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 typedef void (*sighandler_t)(int);
  25
  26 #include "pkg.h"
  27 #include "pkg_hash.h"
  28 #include "pkg_extract.h"
  29
  30 #include "opkg_install.h"
  31 #include "opkg_configure.h"
  32 #include "opkg_download.h"
  33 #include "opkg_remove.h"
  34
  35 #include "opkg_utils.h"
  36 #include "opkg_message.h"
  37 #include "opkg_state.h"
  38 #include "opkg_defines.h"
  39
  40 #include "sprintf_alloc.h"
  41 #include "file_util.h"
  42 #include "str_util.h"
  43 #include "xsystem.h"
  44 #include "user.h"
  45
  46 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg);
  47 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg);
  48 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg);
  49
  50 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  51 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  52 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
  53 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors);
  54 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  55 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  56 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  57 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  58 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  59 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  60 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  61 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  62 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  63
  64 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  65 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg);
  66 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg);
  67 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg);
  68 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg);
  69
  70 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg);
  71
  72 static int user_prefers_old_conffile(const char *file, const char *backup);
  73
  74 static char *backup_filename_alloc(const char *file_name);
  75 static int backup_make_backup(opkg_conf_t *conf, const char *file_name);
  76 static int backup_exists_for(const char *file_name);
  77 static int backup_remove(const char *file_name);
  78
  79
  80 int opkg_install_from_file(opkg_conf_t *conf, const char *filename)
  81 {
  82      int err, cmp;
  83      pkg_t *pkg, *old;
  84      char *old_version, *new_version;
  85
  86      pkg = pkg_new();
  87      if (pkg == NULL) {
  88           return ENOMEM;
  89      }
  90
  91      err = pkg_init_from_file(pkg, filename);
  92      if (err) {
  93           return err;
  94      }
  95
  96      if (!pkg->architecture) {
  97           opkg_message(conf, OPKG_ERROR, "Package %s has no Architecture defined.\n", pkg->name);
  98           return -EINVAL;
  99      }
 100
 101      /* XXX: CLEANUP: hash_insert_pkg has a nasty side effect of possibly
 102         freeing the pkg that we pass in. It might be nice to clean this up
 103         if possible.  */
 104      pkg = hash_insert_pkg(&conf->pkg_hash, pkg, 1,conf);
 105      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 106
 107      pkg->local_filename = strdup(filename);
 108
 109      if (old) {
 110           old_version = pkg_version_str_alloc(old);
 111           new_version = pkg_version_str_alloc(pkg);
 112
 113           cmp = pkg_compare_versions(old, pkg);
 114           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 115              cmp = -1 ;                                       /* then we force opkg to downgrade */
 116                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 117                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 118           }
 119           if (cmp > 0) {
 120                  opkg_message(conf, OPKG_NOTICE,
 121                               "Not downgrading package %s on %s from %s to %s.\n",
 122                               old->name, old->dest->name, old_version, new_version);
 123                  pkg->state_want = SW_DEINSTALL;
 124                  pkg->state_flag |= SF_OBSOLETE;
 125                  free(old_version);
 126                  free(new_version);
 127                  return 0;
 128           } else {
 129                free(old_version);
 130                free(new_version);
 131           }
 132      }
 133
 134      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 135      return opkg_install_pkg(conf, pkg,0);
 136 }
 137
 138 opkg_error_t opkg_install_by_name(opkg_conf_t *conf, const char *pkg_name)
 139 {
 140      int cmp, err;
 141      pkg_t *old, *new;
 142      char *old_version, *new_version;
 143
 144      opkg_message(conf, OPKG_DEBUG2, " Getting old  from pkg_hash_fetch \n" );
 145      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
 146      if ( old )
 147         opkg_message(conf, OPKG_DEBUG2, " Old versions from pkg_hash_fetch %s \n",  old->version );
 148
 149      opkg_message(conf, OPKG_DEBUG2, " Getting new  from pkg_hash_fetch \n" );
 150      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name, &err);
 151      if ( new )
 152         opkg_message(conf, OPKG_DEBUG2, " New versions from pkg_hash_fetch %s \n",  new->version );
 153
 154 /* Pigi Basically here is broken the version stuff.
 155    What's happening is that nothing provide the version to differents
 156    functions, so the returned struct is always the latest.
 157    That's why the install by name don't work.
 158 */
 159      opkg_message(conf, OPKG_DEBUG2, " Versions from pkg_hash_fetch in %s ", __FUNCTION__ );
 160
 161      if ( old )
 162         opkg_message(conf, OPKG_DEBUG2, " old %s ", old->version );
 163      if ( new )
 164         opkg_message(conf, OPKG_DEBUG2, " new %s ", new->version );
 165      opkg_message(conf, OPKG_DEBUG2, " \n");
 166
 167      if (new == NULL) {
 168           if (err)
 169             return err;
 170           else
 171             return OPKG_PKG_HAS_NO_CANDIDATE;
 172      }
 173
 174      new->state_flag |= SF_USER;
 175      if (old) {
 176           old_version = pkg_version_str_alloc(old);
 177           new_version = pkg_version_str_alloc(new);
 178
 179           cmp = pkg_compare_versions(old, new);
 180           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 181              opkg_message(conf, OPKG_DEBUG, " Forcing downgrade \n");
 182              cmp = -1 ;                                       /* then we force opkg to downgrade */
 183                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 184                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 185           }
 186           opkg_message(conf, OPKG_DEBUG,
 187                        "Comparing visible versions of pkg %s:"
 188                        "\n\t%s is installed "
 189                        "\n\t%s is available "
 190                        "\n\t%d was comparison result\n",
 191                        pkg_name, old_version, new_version, cmp);
 192           if (cmp == 0 && !conf->force_reinstall) {
 193                opkg_message(conf, OPKG_NOTICE,
 194                             "Package %s (%s) installed in %s is up to date.\n",
 195                             old->name, old_version, old->dest->name);
 196                free(old_version);
 197                free(new_version);
 198                return 0;
 199           } else if (cmp > 0) {
 200                opkg_message(conf, OPKG_NOTICE,
 201                             "Not downgrading package %s on %s from %s to %s.\n",
 202                             old->name, old->dest->name, old_version, new_version);
 203                free(old_version);
 204                free(new_version);
 205                return 0;
 206           } else if (cmp < 0) {
 207                new->dest = old->dest;
 208                old->state_want = SW_DEINSTALL;    /* Here probably the problem for bug 1277 */
 209           }
 210      }
 211
 212      /* XXX: CLEANUP: The error code of opkg_install_by_name is really
 213         supposed to be an opkg_error_t, but opkg_install_pkg could
 214         return any kind of integer, (might be errno from a syscall,
 215         etc.). This is a real mess and will need to be cleaned up if
 216         anyone ever wants to make a nice libopkg. */
 217
 218      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 219      return opkg_install_pkg(conf, new,0);
 220 }
 221
 222 opkg_error_t opkg_install_multi_by_name(opkg_conf_t *conf, const char *pkg_name)
 223 {
 224      abstract_pkg_vec_t *providers = pkg_hash_fetch_all_installation_candidates (&conf->pkg_hash, pkg_name);
 225      int i;
 226      opkg_error_t err;
 227      abstract_pkg_t *ppkg ;
 228
 229      if (providers == NULL)
 230           return OPKG_PKG_HAS_NO_CANDIDATE;
 231
 232      for (i = 0; i < providers->len; i++) {
 233           ppkg = abstract_pkg_vec_get(providers, i);
 234           opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_by_name %d \n",__FUNCTION__, i);
 235           err = opkg_install_by_name(conf, ppkg->name);
 236           if (err)
 237                return err;
 238 /* XXX Maybe ppkg should be freed ? */
 239      }
 240      return 0;
 241 }
 242
 243 /*
 244  * Walk dependence graph starting with pkg, collect packages to be
 245  * installed into pkgs_needed, in dependence order.
