps == 0) {
 623                 opkg_message (conf, OPKG_NOTICE,"%s was autoinstalled but is now orphaned, remove it.\n", buf);
 624                 opkg_remove_pkg(conf, p, 0);
 625             } else
 626                 opkg_message (conf, OPKG_INFO, "%s was autoinstalled and is still required by %d installed packages\n", buf, deps);
 627         }
 628         free(buf);
 629     }
 630     return 0;
 631 }
 632
 633 /* returns number of installed replacees */
 634 int pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
 635 {
 636      abstract_pkg_t **replaces = pkg->replaces;
 637      int replaces_count = pkg->replaces_count;
 638      int i, j;
 639      for (i = 0; i < replaces_count; i++) {
 640           abstract_pkg_t *ab_pkg = replaces[i];
 641           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 642           if (pkg_vec) {
 643                for (j = 0; j < pkg_vec->len; j++) {
 644                     pkg_t *replacee = pkg_vec->pkgs[j];
 645                     if (!pkg_conflicts(pkg, replacee))
 646                          continue;
 647                     if (replacee->state_status == SS_INSTALLED) {
 648                          pkg_vec_insert(installed_replacees, replacee);
 649                     }
 650                }
 651           }
 652      }
 653      return installed_replacees->len;
 654 }
 655
 656 int pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
 657 {
 658      int i;
 659      int replaces_count = replacees->len;
 660      for (i = 0; i < replaces_count; i++) {
 661           pkg_t *replacee = replacees->pkgs[i];
 662           int err;
 663           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
 664           err = opkg_remove_pkg(conf, replacee,0);
 665           if (err)
 666                return err;
 667      }
 668      return 0;
 669 }
 670
 671 /* to unwind the removal: make sure they are installed */
 672 int pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
 673 {
 674      int i, err;
 675      int replaces_count = replacees->len;
 676      for (i = 0; i < replaces_count; i++) {
 677           pkg_t *replacee = replacees->pkgs[i];
 678           if (replacee->state_status != SS_INSTALLED) {
 679                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 680                err = opkg_install_pkg(conf, replacee,0);
 681                if (err)
 682                     return err;
 683           }
 684      }
 685      return 0;
 686 }
 687
 688 int caught_sigint = 0;
 689 static void opkg_install_pkg_sigint_handler(int sig)
 690 {
 691      caught_sigint = sig;
 692 }
 693
 694 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
 695 static int opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
 696 {
 697      if (old_pkg) {
 698           char message_out[15];
 699           char *old_version = pkg_version_str_alloc(old_pkg);
 700           char *new_version = pkg_version_str_alloc(pkg);
 701           int cmp = pkg_compare_versions(old_pkg, pkg);
 702           int rc = 0;
 703
 704           memset(message_out,'\x0',15);
 705           strncpy (message_out,"Upgrading ",strlen("Upgrading "));
 706           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 707              cmp = -1 ;                                       /* then we force opkg to downgrade */
 708              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
 709                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 710           }
 711
 712           if (cmp > 0) {
 713                opkg_message(conf, OPKG_NOTICE,
 714                             "Not downgrading package %s on %s from %s to %s.\n",
 715                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
 716                rc = 1;
 717           } else if (cmp < 0) {
 718                opkg_message(conf, OPKG_NOTICE,
 719                             "%s%s on %s from %s to %s...\n",
 720                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
 721                pkg->dest = old_pkg->dest;
 722                rc = 0;
 723           } else /* cmp == 0 */ {
 724                if (conf->force_reinstall) {
 725                     opkg_message(conf, OPKG_NOTICE,
 726                                  "Reinstalling %s (%s) on %s...\n",
 727                                  pkg->name, new_version, old_pkg->dest->name);
 728                     pkg->dest = old_pkg->dest;
 729                     rc = 0;
 730                } else {
 731                     opkg_message(conf, OPKG_NOTICE,
 732                                  "Not installing %s (%s) on %s -- already installed.\n",
 733                                  pkg->name, new_version, old_pkg->dest->name);
 734                     rc = 1;
 735                }
 736           }
 737           free(old_version);
 738           free(new_version);
 739           return rc;
 740      } else {
 741       char message_out[15] ;
 742       memset(message_out,'\x0',15);
 743       if ( message )
 744           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
 745       else
 746           strncpy( message_out,"Installing ",strlen("Installing ") );
 747           char *version = pkg_version_str_alloc(pkg);
 748
 749           opkg_message(conf, OPKG_NOTICE,
 750                        "%s%s (%s) to %s...\n", message_out,
 751                        pkg->name, version, pkg->dest->name);
 752           free(version);
 753           return 0;
 754      }
 755 }
 756
 757 /**
 758  *  @brief Really install a pkg_t
 759  */
 760 int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
 761 {
 762      int err = 0;
 763      int message = 0;
 764      pkg_t *old_pkg = NULL;
 765      pkg_vec_t *replacees;
 766      abstract_pkg_t *ab_pkg = NULL;
 767      int old_state_flag;
 768      char* file_md5;
 769 #ifdef HAVE_SHA256
