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 #include "libbb/libbb.h"
  48
  49 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg);
  50 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg);
  51
  52 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  53 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  54 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
  55 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
  56 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  57 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  58 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  59 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  60 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  61 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  62 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  63 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  64 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  65
  66 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  67 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  68 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg);
  69 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg);
  70 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg);
  71
  72 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg);
  73
  74 static int user_prefers_old_conffile(const char *file, const char *backup);
  75
  76 static char *backup_filename_alloc(const char *file_name);
  77 static int backup_make_backup(opkg_conf_t *conf, const char *file_name);
  78 static int backup_exists_for(const char *file_name);
  79 static int backup_remove(const char *file_name);
  80
  81
  82 int opkg_install_from_file(opkg_conf_t *conf, const char *filename)
  83 {
  84      int err, cmp;
  85      pkg_t *pkg, *old;
  86      char *old_version, *new_version;
  87
  88      pkg = pkg_new();
  89
  90      err = pkg_init_from_file(pkg, filename);
  91      if (err) {
  92           return err;
  93      }
  94
  95      if (!pkg->architecture) {
  96           opkg_message(conf, OPKG_ERROR, "Package %s has no Architecture defined.\n", pkg->name);
  97           return -EINVAL;
  98      }
  99
 100      /* XXX: CLEANUP: hash_insert_pkg has a nasty side effect of possibly
 101         freeing the pkg that we pass in. It might be nice to clean this up
 102         if possible.  */
 103      pkg = hash_insert_pkg(&conf->pkg_hash, pkg, 1,conf);
 104      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 105
 106      if (old) {
 107           old_version = pkg_version_str_alloc(old);
 108           new_version = pkg_version_str_alloc(pkg);
 109
 110           cmp = pkg_compare_versions(old, pkg);
 111           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 112              cmp = -1 ;                                       /* then we force opkg to downgrade */
 113                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 114                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 115           }
 116           if (cmp > 0) {
 117                  opkg_message(conf, OPKG_NOTICE,
 118                               "Not downgrading package %s on %s from %s to %s.\n",
 119                               old->name, old->dest->name, old_version, new_version);
 120                  pkg->state_want = SW_DEINSTALL;
 121                  pkg->state_flag |= SF_OBSOLETE;
 122                  free(old_version);
 123                  free(new_version);
 124                  return 0;
 125           } else {
 126                free(old_version);
 127                free(new_version);
 128           }
 129      }
 130
 131      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 132      return opkg_install_pkg(conf, pkg,0);
 133 }
 134
 135 opkg_error_t opkg_install_by_name(opkg_conf_t *conf, const char *pkg_name)
 136 {
 137      int cmp, err = 0;
 138      pkg_t *old, *new;
 139      char *old_version, *new_version;
 140
 141      opkg_message(conf, OPKG_DEBUG2, " Getting old  from pkg_hash_fetch \n" );
 142      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
 143      if ( old )
 144         opkg_message(conf, OPKG_DEBUG2, " Old versions from pkg_hash_fetch %s \n",  old->version );
 145
 146      opkg_message(conf, OPKG_DEBUG2, " Getting new  from pkg_hash_fetch \n" );
 147      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name, &err);
 148      if ( new )
 149         opkg_message(conf, OPKG_DEBUG2, " New versions from pkg_hash_fetch %s \n",  new->version );
 150
 151 /* Pigi Basically here is broken the version stuff.
 152    What's happening is that nothing provide the version to differents
 153    functions, so the returned struct is always the latest.
 154    That's why the install by name don't work.
 155 */
 156      opkg_message(conf, OPKG_DEBUG2, " Versions from pkg_hash_fetch in %s ", __FUNCTION__ );
 157
 158      if ( old )
 159         opkg_message(conf, OPKG_DEBUG2, " old %s ", old->version );
 160      if ( new )
 161         opkg_message(conf, OPKG_DEBUG2, " new %s ", new->version );
 162      opkg_message(conf, OPKG_DEBUG2, " \n");
 163
 164      if (new == NULL) {
 165           if (err)
 166             return err;
 167           else
 168             return OPKG_PKG_HAS_NO_CANDIDATE;
 169      }
 170
 171      new->state_flag |= SF_USER;
 172      if (old) {
 173           old_version = pkg_version_str_alloc(old);
 174           new_version = pkg_version_str_alloc(new);
 175
 176           cmp = pkg_compare_versions(old, new);
 177           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 178              opkg_message(conf, OPKG_DEBUG, " Forcing downgrade \n");
 179              cmp = -1 ;                                       /* then we force opkg to downgrade */
 180                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 181                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 182           }
 183           opkg_message(conf, OPKG_DEBUG,
 184                        "Comparing visible versions of pkg %s:"
 185                        "\n\t%s is installed "
 186                        "\n\t%s is available "
 187                        "\n\t%d was comparison result\n",
 188                        pkg_name, old_version, new_version, cmp);
 189           if (cmp == 0 && !conf->force_reinstall) {
 190                opkg_message(conf, OPKG_NOTICE,
 191                             "Package %s (%s) installed in %s is up to date.\n",
 192                             old->name, old_version, old->dest->name);
 193                free(old_version);
 194                free(new_version);
 195                return 0;
 196           } else if (cmp > 0) {
 197                opkg_message(conf, OPKG_NOTICE,
 198                             "Not downgrading package %s on %s from %s to %s.\n",
 199                             old->name, old->dest->name, old_version, new_version);
 200                free(old_version);
 201                free(new_version);
 202                return 0;
 203           } else if (cmp < 0) {
 204                new->dest = old->dest;
 205                old->state_want = SW_DEINSTALL;    /* Here probably the problem for bug 1277 */
 206           }
 207      }
 208
 209      /* XXX: CLEANUP: The error code of opkg_install_by_name is really
 210         supposed to be an opkg_error_t, but opkg_install_pkg could
 211         return any kind of integer, (might be errno from a syscall,
 212         etc.). This is a real mess and will need to be cleaned up if
 213         anyone ever wants to make a nice libopkg. */
 214
 215      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 216      return opkg_install_pkg(conf, new,0);
 217 }
 218
 219 opkg_error_t opkg_install_multi_by_name(opkg_conf_t *conf, const char *pkg_name)
 220 {
 221      abstract_pkg_vec_t *providers = pkg_hash_fetch_all_installation_candidates (&conf->pkg_hash, pkg_name);
 222      int i;
 223      opkg_error_t err;
 224      abstract_pkg_t *ppkg ;
 225
 226      if (providers == NULL)
 227           return OPKG_PKG_HAS_NO_CANDIDATE;
 228
 229      for (i = 0; i < providers->len; i++) {
 230           ppkg = abstract_pkg_vec_get(providers, i);
 231           opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_by_name %d \n",__FUNCTION__, i);
 232           err = opkg_install_by_name(conf, ppkg->name);
 233           if (err)
 234                return err;
 235 /* XXX Maybe ppkg should be freed ? */
 236      }
 237      return 0;
 238 }
 239
 240 /*
 241  * Walk dependence graph starting with pkg, collect packages to be
 242  * installed into pkgs_needed, in dependence order.