 246  */
 247 int pkg_mark_dependencies_for_installation(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *pkgs_needed)
 248 {
 249      int i, err;
 250      pkg_vec_t *depends = pkg_vec_alloc();
 251      char **unresolved = NULL;
 252      int ndepends;
 253
 254      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 255                                                         pkg, depends,
 256                                                         &unresolved);
 257
 258      if (unresolved) {
 259           opkg_message(conf, OPKG_ERROR,
 260                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 261                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 262           while (*unresolved) {
 263                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 264                unresolved++;
 265           }
 266           opkg_message(conf, OPKG_ERROR, "\n");
 267           if (! conf->force_depends) {
 268                opkg_message(conf, OPKG_INFO,
 269                             "This could mean that your package list is out of date or that the packages\n"
 270                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 271                             "of this problem try again with the '-force-depends' option.\n");
 272                pkg_vec_free(depends);
 273                return OPKG_PKG_DEPS_UNSATISFIED;
 274           }
 275      }
 276
 277      if (ndepends <= 0) {
 278           pkg_vec_free(depends);
 279           return 0;
 280      }
 281
 282      for (i = 0; i < depends->len; i++) {
 283           pkg_t *dep = depends->pkgs[i];
 284           /* The package was uninstalled when we started, but another
 285              dep earlier in this loop may have depended on it and pulled
 286              it in, so check first. */
 287           if ((dep->state_status != SS_INSTALLED)
 288               && (dep->state_status != SS_UNPACKED)
 289               && (dep->state_want != SW_INSTALL)) {
 290
 291                /* Mark packages as to-be-installed */
 292                dep->state_want = SW_INSTALL;
 293
 294                /* Dependencies should be installed the same place as pkg */
 295                if (dep->dest == NULL) {
 296                     dep->dest = pkg->dest;
 297                }
 298
 299                err = pkg_mark_dependencies_for_installation(conf, dep, pkgs_needed);
 300                if (err) {
 301                     pkg_vec_free(depends);
 302                     return err;
 303                }
 304           }
 305      }
 306      if (pkgs_needed)
 307           pkg_vec_insert(pkgs_needed, pkg);
 308
 309      pkg_vec_free(depends);
 310
 311      return 0;
 312 }
 313 #if 0
 314 int name_mark_dependencies_for_installation(opkg_conf_t *conf, const char *pkg_name, pkg_vec_t *pkgs_needed)
 315 {
 316      int cmp;
 317      pkg_t *old, *new;
 318      char *old_version, *new_version;
 319
 320      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
 321
 322      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name);
 323      if (new == NULL) {
 324           return OPKG_PKG_HAS_NO_CANDIDATE;
 325      }
 326      if (old) {
 327           old_version = pkg_version_str_alloc(old);
 328           new_version = pkg_version_str_alloc(new);
 329
 330           cmp = pkg_compare_versions(old, new);
 331           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 332             opkg_message(conf, OPKG_DEBUG, " Forcing downgrade ");
 333              cmp = -1 ;                                       /* then we force opkg to downgrade */
 334                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 335                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 336           }
 337           opkg_message(conf, OPKG_DEBUG,
 338                        "comparing visible versions of pkg %s:"
 339                        "\n\t%s is installed "
 340                        "\n\t%s is available "
 341                        "\n\t%d was comparison result\n",
 342                        pkg_name, old_version, new_version, cmp);
 343           if (cmp == 0 && !conf->force_reinstall) {
 344                opkg_message(conf, OPKG_NOTICE,
 345                             "Package %s (%s) installed in %s is up to date.\n",
 346                             old->name, old_version, old->dest->name);
 347                free(old_version);
 348                free(new_version);
 349                return 0;
 350           } else if (cmp > 0) {
 351                opkg_message(conf, OPKG_NOTICE,
 352                             "Not downgrading package %s on %s from %s to %s.\n",
 353                             old->name, old->dest->name, old_version, new_version);
 354                free(old_version);
 355                free(new_version);
 356                return 0;
 357           } else if (cmp < 0) {
 358                new->dest = old->dest;
 359                old->state_want = SW_DEINSTALL;
 360                old->state_flag |= SF_OBSOLETE;
 361           }
 362      }
 363      return pkg_mark_dependencies_for_installation(conf, new, pkgs_needed);
 364 }
 365
 366 #endif
 367
 368 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg)
 369 {
 370      int i, err;
 371      pkg_vec_t *depends = pkg_vec_alloc();
 372      pkg_t *dep;
 373      char **unresolved = NULL;
 374      int ndepends;
 375
 376      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 377                                                         pkg, depends,
 378                                                         &unresolved);
 379
 380      if (unresolved) {
 381           opkg_message(conf, OPKG_ERROR,
 382                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 383                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 384           while (*unresolved) {
 385                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 386                unresolved++;
 387           }
 388           opkg_message(conf, OPKG_ERROR, "\n");
 389           if (! conf->force_depends) {
 390                opkg_message(conf, OPKG_INFO,
 391                             "This could mean that your package list is out of date or that the packages\n"
 392                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 393                             "of this problem try again with the '-force-depends' option.\n");
 394                pkg_vec_free(depends);
 395                return OPKG_PKG_DEPS_UNSATISFIED;
 396           }
 397      }
 398
 399      if (ndepends <= 0) {
 400           pkg_vec_free(depends);
 401           return 0;
 402      }
 403
 404      /* Mark packages as to-be-installed */
 405      for (i=0; i < depends->len; i++) {
 406           /* Dependencies should be installed the same place as pkg */
 407           if (depends->pkgs[i]->dest == NULL) {
 408                depends->pkgs[i]->dest = pkg->dest;
 409           }
 410           depends->pkgs[i]->state_want = SW_INSTALL;
 411      }
 412
 413      for (i = 0; i < depends->len; i++) {
 414           dep = depends->pkgs[i];
 415           /* The package was uninstalled when we started, but another
 416              dep earlier in this loop may have depended on it and pulled
 417              it in, so check first. */
 418           if ((dep->state_status != SS_INSTALLED)