 770      char* file_sha256;
 771 #endif
 772      char *pkgid;
 773
 774      if ( from_upgrade )
 775         message = 1;            /* Coming from an upgrade, and should change the output message */
 776
 777      if (!pkg) {
 778           opkg_message(conf, OPKG_ERROR,
 779                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
 780           return OPKG_INSTALL_ERR_INTERNAL;
 781      }
 782
 783      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
 784
 785      if (!pkg_arch_supported(conf, pkg)) {
 786           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
 787                        pkg->architecture, pkg->name);
 788           return OPKG_INSTALL_ERR_INTERNAL;
 789      }
 790      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
 791           err = satisfy_dependencies_for(conf, pkg);
 792           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 793
 794           opkg_message(conf, OPKG_NOTICE,
 795                        "Package %s is already installed in %s.\n",
 796                        pkg->name, pkg->dest->name);
 797           return 0;
 798      }
 799
 800      if (pkg->dest == NULL) {
 801           pkg->dest = conf->default_dest;
 802      }
 803
 804      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 805
 806      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
 807      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
 808
 809      pkg->state_want = SW_INSTALL;
 810      if (old_pkg){
 811          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
 812      }
 813
 814
 815      /* Abhaya: conflicts check */
 816      err = check_conflicts_for(conf, pkg);
 817      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
 818
 819      /* this setup is to remove the upgrade scenario in the end when
 820         installing pkg A, A deps B & B deps on A. So both B and A are
 821         installed. Then A's installation is started resulting in an
 822         uncecessary upgrade */
 823      if (pkg->state_status == SS_INSTALLED
 824          && conf->force_reinstall == 0) return 0;
 825
 826      err = verify_pkg_installable(conf, pkg);
 827      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
 828
 829      if (pkg->local_filename == NULL) {
 830           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
 831           if (err) {
 832                opkg_message(conf, OPKG_ERROR,
 833                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
 834                             pkg->name);
 835                return OPKG_INSTALL_ERR_DOWNLOAD;
 836           }
 837      }
 838
 839      /* check that the repository is valid */
 840      #if HAVE_GPGME
 841      char *list_file_name, *sig_file_name, *lists_dir;
 842
 843      /* check to ensure the package has come from a repository */
 844      if (conf->check_signature && pkg->src)
 845      {
 846        sprintf_alloc (&lists_dir, "%s",
 847                      (conf->restrict_to_default_dest)
 848                       ? conf->default_dest->lists_dir
 849                       : conf->lists_dir);
 850        sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
 851        sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
 852
 853        if (file_exists (sig_file_name))
 854        {
 855          if (opkg_verify_file (conf, list_file_name, sig_file_name))
 856            return OPKG_INSTALL_ERR_SIGNATURE;
 857        }
 858
 859        free (lists_dir);
 860        free (list_file_name);
 861        free (sig_file_name);
 862      }
 863      #endif
 864
 865      /* Check for md5 values */
 866      if (pkg->md5sum)
 867      {
 868          file_md5 = file_md5sum_alloc(pkg->local_filename);
 869          if (strcmp(file_md5, pkg->md5sum))
 870          {
 871               opkg_message(conf, OPKG_ERROR,
 872                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 873                            pkg->name);
 874               free(file_md5);
 875               return OPKG_INSTALL_ERR_MD5;
 876          }
 877          free(file_md5);
 878      }
 879
 880 #ifdef HAVE_SHA256
 881      /* Check for sha256 value */
 882      if(pkg->sha256sum)
 883      {
 884          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
 885          if (strcmp(file_sha256, pkg->sha256sum))
 886          {
 887               opkg_message(conf, OPKG_ERROR,
 888                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 889                            pkg->name);
 890               free(file_sha256);
 891               return OPKG_INSTALL_ERR_SHA256;
 892          }
 893      }
 894 #endif
 895
 896      if (pkg->tmp_unpack_dir == NULL) {
 897           unpack_pkg_control_files(conf, pkg);
 898      }
 899
 900      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 901 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 902 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 903      err = update_file_ownership(conf, pkg, old_pkg);
 904      if (err) { return OPKG_ERR_UNKNOWN; }
 905
 906      if (conf->nodeps == 0) {
 907           err = satisfy_dependencies_for(conf, pkg);
 908           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 909      }
 910
 911      replacees = pkg_vec_alloc();
 912      pkg_get_installed_replacees(conf, pkg, replacees);
 913
 914      sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 915      opkg_set_current_state (conf, OPKG_STATE_INSTALLING_PKG, pkgid);
 916      free (pkgid);
 917
 918      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 919      {
 920           sigset_t newset, oldset;
 921           sighandler_t old_handler = NULL;
 922           int use_signal = 0;
 923           caught_sigint = 0;
 924           if (use_signal) {
 925                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 926           } else {