 243  */
 244 int pkg_mark_dependencies_for_installation(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *pkgs_needed)
 245 {
 246      int i, err;
 247      pkg_vec_t *depends = pkg_vec_alloc();
 248      char **unresolved = NULL;
 249      int ndepends;
 250
 251      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 252                                                         pkg, depends,
 253                                                         &unresolved);
 254
 255      if (unresolved) {
 256           opkg_message(conf, OPKG_ERROR,
 257                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 258                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 259           while (*unresolved) {
 260                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 261                unresolved++;
 262           }
 263           opkg_message(conf, OPKG_ERROR, "\n");
 264           if (! conf->force_depends) {
 265                opkg_message(conf, OPKG_INFO,
 266                             "This could mean that your package list is out of date or that the packages\n"
 267                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 268                             "of this problem try again with the '-force-depends' option.\n");
 269                pkg_vec_free(depends);
 270                return OPKG_PKG_DEPS_UNSATISFIED;
 271           }
 272      }
 273
 274      if (ndepends <= 0) {
 275           pkg_vec_free(depends);
 276           return 0;
 277      }
 278
 279      for (i = 0; i < depends->len; i++) {
 280           pkg_t *dep = depends->pkgs[i];
 281           /* The package was uninstalled when we started, but another
 282              dep earlier in this loop may have depended on it and pulled
 283              it in, so check first. */
 284           if ((dep->state_status != SS_INSTALLED)
 285               && (dep->state_status != SS_UNPACKED)
 286               && (dep->state_want != SW_INSTALL)) {
 287
 288                /* Mark packages as to-be-installed */
 289                dep->state_want = SW_INSTALL;
 290
 291                /* Dependencies should be installed the same place as pkg */
 292                if (dep->dest == NULL) {
 293                     dep->dest = pkg->dest;
 294                }
 295
 296                err = pkg_mark_dependencies_for_installation(conf, dep, pkgs_needed);
 297                if (err) {
 298                     pkg_vec_free(depends);
 299                     return err;
 300                }
 301           }
 302      }
 303      if (pkgs_needed)
 304           pkg_vec_insert(pkgs_needed, pkg);
 305
 306      pkg_vec_free(depends);
 307
 308      return 0;
 309 }
 310
 311 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg)
 312 {
 313      int i, err;
 314      pkg_vec_t *depends = pkg_vec_alloc();
 315      pkg_t *dep;
 316      char **unresolved = NULL;
 317      int ndepends;
 318
 319      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 320                                                         pkg, depends,
 321                                                         &unresolved);
 322
 323      if (unresolved) {
 324           opkg_message(conf, OPKG_ERROR,
 325                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 326                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 327           while (*unresolved) {
 328                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 329                unresolved++;
 330           }
 331           opkg_message(conf, OPKG_ERROR, "\n");
 332           if (! conf->force_depends) {
 333                opkg_message(conf, OPKG_INFO,
 334                             "This could mean that your package list is out of date or that the packages\n"
 335                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 336                             "of this problem try again with the '-force-depends' option.\n");
 337                pkg_vec_free(depends);
 338                return OPKG_PKG_DEPS_UNSATISFIED;
 339           }
 340      }
 341
 342      if (ndepends <= 0) {
 343           pkg_vec_free(depends);
 344           return 0;
 345      }
 346
 347      /* Mark packages as to-be-installed */
 348      for (i=0; i < depends->len; i++) {
 349           /* Dependencies should be installed the same place as pkg */
 350           if (depends->pkgs[i]->dest == NULL) {
 351                depends->pkgs[i]->dest = pkg->dest;
 352           }
 353           depends->pkgs[i]->state_want = SW_INSTALL;
 354      }
 355
 356      for (i = 0; i < depends->len; i++) {
 357           dep = depends->pkgs[i];
 358           /* The package was uninstalled when we started, but another
 359              dep earlier in this loop may have depended on it and pulled
 360              it in, so check first. */
 361           if ((dep->state_status != SS_INSTALLED)
 362               && (dep->state_status != SS_UNPACKED)) {
 363                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 364                err = opkg_install_pkg(conf, dep,0);
 365                /* mark this package as having been automatically installed to
 366                 * satisfy a dependancy */
 367                dep->auto_installed = 1;
 368                if (err) {
 369                     pkg_vec_free(depends);
 370                     return err;
 371                }
 372           }
 373      }
 374
 375      pkg_vec_free(depends);
 376
 377      return 0;
 378 }
 379
 380
 381 /* check all packages have their dependences satisfied, e.g., in case an upgraded package split */
 382 int opkg_satisfy_all_dependences(opkg_conf_t *conf)
 383 {
 384      if (conf->nodeps == 0) {
 385           int i;
 386           pkg_vec_t *installed = pkg_vec_alloc();
 387           pkg_hash_fetch_all_installed(&conf->pkg_hash, installed);
 388           for (i = 0; i < installed->len; i++) {
 389                pkg_t *pkg = installed->pkgs[i];
 390                satisfy_dependencies_for(conf, pkg);
 391           }
 392           pkg_vec_free(installed);
 393      }
 394      return 0;
 395 }
 396
 397
 398 static int check_conflicts_for(opkg_conf_t *conf, pkg_t *pkg)
 399 {
 400      int i;
 401      pkg_vec_t *conflicts = NULL;
 402      int level;
 403      const char *prefix;
 404      if (conf->force_depends) {
 405           level = OPKG_NOTICE;
 406           prefix = "Warning";
 407      } else {
 408           level = OPKG_ERROR;
 409           prefix = "ERROR";
 410      }
 411
 412      if (!conf->force_depends)
 413           conflicts = (pkg_vec_t *)pkg_hash_fetch_conflicts(&conf->pkg_hash, pkg);
 414
 415      if (conflicts) {
 416           opkg_message(conf, level,
 417                        "%s: The following packages conflict with %s:\n\t", prefix, pkg->name);
 418           i = 0;
 419           while (i < conflicts->len)
 420                opkg_message(conf, level, " %s", conflicts->pkgs[i++]->name);
 421           opkg_message(conf, level, "\n");
 422           pkg_vec_free(conflicts);
 423           return OPKG_PKG_DEPS_UNSATISFIED;
 424      }
 425      return 0;
 426 }
 427
 428 static int update_file_ownership(opkg_conf_t *conf, pkg_t *new_pkg, pkg_t *old_pkg)
 429 {
 430      str_list_t *new_list = pkg_get_installed_files(new_pkg);
 431      str_list_elt_t *iter, *niter;
 432
 433      for (iter = str_list_first(new_list), niter = str_list_next(new_list, iter);
 434              iter;
 435              iter = niter, niter = str_list_next(new_list, niter)) {
 436           char *new_file = (char *)iter->data;
 437           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
 438           if (!new_file)
 439                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
 440           if (!owner || (owner == old_pkg))
 441                file_hash_set_file_owner(conf, new_file, new_pkg);
 442      }
 443      if (old_pkg) {
 444           str_list_t *old_list = pkg_get_installed_files(old_pkg);
 445           for (iter = str_list_first(old_list), niter = str_list_next(old_list, iter);
 446                   iter;
 447                   iter = niter, niter = str_list_next(old_list, niter)) {
 448                char *old_file = (char *)iter->data;
 449                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
 450                if (owner == old_pkg) {
 451                     /* obsolete */
 452                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
 453                }
 454           }
 455           pkg_free_installed_files(old_pkg);
 456      }
 457      pkg_free_installed_files(new_pkg);
 458      return 0;
 459 }
 460
 461 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
 462 {
 463     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
 464
 465     /* sma 6.20.02:  yup; here's the first bit */
 466     /*
 467      * XXX: BUG easy for cworth
 468      * 1) please point the call below to the correct current root destination
 469      * 2) we need to resolve how to check the required space for a pending pkg,
 470      *    my diddling with the .opk file size below isn't going to cut it.
