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 defined(HAVE_GPGME) || defined(HAVE_OPENSSL)
 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            opkg_message(conf, OPKG_ERROR, "Failed to verify the signature of: %s\n",
 857                            list_file_name);
 858            return OPKG_INSTALL_ERR_SIGNATURE;
 859          }
 860        }else{
 861          opkg_message(conf, OPKG_ERROR, "Signature file is missing. "
 862                          "Perhaps you need to run 'opkg update'?\n");
 863          return OPKG_INSTALL_ERR_SIGNATURE;
 864        }
 865
 866        free (lists_dir);
 867        free (list_file_name);
 868        free (sig_file_name);
 869      }
 870      #endif
 871
 872      /* Check for md5 values */
 873      if (pkg->md5sum)
 874      {
 875          file_md5 = file_md5sum_alloc(pkg->local_filename);
 876          if (strcmp(file_md5, pkg->md5sum))
 877          {
 878               opkg_message(conf, OPKG_ERROR,
 879                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 880                            pkg->name);
 881               free(file_md5);
 882               return OPKG_INSTALL_ERR_MD5;
 883          }
 884          free(file_md5);
 885      }
 886
 887 #ifdef HAVE_SHA256
 888      /* Check for sha256 value */
 889      if(pkg->sha256sum)
 890      {
 891          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
 892          if (strcmp(file_sha256, pkg->sha256sum))
 893          {
 894               opkg_message(conf, OPKG_ERROR,
 895                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 896                            pkg->name);
 897               free(file_sha256);
 898               return OPKG_INSTALL_ERR_SHA256;
 899          }
 900          free(file_sha256);
 901      }
 902 #endif
 903
 904      if (pkg->tmp_unpack_dir == NULL) {
 905           unpack_pkg_control_files(conf, pkg);
 906      }
 907
 908      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 909 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 910 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 911      err = update_file_ownership(conf, pkg, old_pkg);
 912      if (err) { return OPKG_ERR_UNKNOWN; }
 913
 914      if (conf->nodeps == 0) {
 915           err = satisfy_dependencies_for(conf, pkg);
 916           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 917      }
 918
 919      replacees = pkg_vec_alloc();
 920      pkg_get_installed_replacees(conf, pkg, replacees);
 921
 922      sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 923      opkg_set_current_state (conf, OPKG_STATE_INSTALLING_PKG, pkgid);
 924      free (pkgid);
 925
 926      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 927      {
 928           sigset_t newset, oldset;
 929           sighandler_t old_handler = NULL;
 930           int use_signal = 0;
 931           caught_sigint = 0;
 932           if (use_signal) {
 933                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 934           } else {
 935                sigemptyset(&newset);
 936                sigaddset(&newset, SIGINT);
 937                sigprocmask(SIG_BLOCK, &newset, &oldset);
 938           }
 939
 940           opkg_state_changed++;
 941           pkg->state_flag |= SF_FILELIST_CHANGED;
 942
 943           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
 944
 945           /* XXX: BUG: we really should treat replacement more like an upgrade
 946            *      Instead, we're going to remove the replacees
 947            */
 948           err = pkg_remove_installed_replacees(conf, replacees);
 949           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 950
 951           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 952           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 953
 954           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 955           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 956
 957           err = preinst_configure(conf, pkg, old_pkg);
 958           if (err) goto UNWIND_PREINST_CONFIGURE;
 959
 960           err = backup_modified_conffiles(conf, pkg, old_pkg);
 961           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 962
 963           err = check_data_file_clashes(conf, pkg, old_pkg);
 964           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 965
 966           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 967           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 968
 969           if (conf->noaction) return 0;
 970
 971           /* point of no return: no unwinding after this */
 972           if (old_pkg && !conf->force_reinstall) {
 973                old_pkg->state_want = SW_DEINSTALL;
 974
 975                if (old_pkg->state_flag & SF_NOPRUNE) {
 976                     opkg_message(conf, OPKG_INFO,
