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;
 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);
 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           return OPKG_PKG_HAS_NO_CANDIDATE;
 169      }
 170
 171      new->state_flag |= SF_USER;
 172      if (old) {
 173           old_version = pkg_version_str_alloc(old);
 174           new_version = pkg_version_str_alloc(new);
 175
 176           cmp = pkg_compare_versions(old, new);
 177           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 178              opkg_message(conf, OPKG_DEBUG, " Forcing downgrade \n");
 179              cmp = -1 ;                                       /* then we force opkg to downgrade */
 180                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 181                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 182           }
 183           opkg_message(conf, OPKG_DEBUG,
 184                        "Comparing visible versions of pkg %s:"
 185                        "\n\t%s is installed "
 186                        "\n\t%s is available "
 187                        "\n\t%d was comparison result\n",
 188                        pkg_name, old_version, new_version, cmp);
 189           if (cmp == 0 && !conf->force_reinstall) {
 190                opkg_message(conf, OPKG_NOTICE,
 191                             "Package %s (%s) installed in %s is up to date.\n",
 192                             old->name, old_version, old->dest->name);
 193                free(old_version);
 194                free(new_version);
 195                return 0;
 196           } else if (cmp > 0) {
 197                opkg_message(conf, OPKG_NOTICE,
 198                             "Not downgrading package %s on %s from %s to %s.\n",
 199                             old->name, old->dest->name, old_version, new_version);
 200                free(old_version);
 201                free(new_version);
 202                return 0;
 203           } else if (cmp < 0) {
 204                new->dest = old->dest;
 205                old->state_want = SW_DEINSTALL;    /* Here probably the problem for bug 1277 */
 206           }
 207      }
 208
 209      /* XXX: CLEANUP: The error code of opkg_install_by_name is really
 210         supposed to be an opkg_error_t, but opkg_install_pkg could
 211         return any kind of integer, (might be errno from a syscall,
 212         etc.). This is a real mess and will need to be cleaned up if
 213         anyone ever wants to make a nice libopkg. */
 214
 215      opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 216      return opkg_install_pkg(conf, new,0);
 217 }
 218
 219 opkg_error_t opkg_install_multi_by_name(opkg_conf_t *conf, const char *pkg_name)
 220 {
 221      abstract_pkg_vec_t *providers = pkg_hash_fetch_all_installation_candidates (&conf->pkg_hash, pkg_name);
 222      int i;
 223      opkg_error_t err;
 224      abstract_pkg_t *ppkg ;
 225
 226      if (providers == NULL)
 227           return OPKG_PKG_HAS_NO_CANDIDATE;
 228
 229      for (i = 0; i < providers->len; i++) {
 230           ppkg = abstract_pkg_vec_get(providers, i);
 231           opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_by_name %d \n",__FUNCTION__, i);
 232           err = opkg_install_by_name(conf, ppkg->name);
 233           if (err)
 234                return err;
 235 /* XXX Maybe ppkg should be freed ? */
 236      }
 237      return 0;
 238 }
 239
 240 /*
 241  * Walk dependence graph starting with pkg, collect packages to be
 242  * installed into pkgs_needed, in dependence order.
 243  */
 244 int pkg_mark_dependencies_for_installation(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *pkgs_needed)
 245 {
 246      int i, err;
 247      pkg_vec_t *depends = pkg_vec_alloc();
 248      char **unresolved = NULL;
 249      int ndepends;
 250
 251      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 252                                                         pkg, depends,
 253                                                         &unresolved);
 254
 255      if (unresolved) {
 256           opkg_message(conf, OPKG_ERROR,
 257                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 258                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 259           while (*unresolved) {
 260                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 261                unresolved++;
 262           }
 263           opkg_message(conf, OPKG_ERROR, "\n");
 264           if (! conf->force_depends) {
 265                opkg_message(conf, OPKG_INFO,
 266                             "This could mean that your package list is out of date or that the packages\n"
 267                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 268                             "of this problem try again with the '-force-depends' option.\n");
 269                pkg_vec_free(depends);
 270                return OPKG_PKG_DEPS_UNSATISFIED;
 271           }
 272      }
 273
 274      if (ndepends <= 0) {
 275           pkg_vec_free(depends);
 276           return 0;
 277      }
 278