 471      * 3) return a proper error code instead of 1
 472      */
 473      int comp_size, blocks_available;
 474      char *root_dir;
 475
 476      if (!conf->force_space && pkg->installed_size != NULL) {
 477           root_dir = pkg->dest ? pkg->dest->root_dir : conf->default_dest->root_dir;
 478           blocks_available = get_available_blocks(root_dir);
 479
 480           comp_size = strtoul(pkg->installed_size, NULL, 0);
 481           /* round up a blocks count without doing fancy-but-slow casting jazz */
 482           comp_size = (int)((comp_size + 1023) / 1024);
 483
 484           if (comp_size >= blocks_available) {
 485                opkg_message(conf, OPKG_ERROR,
 486                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n",
 487                             blocks_available, root_dir, pkg->name, comp_size);
 488                return ENOSPC;
 489           }
 490      }
 491      return 0;
 492 }
 493
 494 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
 495 {
 496      int err;
 497      char *conffiles_file_name;
 498      char *root_dir;
 499      FILE *conffiles_file;
 500
 501      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
 502
 503      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
 504      if (pkg->tmp_unpack_dir == NULL) {
 505           opkg_message(conf, OPKG_ERROR,
 506                        "%s: Failed to create temporary directory '%s': %s\n",
 507                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
 508           return errno;
 509      }
 510
 511      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
 512      if (err) {
 513           return err;
 514      }
 515
 516      /* XXX: CLEANUP: There might be a cleaner place to read in the
 517         conffiles. Seems like I should be able to get everything to go
 518         through pkg_init_from_file. If so, maybe it would make sense to
 519         move all of unpack_pkg_control_files to that function. */
 520
 521      /* Don't need to re-read conffiles if we already have it */
 522      if (!nv_pair_list_empty(&pkg->conffiles)) {
 523           return 0;
 524      }
 525
 526      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
 527      if (! file_exists(conffiles_file_name)) {
 528           free(conffiles_file_name);
 529           return 0;
 530      }
 531
 532      conffiles_file = fopen(conffiles_file_name, "r");
 533      if (conffiles_file == NULL) {
 534           fprintf(stderr, "%s: failed to open %s: %s\n",
 535                   __FUNCTION__, conffiles_file_name, strerror(errno));
 536           free(conffiles_file_name);
 537           return errno;
 538      }
 539      free(conffiles_file_name);
 540
 541      while (1) {
 542           char *cf_name;
 543           char *cf_name_in_dest;
 544
 545           cf_name = file_read_line_alloc(conffiles_file);
 546           if (cf_name == NULL) {
 547                break;
 548           }
 549           str_chomp(cf_name);
 550           if (cf_name[0] == '\0') {
 551                continue;
 552           }
 553
 554           /* Prepend dest->root_dir to conffile name.
 555              Take pains to avoid multiple slashes. */
 556           root_dir = pkg->dest->root_dir;
 557           if (conf->offline_root)
 558                /* skip the offline_root prefix */
 559                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
 560           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
 561                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
 562
 563           /* Can't get an md5sum now, (file isn't extracted yet).
 564              We'll wait until resolve_conffiles */
 565           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
 566
 567           free(cf_name);
 568           free(cf_name_in_dest);
 569      }
 570
 571      fclose(conffiles_file);
 572
 573      return 0;
 574 }
 575
 576 static int pkg_remove_orphan_dependent(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
 577 {
 578     int i, j, found;
 579     char *buf, *d_str;
 580     pkg_t *p;
 581
 582     if (!old_pkg)
 583         return 0;
 584
 585     if (old_pkg->depends_count == 0)
 586         return 0;
 587
 588     for (i=0;i<old_pkg->depends_count;i++) {
 589         found = 0;
 590         for (j=0;j<pkg->depends_count;j++) {
 591             if (!strcmp(old_pkg->depends_str[i], pkg->depends_str[j])) {
 592                 found = 1;
 593                 break;
 594             }
 595         }
 596         if (found)
 597             continue;
 598         d_str = old_pkg->depends_str[i];
 599         buf = xcalloc(1, strlen (d_str) + 1);
 600         j=0;
 601         while (d_str[j] != '\0' && d_str[j] != ' ') {
 602             buf[j]=d_str[j];
 603             ++j;
 604         }
 605         buf[j]='\0';
 606         buf = xrealloc (buf, strlen (buf) + 1);
 607         p = pkg_hash_fetch_installed_by_name (&conf->pkg_hash, buf);
 608         if (!p) {
 609             fprintf(stderr, "The pkg %s had been removed!!\n", buf);
 610             free(buf);
 611             continue;
 612         }
 613         if (p->auto_installed) {
 614             int deps;
 615             abstract_pkg_t **dependents;
 616             deps = pkg_has_installed_dependents(conf, NULL, p, &dependents);
 617             if (deps == 0) {
 618                 opkg_message (conf, OPKG_NOTICE,"%s was autoinstalled but is now orphaned, remove it.\n", buf);
 619                 opkg_remove_pkg(conf, p, 0);
 620             } else
 621                 opkg_message (conf, OPKG_INFO, "%s was autoinstalled and is still required by %d installed packages\n", buf, deps);
 622         }
 623         free(buf);
 624     }
 625     return 0;
 626 }
 627
 628 /* returns number of installed replacees */
 629 int pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
 630 {
 631      abstract_pkg_t **replaces = pkg->replaces;
 632      int replaces_count = pkg->replaces_count;
 633      int i, j;
 634      for (i = 0; i < replaces_count; i++) {
 635           abstract_pkg_t *ab_pkg = replaces[i];
 636           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 637           if (pkg_vec) {
 638                for (j = 0; j < pkg_vec->len; j++) {
 639                     pkg_t *replacee = pkg_vec->pkgs[j];
 640                     if (!pkg_conflicts(pkg, replacee))
 641                          continue;
 642                     if (replacee->state_status == SS_INSTALLED) {
 643                          pkg_vec_insert(installed_replacees, replacee);
 644                     }
 645                }
 646           }
 647      }
 648      return installed_replacees->len;
 649 }
 650
 651 int pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
 652 {
 653      int i;
 654      int replaces_count = replacees->len;
 655      for (i = 0; i < replaces_count; i++) {
 656           pkg_t *replacee = replacees->pkgs[i];
 657           int err;
 658           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
 659           err = opkg_remove_pkg(conf, replacee,0);
 660           if (err)
 661                return err;
 662      }
 663      return 0;
 664 }
 665
 666 /* to unwind the removal: make sure they are installed */
 667 int pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
 668 {
 669      int i, err;
 670      int replaces_count = replacees->len;
 671      for (i = 0; i < replaces_count; i++) {
 672           pkg_t *replacee = replacees->pkgs[i];
 673           if (replacee->state_status != SS_INSTALLED) {
 674                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 675                err = opkg_install_pkg(conf, replacee,0);
 676                if (err)
