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_cmd.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      if (old) {
 109           old_version = pkg_version_str_alloc(old);
 110           new_version = pkg_version_str_alloc(pkg);
 111
 112           cmp = pkg_compare_versions(old, pkg);
 113           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 114              cmp = -1 ;                                       /* then we force opkg to downgrade */
 115                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 116                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 117           }
 118           if (cmp > 0) {
 119                  opkg_message(conf, OPKG_NOTICE,
 120                               "Not downgrading package %s on %s from %s to %s.\n",
 121                               old->name, old->dest->name, old_version, new_version);
 122                  pkg->state_want = SW_DEINSTALL;
 123                  pkg->state_flag |= SF_OBSOLETE;
 124                  free(old_version);
 125                  free(new_version);
 126                  return 0;
 127           } else {
 128                free(old_version);
 129                free(new_version);
 130           }
 131      }
 132
 133      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 134      return opkg_install_pkg(conf, pkg,0);
 135 }
 136
 137 opkg_error_t opkg_install_by_name(opkg_conf_t *conf, const char *pkg_name)
 138 {
 139      int cmp, err = 0;
 140      pkg_t *old, *new;
 141      char *old_version, *new_version;
 142
 143      opkg_message(conf, OPKG_DEBUG2, " Getting old  from pkg_hash_fetch \n" );
 144      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
 145      if ( old )
 146         opkg_message(conf, OPKG_DEBUG2, " Old versions from pkg_hash_fetch %s \n",  old->version );
 147
 148      opkg_message(conf, OPKG_DEBUG2, " Getting new  from pkg_hash_fetch \n" );
 149      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name, &err);
 150      if ( new )
 151         opkg_message(conf, OPKG_DEBUG2, " New versions from pkg_hash_fetch %s \n",  new->version );
 152
 153 /* Pigi Basically here is broken the version stuff.
 154    What's happening is that nothing provide the version to differents
 155    functions, so the returned struct is always the latest.
 156    That's why the install by name don't work.
 157 */
 158      opkg_message(conf, OPKG_DEBUG2, " Versions from pkg_hash_fetch in %s ", __FUNCTION__ );
 159
 160      if ( old )
 161         opkg_message(conf, OPKG_DEBUG2, " old %s ", old->version );
 162      if ( new )
 163         opkg_message(conf, OPKG_DEBUG2, " new %s ", new->version );
 164      opkg_message(conf, OPKG_DEBUG2, " \n");
 165
 166      if (new == NULL) {
 167           if (err)
 168             return err;
 169           else
 170             return OPKG_PKG_HAS_NO_CANDIDATE;
 171      }
 172
 173      new->state_flag |= SF_USER;
 174      if (old) {
 175           old_version = pkg_version_str_alloc(old);
 176           new_version = pkg_version_str_alloc(new);
 177
 178           cmp = pkg_compare_versions(old, new);
 179           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 180              opkg_message(conf, OPKG_DEBUG, " Forcing downgrade \n");
 181              cmp = -1 ;                                       /* then we force opkg to downgrade */
 182                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 183                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 184           }
 185           opkg_message(conf, OPKG_DEBUG,
 186                        "Comparing visible versions of pkg %s:"
 187                        "\n\t%s is installed "
 188                        "\n\t%s is available "
 189                        "\n\t%d was comparison result\n",
 190                        pkg_name, old_version, new_version, cmp);
 191           if (cmp == 0 && !conf->force_reinstall) {
 192                opkg_message(conf, OPKG_NOTICE,
 193                             "Package %s (%s) installed in %s is up to date.\n",
 194                             old->name, old_version, old->dest->name);
 195                free(old_version);
 196                free(new_version);
 197                return 0;
 198           } else if (cmp > 0) {
 199                opkg_message(conf, OPKG_NOTICE,
 200                             "Not downgrading package %s on %s from %s to %s.\n",
 201                             old->name, old->dest->name, old_version, new_version);
 202                free(old_version);
 203                free(new_version);
 204                return 0;
 205           } else if (cmp < 0) {
 206                new->dest = old->dest;
 207                old->state_want = SW_DEINSTALL;    /* Here probably the problem for bug 1277 */
 208           }
 209      }
 210
 211      /* XXX: CLEANUP: The error code of opkg_install_by_name is really
 212         supposed to be an opkg_error_t, but opkg_install_pkg could
 213         return any kind of integer, (might be errno from a syscall,
 214         etc.). This is a real mess and will need to be cleaned up if
 215         anyone ever wants to make a nice libopkg. */
 216
 217      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 218      return opkg_install_pkg(conf, new,0);
 219 }
 220
 221 opkg_error_t opkg_install_multi_by_name(opkg_conf_t *conf, const char *pkg_name)
 222 {
 223      abstract_pkg_vec_t *providers = pkg_hash_fetch_all_installation_candidates (&conf->pkg_hash, pkg_name);
 224      int i;
 225      opkg_error_t err;
 226      abstract_pkg_t *ppkg ;
 227
 228      if (providers == NULL)
 229           return OPKG_PKG_HAS_NO_CANDIDATE;
 230
 231      for (i = 0; i < providers->len; i++) {
 232           ppkg = abstract_pkg_vec_get(providers, i);
 233           opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_by_name %d \n",__FUNCTION__, i);
 234           err = opkg_install_by_name(conf, ppkg->name);
 235           if (err)
 236                return err;
 237 /* XXX Maybe ppkg should be freed ? */
 238      }
 239      return 0;
 240 }
 241
 242 /*
 243  * Walk dependence graph starting with pkg, collect packages to be
 244  * installed into pkgs_needed, in dependence order.