 279      for (i = 0; i < depends->len; i++) {
 280           pkg_t *dep = depends->pkgs[i];
 281           /* The package was uninstalled when we started, but another
 282              dep earlier in this loop may have depended on it and pulled
 283              it in, so check first. */
 284           if ((dep->state_status != SS_INSTALLED)
 285               && (dep->state_status != SS_UNPACKED)
 286               && (dep->state_want != SW_INSTALL)) {
 287
 288                /* Mark packages as to-be-installed */
 289                dep->state_want = SW_INSTALL;
 290
 291                /* Dependencies should be installed the same place as pkg */
 292                if (dep->dest == NULL) {
 293                     dep->dest = pkg->dest;
 294                }
 295
 296                err = pkg_mark_dependencies_for_installation(conf, dep, pkgs_needed);
 297                if (err) {
 298                     pkg_vec_free(depends);
 299                     return err;
 300                }
 301           }
 302      }
 303      if (pkgs_needed)
 304           pkg_vec_insert(pkgs_needed, pkg);
 305
 306      pkg_vec_free(depends);
 307
 308      return 0;
 309 }
 310
 311 int name_mark_dependencies_for_installation(opkg_conf_t *conf, const char *pkg_name, pkg_vec_t *pkgs_needed)
 312 {
 313      int cmp;
 314      pkg_t *old, *new;
 315      char *old_version, *new_version;
 316
 317      old = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg_name);
 318
 319      new = pkg_hash_fetch_best_installation_candidate_by_name(conf, pkg_name);
 320      if (new == NULL) {
 321           return OPKG_PKG_HAS_NO_CANDIDATE;
 322      }
 323      if (old) {
 324           old_version = pkg_version_str_alloc(old);
 325           new_version = pkg_version_str_alloc(new);
 326
 327           cmp = pkg_compare_versions(old, new);
 328           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 329             opkg_message(conf, OPKG_DEBUG, " Forcing downgrade ");
 330              cmp = -1 ;                                       /* then we force opkg to downgrade */
 331                                                               /* We need to use a value < 0 because in the 0 case we are asking to */
 332                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 333           }
 334           opkg_message(conf, OPKG_DEBUG,
 335                        "comparing visible versions of pkg %s:"
 336                        "\n\t%s is installed "
 337                        "\n\t%s is available "
 338                        "\n\t%d was comparison result\n",
 339                        pkg_name, old_version, new_version, cmp);
 340           if (cmp == 0 && !conf->force_reinstall) {
 341                opkg_message(conf, OPKG_NOTICE,
 342                             "Package %s (%s) installed in %s is up to date.\n",
 343                             old->name, old_version, old->dest->name);
 344                free(old_version);
 345                free(new_version);
 346                return 0;
 347           } else if (cmp > 0) {
 348                opkg_message(conf, OPKG_NOTICE,
 349                             "Not downgrading package %s on %s from %s to %s.\n",
 350                             old->name, old->dest->name, old_version, new_version);
 351                free(old_version);
 352                free(new_version);
 353                return 0;
 354           } else if (cmp < 0) {
 355                new->dest = old->dest;
 356                old->state_want = SW_DEINSTALL;
 357                old->state_flag |= SF_OBSOLETE;
 358           }
 359      }
 360      return pkg_mark_dependencies_for_installation(conf, new, pkgs_needed);
 361 }
 362
 363 \f
 364
 365 int satisfy_dependencies_for(opkg_conf_t *conf, pkg_t *pkg)
 366 {
 367      int i, err;
 368      pkg_vec_t *depends = pkg_vec_alloc();
 369      pkg_t *dep;
 370      char **unresolved = NULL;
 371      int ndepends;
 372
 373      ndepends = pkg_hash_fetch_unsatisfied_dependencies(conf,
 374                                                         pkg, depends,
 375                                                         &unresolved);
 376
 377      if (unresolved) {
 378           opkg_message(conf, OPKG_ERROR,
 379                        "%s: Cannot satisfy the following dependencies for %s:\n\t",
 380                        conf->force_depends ? "Warning" : "ERROR", pkg->name);
 381           while (*unresolved) {
 382                opkg_message(conf, OPKG_ERROR, " %s", *unresolved);
 383                unresolved++;
 384           }
 385           opkg_message(conf, OPKG_ERROR, "\n");
 386           if (! conf->force_depends) {
 387                opkg_message(conf, OPKG_INFO,
 388                             "This could mean that your package list is out of date or that the packages\n"
 389                             "mentioned above do not yet exist (try 'opkg update'). To proceed in spite\n"
 390                             "of this problem try again with the '-force-depends' option.\n");
 391                pkg_vec_free(depends);
 392                return OPKG_PKG_DEPS_UNSATISFIED;