 677                     return err;
 678           }
 679      }
 680      return 0;
 681 }
 682
 683 int caught_sigint = 0;
 684 static void opkg_install_pkg_sigint_handler(int sig)
 685 {
 686      caught_sigint = sig;
 687 }
 688
 689 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
 690 static int opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
 691 {
 692      if (old_pkg) {
 693           char message_out[15];
 694           char *old_version = pkg_version_str_alloc(old_pkg);
 695           char *new_version = pkg_version_str_alloc(pkg);
 696           int cmp = pkg_compare_versions(old_pkg, pkg);
 697           int rc = 0;
 698
 699           memset(message_out,'\x0',15);
 700           strncpy (message_out,"Upgrading ",strlen("Upgrading "));
 701           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 702              cmp = -1 ;                                       /* then we force opkg to downgrade */
 703              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
 704                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 705           }
 706
 707           if (cmp > 0) {
 708                opkg_message(conf, OPKG_NOTICE,
 709                             "Not downgrading package %s on %s from %s to %s.\n",
 710                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
 711                rc = 1;
 712           } else if (cmp < 0) {
 713                opkg_message(conf, OPKG_NOTICE,
 714                             "%s%s on %s from %s to %s...\n",
 715                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
 716                pkg->dest = old_pkg->dest;
 717                rc = 0;
 718           } else /* cmp == 0 */ {
 719                if (conf->force_reinstall) {
 720                     opkg_message(conf, OPKG_NOTICE,
 721                                  "Reinstalling %s (%s) on %s...\n",
 722                                  pkg->name, new_version, old_pkg->dest->name);
 723                     pkg->dest = old_pkg->dest;
 724                     rc = 0;
 725                } else {
 726                     opkg_message(conf, OPKG_NOTICE,
 727                                  "Not installing %s (%s) on %s -- already installed.\n",
 728                                  pkg->name, new_version, old_pkg->dest->name);
 729                     rc = 1;
 730                }
 731           }
 732           free(old_version);
 733           free(new_version);
 734           return rc;
 735      } else {
 736       char message_out[15] ;
 737       memset(message_out,'\x0',15);
 738       if ( message )
 739           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
 740       else
 741           strncpy( message_out,"Installing ",strlen("Installing ") );
 742           char *version = pkg_version_str_alloc(pkg);
 743
 744           opkg_message(conf, OPKG_NOTICE,
 745                        "%s%s (%s) to %s...\n", message_out,
 746                        pkg->name, version, pkg->dest->name);
 747           free(version);
 748           return 0;
 749      }
 750 }
 751
 752 /**
 753  *  @brief Really install a pkg_t
 754  */
 755 int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
 756 {
 757      int err = 0;
 758      int message = 0;
 759      pkg_t *old_pkg = NULL;
 760      pkg_vec_t *replacees;
 761      abstract_pkg_t *ab_pkg = NULL;
 762      int old_state_flag;
 763      char* file_md5;
 764 #ifdef HAVE_SHA256
 765      char* file_sha256;
 766 #endif
 767
 768      if ( from_upgrade )
 769         message = 1;            /* Coming from an upgrade, and should change the output message */
 770
 771      if (!pkg) {
 772           opkg_message(conf, OPKG_ERROR,
 773                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
 774           return OPKG_INSTALL_ERR_INTERNAL;
 775      }
 776
 777      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
 778
 779      if (!pkg_arch_supported(conf, pkg)) {
 780           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
 781                        pkg->architecture, pkg->name);
 782           return OPKG_INSTALL_ERR_INTERNAL;
 783      }
 784      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
 785           err = satisfy_dependencies_for(conf, pkg);
 786           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 787
 788           opkg_message(conf, OPKG_NOTICE,
 789                        "Package %s is already installed in %s.\n",
 790                        pkg->name, pkg->dest->name);
 791           return 0;
 792      }
 793
 794      if (pkg->dest == NULL) {
 795           pkg->dest = conf->default_dest;
 796      }
 797
 798      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 799
 800      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
 801      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
 802
 803      pkg->state_want = SW_INSTALL;
 804      if (old_pkg){
 805          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
 806      }
 807
 808
 809      /* Abhaya: conflicts check */
 810      err = check_conflicts_for(conf, pkg);
 811      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
 812
 813      /* this setup is to remove the upgrade scenario in the end when
 814         installing pkg A, A deps B & B deps on A. So both B and A are
 815         installed. Then A's installation is started resulting in an
 816         uncecessary upgrade */
 817      if (pkg->state_status == SS_INSTALLED
 818          && conf->force_reinstall == 0) return 0;
 819
 820      err = verify_pkg_installable(conf, pkg);
 821      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
 822
 823      if (pkg->local_filename == NULL) {
 824           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
 825           if (err) {
 826                opkg_message(conf, OPKG_ERROR,
 827                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
 828                             pkg->name);
 829                return OPKG_INSTALL_ERR_DOWNLOAD;
 830           }
 831      }
 832
 833      /* check that the repository is valid */
 834      #if defined(HAVE_GPGME) || defined(HAVE_OPENSSL)
 835      char *list_file_name, *sig_file_name, *lists_dir;
 836
 837      /* check to ensure the package has come from a repository */
 838      if (conf->check_signature && pkg->src)
 839      {
 840        sprintf_alloc (&lists_dir, "%s",
 841                      (conf->restrict_to_default_dest)
 842                       ? conf->default_dest->lists_dir
 843                       : conf->lists_dir);
 844        sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
 845        sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
 846
 847        if (file_exists (sig_file_name))
 848        {
 849          if (opkg_verify_file (conf, list_file_name, sig_file_name)){
 850            opkg_message(conf, OPKG_ERROR, "Failed to verify the signature of: %s\n",
 851                            list_file_name);
 852            return OPKG_INSTALL_ERR_SIGNATURE;
 853          }
 854        }else{
 855          opkg_message(conf, OPKG_ERROR, "Signature file is missing. "
 856                          "Perhaps you need to run 'opkg update'?\n");
 857          return OPKG_INSTALL_ERR_SIGNATURE;
 858        }
 859
 860        free (lists_dir);
 861        free (list_file_name);
 862        free (sig_file_name);
 863      }
 864      #endif
 865
 866      /* Check for md5 values */
 867      if (pkg->md5sum)
 868      {
 869          file_md5 = file_md5sum_alloc(pkg->local_filename);
 870          if (file_md5 && strcmp(file_md5, pkg->md5sum))
 871          {
 872               opkg_message(conf, OPKG_ERROR,