 927                sigemptyset(&newset);
 928                sigaddset(&newset, SIGINT);
 929                sigprocmask(SIG_BLOCK, &newset, &oldset);
 930           }
 931
 932           opkg_state_changed++;
 933           pkg->state_flag |= SF_FILELIST_CHANGED;
 934
 935           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
 936
 937           /* XXX: BUG: we really should treat replacement more like an upgrade
 938            *      Instead, we're going to remove the replacees
 939            */
 940           err = pkg_remove_installed_replacees(conf, replacees);
 941           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 942
 943           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 944           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 945
 946           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 947           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 948
 949           err = preinst_configure(conf, pkg, old_pkg);
 950           if (err) goto UNWIND_PREINST_CONFIGURE;
 951
 952           err = backup_modified_conffiles(conf, pkg, old_pkg);
 953           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 954
 955           err = check_data_file_clashes(conf, pkg, old_pkg);
 956           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 957
 958           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 959           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 960
 961           if (conf->noaction) return 0;
 962
 963           /* point of no return: no unwinding after this */
 964           if (old_pkg && !conf->force_reinstall) {
 965                old_pkg->state_want = SW_DEINSTALL;
 966
 967                if (old_pkg->state_flag & SF_NOPRUNE) {
 968                     opkg_message(conf, OPKG_INFO,
 969                                  "  not removing obsolesced files because package marked noprune\n");
 970                } else {
 971                     opkg_message(conf, OPKG_INFO,
 972                                  "  removing obsolesced files\n");
 973                     remove_obsolesced_files(conf, pkg, old_pkg);
 974                }
 975                /* removing files from old package, to avoid ghost files */
 976                remove_data_files_and_list(conf, old_pkg);
 977 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 978                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 979                remove_postrm(conf, old_pkg);
 980 /* Pigi */
 981
 982           }
 983
 984
 985           opkg_message(conf, OPKG_INFO,
 986                        "  installing maintainer scripts\n");
 987           install_maintainer_scripts(conf, pkg, old_pkg);
 988
 989           /* the following just returns 0 */
 990           remove_disappeared(conf, pkg);
 991
 992           opkg_message(conf, OPKG_INFO,
 993                        "  installing data files\n");
 994           install_data_files(conf, pkg);
 995
 996 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
 997           err = check_data_file_clashes_change(conf, pkg, old_pkg);
 998
 999           opkg_message(conf, OPKG_INFO,
1000                        "  resolving conf files\n");
1001           resolve_conffiles(conf, pkg);
1002
1003           pkg->state_status = SS_UNPACKED;
1004           old_state_flag = pkg->state_flag;
1005           pkg->state_flag &= ~SF_PREFER;
1006           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1007
1008           if (old_pkg && !conf->force_reinstall) {
1009                old_pkg->state_status = SS_NOT_INSTALLED;
1010           }
1011
1012           time(&pkg->installed_time);
1013
1014           opkg_message(conf, OPKG_INFO,
1015                        "  cleanup temp files\n");
1016           cleanup_temporary_files(conf, pkg);
1017
1018           ab_pkg = pkg->parent;
1019           if (ab_pkg)
1020                ab_pkg->state_status = pkg->state_status;
1021
1022           opkg_message(conf, OPKG_INFO, "Done.\n");
1023
1024           if (use_signal)
1025                signal(SIGINT, old_handler);
1026           else
1027                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1028           pkg_vec_free (replacees);
1029           return 0;
1030
1031
1032      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1033           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1034      UNWIND_CHECK_DATA_FILE_CLASHES:
1035           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1036      UNWIND_BACKUP_MODIFIED_CONFFILES:
1037           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1038      UNWIND_PREINST_CONFIGURE:
1039           preinst_configure_unwind(conf, pkg, old_pkg);
1040      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1041           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1042      UNWIND_PRERM_UPGRADE_OLD_PKG:
1043           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1044      UNWIND_REMOVE_INSTALLED_REPLACEES:
1045           pkg_remove_installed_replacees_unwind(conf, replacees);
1046
1047           opkg_message(conf, OPKG_INFO,
1048                        "  cleanup temp files\n");
1049           cleanup_temporary_files(conf, pkg);
1050
1051           opkg_message(conf, OPKG_INFO,
1052                        "Failed.\n");
1053           if (use_signal)
1054                signal(SIGINT, old_handler);
1055           else
1056                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1057
1058           pkg_vec_free (replacees);
1059           return OPKG_ERR_UNKNOWN;
1060      }
1061      opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
1062 }
1063
1064 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1065 {
1066      /* DPKG_INCOMPATIBILITY:
1067         dpkg does some things here that we don't do yet. Do we care?