 977                                  "  not removing obsolesced files because package marked noprune\n");
 978                } else {
 979                     opkg_message(conf, OPKG_INFO,
 980                                  "  removing obsolesced files\n");
 981                     remove_obsolesced_files(conf, pkg, old_pkg);
 982                }
 983                /* removing files from old package, to avoid ghost files */
 984                remove_data_files_and_list(conf, old_pkg);
 985 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 986                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 987                remove_postrm(conf, old_pkg);
 988 /* Pigi */
 989
 990           }
 991
 992
 993           opkg_message(conf, OPKG_INFO,
 994                        "  installing maintainer scripts\n");
 995           install_maintainer_scripts(conf, pkg, old_pkg);
 996
 997           /* the following just returns 0 */
 998           remove_disappeared(conf, pkg);
 999
1000           opkg_message(conf, OPKG_INFO,
1001                        "  installing data files\n");
1002           install_data_files(conf, pkg);
1003
1004 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
1005           err = check_data_file_clashes_change(conf, pkg, old_pkg);
1006
1007           opkg_message(conf, OPKG_INFO,
1008                        "  resolving conf files\n");
1009           resolve_conffiles(conf, pkg);
1010
1011           pkg->state_status = SS_UNPACKED;
1012           old_state_flag = pkg->state_flag;
1013           pkg->state_flag &= ~SF_PREFER;
1014           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1015
1016           if (old_pkg && !conf->force_reinstall) {
1017                old_pkg->state_status = SS_NOT_INSTALLED;
1018           }
1019
1020           time(&pkg->installed_time);
1021
1022           opkg_message(conf, OPKG_INFO,
1023                        "  cleanup temp files\n");
1024           cleanup_temporary_files(conf, pkg);
1025
1026           ab_pkg = pkg->parent;
1027           if (ab_pkg)
1028                ab_pkg->state_status = pkg->state_status;
1029
1030           opkg_message(conf, OPKG_INFO, "Done.\n");
1031
1032           if (use_signal)
1033                signal(SIGINT, old_handler);
1034           else
1035                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1036           pkg_vec_free (replacees);
1037           return 0;
1038
1039
1040      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1041           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1042      UNWIND_CHECK_DATA_FILE_CLASHES:
1043           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1044      UNWIND_BACKUP_MODIFIED_CONFFILES:
1045           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1046      UNWIND_PREINST_CONFIGURE:
1047           preinst_configure_unwind(conf, pkg, old_pkg);
1048      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1049           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1050      UNWIND_PRERM_UPGRADE_OLD_PKG:
1051           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1052      UNWIND_REMOVE_INSTALLED_REPLACEES:
1053           pkg_remove_installed_replacees_unwind(conf, replacees);
1054
1055           opkg_message(conf, OPKG_INFO,
1056                        "  cleanup temp files\n");
1057           cleanup_temporary_files(conf, pkg);
1058
1059           opkg_message(conf, OPKG_INFO,
1060                        "Failed.\n");
1061           if (use_signal)
1062                signal(SIGINT, old_handler);
1063           else
1064                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1065
1066           pkg_vec_free (replacees);
1067           return OPKG_ERR_UNKNOWN;
1068      }
1069      opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
1070 }
1071
1072 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1073 {
1074      /* DPKG_INCOMPATIBILITY:
1075         dpkg does some things here that we don't do yet. Do we care?
1076
1077         1. If a version of the package is already installed, call
1078            old-prerm upgrade new-version
1079         2. If the script runs but exits with a non-zero exit status
1080            new-prerm failed-upgrade old-version
1081            Error unwind, for both the above cases:
1082            old-postinst abort-upgrade new-version
1083      */
1084      return 0;
1085 }
1086
1087 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1088 {
1089      /* DPKG_INCOMPATIBILITY:
1090         dpkg does some things here that we don't do yet. Do we care?
1091         (See prerm_upgrade_old_package for details)
1092      */
1093      return 0;
1094 }
1095
1096 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1097 {
1098      /* DPKG_INCOMPATIBILITY:
1099         dpkg does some things here that we don't do yet. Do we care?