 419               && (dep->state_status != SS_UNPACKED)) {
 420                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 421                err = opkg_install_pkg(conf, dep,0);
 422                /* mark this package as having been automatically installed to
 423                 * satisfy a dependancy */
 424                dep->auto_installed = 1;
 425                if (err) {
 426                     pkg_vec_free(depends);
 427                     return err;
 428                }
 429           }
 430      }
 431
 432      pkg_vec_free(depends);
 433
 434      return 0;
 435 }
 436
 437
 438 /* check all packages have their dependences satisfied, e.g., in case an upgraded package split */
 439 int opkg_satisfy_all_dependences(opkg_conf_t *conf)
 440 {
 441      if (conf->nodeps == 0) {
 442           int i;
 443           pkg_vec_t *installed = pkg_vec_alloc();
 444           pkg_hash_fetch_all_installed(&conf->pkg_hash, installed);
 445           for (i = 0; i < installed->len; i++) {
 446                pkg_t *pkg = installed->pkgs[i];
 447                satisfy_dependencies_for(conf, pkg);
 448           }
 449           pkg_vec_free(installed);
 450      }
 451      return 0;
 452 }
 453
 454 \f
 455
 456 static int check_conflicts_for(opkg_conf_t *conf, pkg_t *pkg)
 457 {
 458      int i;
 459      pkg_vec_t *conflicts = NULL;
 460      int level;
 461      const char *prefix;
 462      if (conf->force_depends) {
 463           level = OPKG_NOTICE;
 464           prefix = "Warning";
 465      } else {
 466           level = OPKG_ERROR;
 467           prefix = "ERROR";
 468      }
 469
 470      if (!conf->force_depends)
 471           conflicts = (pkg_vec_t *)pkg_hash_fetch_conflicts(&conf->pkg_hash, pkg);
 472
 473      if (conflicts) {
 474           opkg_message(conf, level,
 475                        "%s: The following packages conflict with %s:\n\t", prefix, pkg->name);
 476           i = 0;
 477           while (i < conflicts->len)
 478                opkg_message(conf, level, " %s", conflicts->pkgs[i++]->name);
 479           opkg_message(conf, level, "\n");
 480           pkg_vec_free(conflicts);
 481           return OPKG_PKG_DEPS_UNSATISFIED;
 482      }
 483      return 0;
 484 }
 485
 486 static int update_file_ownership(opkg_conf_t *conf, pkg_t *new_pkg, pkg_t *old_pkg)
 487 {
 488      str_list_t *new_list = pkg_get_installed_files(new_pkg);
 489      str_list_elt_t *iter;
 490
 491      for (iter = new_list->head; iter; iter = iter->next) {
 492           char *new_file = iter->data;
 493           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
 494           if (!new_file)
 495                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
 496           if (!owner || (owner == old_pkg))
 497                file_hash_set_file_owner(conf, new_file, new_pkg);
 498      }
 499      if (old_pkg) {
 500           str_list_t *old_list = pkg_get_installed_files(old_pkg);
 501           for (iter = old_list->head; iter; iter = iter->next) {
 502                char *old_file = iter->data;
 503                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
 504                if (owner == old_pkg) {
 505                     /* obsolete */
 506                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
 507                }
 508           }
 509      }
 510      return 0;
 511 }
 512
 513 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
 514 {
 515     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
 516
 517     /* sma 6.20.02:  yup; here's the first bit */
 518     /*
 519      * XXX: BUG easy for cworth
 520      * 1) please point the call below to the correct current root destination
 521      * 2) we need to resolve how to check the required space for a pending pkg,
 522      *    my diddling with the .ipk file size below isn't going to cut it.
 523      * 3) return a proper error code instead of 1
 524      */
 525      int comp_size, blocks_available;
 526
 527      if (!conf->force_space && pkg->installed_size != NULL) {
 528           blocks_available = get_available_blocks(conf->default_dest->root_dir);
 529
 530           comp_size = strtoul(pkg->installed_size, NULL, 0);
 531           /* round up a blocks count without doing fancy-but-slow casting jazz */
 532           comp_size = (int)((comp_size + 1023) / 1024);
 533
 534           if (comp_size >= blocks_available) {
 535                opkg_message(conf, OPKG_ERROR,
 536                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n",
 537                             blocks_available, conf->default_dest->root_dir, pkg->name, comp_size);
 538                return ENOSPC;
 539           }
 540      }
 541      return 0;
 542 }
 543
 544 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
 545 {
 546      int err;
 547      char *conffiles_file_name;
 548      char *root_dir;
 549      FILE *conffiles_file;
 550
 551      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
 552
 553      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
 554      if (pkg->tmp_unpack_dir == NULL) {
 555           opkg_message(conf, OPKG_ERROR,
 556                        "%s: Failed to create temporary directory '%s': %s\n",
 557                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
 558           return errno;
 559      }
 560
 561      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
 562      if (err) {
 563           return err;
 564      }
 565
 566      /* XXX: CLEANUP: There might be a cleaner place to read in the
 567         conffiles. Seems like I should be able to get everything to go
 568         through pkg_init_from_file. If so, maybe it would make sense to
 569         move all of unpack_pkg_control_files to that function. */
 570
 571      /* Don't need to re-read conffiles if we already have it */
 572      if (pkg->conffiles.head) {
 573           return 0;
 574      }
 575
 576      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
 577      if (! file_exists(conffiles_file_name)) {
 578           free(conffiles_file_name);
 579           return 0;
 580      }
 581
 582      conffiles_file = fopen(conffiles_file_name, "r");
 583      if (conffiles_file == NULL) {
 584           fprintf(stderr, "%s: failed to open %s: %s\n",
 585                   __FUNCTION__, conffiles_file_name, strerror(errno));
 586           free(conffiles_file_name);
 587           return errno;
 588      }
 589      free(conffiles_file_name);
 590
 591      while (1) {
 592           char *cf_name;
 593           char *cf_name_in_dest;
 594
 595           cf_name = file_read_line_alloc(conffiles_file);
 596           if (cf_name == NULL) {
 597                break;
 598           }
 599           str_chomp(cf_name);
 600           if (cf_name[0] == '\0') {
 601                continue;
 602           }
 603
 604           /* Prepend dest->root_dir to conffile name.
 605              Take pains to avoid multiple slashes. */
 606           root_dir = pkg->dest->root_dir;
 607           if (conf->offline_root)
 608                /* skip the offline_root prefix */
 609                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
 610           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
 611                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
 612
 613           /* Can't get an md5sum now, (file isn't extracted yet).