1068
1069         1. If a version of the package is already installed, call
1070            old-prerm upgrade new-version
1071         2. If the script runs but exits with a non-zero exit status
1072            new-prerm failed-upgrade old-version
1073            Error unwind, for both the above cases:
1074            old-postinst abort-upgrade new-version
1075      */
1076      return 0;
1077 }
1078
1079 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1080 {
1081      /* DPKG_INCOMPATIBILITY:
1082         dpkg does some things here that we don't do yet. Do we care?
1083         (See prerm_upgrade_old_package for details)
1084      */
1085      return 0;
1086 }
1087
1088 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1089 {
1090      /* DPKG_INCOMPATIBILITY:
1091         dpkg does some things here that we don't do yet. Do we care?
1092         2. If a 'conflicting' package is being removed at the same time:
1093                 1. If any packages depended on that conflicting package and
1094                    --auto-deconfigure is specified, call, for each such package:
1095                    deconfigured's-prerm deconfigure \
1096                    in-favour package-being-installed version \
1097                    removing conflicting-package version
1098                 Error unwind:
1099                    deconfigured's-postinst abort-deconfigure \
1100                    in-favour package-being-installed-but-failed version \
1101                    removing conflicting-package version
1102
1103                    The deconfigured packages are marked as requiring
1104                    configuration, so that if --install is used they will be
1105                    configured again if possible.
1106                 2. To prepare for removal of the conflicting package, call:
1107                    conflictor's-prerm remove in-favour package new-version
1108                 Error unwind:
1109                    conflictor's-postinst abort-remove in-favour package new-version
1110      */
1111      return 0;
1112 }
1113
1114 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1115 {
1116      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1117         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1118         details) */
1119      return 0;
1120 }
1121
1122 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1123 {
1124      int err;
1125      char *preinst_args;
1126
1127      if (old_pkg) {
1128           char *old_version = pkg_version_str_alloc(old_pkg);
1129           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1130           free(old_version);
1131      } else if (pkg->state_status == SS_CONFIG_FILES) {
1132           char *pkg_version = pkg_version_str_alloc(pkg);
1133           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1134           free(pkg_version);
1135      } else {
1136           preinst_args = strdup("install");
1137      }
1138
1139      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1140      if (err) {
1141           opkg_message(conf, OPKG_ERROR,
1142                        "Aborting installation of %s\n", pkg->name);
1143           return 1;
1144      }
1145
1146      free(preinst_args);
1147
1148      return 0;
1149 }
1150
1151 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1152 {
1153      /* DPKG_INCOMPATIBILITY:
1154         dpkg does the following error unwind, should we?