1100         2. If a 'conflicting' package is being removed at the same time:
1101                 1. If any packages depended on that conflicting package and
1102                    --auto-deconfigure is specified, call, for each such package:
1103                    deconfigured's-prerm deconfigure \
1104                    in-favour package-being-installed version \
1105                    removing conflicting-package version
1106                 Error unwind:
1107                    deconfigured's-postinst abort-deconfigure \
1108                    in-favour package-being-installed-but-failed version \
1109                    removing conflicting-package version
1110
1111                    The deconfigured packages are marked as requiring
1112                    configuration, so that if --install is used they will be
1113                    configured again if possible.
1114                 2. To prepare for removal of the conflicting package, call:
1115                    conflictor's-prerm remove in-favour package new-version
1116                 Error unwind:
1117                    conflictor's-postinst abort-remove in-favour package new-version
1118      */
1119      return 0;
1120 }
1121
1122 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1123 {
1124      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1125         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1126         details) */
1127      return 0;
1128 }
1129
1130 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1131 {
1132      int err;
1133      char *preinst_args;
1134
1135      if (old_pkg) {
1136           char *old_version = pkg_version_str_alloc(old_pkg);
1137           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1138           free(old_version);
1139      } else if (pkg->state_status == SS_CONFIG_FILES) {
1140           char *pkg_version = pkg_version_str_alloc(pkg);
1141           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1142           free(pkg_version);
1143      } else {
1144           preinst_args = strdup("install");
1145      }
1146
1147      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1148      if (err) {
1149           opkg_message(conf, OPKG_ERROR,
1150                        "Aborting installation of %s\n", pkg->name);
1151           return 1;
1152      }
1153
1154      free(preinst_args);
1155
1156      return 0;
1157 }
1158
1159 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1160 {
1161      /* DPKG_INCOMPATIBILITY:
1162         dpkg does the following error unwind, should we?
1163         pkg->postrm abort-upgrade old-version
1164         OR pkg->postrm abort-install old-version
1165         OR pkg->postrm abort-install
1166      */
1167      return 0;
1168 }
1169
1170 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1171 {
1172      int err;
1173      conffile_list_elt_t *iter;
1174      conffile_t *cf;
1175
1176      if (conf->noaction) return 0;
1177
1178      /* Backup all modified conffiles */
1179      if (old_pkg) {
1180           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1181                char *cf_name;
1182
1183                cf = iter->data;
1184                cf_name = root_filename_alloc(conf, cf->name);
1185
1186                /* Don't worry if the conffile is just plain gone */
1187                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1188                     err = backup_make_backup(conf, cf_name);
1189                     if (err) {
1190                          return err;
1191                     }
1192                }
1193                free(cf_name);
1194           }
1195      }
1196
1197      /* Backup all conffiles that were not conffiles in old_pkg */
1198      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1199           char *cf_name;
1200           cf = (conffile_t *)iter->data;
1201           cf_name = root_filename_alloc(conf, cf->name);
1202           /* Ignore if this was a conffile in old_pkg as well */
1203           if (pkg_get_conffile(old_pkg, cf->name)) {
1204                continue;
1205           }
1206
1207           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1208                err = backup_make_backup(conf, cf_name);
1209                if (err) {
1210                     return err;
1211                }
1212           }
1213           free(cf_name);
1214      }
1215
1216      return 0;
1217 }
1218
1219 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1220 {
1221      conffile_list_elt_t *iter;
1222
1223      if (old_pkg) {
1224           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1225                backup_remove(((nv_pair_t *)iter->data)->name);
1226           }
1227      }
1228
1229      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1230           backup_remove(((nv_pair_t *)iter->data)->name);
1231      }
1232
1233      return 0;
1234 }
1235
1236
1237 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1238 {
1239      /* DPKG_INCOMPATIBILITY:
1240         opkg takes a slightly different approach than dpkg at this
1241         point.  dpkg installs each file in the new package while
1242         creating a backup for any file that is replaced, (so that it
1243         can unwind if necessary).  To avoid complexity and redundant
1244         storage, opkg doesn't do any installation until later, (at the
1245         point at which dpkg removes the backups.