 614              We'll wait until resolve_conffiles */
 615           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
 616
 617           free(cf_name);
 618           free(cf_name_in_dest);
 619      }
 620
 621      fclose(conffiles_file);
 622
 623      return 0;
 624 }
 625
 626 /* returns number of installed replacees */
 627 int pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
 628 {
 629      abstract_pkg_t **replaces = pkg->replaces;
 630      int replaces_count = pkg->replaces_count;
 631      int i, j;
 632      for (i = 0; i < replaces_count; i++) {
 633           abstract_pkg_t *ab_pkg = replaces[i];
 634           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 635           if (pkg_vec) {
 636                for (j = 0; j < pkg_vec->len; j++) {
 637                     pkg_t *replacee = pkg_vec->pkgs[j];
 638                     if (!pkg_conflicts(pkg, replacee))
 639                          continue;
 640                     if (replacee->state_status == SS_INSTALLED) {
 641                          pkg_vec_insert(installed_replacees, replacee);
 642                     }
 643                }
 644           }
 645      }
 646      return installed_replacees->len;
 647 }
 648
 649 int pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
 650 {
 651      int i;
 652      int replaces_count = replacees->len;
 653      for (i = 0; i < replaces_count; i++) {
 654           pkg_t *replacee = replacees->pkgs[i];
 655           int err;
 656           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
 657           err = opkg_remove_pkg(conf, replacee,0);
 658           if (err)
 659                return err;
 660      }
 661      return 0;
 662 }
 663
 664 /* to unwind the removal: make sure they are installed */
 665 int pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
 666 {
 667      int i, err;
 668      int replaces_count = replacees->len;
 669      for (i = 0; i < replaces_count; i++) {
 670           pkg_t *replacee = replacees->pkgs[i];
 671           if (replacee->state_status != SS_INSTALLED) {
 672                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 673                err = opkg_install_pkg(conf, replacee,0);
 674                if (err)
 675                     return err;
 676           }
 677      }
 678      return 0;
 679 }
 680
 681 int caught_sigint = 0;
 682 static void opkg_install_pkg_sigint_handler(int sig)
 683 {
 684      caught_sigint = sig;
 685 }
 686
 687 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
 688 static int opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
 689 {
 690      if (old_pkg) {
 691           char message_out[15];
 692           char *old_version = pkg_version_str_alloc(old_pkg);
 693           char *new_version = pkg_version_str_alloc(pkg);
 694           int cmp = pkg_compare_versions(old_pkg, pkg);
 695           int rc = 0;
 696
 697           memset(message_out,'\x0',15);
 698           strncpy (message_out,"Upgrading ",strlen("Upgrading "));
 699           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 700              cmp = -1 ;                                       /* then we force opkg to downgrade */
 701              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
 702                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 703           }
 704
 705           if (cmp > 0) {
 706                opkg_message(conf, OPKG_NOTICE,
 707                             "Not downgrading package %s on %s from %s to %s.\n",
 708                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
 709                rc = 1;
 710           } else if (cmp < 0) {
 711                opkg_message(conf, OPKG_NOTICE,
 712                             "%s%s on %s from %s to %s...\n",
 713                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
 714                pkg->dest = old_pkg->dest;
 715                rc = 0;
 716           } else /* cmp == 0 */ {
 717                if (conf->force_reinstall) {
 718                     opkg_message(conf, OPKG_NOTICE,
 719                                  "Reinstalling %s (%s) on %s...\n",
 720                                  pkg->name, new_version, old_pkg->dest->name);
 721                     pkg->dest = old_pkg->dest;
 722                     rc = 0;
 723                } else {
 724                     opkg_message(conf, OPKG_NOTICE,
 725                                  "Not installing %s (%s) on %s -- already installed.\n",
 726                                  pkg->name, new_version, old_pkg->dest->name);
 727                     rc = 1;
 728                }
 729           }
 730           free(old_version);
 731           free(new_version);
 732           return rc;
 733      } else {
 734       char message_out[15] ;
 735       memset(message_out,'\x0',15);
 736       if ( message )
 737           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
 738       else
 739           strncpy( message_out,"Installing ",strlen("Installing ") );
 740           char *version = pkg_version_str_alloc(pkg);
 741
 742           opkg_message(conf, OPKG_NOTICE,
 743                        "%s%s (%s) to %s...\n", message_out,
 744                        pkg->name, version, pkg->dest->name);
 745           free(version);
 746           return 0;
 747      }
 748 }
 749
 750 /* and now the meat... */
 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      char *pkgid;
 761
 762      if ( from_upgrade )
 763         message = 1;            /* Coming from an upgrade, and should change the output message */
 764
 765      if (!pkg) {
 766           opkg_message(conf, OPKG_ERROR,
 767                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
 768           return OPKG_INSTALL_ERR_INTERNAL;
 769      }
 770
 771      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
 772
 773      if (!pkg_arch_supported(conf, pkg)) {
 774           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
 775                        pkg->architecture, pkg->name);
 776           return OPKG_INSTALL_ERR_INTERNAL;
 777      }
 778      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
 779           err = satisfy_dependencies_for(conf, pkg);
 780           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 781
 782           opkg_message(conf, OPKG_NOTICE,
 783                        "Package %s is already installed in %s.\n",
 784                        pkg->name, pkg->dest->name);
 785           return 0;
 786      }
 787
 788      if (pkg->dest == NULL) {
 789           pkg->dest = conf->default_dest;
 790      }
 791
 792      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 793
 794      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
 795      if (err) { return OPKG_INSTALL_ERR_NO_DOWNGRADE; }
 796
 797      pkg->state_want = SW_INSTALL;
 798      if (old_pkg){
 799          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
 800      }
 801
 802
 803      /* Abhaya: conflicts check */
 804      err = check_conflicts_for(conf, pkg);
 805      if (err) { return OPKG_INSTALL_ERR_CONFLICTS; }
 806
 807      /* this setup is to remove the upgrade scenario in the end when
 808         installing pkg A, A deps B & B deps on A. So both B and A are
 809         installed. Then A's installation is started resulting in an
 810         uncecessary upgrade */
 811      if (pkg->state_status == SS_INSTALLED
 812          && conf->force_reinstall == 0) return 0;
 813
 814      err = verify_pkg_installable(conf, pkg);
 815      if (err) { return OPKG_INSTALL_ERR_NO_SPACE; }
 816
 817      if (pkg->local_filename == NULL) {
 818           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
 819           if (err) {
 820                opkg_message(conf, OPKG_ERROR,
 821                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
 822                             pkg->name);
 823                return OPKG_INSTALL_ERR_DOWNLOAD;
 824           }
 825      }
 826
 827      /* check that the repository is valid */
 828      #if HAVE_GPGME
 829      char *list_file_name, *sig_file_name, *lists_dir;