 245  */
 246 int pkg_mark_dependencies_for_installation(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *pkgs_needed)
 247 {
 248      int i, err;
 249      pkg_vec_t *depends = pkg_vec_alloc();
 250      char **unresolved = NULL;
 251      int ndepends;
 252
 253      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 254                                                         pkg, depends,
 255                                                         &unresolved);
 256
 257      if (unresolved) {
 258           opkg_message(conf, OPKG_ERROR,
 259                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 260                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 261           while (*unresolved) {
 262                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 263                unresolved++;
 264           }
 265           opkg_message(conf, OPKG_ERROR, "\n");
 266           if (! conf->force_depends) {
 267                opkg_message(conf, OPKG_INFO,
 268                             "This could mean that your package list is out of date or that the packages\n"
 269                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 270                             "of this problem try again with the '-force-depends' option.\n");
 271                pkg_vec_free(depends);
 272                return OPKG_PKG_DEPS_UNSATISFIED;
 273           }
 274      }
 275
 276      if (ndepends <= 0) {
 277           pkg_vec_free(depends);
 278           return 0;
 279      }
 280
 281      for (i = 0; i < depends->len; i++) {
 282           pkg_t *dep = depends->pkgs[i];
 283           /* The package was uninstalled when we started, but another
 284              dep earlier in this loop may have depended on it and pulled
 285              it in, so check first. */
 286           if ((dep->state_status != SS_INSTALLED)
 287               && (dep->state_status != SS_UNPACKED)
 288               && (dep->state_want != SW_INSTALL)) {
 289
 290                /* Mark packages as to-be-installed */
 291                dep->state_want = SW_INSTALL;
 292
 293                /* Dependencies should be installed the same place as pkg */
 294                if (dep->dest == NULL) {
 295                     dep->dest = pkg->dest;
 296                }
 297
 298                err = pkg_mark_dependencies_for_installation(conf, dep, pkgs_needed);
 299                if (err) {
 300                     pkg_vec_free(depends);
 301                     return err;
 302                }
 303           }
 304      }
 305      if (pkgs_needed)
 306           pkg_vec_insert(pkgs_needed, pkg);
 307
 308      pkg_vec_free(depends);
 309
 310      return 0;
 311 }
 312
 313 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg)
 314 {
 315      int i, err;
 316      pkg_vec_t *depends = pkg_vec_alloc();
 317      pkg_t *dep;
 318      char **unresolved = NULL;
 319      int ndepends;
 320
 321      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 322                                                         pkg, depends,
 323                                                         &unresolved);
 324
 325      if (unresolved) {
 326           opkg_message(conf, OPKG_ERROR,
 327                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 328                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 329           while (*unresolved) {
 330                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 331                unresolved++;
 332           }
 333           opkg_message(conf, OPKG_ERROR, "\n");
 334           if (! conf->force_depends) {
 335                opkg_message(conf, OPKG_INFO,
 336                             "This could mean that your package list is out of date or that the packages\n"
 337                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 338                             "of this problem try again with the '-force-depends' option.\n");
 339                pkg_vec_free(depends);
 340                return OPKG_PKG_DEPS_UNSATISFIED;
 341           }
 342      }
 343
 344      if (ndepends <= 0) {
 345           pkg_vec_free(depends);
 346           return 0;
 347      }
 348
 349      /* Mark packages as to-be-installed */
 350      for (i=0; i < depends->len; i++) {
 351           /* Dependencies should be installed the same place as pkg */
 352           if (depends->pkgs[i]->dest == NULL) {
 353                depends->pkgs[i]->dest = pkg->dest;
 354           }
 355           depends->pkgs[i]->state_want = SW_INSTALL;
 356      }
 357
 358      for (i = 0; i < depends->len; i++) {
 359           dep = depends->pkgs[i];
 360           /* The package was uninstalled when we started, but another
 361              dep earlier in this loop may have depended on it and pulled
 362              it in, so check first. */
 363           if ((dep->state_status != SS_INSTALLED)
 364               && (dep->state_status != SS_UNPACKED)) {
 365                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 366                err = opkg_install_pkg(conf, dep,0);
 367                /* mark this package as having been automatically installed to
 368                 * satisfy a dependancy */
 369                dep->auto_installed = 1;
 370                if (err) {
 371                     pkg_vec_free(depends);
 372                     return err;
 373                }
 374           }
 375      }
 376
 377      pkg_vec_free(depends);
 378
 379      return 0;
 380 }
 381
 382
 383 /* check all packages have their dependences satisfied, e.g., in case an upgraded package split */
 384 int opkg_satisfy_all_dependences(opkg_conf_t *conf)
 385 {
 386      if (conf->nodeps == 0) {
 387           int i;
 388           pkg_vec_t *installed = pkg_vec_alloc();
 389           pkg_hash_fetch_all_installed(&conf->pkg_hash, installed);
 390           for (i = 0; i < installed->len; i++) {
 391                pkg_t *pkg = installed->pkgs[i];
 392                satisfy_dependencies_for(conf, pkg);
 393           }
 394           pkg_vec_free(installed);
 395      }
 396      return 0;
 397 }
 398
 399
 400 static int check_conflicts_for(opkg_conf_t *conf, pkg_t *pkg)
 401 {
 402      int i;
 403      pkg_vec_t *conflicts = NULL;
 404      int level;
 405      const char *prefix;
 406      if (conf->force_depends) {
 407           level = OPKG_NOTICE;
 408           prefix = "Warning";
 409      } else {
 410           level = OPKG_ERROR;
 411           prefix = "ERROR";
 412      }
 413
 414      if (!conf->force_depends)
 415           conflicts = (pkg_vec_t *)pkg_hash_fetch_conflicts(&conf->pkg_hash, pkg);
 416
 417      if (conflicts) {
 418           opkg_message(conf, level,
 419                        "%s: The following packages conflict with %s:\n\t", prefix, pkg->name);
 420           i = 0;
 421           while (i < conflicts->len)
 422                opkg_message(conf, level, " %s", conflicts->pkgs[i++]->name);
 423           opkg_message(conf, level, "\n");
 424           pkg_vec_free(conflicts);
 425           return OPKG_PKG_DEPS_UNSATISFIED;
 426      }
 427      return 0;
 428 }
 429
 430 static int update_file_ownership(opkg_conf_t *conf, pkg_t *new_pkg, pkg_t *old_pkg)
 431 {
 432      str_list_t *new_list = pkg_get_installed_files(new_pkg);
 433      str_list_elt_t *iter, *niter;
 434
 435      for (iter = str_list_first(new_list), niter = str_list_next(new_list, iter);
 436              iter;
 437              iter = niter, niter = str_list_next(new_list, niter)) {
 438           char *new_file = (char *)iter->data;
 439           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
 440           if (!new_file)
 441                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
 442           if (!owner || (owner == old_pkg))
 443                file_hash_set_file_owner(conf, new_file, new_pkg);
 444      }
 445      if (old_pkg) {
 446           str_list_t *old_list = pkg_get_installed_files(old_pkg);
 447           for (iter = str_list_first(old_list), niter = str_list_next(old_list, iter);
 448                   iter;
 449                   iter = niter, niter = str_list_next(old_list, niter)) {
 450                char *old_file = (char *)iter->data;
 451                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
 452                if (owner == old_pkg) {
 453                     /* obsolete */
 454                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
 455                }
 456           }
 457           pkg_free_installed_files(old_pkg);
 458      }
 459      pkg_free_installed_files(new_pkg);
 460      return 0;
 461 }
 462
 463 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
 464 {
 465     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
 466
 467     /* sma 6.20.02:  yup; here's the first bit */
 468     /*
 469      * XXX: BUG easy for cworth
 470      * 1) please point the call below to the correct current root destination
 471      * 2) we need to resolve how to check the required space for a pending pkg,
 472      *    my diddling with the .opk file size below isn't going to cut it.