 873                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 874                            pkg->name);
 875               free(file_md5);
 876               return OPKG_INSTALL_ERR_MD5;
 877          }
 878          if (file_md5)
 879               free(file_md5);
 880      }
 881
 882 #ifdef HAVE_SHA256
 883      /* Check for sha256 value */
 884      if(pkg->sha256sum)
 885      {
 886          file_sha256 = file_sha256sum_alloc(pkg->local_filename);
 887          if (file_sha256 && strcmp(file_sha256, pkg->sha256sum))
 888          {
 889               opkg_message(conf, OPKG_ERROR,
 890                            "Package %s sha256sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 891                            pkg->name);
 892               free(file_sha256);
 893               return OPKG_INSTALL_ERR_SHA256;
 894          }
 895          if (file_sha256)
 896               free(file_sha256);
 897      }
 898 #endif
 899
 900      if (pkg->tmp_unpack_dir == NULL) {
 901           unpack_pkg_control_files(conf, pkg);
 902      }
 903
 904      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 905 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 906 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 907      err = update_file_ownership(conf, pkg, old_pkg);
 908      if (err) { return OPKG_ERR_UNKNOWN; }
 909
 910      if (conf->nodeps == 0) {
 911           err = satisfy_dependencies_for(conf, pkg);
 912           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 913      }
 914
 915      replacees = pkg_vec_alloc();
 916      pkg_get_installed_replacees(conf, pkg, replacees);
 917
 918      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 919      {
 920           sigset_t newset, oldset;
 921           sighandler_t old_handler = NULL;
 922           int use_signal = 0;
 923           caught_sigint = 0;
 924           if (use_signal) {
 925                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 926           } else {
 927                sigemptyset(&newset);
 928                sigaddset(&newset, SIGINT);
 929                sigprocmask(SIG_BLOCK, &newset, &oldset);
 930           }
 931
 932           opkg_state_changed++;
 933           pkg->state_flag |= SF_FILELIST_CHANGED;
 934
 935           pkg_remove_orphan_dependent(conf, pkg, old_pkg);
 936
 937           /* XXX: BUG: we really should treat replacement more like an upgrade
 938            *      Instead, we're going to remove the replacees
 939            */
 940           err = pkg_remove_installed_replacees(conf, replacees);
 941           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 942
 943           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 944           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 945
 946           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 947           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 948
 949           err = preinst_configure(conf, pkg, old_pkg);
 950           if (err) goto UNWIND_PREINST_CONFIGURE;
 951
 952           err = backup_modified_conffiles(conf, pkg, old_pkg);
 953           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 954
 955           err = check_data_file_clashes(conf, pkg, old_pkg);
 956           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 957
 958           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 959           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 960
 961           if (conf->noaction) return 0;
 962
 963           /* point of no return: no unwinding after this */
 964           if (old_pkg && !conf->force_reinstall) {
 965                old_pkg->state_want = SW_DEINSTALL;
 966
 967                if (old_pkg->state_flag & SF_NOPRUNE) {
 968                     opkg_message(conf, OPKG_INFO,
 969                                  "  not removing obsolesced files because package marked noprune\n");
 970                } else {
 971                     opkg_message(conf, OPKG_INFO,
 972                                  "  removing obsolesced files\n");
 973                     remove_obsolesced_files(conf, pkg, old_pkg);
 974                }
 975                /* removing files from old package, to avoid ghost files */
 976                remove_data_files_and_list(conf, old_pkg);
 977 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 978                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 979                remove_postrm(conf, old_pkg);
 980 /* Pigi */
 981
 982           }
 983
 984
 985           opkg_message(conf, OPKG_INFO,
 986                        "  installing maintainer scripts\n");
 987           install_maintainer_scripts(conf, pkg, old_pkg);
 988
 989           /* the following just returns 0 */
 990           remove_disappeared(conf, pkg);
 991
 992           opkg_message(conf, OPKG_INFO,
 993                        "  installing data files\n");
 994           install_data_files(conf, pkg);
 995
 996 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
 997           err = check_data_file_clashes_change(conf, pkg, old_pkg);
 998
 999           opkg_message(conf, OPKG_INFO,
1000                        "  resolving conf files\n");
1001           resolve_conffiles(conf, pkg);
1002
1003           pkg->state_status = SS_UNPACKED;
1004           old_state_flag = pkg->state_flag;
1005           pkg->state_flag &= ~SF_PREFER;
1006           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
1007
1008           if (old_pkg && !conf->force_reinstall) {
1009                old_pkg->state_status = SS_NOT_INSTALLED;
1010           }
1011
1012           time(&pkg->installed_time);
1013
1014           opkg_message(conf, OPKG_INFO,
1015                        "  cleanup temp files\n");
1016           cleanup_temporary_files(conf, pkg);
1017
1018           ab_pkg = pkg->parent;
1019           if (ab_pkg)
1020                ab_pkg->state_status = pkg->state_status;
1021
1022           opkg_message(conf, OPKG_INFO, "Done.\n");
1023
1024           if (use_signal)
1025                signal(SIGINT, old_handler);
1026           else
1027                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1028           pkg_vec_free (replacees);
1029           return 0;
1030
1031
1032      UNWIND_POSTRM_UPGRADE_OLD_PKG:
1033           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1034      UNWIND_CHECK_DATA_FILE_CLASHES:
1035           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1036      UNWIND_BACKUP_MODIFIED_CONFFILES:
1037           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1038      UNWIND_PREINST_CONFIGURE:
1039           preinst_configure_unwind(conf, pkg, old_pkg);
1040      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1041           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1042      UNWIND_PRERM_UPGRADE_OLD_PKG:
1043           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1044      UNWIND_REMOVE_INSTALLED_REPLACEES:
1045           pkg_remove_installed_replacees_unwind(conf, replacees);
1046
1047           opkg_message(conf, OPKG_INFO,
1048                        "  cleanup temp files\n");
1049           cleanup_temporary_files(conf, pkg);
1050
1051           opkg_message(conf, OPKG_INFO,
1052                        "Failed.\n");
1053           if (use_signal)
1054                signal(SIGINT, old_handler);
1055           else
1056                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1057
1058           pkg_vec_free (replacees);
1059           return OPKG_ERR_UNKNOWN;
1060      }
1061 }
1062
1063 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1064 {
1065      /* DPKG_INCOMPATIBILITY:
1066         dpkg does some things here that we don't do yet. Do we care?