1246
1247         But, we do have to check for data file clashes, since after
1248         installing a package with a file clash, removing either of the
1249         packages involved in the clash has the potential to break the
1250         other package.
1251      */
1252      str_list_t *files_list;
1253      str_list_elt_t *iter, *niter;
1254
1255      int clashes = 0;
1256
1257      files_list = pkg_get_installed_files(pkg);
1258      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1259              iter;
1260              iter = niter, niter = str_list_next(files_list, iter)) {
1261           char *root_filename;
1262           char *filename = (char *) iter->data;
1263           root_filename = root_filename_alloc(conf, filename);
1264           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1265                pkg_t *owner;
1266                pkg_t *obs;
1267                /* Pre-existing conffiles are OK */
1268                /* @@@@ should have way to check that it is a conffile -Jamey */
1269                if (backup_exists_for(root_filename)) {
1270                     continue;
1271                }
1272
1273                /* Pre-existing files are OK if force-overwrite was asserted. */
1274                if (conf->force_overwrite) {
1275                     /* but we need to change who owns this file */
1276                     file_hash_set_file_owner(conf, filename, pkg);
1277                     continue;
1278                }
1279
1280                owner = file_hash_get_file_owner(conf, filename);
1281
1282                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1283                if (owner && old_pkg) {
1284                     if (strcmp(owner->name, old_pkg->name) == 0) {
1285                          continue;
1286                     }
1287                }
1288
1289                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1290                if (owner) {
1291                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1292                     if (pkg_replaces(pkg, owner)) {
1293                          continue;
1294                     }
1295 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1296    then it's ok to overwrite. */
1297                     if (strcmp(owner->name,pkg->name)==0){
1298                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1299                          continue;
1300                     }
1301                }
1302
1303                /* Pre-existing files are OK if they are obsolete */
1304                obs = hash_table_get(&conf->obs_file_hash, filename);
1305                if (obs) {
1306                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1307                     continue;
1308                }
1309
1310                /* We have found a clash. */
1311                opkg_message(conf, OPKG_ERROR,
1312                             "Package %s wants to install file %s\n"
1313                             "\tBut that file is already provided by package ",
1314                             pkg->name, filename);
1315                if (owner) {
1316                     opkg_message(conf, OPKG_ERROR,
1317                                  "%s\n", owner->name);
1318                } else {
1319                     opkg_message(conf, OPKG_ERROR,
1320                                  "<no package>\nPlease move this file out of the way and try again.\n");
1321                }
1322                clashes++;
1323           }
1324           free(root_filename);
1325      }
1326      pkg_free_installed_files(pkg);
1327
1328      return clashes;
1329 }
1330
1331 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1332 {
1333     /* Basically that's the worst hack I could do to be able to change ownership of
1334        file list, but, being that we have no way to unwind the mods, due to structure
1335        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1336        What we do here is change the ownership of file in hash if a replace ( or similar events
1337        happens )
1338        Only the action that are needed to change name should be considered.
1339        @@@ To change after 1.0 release.
1340      */
1341      str_list_t *files_list;
1342      str_list_elt_t *iter, *niter;
1343
1344      char *root_filename = NULL;
1345
1346      int clashes = 0;
1347
1348      files_list = pkg_get_installed_files(pkg);
1349      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1350              iter;
1351              iter = niter, niter = str_list_next(files_list, niter)) {
1352           char *filename = (char *) iter->data;
1353           if (root_filename) {
1354               free(root_filename);
1355               root_filename = NULL;
1356           }
1357           root_filename = root_filename_alloc(conf, filename);
1358           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1359                pkg_t *owner;
1360
1361                owner = file_hash_get_file_owner(conf, filename);
1362
1363                if (conf->force_overwrite) {
1364                     /* but we need to change who owns this file */
1365                     file_hash_set_file_owner(conf, filename, pkg);
1366                     continue;
1367                }
1368
1369
1370                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1371                if (owner) {
1372                     if (pkg_replaces(pkg, owner)) {
1373 /* It's now time to change the owner of that file.