 473      * 3) return a proper error code instead of 1
 474      */
 475      int comp_size, blocks_available;
 476      char *root_dir;
 477
 478      if (!conf->force_space && pkg->installed_size != NULL) {
 479           root_dir = pkg->dest ? pkg->dest->root_dir : conf->default_dest->root_dir;
 480           blocks_available = get_available_blocks(root_dir);
 481
 482           comp_size = strtoul(pkg->installed_size, NULL, 0);
 483           /* round up a blocks count without doing fancy-but-slow casting jazz */
 484           comp_size = (int)((comp_size + 1023) / 1024);
 485
 486           if (comp_size >= blocks_available) {
 487                opkg_message(conf, OPKG_ERROR,
 488                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n",
 489                             blocks_available, root_dir, pkg->name, comp_size);
 490                return ENOSPC;
 491           }
 492      }
 493      return 0;
 494 }
 495
 496 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
 497 {
 498      int err;
 499      char *conffiles_file_name;
 500      char *root_dir;
 501      FILE *conffiles_file;
 502
 503      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
 504
 505      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
 506      if (pkg->tmp_unpack_dir == NULL) {
 507           opkg_message(conf, OPKG_ERROR,
 508                        "%s: Failed to create temporary directory '%s': %s\n",
 509                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
 510           return errno;
 511      }
 512
 513      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
 514      if (err) {
 515           return err;
 516      }
 517
 518      /* XXX: CLEANUP: There might be a cleaner place to read in the
 519         conffiles. Seems like I should be able to get everything to go
 520         through pkg_init_from_file. If so, maybe it would make sense to
 521         move all of unpack_pkg_control_files to that function. */
 522
 523      /* Don't need to re-read conffiles if we already have it */
 524      if (!nv_pair_list_empty(&pkg->conffiles)) {
 525           return 0;
 526      }
 527
 528      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
 529      if (! file_exists(conffiles_file_name)) {
 530           free(conffiles_file_name);
 531           return 0;
 532      }
 533
 534      conffiles_file = fopen(conffiles_file_name, "r");
 535      if (conffiles_file == NULL) {
 536           fprintf(stderr, "%s: failed to open %s: %s\n",
 537                   __FUNCTION__, conffiles_file_name, strerror(errno));
 538           free(conffiles_file_name);
 539           return errno;
 540      }
 541      free(conffiles_file_name);
 542
 543      while (1) {
 544           char *cf_name;
 545           char *cf_name_in_dest;
 546
 547           cf_name = file_read_line_alloc(conffiles_file);
 548           if (cf_name == NULL) {
 549                break;
 550           }
 551           str_chomp(cf_name);
 552           if (cf_name[0] == '\0') {
 553                continue;
 554           }
 555
 556           /* Prepend dest->root_dir to conffile name.
 557              Take pains to avoid multiple slashes. */
 558           root_dir = pkg->dest->root_dir;
 559           if (conf->offline_root)
 560                /* skip the offline_root prefix */
 561                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
 562           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
 563                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
 564
 565           /* Can't get an md5sum now, (file isn't extracted yet).
 566              We'll wait until resolve_conffiles */
 567           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
 568
 569           free(cf_name);
 570           free(cf_name_in_dest);
 571      }
 572
 573      fclose(conffiles_file);
 574
 575      return 0;
 576 }
 577
 578 static int pkg_remove_orphan_dependent(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 579 {
 580     int i, j, found;
 581     char *buf, *d_str;
 582     pkg_t *p;
 583     if (!old_pkg)
 584         return 0;
 585     if (!pkg) {
 586         fprintf(stderr, "pkg shall not be NULL here.  please send to the bugzilla!! [%s %d]\n", __FILE__, __LINE__);
 587         return -1;
 588     }
 589     if (old_pkg->depends_count == 0)
 590         return 0;
 591     for (i=0;i<old_pkg->depends_count;i++) {
 592         found = 0;
 593         for (j=0;j<pkg->depends_count;j++) {
 594             if (!strcmp(old_pkg->depends_str[i], pkg->depends_str[j])) {
 595                 found = 1;
 596                 break;
 597             }
 598         }
 599         if (found)
 600             continue;
 601         d_str = old_pkg->depends_str[i];
 602         buf = calloc (1, strlen (d_str) + 1);
 603         j=0;
 604         while (d_str[j] != '\0' && d_str[j] != ' ') {
 605             buf[j]=d_str[j];
 606             ++j;
 607         }
 608         buf[j]='\0';
 609         buf = realloc (buf, strlen (buf) + 1);
 610         p = pkg_hash_fetch_installed_by_name (&conf->pkg_hash, buf);
 611         if (!p) {
 612             fprintf(stderr, "The pkg %s had been removed!!\n", buf);
 613             free(buf);
 614             continue;
 615         }
 616         if (p->auto_installed) {
 617             int deps;
 618             abstract_pkg_t **dependents;
 619             deps = pkg_has_installed_dependents(conf, NULL, p, &dependents);
 620             if (deps == 0) {
 621                 opkg_message (conf, OPKG_NOTICE,"%s was autoinstalled but is now orphaned, remove it.\n", buf);
 622                 opkg_remove_pkg(conf, p, 0);
 623             } else
 624                 opkg_message (conf, OPKG_INFO, "%s was autoinstalled and is still required by %d installed packages\n", buf, deps);
 625         }
 626         free(buf);
 627     }
 628     return 0;
 629 }
 630
 631 /* returns number of installed replacees */
 632 int pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
 633 {
 634      abstract_pkg_t **replaces = pkg->replaces;
 635      int replaces_count = pkg->replaces_count;
 636      int i, j;
 637      for (i = 0; i < replaces_count; i++) {
 638           abstract_pkg_t *ab_pkg = replaces[i];
 639           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 640           if (pkg_vec) {
 641                for (j = 0; j < pkg_vec->len; j++) {
 642                     pkg_t *replacee = pkg_vec->pkgs[j];
 643                     if (!pkg_conflicts(pkg, replacee))
 644                          continue;
 645                     if (replacee->state_status == SS_INSTALLED) {
 646                          pkg_vec_insert(installed_replacees, replacee);
 647                     }
 648                }
 649           }
 650      }
 651      return installed_replacees->len;
 652 }
 653
 654 int pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
 655 {
 656      int i;
 657      int replaces_count = replacees->len;
 658      for (i = 0; i < replaces_count; i++) {
 659           pkg_t *replacee = replacees->pkgs[i];
 660           int err;
 661           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
 662           err = opkg_remove_pkg(conf, replacee,0);
 663           if (err)
 664                return err;
 665      }
 666      return 0;
 667 }
 668
 669 /* to unwind the removal: make sure they are installed */
 670 int pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
 671 {
 672      int i, err;
 673      int replaces_count = replacees->len;
 674      for (i = 0; i < replaces_count; i++) {
 675           pkg_t *replacee = replacees->pkgs[i];
 676           if (replacee->state_status != SS_INSTALLED) {