 830
 831      sprintf_alloc (&lists_dir, "%s",
 832                    (conf->restrict_to_default_dest)
 833                     ? conf->default_dest->lists_dir
 834                     : conf->lists_dir);
 835      sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
 836      sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
 837
 838      if (file_exists (sig_file_name))
 839      {
 840        if (opkg_verify_file (conf, list_file_name, sig_file_name))
 841          return OPKG_INSTALL_ERR_SIGNATURE;
 842      }
 843
 844      free (lists_dir);
 845      free (list_file_name);
 846      free (sig_file_name);
 847      #endif
 848
 849      /* Check for md5 values */
 850      if (pkg->md5sum)
 851      {
 852          file_md5 = file_md5sum_alloc(pkg->local_filename);
 853          if (strcmp(file_md5, pkg->md5sum))
 854          {
 855               opkg_message(conf, OPKG_ERROR,
 856                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 857                            pkg->name);
 858               free(file_md5);
 859               return OPKG_INSTALL_ERR_MD5;
 860          }
 861          free(file_md5);
 862      }
 863
 864      if (pkg->tmp_unpack_dir == NULL) {
 865           unpack_pkg_control_files(conf, pkg);
 866      }
 867
 868      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 869 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 870 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 871      err = update_file_ownership(conf, pkg, old_pkg);
 872      if (err) { return OPKG_ERR_UNKNOWN; }
 873
 874      if (conf->nodeps == 0) {
 875           err = satisfy_dependencies_for(conf, pkg);
 876           if (err) { return OPKG_INSTALL_ERR_DEPENDENCIES; }
 877      }
 878
 879      replacees = pkg_vec_alloc();
 880      pkg_get_installed_replacees(conf, pkg, replacees);
 881
 882      sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 883      opkg_set_current_state (conf, OPKG_STATE_INSTALLING_PKG, pkgid);
 884      free (pkgid);
 885
 886      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 887      {
 888           sigset_t newset, oldset;
 889           sighandler_t old_handler = NULL;
 890           int use_signal = 0;
 891           caught_sigint = 0;
 892           if (use_signal) {
 893                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 894           } else {
 895                sigemptyset(&newset);
 896                sigaddset(&newset, SIGINT);
 897                sigprocmask(SIG_BLOCK, &newset, &oldset);
 898           }
 899
 900           opkg_state_changed++;
 901           pkg->state_flag |= SF_FILELIST_CHANGED;
 902
 903           /* XXX: BUG: we really should treat replacement more like an upgrade
 904            *      Instead, we're going to remove the replacees
 905            */
 906           err = pkg_remove_installed_replacees(conf, replacees);
 907           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 908
 909           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 910           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 911
 912           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 913           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 914
 915           err = preinst_configure(conf, pkg, old_pkg);
 916           if (err) goto UNWIND_PREINST_CONFIGURE;
 917
 918           err = backup_modified_conffiles(conf, pkg, old_pkg);
 919           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 920
 921           err = check_data_file_clashes(conf, pkg, old_pkg);
 922           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 923
 924           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 925           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 926
 927           if (conf->noaction) return 0;
 928
 929           /* point of no return: no unwinding after this */
 930           if (old_pkg && !conf->force_reinstall) {
 931                old_pkg->state_want = SW_DEINSTALL;
 932
 933                if (old_pkg->state_flag & SF_NOPRUNE) {
 934                     opkg_message(conf, OPKG_INFO,
 935                                  "  not removing obsolesced files because package marked noprune\n");
 936                } else {
 937                     opkg_message(conf, OPKG_INFO,
 938                                  "  removing obsolesced files\n");
 939                     remove_obsolesced_files(conf, pkg, old_pkg);
 940                }
 941                /* removing files from old package, to avoid ghost files */
 942                remove_data_files_and_list(conf, old_pkg);
 943 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 944                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 945                remove_postrm(conf, old_pkg);
 946 /* Pigi */
 947
 948           }
 949
 950
 951           opkg_message(conf, OPKG_INFO,
 952                        "  installing maintainer scripts\n");
 953           install_maintainer_scripts(conf, pkg, old_pkg);
 954
 955           /* the following just returns 0 */
 956           remove_disappeared(conf, pkg);
 957
 958           opkg_message(conf, OPKG_INFO,
 959                        "  installing data files\n");
 960           install_data_files(conf, pkg);
 961
 962 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
 963           err = check_data_file_clashes_change(conf, pkg, old_pkg);
 964
 965           opkg_message(conf, OPKG_INFO,
 966                        "  resolving conf files\n");
 967           resolve_conffiles(conf, pkg);
 968
 969           pkg->state_status = SS_UNPACKED;
 970           old_state_flag = pkg->state_flag;
 971           pkg->state_flag &= ~SF_PREFER;
 972           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
 973
 974           if (old_pkg && !conf->force_reinstall) {
 975                old_pkg->state_status = SS_NOT_INSTALLED;
 976           }
 977
 978           time(&pkg->installed_time);
 979
 980           opkg_message(conf, OPKG_INFO,
 981                        "  cleanup temp files\n");
 982           cleanup_temporary_files(conf, pkg);
 983
 984           ab_pkg = pkg->parent;
 985           if (ab_pkg)
 986                ab_pkg->state_status = pkg->state_status;
 987
 988           opkg_message(conf, OPKG_INFO, "Done.\n");
 989
 990           if (use_signal)
 991                signal(SIGINT, old_handler);
 992           else
 993                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
 994           pkg_vec_free (replacees);
 995           return 0;
 996
 997
 998      UNWIND_POSTRM_UPGRADE_OLD_PKG:
 999           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1000      UNWIND_CHECK_DATA_FILE_CLASHES:
1001           check_data_file_clashes_unwind(conf, pkg, old_pkg);
1002      UNWIND_BACKUP_MODIFIED_CONFFILES:
1003           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1004      UNWIND_PREINST_CONFIGURE:
1005           preinst_configure_unwind(conf, pkg, old_pkg);
1006      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1007           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1008      UNWIND_PRERM_UPGRADE_OLD_PKG:
1009           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1010      UNWIND_REMOVE_INSTALLED_REPLACEES:
1011           pkg_remove_installed_replacees_unwind(conf, replacees);
1012
1013           opkg_message(conf, OPKG_INFO,
1014                        "  cleanup temp files\n");
1015           cleanup_temporary_files(conf, pkg);
1016
1017           opkg_message(conf, OPKG_INFO,
1018                        "Failed.\n");
1019           if (use_signal)
1020                signal(SIGINT, old_handler);
1021           else
1022                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1023
1024           pkg_vec_free (replacees);
1025           return OPKG_ERR_UNKNOWN;
1026      }
1027      opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
1028 }
1029
1030 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1031 {
1032      /* DPKG_INCOMPATIBILITY:
1033         dpkg does some things here that we don't do yet. Do we care?