1374    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1375                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1376                          file_hash_set_file_owner(conf, filename, pkg);
1377                          continue;
1378                     }
1379                }
1380
1381           }
1382      }
1383      if (root_filename) {
1384          free(root_filename);
1385          root_filename = NULL;
1386      }
1387      pkg_free_installed_files(pkg);
1388
1389      return clashes;
1390 }
1391
1392 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1393 {
1394      /* Nothing to do since check_data_file_clashes doesn't change state */
1395      return 0;
1396 }
1397
1398 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1399 {
1400      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1401         1. If the package is being upgraded, call
1402            old-postrm upgrade new-version
1403         2. If this fails, attempt:
1404            new-postrm failed-upgrade old-version
1405         Error unwind, for both cases:
1406            old-preinst abort-upgrade new-version    */
1407      return 0;
1408 }
1409
1410 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1411 {
1412      /* DPKG_INCOMPATIBILITY:
1413         dpkg does some things here that we don't do yet. Do we care?
1414         (See postrm_upgrade_old_pkg for details)
1415      */
1416     return 0;
1417 }
1418
1419 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1420 {
1421      int err;
1422      str_list_t *old_files;
1423      str_list_elt_t *of;
1424      str_list_t *new_files;
1425      str_list_elt_t *nf;
1426      hash_table_t new_files_table;
1427
1428      if (old_pkg == NULL) {
1429           return 0;
1430      }
1431
1432      old_files = pkg_get_installed_files(old_pkg);
1433      new_files = pkg_get_installed_files(pkg);
1434
1435      new_files_table.entries = NULL;
1436      hash_table_init("new_files" , &new_files_table, 20);
1437      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1438          if (nf && nf->data)
1439             hash_table_insert(&new_files_table, nf->data, nf->data);
1440      }
1441
1442      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1443           pkg_t *owner;
1444           char *old, *new;
1445           old = (char *)of->data;
1446           new = (char *) hash_table_get (&new_files_table, old);
1447           if (new)
1448                continue;
1449
1450           if (file_is_dir(old)) {
1451                continue;
1452           }
1453           owner = file_hash_get_file_owner(conf, old);
1454           if (owner != old_pkg) {
1455                /* in case obsolete file no longer belongs to old_pkg */
1456                continue;
1457           }
1458
1459           /* old file is obsolete */
1460           opkg_message(conf, OPKG_INFO,
1461                        "    removing obsolete file %s\n", old);
1462           if (!conf->noaction) {
1463                err = unlink(old);
1464                if (err) {
1465                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1466                                  strerror(errno));
1467                }
1468           }
1469      }
1470
1471      hash_table_deinit(&new_files_table);
1472      pkg_free_installed_files(old_pkg);
1473      pkg_free_installed_files(pkg);
1474
1475      return 0;
1476 }
1477
1478 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1479 {
1480      int i;
1481      int err = 0;
1482      char *globpattern;
1483      glob_t globbuf;
1484      if (0) {
1485           if (!pkg->dest) {
1486                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1487                return -1;
1488           }
1489           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1490           err = glob(globpattern, 0, NULL, &globbuf);
1491           free(globpattern);
1492           if (err) {
1493                return err;
1494           }
1495           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1496           for (i = 0; i < globbuf.gl_pathc; i++) {
1497                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1498                             globbuf.gl_pathv[i], old_pkg->name);
1499                if (!conf->noaction)
1500                     unlink(globbuf.gl_pathv[i]);
1501           }
1502           globfree(&globbuf);
1503      }
1504      return err;
1505 }
1506
1507 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1508 {
1509      int ret;
1510      char *prefix;
1511
1512      if (old_pkg)
1513           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1514      sprintf_alloc(&prefix, "%s.", pkg->name);
1515      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1516                                                         pkg->dest->info_dir,
1517                                                         prefix);
1518      free(prefix);
1519      return ret;
1520 }
1521
1522 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1523 {
1524      /* DPKG_INCOMPATIBILITY:
1525         This is a fairly sophisticated dpkg operation. Shall we
1526         skip it? */
1527
1528      /* Any packages all of whose files have been overwritten during the
1529         installation, and which aren't required for dependencies, are
1530         considered to have been removed. For each such package
1531         1. disappearer's-postrm disappear overwriter overwriter-version
1532         2. The package's maintainer scripts are removed
1533         3. It is noted in the status database as being in a sane state,
1534            namely not installed (any conffiles it may have are ignored,
1535            rather than being removed by dpkg). Note that disappearing
1536            packages do not have their prerm called, because dpkg doesn't
1537            know in advance that the package is going to vanish.