1067
1068         1. If a version of the package is already installed, call
1069            old-prerm upgrade new-version
1070         2. If the script runs but exits with a non-zero exit status
1071            new-prerm failed-upgrade old-version
1072            Error unwind, for both the above cases:
1073            old-postinst abort-upgrade new-version
1074      */
1075      return 0;
1076 }
1077
1078 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1079 {
1080      /* DPKG_INCOMPATIBILITY:
1081         dpkg does some things here that we don't do yet. Do we care?
1082         (See prerm_upgrade_old_package for details)
1083      */
1084      return 0;
1085 }
1086
1087 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1088 {
1089      /* DPKG_INCOMPATIBILITY:
1090         dpkg does some things here that we don't do yet. Do we care?
1091         2. If a 'conflicting' package is being removed at the same time:
1092                 1. If any packages depended on that conflicting package and
1093                    --auto-deconfigure is specified, call, for each such package:
1094                    deconfigured's-prerm deconfigure \
1095                    in-favour package-being-installed version \
1096                    removing conflicting-package version
1097                 Error unwind:
1098                    deconfigured's-postinst abort-deconfigure \
1099                    in-favour package-being-installed-but-failed version \
1100                    removing conflicting-package version
1101
1102                    The deconfigured packages are marked as requiring
1103                    configuration, so that if --install is used they will be
1104                    configured again if possible.
1105                 2. To prepare for removal of the conflicting package, call:
1106                    conflictor's-prerm remove in-favour package new-version
1107                 Error unwind:
1108                    conflictor's-postinst abort-remove in-favour package new-version
1109      */
1110      return 0;
1111 }
1112
1113 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1114 {
1115      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1116         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1117         details) */
1118      return 0;
1119 }
1120
1121 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1122 {
1123      int err;
1124      char *preinst_args;
1125
1126      if (old_pkg) {
1127           char *old_version = pkg_version_str_alloc(old_pkg);
1128           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1129           free(old_version);
1130      } else if (pkg->state_status == SS_CONFIG_FILES) {
1131           char *pkg_version = pkg_version_str_alloc(pkg);
1132           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1133           free(pkg_version);
1134      } else {
1135           preinst_args = xstrdup("install");
1136      }
1137
1138      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1139      if (err) {
1140           opkg_message(conf, OPKG_ERROR,
1141                        "Aborting installation of %s\n", pkg->name);
1142           return 1;
1143      }
1144
1145      free(preinst_args);
1146
1147      return 0;
1148 }
1149
1150 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1151 {
1152      /* DPKG_INCOMPATIBILITY:
1153         dpkg does the following error unwind, should we?
1154         pkg->postrm abort-upgrade old-version
1155         OR pkg->postrm abort-install old-version
1156         OR pkg->postrm abort-install
1157      */
1158      return 0;
1159 }
1160
1161 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1162 {
1163      int err;
1164      conffile_list_elt_t *iter;
1165      conffile_t *cf;
1166
1167      if (conf->noaction) return 0;
1168
1169      /* Backup all modified conffiles */
1170      if (old_pkg) {
1171           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1172                char *cf_name;
1173
1174                cf = iter->data;
1175                cf_name = root_filename_alloc(conf, cf->name);
1176
1177                /* Don't worry if the conffile is just plain gone */
1178                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1179                     err = backup_make_backup(conf, cf_name);
1180                     if (err) {
1181                          return err;
1182                     }
1183                }
1184                free(cf_name);
1185           }
1186      }
1187
1188      /* Backup all conffiles that were not conffiles in old_pkg */
1189      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1190           char *cf_name;
1191           cf = (conffile_t *)iter->data;
1192           cf_name = root_filename_alloc(conf, cf->name);
1193           /* Ignore if this was a conffile in old_pkg as well */
1194           if (pkg_get_conffile(old_pkg, cf->name)) {
1195                continue;
1196           }
1197
1198           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1199                err = backup_make_backup(conf, cf_name);
1200                if (err) {
1201                     return err;
1202                }
1203           }
1204           free(cf_name);
1205      }
1206
1207      return 0;
1208 }
1209
1210 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1211 {
1212      conffile_list_elt_t *iter;
1213
1214      if (old_pkg) {
1215           for (iter = nv_pair_list_first(&old_pkg->conffiles); iter; iter = nv_pair_list_next(&old_pkg->conffiles, iter)) {
1216                backup_remove(((nv_pair_t *)iter->data)->name);
1217           }
1218      }
1219
1220      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1221           backup_remove(((nv_pair_t *)iter->data)->name);
1222      }
1223
1224      return 0;
1225 }
1226
1227
1228 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1229 {
1230      /* DPKG_INCOMPATIBILITY:
1231         opkg takes a slightly different approach than dpkg at this
1232         point.  dpkg installs each file in the new package while
1233         creating a backup for any file that is replaced, (so that it
1234         can unwind if necessary).  To avoid complexity and redundant
1235         storage, opkg doesn't do any installation until later, (at the
1236         point at which dpkg removes the backups.
1237
1238         But, we do have to check for data file clashes, since after
1239         installing a package with a file clash, removing either of the
1240         packages involved in the clash has the potential to break the
1241         other package.
1242      */
1243      str_list_t *files_list;
1244      str_list_elt_t *iter, *niter;
1245
1246      int clashes = 0;
1247
1248      files_list = pkg_get_installed_files(pkg);
1249      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1250              iter;
1251              iter = niter, niter = str_list_next(files_list, iter)) {
1252           char *root_filename;
1253           char *filename = (char *) iter->data;
1254           root_filename = root_filename_alloc(conf, filename);
1255           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1256                pkg_t *owner;
1257                pkg_t *obs;
1258                /* Pre-existing conffiles are OK */
1259                /* @@@@ should have way to check that it is a conffile -Jamey */
1260                if (backup_exists_for(root_filename)) {
1261                     continue;
1262                }
1263
1264                /* Pre-existing files are OK if force-overwrite was asserted. */
1265                if (conf->force_overwrite) {
1266                     /* but we need to change who owns this file */
1267                     file_hash_set_file_owner(conf, filename, pkg);
1268                     continue;
1269                }
1270
1271                owner = file_hash_get_file_owner(conf, filename);
1272
1273                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1274                if (owner && old_pkg) {
1275                     if (strcmp(owner->name, old_pkg->name) == 0) {
1276                          continue;
1277                     }
1278                }
1279
1280                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1281                if (owner) {
1282                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1283                     if (pkg_replaces(pkg, owner)) {
1284                          continue;
1285                     }
1286 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1287    then it's ok to overwrite. */
1288                     if (strcmp(owner->name,pkg->name)==0){
1289                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1290                          continue;
1291                     }
1292                }
1293
1294                /* Pre-existing files are OK if they are obsolete */
1295                obs = hash_table_get(&conf->obs_file_hash, filename);
1296                if (obs) {
1297                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1298                     continue;
1299                }
1300
1301                /* We have found a clash. */
1302                opkg_message(conf, OPKG_ERROR,
1303                             "Package %s wants to install file %s\n"
1304                             "\tBut that file is already provided by package ",
1305                             pkg->name, filename);
1306                if (owner) {
1307                     opkg_message(conf, OPKG_ERROR,
1308                                  "%s\n", owner->name);
1309                } else {
1310                     opkg_message(conf, OPKG_ERROR,
1311                                  "<no package>\nPlease move this file out of the way and try again.\n");
1312                }
1313                clashes++;
1314           }
1315           free(root_filename);
1316      }
1317      pkg_free_installed_files(pkg);
1318
1319      return clashes;
1320 }
1321
1322 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1323 {
1324     /* Basically that's the worst hack I could do to be able to change ownership of
1325        file list, but, being that we have no way to unwind the mods, due to structure
1326        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1327        What we do here is change the ownership of file in hash if a replace ( or similar events
1328        happens )