 677                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 678                err = opkg_install_pkg(conf, replacee,0);
 679                if (err)
 680                     return err;
 681           }
 682      }
 683      return 0;
 684 }
 685
 686 int caught_sigint = 0;
 687 static void opkg_install_pkg_sigint_handler(int sig)
 688 {
 689      caught_sigint = sig;
 690 }
 691
 692 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
 693 static int opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
 694 {
 695      if (old_pkg) {
 696           char message_out[15];
 697           char *old_version = pkg_version_str_alloc(old_pkg);
 698           char *new_version = pkg_version_str_alloc(pkg);
 699           int cmp = pkg_compare_versions(old_pkg, pkg);
 700           int rc = 0;
 701
 702           memset(message_out,'\x0',15);
 703           strncpy (message_out,"Upgrading ",strlen("Upgrading "));
 704           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 705              cmp = -1 ;                                       /* then we force opkg to downgrade */
 706              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
 707                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 708           }
 709
 710           if (cmp > 0) {
 711                opkg_message(conf, OPKG_NOTICE,
 712                             "Not downgrading package %s on %s from %s to %s.\n",
 713                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
 714                rc = 1;
 715           } else if (cmp < 0) {
 716                opkg_message(conf, OPKG_NOTICE,
 717                             "%s%s on %s from %s to %s...\n",
 718                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
 719                pkg->dest = old_pkg->dest;
 720                rc = 0;
 721           } else /* cmp == 0 */ {
 722                if (conf->force_reinstall) {
 723                     opkg_message(conf, OPKG_NOTICE,
 724                                  "Reinstalling %s (%s) on %s...\n",
 725                                  pkg->name, new_version, old_pkg->dest->name);
 726                     pkg->dest = old_pkg->dest;
 727                     rc = 0;
 728                } else {
 729                     opkg_message(conf, OPKG_NOTICE,
 730                                  "Not installing %s (%s) on %s -- already installed.\n",
 731                                  pkg->name, new_version, old_pkg->dest->name);
 732                     rc = 1;
 733                }
 734           }
 735           free(old_version);
 736           free(new_version);
 737           return rc;
 738      } else {
 739       char message_out[15] ;
 740       memset(message_out,'\x0',15);
 741       if ( message )
 742           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
 743       else
 744           strncpy( message_out,"Installing ",strlen("Installing ") );
 745           char *version = pkg_version_str_alloc(pkg);
 746
 747           opkg_message(conf, OPKG_NOTICE,
 748                        "%s%s (%s) to %s...\n", message_out,
 749                        pkg->name, version, pkg->dest->name);
 750           free(version);
 751           return 0;
 752      }
 753 }
 754
 755 /**
 756  *  @brief Really install a pkg_t
 757  */
 758 int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
 759 {
 760      int err = 0;
 761      int message = 0;
 762      pkg_t *old_pkg = NULL;
 763      pkg_vec_t *replacees;
 764      abstract_pkg_t *ab_pkg = NULL;
 765      int old_state_flag;
 766      char* file_md5;
 767 #ifdef HAVE_SHA256
 768      char* file_sha256;
 769 #endif
 770
 771      if ( from_upgrade )
 772         message = 1;            /* Coming from an upgrade, and should change the output message */
 773
 774      if (!pkg) {
 775           opkg_message(conf, OPKG_ERROR,
 776                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
 777           return OPKG_INSTALL_ERR_INTERNAL;
 778      }
 779
 780      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
 781
 782      if (!pkg_arch_supported(conf, pkg)) {
 783           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
 784                        pkg->architecture, pkg->name);
 785           return OPKG_INSTALL_ERR_INTERNAL;
 786      }
 787      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
 788           err = satisfy_dependencies_for(conf, pkg);
 789           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 790
 791           opkg_message(conf, OPKG_NOTICE,
 792                        "Package %s is already installed in %s.\n",
 793                        pkg->name, pkg->dest->name);
 794           return 0;
 795      }
 796
 797      if (pkg->dest == NULL) {
 798           pkg->dest = conf->default_dest;
 799      }
 800
 801      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 802
 803      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
 804      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
 805
 806      pkg->state_want = SW_INSTALL;
 807      if (old_pkg){
 808          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
 809      }
 810
 811
 812      /* Abhaya: conflicts check */
 813      err = check_conflicts_for(conf, pkg);
 814      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
 815
 816      /* this setup is to remove the upgrade scenario in the end when
 817         installing pkg A, A deps B & B deps on A. So both B and A are
 818         installed. Then A's installation is started resulting in an
 819         uncecessary upgrade */
 820      if (pkg->state_status == SS_INSTALLED
 821          && conf->force_reinstall == 0) return 0;
 822
 823      err = verify_pkg_installable(conf, pkg);
 824      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
 825
 826      if (pkg->local_filename == NULL) {
 827           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
 828           if (err) {
 829                opkg_message(conf, OPKG_ERROR,
 830                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
 831                             pkg->name);
 832                return OPKG_INSTALL_ERR_DOWNLOAD;
 833           }
 834      }
 835
 836      /* check that the repository is valid */
 837      #if defined(HAVE_GPGME) || defined(HAVE_OPENSSL)
 838      char *list_file_name, *sig_file_name, *lists_dir;
 839
 840      /* check to ensure the package has come from a repository */
 841      if (conf->check_signature && pkg->src)
 842      {
 843        sprintf_alloc (&lists_dir, "%s",
 844                      (conf->restrict_to_default_dest)
 845                       ? conf->default_dest->lists_dir
 846                       : conf->lists_dir);
 847        sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
 848        sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
 849
 850        if (file_exists (sig_file_name))
 851        {
 852          if (opkg_verify_file (conf, list_file_name, sig_file_name)){
 853            opkg_message(conf, OPKG_ERROR, "Failed to verify the signature of: %s\n",
 854                            list_file_name);
 855            return OPKG_INSTALL_ERR_SIGNATURE;
 856          }
 857        }else{
 858          opkg_message(conf, OPKG_ERROR, "Signature file is missing. "
 859                          "Perhaps you need to run 'opkg update'?\n");
 860          return OPKG_INSTALL_ERR_SIGNATURE;
 861        }
 862
 863        free (lists_dir);
 864        free (list_file_name);
 865        free (sig_file_name);
 866      }
 867      #endif
 868
 869      /* Check for md5 values */
 870      if (pkg->md5sum)
 871      {
 872          file_md5 = file_md5sum_alloc(pkg->local_filename);
 873          if (file_md5 && strcmp(file_md5, pkg->md5sum))
 874          {