1155         pkg->postrm abort-upgrade old-version
1156         OR pkg->postrm abort-install old-version
1157         OR pkg->postrm abort-install
1158      */
1159      return 0;
1160 }
1161
1162 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1163 {
1164      int err;
1165      conffile_list_elt_t *iter;
1166      conffile_t *cf;
1167
1168      if (conf->noaction) return 0;
1169
1170      /* Backup all modified conffiles */
1171      if (old_pkg) {
1172           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1173                char *cf_name;
1174
1175                cf = iter->data;
1176                cf_name = root_filename_alloc(conf, cf->name);
1177
1178                /* Don't worry if the conffile is just plain gone */
1179                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1180                     err = backup_make_backup(conf, cf_name);
1181                     if (err) {
1182                          return err;
1183                     }
1184                }
1185                free(cf_name);
1186           }
1187      }
1188
1189      /* Backup all conffiles that were not conffiles in old_pkg */
1190      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1191           char *cf_name;
1192           cf = (conffile_t *)iter->data;
1193           cf_name = root_filename_alloc(conf, cf->name);
1194           /* Ignore if this was a conffile in old_pkg as well */
1195           if (pkg_get_conffile(old_pkg, cf->name)) {
1196                continue;
1197           }
1198
1199           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1200                err = backup_make_backup(conf, cf_name);
1201                if (err) {
1202                     return err;
1203                }
1204           }
1205           free(cf_name);
1206      }
1207
1208      return 0;
1209 }
1210
1211 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1212 {
1213      conffile_list_elt_t *iter;
1214
1215      if (old_pkg) {
1216           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1217                backup_remove(((nv_pair_t *)iter->data)->name);
1218           }
1219      }
1220
1221      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1222           backup_remove(((nv_pair_t *)iter->data)->name);
1223      }
1224
1225      return 0;
1226 }
1227
1228
1229 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1230 {
1231      /* DPKG_INCOMPATIBILITY:
1232         opkg takes a slightly different approach than dpkg at this
1233         point.  dpkg installs each file in the new package while
1234         creating a backup for any file that is replaced, (so that it
1235         can unwind if necessary).  To avoid complexity and redundant
1236         storage, opkg doesn't do any installation until later, (at the
1237         point at which dpkg removes the backups.
1238
1239         But, we do have to check for data file clashes, since after
1240         installing a package with a file clash, removing either of the
1241         packages involved in the clash has the potential to break the
1242         other package.
1243      */
1244      str_list_t *files_list;
1245      str_list_elt_t *iter, *niter;
1246
1247      int clashes = 0;
1248
1249      files_list = pkg_get_installed_files(pkg);
1250      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1251              iter;
1252              iter = niter, niter = str_list_next(files_list, iter)) {
1253           char *root_filename;
1254           char *filename = (char *) iter->data;
1255           root_filename = root_filename_alloc(conf, filename);
1256           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1257                pkg_t *owner;
1258                pkg_t *obs;
1259                /* Pre-existing conffiles are OK */
1260                /* @@@@ should have way to check that it is a conffile -Jamey */
1261                if (backup_exists_for(root_filename)) {
1262                     continue;
1263                }
1264
1265                /* Pre-existing files are OK if force-overwrite was asserted. */
1266                if (conf->force_overwrite) {
1267                     /* but we need to change who owns this file */
1268                     file_hash_set_file_owner(conf, filename, pkg);
1269                     continue;
1270                }
1271
1272                owner = file_hash_get_file_owner(conf, filename);
1273
1274                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1275                if (owner && old_pkg) {
1276                     if (strcmp(owner->name, old_pkg->name) == 0) {
1277                          continue;
1278                     }
1279                }
1280
1281                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1282                if (owner) {
1283                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1284                     if (pkg_replaces(pkg, owner)) {
1285                          continue;
1286                     }
1287 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1288    then it's ok to overwrite. */
1289                     if (strcmp(owner->name,pkg->name)==0){
1290                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1291                          continue;
1292                     }
1293                }
1294
1295                /* Pre-existing files are OK if they are obsolete */
1296                obs = hash_table_get(&conf->obs_file_hash, filename);
1297                if (obs) {
1298                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1299                     continue;
1300                }
1301
1302                /* We have found a clash. */
1303                opkg_message(conf, OPKG_ERROR,
1304                             "Package %s wants to install file %s\n"
1305                             "\tBut that file is already provided by package ",
1306                             pkg->name, filename);
1307                if (owner) {
1308                     opkg_message(conf, OPKG_ERROR,
1309                                  "%s\n", owner->name);
1310                } else {
1311                     opkg_message(conf, OPKG_ERROR,
1312                                  "<no package>\nPlease move this file out of the way and try again.\n");
1313                }
1314                clashes++;
1315           }
1316           free(root_filename);
1317      }
1318      pkg_free_installed_files(pkg);
1319
1320      return clashes;
1321 }
1322
1323 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1324 {
1325     /* Basically that's the worst hack I could do to be able to change ownership of
1326        file list, but, being that we have no way to unwind the mods, due to structure
1327        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1328        What we do here is change the ownership of file in hash if a replace ( or similar events
1329        happens )
1330        Only the action that are needed to change name should be considered.
1331        @@@ To change after 1.0 release.