1329        Only the action that are needed to change name should be considered.
1330        @@@ To change after 1.0 release.
1331      */
1332      str_list_t *files_list;
1333      str_list_elt_t *iter, *niter;
1334
1335      char *root_filename = NULL;
1336
1337      int clashes = 0;
1338
1339      files_list = pkg_get_installed_files(pkg);
1340      for (iter = str_list_first(files_list), niter = str_list_next(files_list, iter);
1341              iter;
1342              iter = niter, niter = str_list_next(files_list, niter)) {
1343           char *filename = (char *) iter->data;
1344           if (root_filename) {
1345               free(root_filename);
1346               root_filename = NULL;
1347           }
1348           root_filename = root_filename_alloc(conf, filename);
1349           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1350                pkg_t *owner;
1351
1352                owner = file_hash_get_file_owner(conf, filename);
1353
1354                if (conf->force_overwrite) {
1355                     /* but we need to change who owns this file */
1356                     file_hash_set_file_owner(conf, filename, pkg);
1357                     continue;
1358                }
1359
1360
1361                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1362                if (owner) {
1363                     if (pkg_replaces(pkg, owner)) {
1364 /* It's now time to change the owner of that file.
1365    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1366                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1367                          file_hash_set_file_owner(conf, filename, pkg);
1368                          continue;
1369                     }
1370                }
1371
1372           }
1373      }
1374      if (root_filename) {
1375          free(root_filename);
1376          root_filename = NULL;
1377      }
1378      pkg_free_installed_files(pkg);
1379
1380      return clashes;
1381 }
1382
1383 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1384 {
1385      /* Nothing to do since check_data_file_clashes doesn't change state */
1386      return 0;
1387 }
1388
1389 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1390 {
1391      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1392         1. If the package is being upgraded, call
1393            old-postrm upgrade new-version
1394         2. If this fails, attempt:
1395            new-postrm failed-upgrade old-version
1396         Error unwind, for both cases:
1397            old-preinst abort-upgrade new-version    */
1398      return 0;
1399 }
1400
1401 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1402 {
1403      /* DPKG_INCOMPATIBILITY:
1404         dpkg does some things here that we don't do yet. Do we care?
1405         (See postrm_upgrade_old_pkg for details)
1406      */
1407     return 0;
1408 }
1409
1410 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1411 {
1412      int err;
1413      str_list_t *old_files;
1414      str_list_elt_t *of;
1415      str_list_t *new_files;
1416      str_list_elt_t *nf;
1417      hash_table_t new_files_table;
1418
1419      if (old_pkg == NULL) {
1420           return 0;
1421      }
1422
1423      old_files = pkg_get_installed_files(old_pkg);
1424      new_files = pkg_get_installed_files(pkg);
1425
1426      new_files_table.entries = NULL;
1427      hash_table_init("new_files" , &new_files_table, 20);
1428      for (nf = str_list_first(new_files); nf; nf = str_list_next(new_files, nf)) {
1429          if (nf && nf->data)
1430             hash_table_insert(&new_files_table, nf->data, nf->data);
1431      }
1432
1433      for (of = str_list_first(old_files); of; of = str_list_next(old_files, of)) {
1434           pkg_t *owner;
1435           char *old, *new;
1436           old = (char *)of->data;
1437           new = (char *) hash_table_get (&new_files_table, old);
1438           if (new)
1439                continue;
1440
1441           if (file_is_dir(old)) {
1442                continue;
1443           }
1444           owner = file_hash_get_file_owner(conf, old);
1445           if (owner != old_pkg) {
1446                /* in case obsolete file no longer belongs to old_pkg */
1447                continue;
1448           }
1449
1450           /* old file is obsolete */
1451           opkg_message(conf, OPKG_INFO,
1452                        "    removing obsolete file %s\n", old);
1453           if (!conf->noaction) {
1454                err = unlink(old);
1455                if (err) {
1456                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1457                                  strerror(errno));
1458                }
1459           }
1460      }
1461
1462      hash_table_deinit(&new_files_table);
1463      pkg_free_installed_files(old_pkg);
1464      pkg_free_installed_files(pkg);
1465
1466      return 0;
1467 }
1468
1469 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1470 {
1471      int ret;
1472      char *prefix;
1473
1474      sprintf_alloc(&prefix, "%s.", pkg->name);
1475      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1476                                                         pkg->dest->info_dir,
1477                                                         prefix);
1478      free(prefix);
1479      return ret;
1480 }
1481
1482 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1483 {
1484      /* DPKG_INCOMPATIBILITY:
1485         This is a fairly sophisticated dpkg operation. Shall we
1486         skip it? */
1487
1488      /* Any packages all of whose files have been overwritten during the
1489         installation, and which aren't required for dependencies, are
1490         considered to have been removed. For each such package
1491         1. disappearer's-postrm disappear overwriter overwriter-version
1492         2. The package's maintainer scripts are removed
1493         3. It is noted in the status database as being in a sane state,
1494            namely not installed (any conffiles it may have are ignored,
1495            rather than being removed by dpkg). Note that disappearing
1496            packages do not have their prerm called, because dpkg doesn't
1497            know in advance that the package is going to vanish.
1498      */
1499      return 0;
1500 }
1501
1502 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1503 {
1504      int err;
1505
1506      /* opkg takes a slightly different approach to data file backups
1507         than dpkg. Rather than removing backups at this point, we
1508         actually do the data file installation now. See comments in
1509         check_data_file_clashes() for more details. */
1510
1511      opkg_message(conf, OPKG_INFO,
1512                   "    extracting data files to %s\n", pkg->dest->root_dir);
1513      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1514      if (err) {
1515           return err;
1516      }
1517
1518      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1519         so we can't save ourself from removing important packages
1520         At this point we (should) have extracted the .control file, so it
1521         would be a good idea to reload the data in it, and set the Essential
1522         state in *pkg. From now on the Essential is back in status file and
1523         we can protect again.