1034
1035         1. If a version of the package is already installed, call
1036            old-prerm upgrade new-version
1037         2. If the script runs but exits with a non-zero exit status
1038            new-prerm failed-upgrade old-version
1039            Error unwind, for both the above cases:
1040            old-postinst abort-upgrade new-version
1041      */
1042      return 0;
1043 }
1044
1045 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1046 {
1047      /* DPKG_INCOMPATIBILITY:
1048         dpkg does some things here that we don't do yet. Do we care?
1049         (See prerm_upgrade_old_package for details)
1050      */
1051      return 0;
1052 }
1053
1054 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1055 {
1056      /* DPKG_INCOMPATIBILITY:
1057         dpkg does some things here that we don't do yet. Do we care?
1058         2. If a 'conflicting' package is being removed at the same time:
1059                 1. If any packages depended on that conflicting package and
1060                    --auto-deconfigure is specified, call, for each such package:
1061                    deconfigured's-prerm deconfigure \
1062                    in-favour package-being-installed version \
1063                    removing conflicting-package version
1064                 Error unwind:
1065                    deconfigured's-postinst abort-deconfigure \
1066                    in-favour package-being-installed-but-failed version \
1067                    removing conflicting-package version
1068
1069                    The deconfigured packages are marked as requiring
1070                    configuration, so that if --install is used they will be
1071                    configured again if possible.
1072                 2. To prepare for removal of the conflicting package, call:
1073                    conflictor's-prerm remove in-favour package new-version
1074                 Error unwind:
1075                    conflictor's-postinst abort-remove in-favour package new-version
1076      */
1077      return 0;
1078 }
1079
1080 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1081 {
1082      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1083         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1084         details) */
1085      return 0;
1086 }
1087
1088 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1089 {
1090      int err;
1091      char *preinst_args;
1092
1093      if (old_pkg) {
1094           char *old_version = pkg_version_str_alloc(old_pkg);
1095           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1096           free(old_version);
1097      } else if (pkg->state_status == SS_CONFIG_FILES) {
1098           char *pkg_version = pkg_version_str_alloc(pkg);
1099           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1100           free(pkg_version);
1101      } else {
1102           preinst_args = strdup("install");
1103      }
1104
1105      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1106      if (err) {
1107           opkg_message(conf, OPKG_ERROR,
1108                        "Aborting installation of %s\n", pkg->name);
1109           return 1;
1110      }
1111
1112      free(preinst_args);
1113
1114      return 0;
1115 }
1116
1117 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1118 {
1119      /* DPKG_INCOMPATIBILITY:
1120         dpkg does the following error unwind, should we?
1121         pkg->postrm abort-upgrade old-version
1122         OR pkg->postrm abort-install old-version
1123         OR pkg->postrm abort-install
1124      */
1125      return 0;
1126 }
1127
1128 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1129 {
1130      int err;
1131      conffile_list_elt_t *iter;
1132      conffile_t *cf;
1133
1134      if (conf->noaction) return 0;
1135
1136      /* Backup all modified conffiles */
1137      if (old_pkg) {
1138           for (iter = old_pkg->conffiles.head; iter; iter = iter->next) {
1139                char *cf_name;
1140
1141                cf = iter->data;
1142                cf_name = root_filename_alloc(conf, cf->name);
1143
1144                /* Don't worry if the conffile is just plain gone */
1145                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1146                     err = backup_make_backup(conf, cf_name);
1147                     if (err) {
1148                          return err;
1149                     }
1150                }
1151                free(cf_name);
1152           }
1153      }
1154
1155      /* Backup all conffiles that were not conffiles in old_pkg */
1156      for (iter = pkg->conffiles.head; iter; iter = iter->next) {
1157           char *cf_name;
1158           cf = iter->data;
1159           cf_name = root_filename_alloc(conf, cf->name);
1160           /* Ignore if this was a conffile in old_pkg as well */
1161           if (pkg_get_conffile(old_pkg, cf->name)) {
1162                continue;
1163           }
1164
1165           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1166                err = backup_make_backup(conf, cf_name);
1167                if (err) {
1168                     return err;
1169                }
1170           }
1171           free(cf_name);
1172      }
1173
1174      return 0;
1175 }
1176
1177 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1178 {
1179      conffile_list_elt_t *iter;
1180
1181      if (old_pkg) {
1182           for (iter = old_pkg->conffiles.head; iter; iter = iter->next) {
1183                backup_remove(iter->data->name);
1184           }
1185      }
1186
1187      for (iter = pkg->conffiles.head; iter; iter = iter->next) {
1188           backup_remove(iter->data->name);
1189      }
1190
1191      return 0;
1192 }
1193
1194
1195 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1196 {
1197      /* DPKG_INCOMPATIBILITY:
1198         opkg takes a slightly different approach than dpkg at this
1199         point.  dpkg installs each file in the new package while
1200         creating a backup for any file that is replaced, (so that it
1201         can unwind if necessary).  To avoid complexity and redundant
1202         storage, opkg doesn't do any installation until later, (at the
1203         point at which dpkg removes the backups.
1204
1205         But, we do have to check for data file clashes, since after
1206         installing a package with a file clash, removing either of the
1207         packages involved in the clash has the potential to break the
1208         other package.
1209      */
1210      str_list_t *files_list;
1211      str_list_elt_t *iter;
1212
1213      int clashes = 0;
1214
1215      files_list = pkg_get_installed_files(pkg);
1216      for (iter = files_list->head; iter; iter = iter->next) {
1217           char *root_filename;
1218           char *filename = iter->data;
1219           root_filename = root_filename_alloc(conf, filename);
1220           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1221                pkg_t *owner;
1222                pkg_t *obs;
1223                /* Pre-existing conffiles are OK */
1224                /* @@@@ should have way to check that it is a conffile -Jamey */
1225                if (backup_exists_for(root_filename)) {
1226                     continue;
1227                }
1228
1229                /* Pre-existing files are OK if force-overwrite was asserted. */
1230                if (conf->force_overwrite) {
1231                     /* but we need to change who owns this file */
1232                     file_hash_set_file_owner(conf, filename, pkg);
1233                     continue;
1234                }
1235
1236                owner = file_hash_get_file_owner(conf, filename);
1237
1238                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1239                if (owner && old_pkg) {
1240                     if (strcmp(owner->name, old_pkg->name) == 0) {
1241                          continue;
1242                     }
1243                }
1244
1245                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1246                if (owner) {
1247                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1248                     if (pkg_replaces(pkg, owner)) {
1249                          continue;
1250                     }
1251 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1252    then it's ok to overwrite. */
1253                     if (strcmp(owner->name,pkg->name)==0){
1254                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1255                          continue;
1256                     }
1257                }
1258
1259                /* Pre-existing files are OK if they are obsolete */
1260                obs = hash_table_get(&conf->obs_file_hash, filename);
1261                if (obs) {
1262                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1263                     continue;
1264                }
1265
1266                /* We have found a clash. */
1267                opkg_message(conf, OPKG_ERROR,
1268                             "Package %s wants to install file %s\n"
1269                             "\tBut that file is already provided by package ",
1270                             pkg->name, filename);
1271                if (owner) {
1272                     opkg_message(conf, OPKG_ERROR,
1273                                  "%s\n", owner->name);
1274                } else {
1275                     opkg_message(conf, OPKG_ERROR,
1276                                  "<no package>\nPlease move this file out of the way and try again.\n");
1277                }
1278                clashes++;
1279           }
1280           free(root_filename);
1281      }
1282      pkg_free_installed_files(pkg);
1283
1284      return clashes;
1285 }
1286
1287 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1288 {
1289     /* Basically that's the worst hack I could do to be able to change ownership of
1290        file list, but, being that we have no way to unwind the mods, due to structure
1291        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1292        What we do here is change the ownership of file in hash if a replace ( or similar events
1293        happens )