1332      */
1333      str_list_t *files_list;
1334      str_list_elt_t *iter, *niter;
1335
1336      char *root_filename = NULL;
1337
1338      int clashes = 0;
1339
1340      files_list = pkg_get_installed_files(pkg);
1341      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1342              iter;
1343              iter = niter, niter = str_list_next(files_list, niter)) {
1344           char *filename = (char *) iter->data;
1345           if (root_filename) {
1346               free(root_filename);
1347               root_filename = NULL;
1348           }
1349           root_filename = root_filename_alloc(conf, filename);
1350           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1351                pkg_t *owner;
1352
1353                owner = file_hash_get_file_owner(conf, filename);
1354
1355                if (conf->force_overwrite) {
1356                     /* but we need to change who owns this file */
1357                     file_hash_set_file_owner(conf, filename, pkg);
1358                     continue;
1359                }
1360
1361
1362                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1363                if (owner) {
1364                     if (pkg_replaces(pkg, owner)) {
1365 /* It's now time to change the owner of that file.
1366    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1367                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1368                          file_hash_set_file_owner(conf, filename, pkg);
1369                          continue;
1370                     }
1371                }
1372
1373           }
1374      }
1375      if (root_filename) {
1376          free(root_filename);
1377          root_filename = NULL;
1378      }
1379      pkg_free_installed_files(pkg);
1380
1381      return clashes;
1382 }
1383
1384 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1385 {
1386      /* Nothing to do since check_data_file_clashes doesn't change state */
1387      return 0;
1388 }
1389
1390 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1391 {
1392      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1393         1. If the package is being upgraded, call
1394            old-postrm upgrade new-version
1395         2. If this fails, attempt:
1396            new-postrm failed-upgrade old-version
1397         Error unwind, for both cases:
1398            old-preinst abort-upgrade new-version    */
1399      return 0;
1400 }
1401
1402 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1403 {
1404      /* DPKG_INCOMPATIBILITY:
1405         dpkg does some things here that we don't do yet. Do we care?
1406         (See postrm_upgrade_old_pkg for details)
1407      */
1408     return 0;
1409 }
1410
1411 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1412 {
1413      int err;
1414      str_list_t *old_files;
1415      str_list_elt_t *of;
1416      str_list_t *new_files;
1417      str_list_elt_t *nf;
1418      hash_table_t new_files_table;
1419
1420      if (old_pkg == NULL) {
1421           return 0;
1422      }
1423
1424      old_files = pkg_get_installed_files(old_pkg);
1425      new_files = pkg_get_installed_files(pkg);
1426
1427      new_files_table.entries = NULL;
1428      hash_table_init("new_files" , &new_files_table, 20);
1429      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1430          if (nf && nf->data)
1431             hash_table_insert(&new_files_table, nf->data, nf->data);
1432      }
1433
1434      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1435           pkg_t *owner;
1436           char *old, *new;
1437           old = (char *)of->data;
1438           new = (char *) hash_table_get (&new_files_table, old);
1439           if (new)
1440                continue;
1441
1442           if (file_is_dir(old)) {
1443                continue;
1444           }
1445           owner = file_hash_get_file_owner(conf, old);
1446           if (owner != old_pkg) {
1447                /* in case obsolete file no longer belongs to old_pkg */
1448                continue;
1449           }
1450
1451           /* old file is obsolete */
1452           opkg_message(conf, OPKG_INFO,
1453                        "    removing obsolete file %s\n", old);
1454           if (!conf->noaction) {
1455                err = unlink(old);
1456                if (err) {
1457                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1458                                  strerror(errno));
1459                }
1460           }
1461      }
1462
1463      hash_table_deinit(&new_files_table);
1464      pkg_free_installed_files(old_pkg);
1465      pkg_free_installed_files(pkg);
1466
1467      return 0;
1468 }
1469
1470 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1471 {
1472      int i;
1473      int err = 0;
1474      char *globpattern;
1475      glob_t globbuf;
1476      if (0) {
1477           if (!pkg->dest) {
1478                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1479                return -1;
1480           }
1481           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1482           err = glob(globpattern, 0, NULL, &globbuf);
1483           free(globpattern);
1484           if (err) {
1485                return err;
1486           }
1487           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1488           for (i = 0; i < globbuf.gl_pathc; i++) {
1489                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1490                             globbuf.gl_pathv[i], old_pkg->name);