1538      */
1539      return 0;
1540 }
1541
1542 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1543 {
1544      int err;
1545
1546      /* opkg takes a slightly different approach to data file backups
1547         than dpkg. Rather than removing backups at this point, we
1548         actually do the data file installation now. See comments in
1549         check_data_file_clashes() for more details. */
1550
1551      opkg_message(conf, OPKG_INFO,
1552                   "    extracting data files to %s\n", pkg->dest->root_dir);
1553      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1554      if (err) {
1555           return err;
1556      }
1557
1558      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1559         so we can't save ourself from removing important packages
1560         At this point we (should) have extracted the .control file, so it
1561         would be a good idea to reload the data in it, and set the Essential
1562         state in *pkg. From now on the Essential is back in status file and
1563         we can protect again.
1564         We should operate this way:
1565         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1566         check for "Essential" in it
1567         set the value in pkg->essential.
1568         This new routine could be useful also for every other flag
1569         Pigi: 16/03/2004 */
1570      set_flags_from_control(conf, pkg) ;
1571
1572      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1573      err = pkg_write_filelist(conf, pkg);
1574      if (err)
1575           return err;
1576
1577      /* XXX: FEATURE: opkg should identify any files which existed
1578         before installation and which were overwritten, (see
1579         check_data_file_clashes()). What it must do is remove any such
1580         files from the filelist of the old package which provided the
1581         file. Otherwise, if the old package were removed at some point
1582         it would break the new package. Removing the new package will
1583         also break the old one, but this cannot be helped since the old
1584         package's file has already been deleted. This is the importance
1585         of check_data_file_clashes(), and only allowing opkg to install
1586         a clashing package with a user force. */
1587
1588      return 0;
1589 }
1590
1591 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1592 {
1593      conffile_list_elt_t *iter;
1594      conffile_t *cf;
1595      char *cf_backup;
1596
1597     char *md5sum;
1598
1599
1600      if (conf->noaction) return 0;
1601
1602      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1603           char *root_filename;
1604           cf = (conffile_t *)iter->data;
1605           root_filename = root_filename_alloc(conf, cf->name);
1606
1607           /* Might need to initialize the md5sum for each conffile */
1608           if (cf->value == NULL) {
1609                cf->value = file_md5sum_alloc(root_filename);
1610           }
1611
1612           if (!file_exists(root_filename)) {
1613                free(root_filename);
1614                continue;
1615           }
1616
1617           cf_backup = backup_filename_alloc(root_filename);
1618
1619
1620           if (file_exists(cf_backup)) {
1621               /* Let's compute md5 to test if files are changed */
1622               md5sum = file_md5sum_alloc(cf_backup);
1623               if (strcmp( cf->value,md5sum) != 0 ) {
1624                   if (conf->force_maintainer) {
1625                       opkg_message(conf, OPKG_NOTICE, "Conffile %s using maintainer's setting.\n", cf_backup);
1626                   } else if (conf->force_defaults
1627                           || user_prefers_old_conffile(cf->name, cf_backup) ) {
1628                       rename(cf_backup, root_filename);
1629                   }
1630               }
1631               unlink(cf_backup);
1632               free(md5sum);
1633           }
1634
1635           free(cf_backup);
1636           free(root_filename);
1637      }
1638
1639      return 0;
1640 }
1641
1642 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1643 {
1644      char *response;
1645      const char *short_file_name;
1646
1647      short_file_name = strrchr(file_name, '/');
1648      if (short_file_name) {
1649           short_file_name++;
1650      } else {
1651           short_file_name = file_name;
1652      }
1653
1654      while (1) {
1655           response = get_user_response("    Configuration file '%s'\n"
1656                                        "    ==> File on system created by you or by a script.\n"