1294        Only the action that are needed to change name should be considered.
1295        @@@ To change after 1.0 release.
1296      */
1297      str_list_t *files_list;
1298      str_list_elt_t *iter;
1299
1300      int clashes = 0;
1301
1302      files_list = pkg_get_installed_files(pkg);
1303      for (iter = files_list->head; iter; iter = iter->next) {
1304           char *root_filename;
1305           char *filename = iter->data;
1306           root_filename = root_filename_alloc(conf, filename);
1307           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1308                pkg_t *owner;
1309
1310                if (conf->force_overwrite) {
1311                     /* but we need to change who owns this file */
1312                     file_hash_set_file_owner(conf, filename, pkg);
1313                     continue;
1314                }
1315
1316                owner = file_hash_get_file_owner(conf, filename);
1317
1318                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1319                if (owner) {
1320                     if (pkg_replaces(pkg, owner)) {
1321 /* It's now time to change the owner of that file.
1322    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1323                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1324                          file_hash_set_file_owner(conf, filename, pkg);
1325                          continue;
1326                     }
1327                }
1328
1329           }
1330           free(root_filename);
1331      }
1332      pkg_free_installed_files(pkg);
1333
1334      return clashes;
1335 }
1336
1337 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1338 {
1339      /* Nothing to do since check_data_file_clashes doesn't change state */
1340      return 0;
1341 }
1342
1343 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1344 {
1345      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1346         1. If the package is being upgraded, call
1347            old-postrm upgrade new-version
1348         2. If this fails, attempt:
1349            new-postrm failed-upgrade old-version
1350         Error unwind, for both cases:
1351            old-preinst abort-upgrade new-version    */
1352      return 0;
1353 }
1354
1355 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1356 {
1357      /* DPKG_INCOMPATIBILITY:
1358         dpkg does some things here that we don't do yet. Do we care?
1359         (See postrm_upgrade_old_pkg for details)
1360      */
1361     return 0;
1362 }
1363
1364 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1365 {
1366      int err;
1367      str_list_t *old_files;
1368      str_list_elt_t *of;
1369      str_list_t *new_files;
1370      str_list_elt_t *nf;
1371
1372      if (old_pkg == NULL) {
1373           return 0;
1374      }
1375
1376      old_files = pkg_get_installed_files(old_pkg);
1377      new_files = pkg_get_installed_files(pkg);
1378
1379      for (of = old_files->head; of; of = of->next) {
1380           pkg_t *owner;
1381           char *old, *new;
1382           old = of->data;
1383           for (nf = new_files->head; nf; nf = nf->next) {
1384                new = nf->data;
1385                if (strcmp(old, new) == 0) {
1386                     goto NOT_OBSOLETE;
1387                }
1388           }
1389           if (file_is_dir(old)) {
1390                continue;
1391           }
1392           owner = file_hash_get_file_owner(conf, old);
1393           if (owner != old_pkg) {
1394                /* in case obsolete file no longer belongs to old_pkg */
1395                continue;
1396           }
1397
1398           /* old file is obsolete */
1399           opkg_message(conf, OPKG_INFO,
1400                        "    removing obsolete file %s\n", old);
1401           if (!conf->noaction) {
1402                err = unlink(old);
1403                if (err) {
1404                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1405                                  strerror(errno));
1406                }
1407           }
1408
1409      NOT_OBSOLETE:
1410           ;
1411      }
1412
1413      pkg_free_installed_files(old_pkg);
1414      pkg_free_installed_files(pkg);
1415
1416      return 0;
1417 }
1418
1419 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1420 {
1421      int i;
1422      int err = 0;
1423      char *globpattern;
1424      glob_t globbuf;
1425      if (0) {
1426           if (!pkg->dest) {
1427                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1428                return -1;
1429           }
1430           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1431           err = glob(globpattern, 0, NULL, &globbuf);
1432           free(globpattern);
1433           if (err) {
1434                return err;
1435           }
1436           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1437           for (i = 0; i < globbuf.gl_pathc; i++) {
1438                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1439                             globbuf.gl_pathv[i], old_pkg->name);
1440                if (!conf->noaction)
1441                     unlink(globbuf.gl_pathv[i]);
1442           }
1443           globfree(&globbuf);
1444      }
1445      return err;
1446 }
1447
1448 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1449 {
1450      int ret;
1451      char *prefix;
1452
1453      if (old_pkg)
1454           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1455      sprintf_alloc(&prefix, "%s.", pkg->name);
1456      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1457                                                         pkg->dest->info_dir,
1458                                                         prefix);
1459      free(prefix);
1460      return ret;
1461 }
1462
1463 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1464 {
1465      /* DPKG_INCOMPATIBILITY:
1466         This is a fairly sophisticated dpkg operation. Shall we
1467         skip it? */
1468
1469      /* Any packages all of whose files have been overwritten during the
1470         installation, and which aren't required for dependencies, are
1471         considered to have been removed. For each such package
1472         1. disappearer's-postrm disappear overwriter overwriter-version
1473         2. The package's maintainer scripts are removed
1474         3. It is noted in the status database as being in a sane state,
1475            namely not installed (any conffiles it may have are ignored,
1476            rather than being removed by dpkg). Note that disappearing
1477            packages do not have their prerm called, because dpkg doesn't
1478            know in advance that the package is going to vanish.
1479      */
1480      return 0;
1481 }
1482
1483 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1484 {
1485      int err;
1486
1487      /* opkg takes a slightly different approach to data file backups
1488         than dpkg. Rather than removing backups at this point, we
1489         actually do the data file installation now. See comments in
1490         check_data_file_clashes() for more details. */
1491
1492      opkg_message(conf, OPKG_INFO,
1493                   "    extracting data files to %s\n", pkg->dest->root_dir);
1494      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1495      if (err) {
1496           return err;
1497      }
1498
1499      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1500         so we can't save ourself from removing important packages
1501         At this point we (should) have extracted the .control file, so it
1502         would be a good idea to reload the data in it, and set the Essential
1503         state in *pkg. From now on the Essential is back in status file and
1504         we can protect again.