1491                if (!conf->noaction)
1492                     unlink(globbuf.gl_pathv[i]);
1493           }
1494           globfree(&globbuf);
1495      }
1496      return err;
1497 }
1498
1499 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1500 {
1501      int ret;
1502      char *prefix;
1503
1504      if (old_pkg)
1505           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1506      sprintf_alloc(&prefix, "%s.", pkg->name);
1507      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1508                                                         pkg->dest->info_dir,
1509                                                         prefix);
1510      free(prefix);
1511      return ret;
1512 }
1513
1514 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1515 {
1516      /* DPKG_INCOMPATIBILITY:
1517         This is a fairly sophisticated dpkg operation. Shall we
1518         skip it? */
1519
1520      /* Any packages all of whose files have been overwritten during the
1521         installation, and which aren't required for dependencies, are
1522         considered to have been removed. For each such package
1523         1. disappearer's-postrm disappear overwriter overwriter-version
1524         2. The package's maintainer scripts are removed
1525         3. It is noted in the status database as being in a sane state,
1526            namely not installed (any conffiles it may have are ignored,
1527            rather than being removed by dpkg). Note that disappearing
1528            packages do not have their prerm called, because dpkg doesn't
1529            know in advance that the package is going to vanish.
1530      */
1531      return 0;
1532 }
1533
1534 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1535 {
1536      int err;
1537
1538      /* opkg takes a slightly different approach to data file backups
1539         than dpkg. Rather than removing backups at this point, we
1540         actually do the data file installation now. See comments in
1541         check_data_file_clashes() for more details. */
1542
1543      opkg_message(conf, OPKG_INFO,
1544                   "    extracting data files to %s\n", pkg->dest->root_dir);
1545      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1546      if (err) {
1547           return err;
1548      }
1549
1550      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1551         so we can't save ourself from removing important packages
1552         At this point we (should) have extracted the .control file, so it
1553         would be a good idea to reload the data in it, and set the Essential
1554         state in *pkg. From now on the Essential is back in status file and
1555         we can protect again.
1556         We should operate this way:
1557         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1558         check for "Essential" in it
1559         set the value in pkg->essential.
1560         This new routine could be useful also for every other flag
1561         Pigi: 16/03/2004 */
1562      set_flags_from_control(conf, pkg) ;
1563
1564      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1565      err = pkg_write_filelist(conf, pkg);
1566      if (err)
1567           return err;
1568
1569      /* XXX: FEATURE: opkg should identify any files which existed
1570         before installation and which were overwritten, (see
1571         check_data_file_clashes()). What it must do is remove any such
1572         files from the filelist of the old package which provided the
1573         file. Otherwise, if the old package were removed at some point
1574         it would break the new package. Removing the new package will
1575         also break the old one, but this cannot be helped since the old
1576         package's file has already been deleted. This is the importance
1577         of check_data_file_clashes(), and only allowing opkg to install
1578         a clashing package with a user force. */
1579
1580      return 0;
1581 }
1582
1583 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1584 {
1585      conffile_list_elt_t *iter;
1586      conffile_t *cf;
1587      char *cf_backup;
1588
1589     char *md5sum;
1590
1591
1592      if (conf->noaction) return 0;
1593
1594      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1595           char *root_filename;
1596           cf = (conffile_t *)iter->data;
1597           root_filename = root_filename_alloc(conf, cf->name);
1598
1599           /* Might need to initialize the md5sum for each conffile */
1600           if (cf->value == NULL) {
1601                cf->value = file_md5sum_alloc(root_filename);
1602           }
1603
1604           if (!file_exists(root_filename)) {
1605                free(root_filename);
1606                continue;
1607           }
1608
1609           cf_backup = backup_filename_alloc(root_filename);
1610
1611
1612           if (file_exists(cf_backup)) {
1613               /* Let's compute md5 to test if files are changed */
1614               md5sum = file_md5sum_alloc(cf_backup);
1615               if (strcmp( cf->value,md5sum) != 0 ) {
1616                   if (conf->force_maintainer) {
1617                       opkg_message(conf, OPKG_NOTICE, "Conffile %s using maintainer's setting.\n", cf_backup);
1618                   } else if (conf->force_defaults
1619                           || user_prefers_old_conffile(cf->name, cf_backup) ) {
1620                       rename(cf_backup, root_filename);