 875               opkg_message(conf, OPKG_ERROR,
 876                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 877                            pkg->name);
 878               free(file_md5);
 879               return OPKG_INSTALL_ERR_MD5;
 880          }
 881          if (file_md5)
 882               free(file_md5);
 883      }
 884
 885 #ifdef HAVE_SHA256
 886      /* Check for sha256 value */
 887      if(pkg->sha256sum)
 888      {
 889          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
 890          if (file_sha256 && strcmp(file_sha256, pkg->sha256sum))
 891          {
 892               opkg_message(conf, OPKG_ERROR,
 893                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 894                            pkg->name);
 895               free(file_sha256);
 896               return OPKG_INSTALL_ERR_SHA256;
 897          }
 898          if (file_sha256)
 899               free(file_sha256);
 900      }
 901 #endif
 902
 903      if (pkg->tmp_unpack_dir == NULL) {
 904           unpack_pkg_control_files(conf, pkg);
 905      }
 906
 907      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 908 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 909 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 910      err = update_file_ownership(conf, pkg, old_pkg);
 911      if (err) { return OPKG_ERR_UNKNOWN; }
 912
 913      if (conf->nodeps == 0) {
 914           err = satisfy_dependencies_for(conf, pkg);
 915           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 916      }
 917
 918      replacees = pkg_vec_alloc();
 919      pkg_get_installed_replacees(conf, pkg, replacees);
 920
 921      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 922      {
 923           sigset_t newset, oldset;
 924           sighandler_t old_handler = NULL;
 925           int use_signal = 0;
 926           caught_sigint = 0;
 927           if (use_signal) {
 928                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 929           } else {
 930                sigemptyset(&newset);
 931                sigaddset(&newset, SIGINT);
 932                sigprocmask(SIG_BLOCK, &newset, &oldset);
 933           }
 934
 935           opkg_state_changed++;
 936           pkg->state_flag |= SF_FILELIST_CHANGED;
 937
 938           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
 939
 940           /* XXX: BUG: we really should treat replacement more like an upgrade
 941            *      Instead, we're going to remove the replacees
 942            */
 943           err = pkg_remove_installed_replacees(conf, replacees);
 944           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 945
 946           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 947           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 948
 949           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 950           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 951
 952           err = preinst_configure(conf, pkg, old_pkg);
 953           if (err) goto UNWIND_PREINST_CONFIGURE;
 954
 955           err = backup_modified_conffiles(conf, pkg, old_pkg);
 956           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 957
 958           err = check_data_file_clashes(conf, pkg, old_pkg);
 959           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 960
 961           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 962           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 963
 964           if (conf->noaction) return 0;
 965
 966           /* point of no return: no unwinding after this */
 967           if (old_pkg && !conf->force_reinstall) {
 968                old_pkg->state_want = SW_DEINSTALL;
 969
 970                if (old_pkg->state_flag & SF_NOPRUNE) {
 971                     opkg_message(conf, OPKG_INFO,
 972                                  "  not removing obsolesced files because package marked noprune\n");
 973                } else {
 974                     opkg_message(conf, OPKG_INFO,
 975                                  "  removing obsolesced files\n");
 976                     remove_obsolesced_files(conf, pkg, old_pkg);
 977                }
 978                /* removing files from old package, to avoid ghost files */
 979                remove_data_files_and_list(conf, old_pkg);
 980 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 981                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 982                remove_postrm(conf, old_pkg);
 983 /* Pigi */
 984
 985           }
 986
 987
 988           opkg_message(conf, OPKG_INFO,
 989                        "  installing maintainer scripts\n");
 990           install_maintainer_scripts(conf, pkg, old_pkg);
 991
 992           /* the following just returns 0 */
 993           remove_disappeared(conf, pkg);
 994
 995           opkg_message(conf, OPKG_INFO,
 996                        "  installing data files\n");
 997           install_data_files(conf, pkg);
 998
 999 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
1000           err = check_data_file_clashes_change(conf, pkg, old_pkg);
1001
1002           opkg_message(conf, OPKG_INFO,
1003                        "  resolving conf files\n");
1004           resolve_conffiles(conf, pkg);
1005
1006           pkg->state_status = SS_UNPACKED;
1007           old_state_flag = pkg->state_flag;
1008           pkg->state_flag &= ~SF_PREFER;
1009           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1010
1011           if (old_pkg && !conf->force_reinstall) {
1012                old_pkg->state_status = SS_NOT_INSTALLED;
1013           }
1014
1015           time(&pkg->installed_time);
1016
1017           opkg_message(conf, OPKG_INFO,
1018                        "  cleanup temp files\n");
1019           cleanup_temporary_files(conf, pkg);
1020
1021           ab_pkg = pkg->parent;
1022           if (ab_pkg)
1023                ab_pkg->state_status = pkg->state_status;
1024
1025           opkg_message(conf, OPKG_INFO, "Done.\n");
1026
1027           if (use_signal)
1028                signal(SIGINT, old_handler);
1029           else
1030                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1031           pkg_vec_free (replacees);
1032           return 0;
1033
1034
1035      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1036           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1037      UNWIND_CHECK_DATA_FILE_CLASHES:
1038           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1039      UNWIND_BACKUP_MODIFIED_CONFFILES:
1040           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1041      UNWIND_PREINST_CONFIGURE:
1042           preinst_configure_unwind(conf, pkg, old_pkg);
1043      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1044           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1045      UNWIND_PRERM_UPGRADE_OLD_PKG:
1046           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1047      UNWIND_REMOVE_INSTALLED_REPLACEES:
1048           pkg_remove_installed_replacees_unwind(conf, replacees);
1049
1050           opkg_message(conf, OPKG_INFO,
1051                        "  cleanup temp files\n");
1052           cleanup_temporary_files(conf, pkg);
1053
1054           opkg_message(conf, OPKG_INFO,
1055                        "Failed.\n");
1056           if (use_signal)
1057                signal(SIGINT, old_handler);
1058           else
1059                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1060
1061           pkg_vec_free (replacees);
1062           return OPKG_ERR_UNKNOWN;
1063      }
1064 }
1065
1066 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1067 {
1068      /* DPKG_INCOMPATIBILITY:
1069         dpkg does some things here that we don't do yet. Do we care?