1505         We should operate this way:
1506         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1507         check for "Essential" in it
1508         set the value in pkg->essential.
1509         This new routine could be useful also for every other flag
1510         Pigi: 16/03/2004 */
1511      set_flags_from_control(conf, pkg) ;
1512
1513      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1514      err = pkg_write_filelist(conf, pkg);
1515      if (err)
1516           return err;
1517
1518      /* XXX: FEATURE: opkg should identify any files which existed
1519         before installation and which were overwritten, (see
1520         check_data_file_clashes()). What it must do is remove any such
1521         files from the filelist of the old package which provided the
1522         file. Otherwise, if the old package were removed at some point
1523         it would break the new package. Removing the new package will
1524         also break the old one, but this cannot be helped since the old
1525         package's file has already been deleted. This is the importance
1526         of check_data_file_clashes(), and only allowing opkg to install
1527         a clashing package with a user force. */
1528
1529      return 0;
1530 }
1531
1532 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1533 {
1534      conffile_list_elt_t *iter;
1535      conffile_t *cf;
1536      char *cf_backup;
1537
1538     char *md5sum;
1539
1540
1541      if (conf->noaction) return 0;
1542
1543      for (iter = pkg->conffiles.head; iter; iter = iter->next) {
1544           char *root_filename;
1545           cf = iter->data;
1546           root_filename = root_filename_alloc(conf, cf->name);
1547
1548           /* Might need to initialize the md5sum for each conffile */
1549           if (cf->value == NULL) {
1550                cf->value = file_md5sum_alloc(root_filename);
1551           }
1552
1553           if (!file_exists(root_filename)) {
1554                free(root_filename);
1555                continue;
1556           }
1557
1558           cf_backup = backup_filename_alloc(root_filename);
1559
1560
1561           if (file_exists(cf_backup)) {
1562  /* Let's compute md5 to test if files are changed */
1563               md5sum = file_md5sum_alloc(cf_backup);
1564                if (strcmp( cf->value,md5sum) != 0 ) {
1565                   if (conf->force_defaults
1566                       || user_prefers_old_conffile(cf->name, cf_backup) ) {
1567                        rename(cf_backup, root_filename);
1568                   }
1569                }
1570                unlink(cf_backup);
1571                free(md5sum);
1572           }
1573
1574           free(cf_backup);
1575           free(root_filename);
1576      }
1577
1578      return 0;
1579 }
1580
1581 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1582 {
1583      char *response;
1584      const char *short_file_name;
1585
1586      short_file_name = strrchr(file_name, '/');
1587      if (short_file_name) {
1588           short_file_name++;
1589      } else {
1590           short_file_name = file_name;
1591      }
1592
1593      while (1) {
1594           response = get_user_response("    Configuration file '%s'\n"
1595                                        "    ==> File on system created by you or by a script.\n"
1596                                        "    ==> File also in package provided by package maintainer.\n"
1597                                        "       What would you like to do about it ?  Your options are:\n"
1598                                        "        Y or I  : install the package maintainer's version\n"
1599                                        "        N or O  : keep your currently-installed version\n"
1600                                        "          D     : show the differences between the versions (if diff is installed)\n"
1601                                        "     The default action is to keep your current version.\n"
1602                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1603           if (strcmp(response, "y") == 0
1604               || strcmp(response, "i") == 0
1605               || strcmp(response, "yes") == 0) {
1606                free(response);
1607                return 0;
1608           }
1609
1610           if (strcmp(response, "d") == 0) {
1611                char *cmd;
1612
1613                free(response);
1614                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1615                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1616                xsystem(cmd);
1617                free(cmd);
1618                printf("    [Press ENTER to continue]\n");
1619                response = file_read_line_alloc(stdin);
1620                free(response);
1621                continue;
1622           }
1623
1624           free(response);
1625           return 1;
1626      }
1627 }
1628
1629 /* XXX: CLEANUP: I'd like to move all of the code for
1630    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1631    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1632    pkg_deinit for example). */
1633 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1634 {
1635      DIR *tmp_dir;
1636      struct dirent *dirent;
1637      char *tmp_file;
1638
1639 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1640 #error
1641      opkg_message(conf, OPKG_DEBUG,
1642                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1643                   __FUNCTION__, pkg->tmp_unpack_dir);
1644      return 0;
1645 #endif
1646
1647      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1648           tmp_dir = opendir(pkg->tmp_unpack_dir);
1649           if (tmp_dir) {
1650                while (1) {
1651                     dirent = readdir(tmp_dir);
1652                     if (dirent == NULL) {
1653                          break;
1654                     }
1655                     sprintf_alloc(&tmp_file, "%s/%s",
1656                                   pkg->tmp_unpack_dir, dirent->d_name);
1657                     if (! file_is_dir(tmp_file)) {
1658                          unlink(tmp_file);
1659                     }
1660                     free(tmp_file);
1661                }
1662                closedir(tmp_dir);
1663                rmdir(pkg->tmp_unpack_dir);
1664                free(pkg->tmp_unpack_dir);
1665                pkg->tmp_unpack_dir = NULL;
1666           }
1667      }
1668
1669      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1670                   pkg->name, pkg->local_filename, conf->tmp_dir);
1671      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1672           unlink(pkg->local_filename);
1673           free(pkg->local_filename);
1674           pkg->local_filename = NULL;
1675      }
1676
1677      return 0;
1678 }
1679
1680 static char *backup_filename_alloc(const char *file_name)
1681 {
1682      char *backup;
1683
1684      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1685
1686      return backup;
1687 }
1688
1689 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1690 {
1691      int err;
1692      char *backup;
1693
1694      backup = backup_filename_alloc(file_name);
1695      err = file_copy(file_name, backup);
1696      if (err) {
1697           opkg_message(conf, OPKG_ERROR,
1698                        "%s: Failed to copy %s to %s\n",
1699                        __FUNCTION__, file_name, backup);
1700      }
1701
1702      free(backup);
1703
1704      return err;
1705 }
1706
1707 static int backup_exists_for(const char *file_name)
1708 {
1709      int ret;
1710      char *backup;
1711
1712      backup = backup_filename_alloc(file_name);
1713
1714      ret = file_exists(backup);
1715
1716      free(backup);
1717
1718      return ret;
1719 }
1720
1721 static int backup_remove(const char *file_name)
1722 {
1723      char *backup;
1724
1725      backup = backup_filename_alloc(file_name);
1726      unlink(backup);
1727      free(backup);
1728
1729      return 0;
1730 }
1731