1621                   }
1622               }
1623               unlink(cf_backup);
1624               free(md5sum);
1625           }
1626
1627           free(cf_backup);
1628           free(root_filename);
1629      }
1630
1631      return 0;
1632 }
1633
1634 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1635 {
1636      char *response;
1637      const char *short_file_name;
1638
1639      short_file_name = strrchr(file_name, '/');
1640      if (short_file_name) {
1641           short_file_name++;
1642      } else {
1643           short_file_name = file_name;
1644      }
1645
1646      while (1) {
1647           response = get_user_response("    Configuration file '%s'\n"
1648                                        "    ==> File on system created by you or by a script.\n"
1649                                        "    ==> File also in package provided by package maintainer.\n"
1650                                        "       What would you like to do about it ?  Your options are:\n"
1651                                        "        Y or I  : install the package maintainer's version\n"
1652                                        "        N or O  : keep your currently-installed version\n"
1653                                        "          D     : show the differences between the versions (if diff is installed)\n"
1654                                        "     The default action is to keep your current version.\n"
1655                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1656           if (strcmp(response, "y") == 0
1657               || strcmp(response, "i") == 0
1658               || strcmp(response, "yes") == 0) {
1659                free(response);
1660                return 0;
1661           }
1662
1663           if (strcmp(response, "d") == 0) {
1664                char *cmd;
1665
1666                free(response);
1667                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1668                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1669                xsystem(cmd);
1670                free(cmd);
1671                printf("    [Press ENTER to continue]\n");
1672                response = file_read_line_alloc(stdin);
1673                free(response);
1674                continue;
1675           }
1676
1677           free(response);
1678           return 1;
1679      }
1680 }
1681
1682 /* XXX: CLEANUP: I'd like to move all of the code for
1683    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1684    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1685    pkg_deinit for example). */
1686 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1687 {
1688      DIR *tmp_dir;
1689      struct dirent *dirent;
1690      char *tmp_file;
1691
1692 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1693 #error
1694      opkg_message(conf, OPKG_DEBUG,
1695                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1696                   __FUNCTION__, pkg->tmp_unpack_dir);
1697      return 0;
1698 #endif
1699
1700      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1701           tmp_dir = opendir(pkg->tmp_unpack_dir);
1702           if (tmp_dir) {
1703                while (1) {
1704                     dirent = readdir(tmp_dir);
1705                     if (dirent == NULL) {
1706                          break;
1707                     }
1708                     sprintf_alloc(&tmp_file, "%s/%s",
1709                                   pkg->tmp_unpack_dir, dirent->d_name);
1710                     if (! file_is_dir(tmp_file)) {
1711                          unlink(tmp_file);
1712                     }
1713                     free(tmp_file);
1714                }
1715                closedir(tmp_dir);
1716                rmdir(pkg->tmp_unpack_dir);
1717                free(pkg->tmp_unpack_dir);
1718                pkg->tmp_unpack_dir = NULL;
1719           }
1720      }
1721
1722      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1723                   pkg->name, pkg->local_filename, conf->tmp_dir);
1724      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1725           unlink(pkg->local_filename);
1726           free(pkg->local_filename);
1727           pkg->local_filename = NULL;
1728      }
1729
1730      return 0;
1731 }
1732
1733 static char *backup_filename_alloc(const char *file_name)
1734 {
1735      char *backup;
1736
1737      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1738
1739      return backup;
1740 }
1741
1742 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1743 {
1744      int err;
1745      char *backup;
1746
1747      backup = backup_filename_alloc(file_name);
1748      err = file_copy(file_name, backup);
1749      if (err) {
1750           opkg_message(conf, OPKG_ERROR,
1751                        "%s: Failed to copy %s to %s\n",
1752                        __FUNCTION__, file_name, backup);
1753      }
1754
1755      free(backup);
1756
1757      return err;
1758 }
1759
1760 static int backup_exists_for(const char *file_name)
1761 {
1762      int ret;
1763      char *backup;
1764
1765      backup = backup_filename_alloc(file_name);
1766
1767      ret = file_exists(backup);
1768
1769      free(backup);
1770
1771      return ret;
1772 }
1773
1774 static int backup_remove(const char *file_name)
1775 {
1776      char *backup;
1777
1778      backup = backup_filename_alloc(file_name);
1779      unlink(backup);
1780      free(backup);
1781
1782      return 0;
1783 }
1784