1070
1071         1. If a version of the package is already installed, call
1072            old-prerm upgrade new-version
1073         2. If the script runs but exits with a non-zero exit status
1074            new-prerm failed-upgrade old-version
1075            Error unwind, for both the above cases:
1076            old-postinst abort-upgrade new-version
1077      */
1078      return 0;
1079 }
1080
1081 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1082 {
1083      /* DPKG_INCOMPATIBILITY:
1084         dpkg does some things here that we don't do yet. Do we care?
1085         (See prerm_upgrade_old_package for details)
1086      */
1087      return 0;
1088 }
1089
1090 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1091 {
1092      /* DPKG_INCOMPATIBILITY:
1093         dpkg does some things here that we don't do yet. Do we care?
1094         2. If a 'conflicting' package is being removed at the same time:
1095                 1. If any packages depended on that conflicting package and
1096                    --auto-deconfigure is specified, call, for each such package:
1097                    deconfigured's-prerm deconfigure \
1098                    in-favour package-being-installed version \
1099                    removing conflicting-package version
1100                 Error unwind:
1101                    deconfigured's-postinst abort-deconfigure \
1102                    in-favour package-being-installed-but-failed version \
1103                    removing conflicting-package version
1104
1105                    The deconfigured packages are marked as requiring
1106                    configuration, so that if --install is used they will be
1107                    configured again if possible.
1108                 2. To prepare for removal of the conflicting package, call:
1109                    conflictor's-prerm remove in-favour package new-version
1110                 Error unwind:
1111                    conflictor's-postinst abort-remove in-favour package new-version
1112      */
1113      return 0;
1114 }
1115
1116 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1117 {
1118      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1119         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1120         details) */
1121      return 0;
1122 }
1123
1124 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1125 {
1126      int err;
1127      char *preinst_args;
1128
1129      if (old_pkg) {
1130           char *old_version = pkg_version_str_alloc(old_pkg);
1131           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1132           free(old_version);
1133      } else if (pkg->state_status == SS_CONFIG_FILES) {
1134           char *pkg_version = pkg_version_str_alloc(pkg);
1135           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1136           free(pkg_version);
1137      } else {
1138           preinst_args = strdup("install");
1139      }
1140
1141      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1142      if (err) {
1143           opkg_message(conf, OPKG_ERROR,
1144                        "Aborting installation of %s\n", pkg->name);
1145           return 1;
1146      }
1147
1148      free(preinst_args);
1149
1150      return 0;
1151 }
1152
1153 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1154 {
1155      /* DPKG_INCOMPATIBILITY:
1156         dpkg does the following error unwind, should we?
1157         pkg->postrm abort-upgrade old-version
1158         OR pkg->postrm abort-install old-version
1159         OR pkg->postrm abort-install
1160      */
1161      return 0;
1162 }
1163
1164 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1165 {
1166      int err;
1167      conffile_list_elt_t *iter;
1168      conffile_t *cf;
1169
1170      if (conf->noaction) return 0;
1171
1172      /* Backup all modified conffiles */
1173      if (old_pkg) {
1174           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1175                char *cf_name;
1176
1177                cf = iter->data;
1178                cf_name = root_filename_alloc(conf, cf->name);
1179
1180                /* Don't worry if the conffile is just plain gone */
1181                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1182                     err = backup_make_backup(conf, cf_name);
1183                     if (err) {
1184                          return err;
1185                     }
1186                }
1187                free(cf_name);
1188           }
1189      }
1190
1191      /* Backup all conffiles that were not conffiles in old_pkg */
1192      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1193           char *cf_name;
1194           cf = (conffile_t *)iter->data;
1195           cf_name = root_filename_alloc(conf, cf->name);
1196           /* Ignore if this was a conffile in old_pkg as well */
1197           if (pkg_get_conffile(old_pkg, cf->name)) {
1198                continue;
1199           }
1200
1201           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1202                err = backup_make_backup(conf, cf_name);
1203                if (err) {
1204                     return err;
1205                }
1206           }
1207           free(cf_name);
1208      }
1209
1210      return 0;
1211 }
1212
1213 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1214 {
1215      conffile_list_elt_t *iter;
1216
1217      if (old_pkg) {
1218           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1219                backup_remove(((nv_pair_t *)iter->data)->name);
1220           }
1221      }
1222
1223      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1224           backup_remove(((nv_pair_t *)iter->data)->name);
1225      }
1226
1227      return 0;
1228 }
1229
1230
1231 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1232 {
1233      /* DPKG_INCOMPATIBILITY:
1234         opkg takes a slightly different approach than dpkg at this
1235         point.  dpkg installs each file in the new package while
1236         creating a backup for any file that is replaced, (so that it
1237         can unwind if necessary).  To avoid complexity and redundant
1238         storage, opkg doesn't do any installation until later, (at the
1239         point at which dpkg removes the backups.
1240
1241         But, we do have to check for data file clashes, since after
1242         installing a package with a file clash, removing either of the
1243         packages involved in the clash has the potential to break the
1244         other package.
1245      */
1246      str_list_t *files_list;
1247      str_list_elt_t *iter, *niter;
1248
1249      int clashes = 0;
1250
1251      files_list = pkg_get_installed_files(pkg);
1252      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1253              iter;
1254              iter = niter, niter = str_list_next(files_list, iter)) {
1255           char *root_filename;
1256           char *filename = (char *) iter->data;
1257           root_filename = root_filename_alloc(conf, filename);
1258           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1259                pkg_t *owner;
1260                pkg_t *obs;
1261                /* Pre-existing conffiles are OK */
1262                /* @@@@ should have way to check that it is a conffile -Jamey */
1263                if (backup_exists_for(root_filename)) {
1264                     continue;
1265                }
1266
1267                /* Pre-existing files are OK if force-overwrite was asserted. */
1268                if (conf->force_overwrite) {
1269                     /* but we need to change who owns this file */
1270                     file_hash_set_file_owner(conf, filename, pkg);
1271                     continue;
1272                }
1273
1274                owner = file_hash_get_file_owner(conf, filename);
1275
1276                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1277                if (owner && old_pkg) {
1278                     if (strcmp(owner->name, old_pkg->name) == 0) {
1279                          continue;
1280                     }
1281                }
1282
1283                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1284                if (owner) {
1285                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1286                     if (pkg_replaces(pkg, owner)) {
1287                          continue;
1288                     }
1289 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1290    then it's ok to overwrite. */
1291                     if (strcmp(owner->name,pkg->name)==0){
1292                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1293                          continue;
1294                     }
1295                }
1296
1297                /* Pre-existing files are OK if they are obsolete */
1298                obs = hash_table_get(&conf->obs_file_hash, filename);
1299                if (obs) {
1300                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1301                     continue;
1302                }
1303
1304                /* We have found a clash. */
1305                opkg_message(conf, OPKG_ERROR,
1306                             "Package %s wants to install file %s\n"
1307                             "\tBut that file is already provided by package ",
1308                             pkg->name, filename);
1309                if (owner) {
1310                     opkg_message(conf, OPKG_ERROR,
1311                                  "%s\n", owner->name);
1312                } else {
1313                     opkg_message(conf, OPKG_ERROR,
1314                                  "<no package>\nPlease move this file out of the way and try again.\n");
1315                }
1316                clashes++;
1317           }
1318           free(root_filename);
1319      }
1320      pkg_free_installed_files(pkg);
1321
1322      return clashes;
1323 }
1324
1325 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1326 {
1327     /* Basically that's the worst hack I could do to be able to change ownership of
1328        file list, but, being that we have no way to unwind the mods, due to structure
1329        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1330        What we do here is change the ownership of file in hash if a replace ( or similar events
1331        happens )
