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