1657                                        "    ==> File also in package provided by package maintainer.\n"
1658                                        "       What would you like to do about it ?  Your options are:\n"
1659                                        "        Y or I  : install the package maintainer's version\n"
1660                                        "        N or O  : keep your currently-installed version\n"
1661                                        "          D     : show the differences between the versions (if diff is installed)\n"
1662                                        "     The default action is to keep your current version.\n"
1663                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1664           if (strcmp(response, "y") == 0
1665               || strcmp(response, "i") == 0
1666               || strcmp(response, "yes") == 0) {
1667                free(response);
1668                return 0;
1669           }
1670
1671           if (strcmp(response, "d") == 0) {
1672                char *cmd;
1673
1674                free(response);
1675                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1676                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1677                xsystem(cmd);
1678                free(cmd);
1679                printf("    [Press ENTER to continue]\n");
1680                response = file_read_line_alloc(stdin);
1681                free(response);
1682                continue;
1683           }
1684
1685           free(response);
1686           return 1;
1687      }
1688 }
1689
1690 /* XXX: CLEANUP: I'd like to move all of the code for
1691    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1692    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1693    pkg_deinit for example). */
1694 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1695 {
1696      DIR *tmp_dir;
1697      struct dirent *dirent;
1698      char *tmp_file;
1699
1700 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1701 #error
1702      opkg_message(conf, OPKG_DEBUG,
1703                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1704                   __FUNCTION__, pkg->tmp_unpack_dir);
1705      return 0;
1706 #endif
1707
1708      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1709           tmp_dir = opendir(pkg->tmp_unpack_dir);
1710           if (tmp_dir) {
1711                while (1) {
1712                     dirent = readdir(tmp_dir);
1713                     if (dirent == NULL) {
1714                          break;
1715                     }
1716                     sprintf_alloc(&tmp_file, "%s/%s",
1717                                   pkg->tmp_unpack_dir, dirent->d_name);
1718                     if (! file_is_dir(tmp_file)) {
1719                          unlink(tmp_file);
1720                     }
1721                     free(tmp_file);
1722                }
1723                closedir(tmp_dir);
1724                rmdir(pkg->tmp_unpack_dir);
1725                free(pkg->tmp_unpack_dir);
1726                pkg->tmp_unpack_dir = NULL;
1727           }
1728      }
1729
1730      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1731                   pkg->name, pkg->local_filename, conf->tmp_dir);
1732      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1733           unlink(pkg->local_filename);
1734           free(pkg->local_filename);
1735           pkg->local_filename = NULL;
1736      }
1737
1738      return 0;
1739 }
1740
1741 static char *backup_filename_alloc(const char *file_name)
1742 {
1743      char *backup;
1744
1745      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1746
1747      return backup;
1748 }
1749
1750 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1751 {
1752      int err;
1753      char *backup;
1754
1755      backup = backup_filename_alloc(file_name);
1756      err = file_copy(file_name, backup);
1757      if (err) {
1758           opkg_message(conf, OPKG_ERROR,
1759                        "%s: Failed to copy %s to %s\n",
1760                        __FUNCTION__, file_name, backup);
1761      }
1762
1763      free(backup);
1764
1765      return err;
1766 }
1767
1768 static int backup_exists_for(const char *file_name)
1769 {
1770      int ret;
1771      char *backup;
1772
1773      backup = backup_filename_alloc(file_name);
1774
1775      ret = file_exists(backup);
1776
1777      free(backup);
1778
1779      return ret;
1780 }
1781
1782 static int backup_remove(const char *file_name)
1783 {
1784      char *backup;
1785
1786      backup = backup_filename_alloc(file_name);
1787      unlink(backup);
1788      free(backup);
1789
1790      return 0;
1791 }
1792