1332        Only the action that are needed to change name should be considered.
1333        @@@ To change after 1.0 release.
1334      */
1335      str_list_t *files_list;
1336      str_list_elt_t *iter, *niter;
1337
1338      char *root_filename = NULL;
1339
1340      int clashes = 0;
1341
1342      files_list = pkg_get_installed_files(pkg);
1343      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1344              iter;
1345              iter = niter, niter = str_list_next(files_list, niter)) {
1346           char *filename = (char *) iter->data;
1347           if (root_filename) {
1348               free(root_filename);
1349               root_filename = NULL;
1350           }
1351           root_filename = root_filename_alloc(conf, filename);
1352           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1353                pkg_t *owner;
1354
1355                owner = file_hash_get_file_owner(conf, filename);
1356
1357                if (conf->force_overwrite) {
1358                     /* but we need to change who owns this file */
1359                     file_hash_set_file_owner(conf, filename, pkg);
1360                     continue;
1361                }
1362
1363
1364                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1365                if (owner) {
1366                     if (pkg_replaces(pkg, owner)) {
1367 /* It's now time to change the owner of that file.
1368    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1369                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1370                          file_hash_set_file_owner(conf, filename, pkg);
1371                          continue;
1372                     }
1373                }
1374
1375           }
1376      }
1377      if (root_filename) {
1378          free(root_filename);
1379          root_filename = NULL;
1380      }
1381      pkg_free_installed_files(pkg);
1382
1383      return clashes;
1384 }
1385
1386 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1387 {
1388      /* Nothing to do since check_data_file_clashes doesn't change state */
1389      return 0;
1390 }
1391
1392 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1393 {
1394      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1395         1. If the package is being upgraded, call
1396            old-postrm upgrade new-version
1397         2. If this fails, attempt:
1398            new-postrm failed-upgrade old-version
1399         Error unwind, for both cases:
1400            old-preinst abort-upgrade new-version    */
1401      return 0;
1402 }
1403
1404 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1405 {
1406      /* DPKG_INCOMPATIBILITY:
1407         dpkg does some things here that we don't do yet. Do we care?
1408         (See postrm_upgrade_old_pkg for details)
1409      */
1410     return 0;
1411 }
1412
1413 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1414 {
1415      int err;
1416      str_list_t *old_files;
1417      str_list_elt_t *of;
1418      str_list_t *new_files;
1419      str_list_elt_t *nf;
1420      hash_table_t new_files_table;
1421
1422      if (old_pkg == NULL) {
1423           return 0;
1424      }
1425
1426      old_files = pkg_get_installed_files(old_pkg);
1427      new_files = pkg_get_installed_files(pkg);
1428
1429      new_files_table.entries = NULL;
1430      hash_table_init("new_files" , &new_files_table, 20);
1431      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1432          if (nf && nf->data)
1433             hash_table_insert(&new_files_table, nf->data, nf->data);
1434      }
1435
1436      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1437           pkg_t *owner;
1438           char *old, *new;
1439           old = (char *)of->data;
1440           new = (char *) hash_table_get (&new_files_table, old);
1441           if (new)
1442                continue;
1443
1444           if (file_is_dir(old)) {
1445                continue;
1446           }
1447           owner = file_hash_get_file_owner(conf, old);
1448           if (owner != old_pkg) {
1449                /* in case obsolete file no longer belongs to old_pkg */
1450                continue;
1451           }
1452
1453           /* old file is obsolete */
1454           opkg_message(conf, OPKG_INFO,
1455                        "    removing obsolete file %s\n", old);
1456           if (!conf->noaction) {
1457                err = unlink(old);
1458                if (err) {
1459                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1460                                  strerror(errno));
1461                }
1462           }
1463      }
1464
1465      hash_table_deinit(&new_files_table);
1466      pkg_free_installed_files(old_pkg);
1467      pkg_free_installed_files(pkg);
1468
1469      return 0;
1470 }
1471
1472 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1473 {
1474      int i;
1475      int err = 0;
1476      char *globpattern;
1477      glob_t globbuf;
1478      if (0) {
1479           if (!pkg->dest) {
1480                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1481                return -1;
1482           }
1483           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1484           err = glob(globpattern, 0, NULL, &globbuf);
1485           free(globpattern);
1486           if (err) {
1487                return err;
1488           }
1489           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1490           for (i = 0; i < globbuf.gl_pathc; i++) {
1491                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1492                             globbuf.gl_pathv[i], old_pkg->name);
1493                if (!conf->noaction)
1494                     unlink(globbuf.gl_pathv[i]);
1495           }
1496           globfree(&globbuf);
1497      }
1498      return err;
1499 }
1500
1501 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1502 {
1503      int ret;
1504      char *prefix;
1505
1506      if (old_pkg)
1507           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1508      sprintf_alloc(&prefix, "%s.", pkg->name);
1509      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1510                                                         pkg->dest->info_dir,
1511                                                         prefix);
1512      free(prefix);
1513      return ret;
1514 }
1515
1516 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1517 {
1518      /* DPKG_INCOMPATIBILITY:
1519         This is a fairly sophisticated dpkg operation. Shall we
1520         skip it? */
1521
1522      /* Any packages all of whose files have been overwritten during the
1523         installation, and which aren't required for dependencies, are
1524         considered to have been removed. For each such package
1525         1. disappearer's-postrm disappear overwriter overwriter-version
1526         2. The package's maintainer scripts are removed
1527         3. It is noted in the status database as being in a sane state,
1528            namely not installed (any conffiles it may have are ignored,
1529            rather than being removed by dpkg). Note that disappearing
1530            packages do not have their prerm called, because dpkg doesn't
1531            know in advance that the package is going to vanish.