1524         We should operate this way:
1525         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1526         check for "Essential" in it
1527         set the value in pkg->essential.
1528         This new routine could be useful also for every other flag
1529         Pigi: 16/03/2004 */
1530      set_flags_from_control(conf, pkg) ;
1531
1532      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1533      err = pkg_write_filelist(conf, pkg);
1534      if (err)
1535           return err;
1536
1537      /* XXX: FEATURE: opkg should identify any files which existed
1538         before installation and which were overwritten, (see
1539         check_data_file_clashes()). What it must do is remove any such
1540         files from the filelist of the old package which provided the
1541         file. Otherwise, if the old package were removed at some point
1542         it would break the new package. Removing the new package will
1543         also break the old one, but this cannot be helped since the old
1544         package's file has already been deleted. This is the importance
1545         of check_data_file_clashes(), and only allowing opkg to install
1546         a clashing package with a user force. */
1547
1548      return 0;
1549 }
1550
1551 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1552 {
1553      conffile_list_elt_t *iter;
1554      conffile_t *cf;
1555      char *cf_backup;
1556      char *md5sum;
1557
1558      if (conf->noaction) return 0;
1559
1560      for (iter = nv_pair_list_first(&pkg->conffiles); iter; iter = nv_pair_list_next(&pkg->conffiles, iter)) {
1561           char *root_filename;
1562           cf = (conffile_t *)iter->data;
1563           root_filename = root_filename_alloc(conf, cf->name);
1564
1565           /* Might need to initialize the md5sum for each conffile */
1566           if (cf->value == NULL) {
1567                cf->value = file_md5sum_alloc(root_filename);
1568           }
1569
1570           if (!file_exists(root_filename)) {
1571                free(root_filename);
1572                continue;
1573           }
1574
1575           cf_backup = backup_filename_alloc(root_filename);
1576
1577
1578           if (file_exists(cf_backup)) {
1579               /* Let's compute md5 to test if files are changed */
1580               md5sum = file_md5sum_alloc(cf_backup);
1581               if (md5sum && cf->value && strcmp(cf->value,md5sum) != 0 ) {
1582                   if (conf->force_maintainer) {
1583                       opkg_message(conf, OPKG_NOTICE, "Conffile %s using maintainer's setting.\n", cf_backup);
1584                   } else if (conf->force_defaults
1585                           || user_prefers_old_conffile(cf->name, cf_backup) ) {
1586                       rename(cf_backup, root_filename);
1587                   }
1588               }
1589               unlink(cf_backup);
1590               if (md5sum)
1591                   free(md5sum);
1592           }
1593
1594           free(cf_backup);
1595           free(root_filename);
1596      }
1597
1598      return 0;
1599 }
1600
1601 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1602 {
1603      char *response;
1604      const char *short_file_name;
1605
1606      short_file_name = strrchr(file_name, '/');
1607      if (short_file_name) {
1608           short_file_name++;
1609      } else {
1610           short_file_name = file_name;
1611      }
1612
1613      while (1) {
1614           response = get_user_response("    Configuration file '%s'\n"
1615                                        "    ==> File on system created by you or by a script.\n"
1616                                        "    ==> File also in package provided by package maintainer.\n"
1617                                        "       What would you like to do about it ?  Your options are:\n"
1618                                        "        Y or I  : install the package maintainer's version\n"
1619                                        "        N or O  : keep your currently-installed version\n"
1620                                        "          D     : show the differences between the versions (if diff is installed)\n"
1621                                        "     The default action is to keep your current version.\n"
1622                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1623           if (strcmp(response, "y") == 0
1624               || strcmp(response, "i") == 0
1625               || strcmp(response, "yes") == 0) {
1626                free(response);
1627                return 0;
1628           }
1629
1630           if (strcmp(response, "d") == 0) {
1631                char *cmd;
1632
1633                free(response);
1634                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1635                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1636                xsystem(cmd);
1637                free(cmd);
1638                printf("    [Press ENTER to continue]\n");
1639                response = file_read_line_alloc(stdin);
1640                free(response);
1641                continue;
1642           }
1643
1644           free(response);
1645           return 1;
1646      }
1647 }
1648
1649 /* XXX: CLEANUP: I'd like to move all of the code for
1650    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1651    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1652    pkg_deinit for example). */
1653 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1654 {
1655      DIR *tmp_dir;
1656      struct dirent *dirent;
1657      char *tmp_file;
1658
1659 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1660 #error
1661      opkg_message(conf, OPKG_DEBUG,
1662                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1663                   __FUNCTION__, pkg->tmp_unpack_dir);
1664      return 0;
1665 #endif
1666
1667      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1668           tmp_dir = opendir(pkg->tmp_unpack_dir);
1669           if (tmp_dir) {
1670                while (1) {
1671                     dirent = readdir(tmp_dir);
1672                     if (dirent == NULL) {
1673                          break;
1674                     }
1675                     sprintf_alloc(&tmp_file, "%s/%s",
1676                                   pkg->tmp_unpack_dir, dirent->d_name);
1677                     if (! file_is_dir(tmp_file)) {
1678                          unlink(tmp_file);
1679                     }
1680                     free(tmp_file);
1681                }
1682                closedir(tmp_dir);
1683                rmdir(pkg->tmp_unpack_dir);
1684                free(pkg->tmp_unpack_dir);
1685                pkg->tmp_unpack_dir = NULL;
1686           }
1687      }
1688
1689      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1690                   pkg->name, pkg->local_filename, conf->tmp_dir);
1691      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1692           unlink(pkg->local_filename);
1693           free(pkg->local_filename);
1694           pkg->local_filename = NULL;
1695      }
1696
1697      return 0;
1698 }
1699
1700 static char *backup_filename_alloc(const char *file_name)
1701 {
1702      char *backup;
1703
1704      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1705
1706      return backup;
1707 }
1708
1709 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1710 {
1711      int err;
1712      char *backup;
1713
1714      backup = backup_filename_alloc(file_name);
1715      err = file_copy(file_name, backup);
1716      if (err) {
1717           opkg_message(conf, OPKG_ERROR,
1718                        "%s: Failed to copy %s to %s\n",
1719                        __FUNCTION__, file_name, backup);
1720      }
1721
1722      free(backup);
1723
1724      return err;
1725 }
1726
1727 static int backup_exists_for(const char *file_name)
1728 {
1729      int ret;
1730      char *backup;
1731
1732      backup = backup_filename_alloc(file_name);
1733
1734      ret = file_exists(backup);
1735
1736      free(backup);
1737
1738      return ret;
1739 }
1740
1741 static int backup_remove(const char *file_name)
1742 {
1743      char *backup;
1744
1745      backup = backup_filename_alloc(file_name);
1746      unlink(backup);
1747      free(backup);
1748
1749      return 0;
1750 }
1751