1532      */
1533      return 0;
1534 }
1535
1536 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1537 {
1538      int err;
1539
1540      /* opkg takes a slightly different approach to data file backups
1541         than dpkg. Rather than removing backups at this point, we
1542         actually do the data file installation now. See comments in
1543         check_data_file_clashes() for more details. */
1544
1545      opkg_message(conf, OPKG_INFO,
1546                   "    extracting data files to %s\n", pkg->dest->root_dir);
1547      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1548      if (err) {
1549           return err;
1550      }
1551
1552      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1553         so we can't save ourself from removing important packages
1554         At this point we (should) have extracted the .control file, so it
1555         would be a good idea to reload the data in it, and set the Essential
1556         state in *pkg. From now on the Essential is back in status file and
1557         we can protect again.
1558         We should operate this way:
1559         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1560         check for "Essential" in it
1561         set the value in pkg->essential.
1562         This new routine could be useful also for every other flag
1563         Pigi: 16/03/2004 */
1564      set_flags_from_control(conf, pkg) ;
1565
1566      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1567      err = pkg_write_filelist(conf, pkg);
1568      if (err)
1569           return err;
1570
1571      /* XXX: FEATURE: opkg should identify any files which existed
1572         before installation and which were overwritten, (see
1573         check_data_file_clashes()). What it must do is remove any such
1574         files from the filelist of the old package which provided the
1575         file. Otherwise, if the old package were removed at some point
1576         it would break the new package. Removing the new package will
1577         also break the old one, but this cannot be helped since the old
1578         package's file has already been deleted. This is the importance
1579         of check_data_file_clashes(), and only allowing opkg to install
1580         a clashing package with a user force. */
1581
1582      return 0;
1583 }
1584
1585 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1586 {
1587      conffile_list_elt_t *iter;
1588      conffile_t *cf;
1589      char *cf_backup;
1590      char *md5sum;
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 (md5sum && cf->value && 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               if (md5sum)
1625                   free(md5sum);
1626           }
1627
1628           free(cf_backup);
1629           free(root_filename);
1630      }
1631
1632      return 0;
1633 }
1634
1635 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1636 {
1637      char *response;
1638      const char *short_file_name;
1639
1640      short_file_name = strrchr(file_name, '/');
1641      if (short_file_name) {
1642           short_file_name++;
1643      } else {
1644           short_file_name = file_name;
1645      }
1646
1647      while (1) {
1648           response = get_user_response("    Configuration file '%s'\n"
1649                                        "    ==> File on system created by you or by a script.\n"
1650                                        "    ==> File also in package provided by package maintainer.\n"
1651                                        "       What would you like to do about it ?  Your options are:\n"
1652                                        "        Y or I  : install the package maintainer's version\n"
1653                                        "        N or O  : keep your currently-installed version\n"
1654                                        "          D     : show the differences between the versions (if diff is installed)\n"
1655                                        "     The default action is to keep your current version.\n"
1656                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1657           if (strcmp(response, "y") == 0
1658               || strcmp(response, "i") == 0
1659               || strcmp(response, "yes") == 0) {
1660                free(response);
1661                return 0;
1662           }
1663
1664           if (strcmp(response, "d") == 0) {
1665                char *cmd;
1666
1667                free(response);
1668                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1669                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1670                xsystem(cmd);
1671                free(cmd);
1672                printf("    [Press ENTER to continue]\n");
1673                response = file_read_line_alloc(stdin);
1674                free(response);
1675                continue;
1676           }
1677
1678           free(response);
1679           return 1;
1680      }
1681 }
1682
1683 /* XXX: CLEANUP: I'd like to move all of the code for
1684    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1685    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1686    pkg_deinit for example). */
1687 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1688 {
1689      DIR *tmp_dir;
1690      struct dirent *dirent;
1691      char *tmp_file;
1692
1693 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1694 #error
1695      opkg_message(conf, OPKG_DEBUG,
1696                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1697                   __FUNCTION__, pkg->tmp_unpack_dir);
1698      return 0;
1699 #endif
1700
1701      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1702           tmp_dir = opendir(pkg->tmp_unpack_dir);
1703           if (tmp_dir) {
1704                while (1) {
1705                     dirent = readdir(tmp_dir);
1706                     if (dirent == NULL) {
1707                          break;
1708                     }
1709                     sprintf_alloc(&tmp_file, "%s/%s",
1710                                   pkg->tmp_unpack_dir, dirent->d_name);
1711                     if (! file_is_dir(tmp_file)) {
1712                          unlink(tmp_file);
1713                     }
1714                     free(tmp_file);
1715                }
1716                closedir(tmp_dir);
1717                rmdir(pkg->tmp_unpack_dir);
1718                free(pkg->tmp_unpack_dir);
1719                pkg->tmp_unpack_dir = NULL;
1720           }
1721      }
1722
1723      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1724                   pkg->name, pkg->local_filename, conf->tmp_dir);
1725      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1726           unlink(pkg->local_filename);
1727           free(pkg->local_filename);
1728           pkg->local_filename = NULL;
1729      }
1730
1731      return 0;
1732 }
1733
1734 static char *backup_filename_alloc(const char *file_name)
1735 {
1736      char *backup;
1737
1738      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1739
1740      return backup;
1741 }
1742
1743 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1744 {
1745      int err;
1746      char *backup;
1747
1748      backup = backup_filename_alloc(file_name);
1749      err = file_copy(file_name, backup);
1750      if (err) {
1751           opkg_message(conf, OPKG_ERROR,
1752                        "%s: Failed to copy %s to %s\n",
1753                        __FUNCTION__, file_name, backup);
1754      }
1755
1756      free(backup);
1757
1758      return err;
1759 }
1760
1761 static int backup_exists_for(const char *file_name)
1762 {
1763      int ret;
1764      char *backup;
1765
1766      backup = backup_filename_alloc(file_name);
1767
1768      ret = file_exists(backup);
1769
1770      free(backup);
1771
1772      return ret;
1773 }
1774
1775 static int backup_remove(const char *file_name)
1776 {
1777      char *backup;
1778
1779      backup = backup_filename_alloc(file_name);
1780      unlink(backup);
1781      free(backup);
1782
1783      return 0;
1784 }
1785