 393           }
 394      }
 395
 396      if (ndepends <= 0) {
 397           pkg_vec_free(depends);
 398           return 0;
 399      }
 400
 401      /* Mark packages as to-be-installed */
 402      for (i=0; i < depends->len; i++) {
 403           /* Dependencies should be installed the same place as pkg */
 404           if (depends->pkgs[i]->dest == NULL) {
 405                depends->pkgs[i]->dest = pkg->dest;
 406           }
 407           depends->pkgs[i]->state_want = SW_INSTALL;
 408      }
 409
 410      for (i = 0; i < depends->len; i++) {
 411           dep = depends->pkgs[i];
 412           /* The package was uninstalled when we started, but another
 413              dep earlier in this loop may have depended on it and pulled
 414              it in, so check first. */
 415           if ((dep->state_status != SS_INSTALLED)
 416               && (dep->state_status != SS_UNPACKED)) {
 417                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 418                err = opkg_install_pkg(conf, dep,0);
 419                /* mark this package as having been automatically installed to
 420                 * satisfy a dependancy */
 421                dep->auto_installed = 1;
 422                if (err) {
 423                     pkg_vec_free(depends);
 424                     return err;
 425                }
 426           }
 427      }
 428
 429      pkg_vec_free(depends);
 430
 431      return 0;
 432 }
 433
 434
 435 /* check all packages have their dependences satisfied, e.g., in case an upgraded package split */
 436 int opkg_satisfy_all_dependences(opkg_conf_t *conf)
 437 {
 438      if (conf->nodeps == 0) {
 439           int i;
 440           pkg_vec_t *installed = pkg_vec_alloc();
 441           pkg_hash_fetch_all_installed(&conf->pkg_hash, installed);
 442           for (i = 0; i < installed->len; i++) {
 443                pkg_t *pkg = installed->pkgs[i];
 444                satisfy_dependencies_for(conf, pkg);
 445           }
 446           pkg_vec_free(installed);
 447      }
 448      return 0;
 449 }
 450
 451 \f
 452
 453 static int check_conflicts_for(opkg_conf_t *conf, pkg_t *pkg)
 454 {
 455      int i;
 456      pkg_vec_t *conflicts = NULL;
 457      int level;
 458      const char *prefix;
 459      if (conf->force_depends) {
 460           level = OPKG_NOTICE;
 461           prefix = "Warning";
 462      } else {
 463           level = OPKG_ERROR;
 464           prefix = "ERROR";
 465      }
 466
 467      if (!conf->force_depends)
 468           conflicts = (pkg_vec_t *)pkg_hash_fetch_conflicts(&conf->pkg_hash, pkg);
 469
 470      if (conflicts) {
 471           opkg_message(conf, level,
 472                        "%s: The following packages conflict with %s:\n\t", prefix, pkg->name);
 473           i = 0;
 474           while (i < conflicts->len)
 475                opkg_message(conf, level, " %s", conflicts->pkgs[i++]->name);
 476           opkg_message(conf, level, "\n");
 477           pkg_vec_free(conflicts);
 478           return OPKG_PKG_DEPS_UNSATISFIED;
 479      }
 480      return 0;
 481 }
 482
 483 static int update_file_ownership(opkg_conf_t *conf, pkg_t *new_pkg, pkg_t *old_pkg)
 484 {
 485      str_list_t *new_list = pkg_get_installed_files(new_pkg);
 486      str_list_elt_t *iter;
 487
 488      for (iter = new_list->head; iter; iter = iter->next) {
 489           char *new_file = iter->data;
 490           pkg_t *owner = file_hash_get_file_owner(conf, new_file);
 491           if (!new_file)
 492                opkg_message(conf, OPKG_ERROR, "Null new_file for new_pkg=%s\n", new_pkg->name);
 493           if (!owner || (owner == old_pkg))
 494                file_hash_set_file_owner(conf, new_file, new_pkg);
 495      }
 496      if (old_pkg) {
 497           str_list_t *old_list = pkg_get_installed_files(old_pkg);
 498           for (iter = old_list->head; iter; iter = iter->next) {
 499                char *old_file = iter->data;
 500                pkg_t *owner = file_hash_get_file_owner(conf, old_file);
 501                if (owner == old_pkg) {
 502                     /* obsolete */
 503                     hash_table_insert(&conf->obs_file_hash, old_file, old_pkg);
 504                }
 505           }
 506      }
 507      return 0;
 508 }
 509
 510 static int verify_pkg_installable(opkg_conf_t *conf, pkg_t *pkg)
 511 {
 512     /* XXX: FEATURE: Anything else needed here? Maybe a check on free space? */
 513
 514     /* sma 6.20.02:  yup; here's the first bit */
 515     /*
 516      * XXX: BUG easy for cworth
 517      * 1) please point the call below to the correct current root destination
 518      * 2) we need to resolve how to check the required space for a pending pkg,
 519      *    my diddling with the .ipk file size below isn't going to cut it.
 520      * 3) return a proper error code instead of 1
 521      */
 522      int comp_size, blocks_available;
 523
 524      if (!conf->force_space && pkg->installed_size != NULL) {
 525           blocks_available = get_available_blocks(conf->default_dest->root_dir);
 526
 527           comp_size = strtoul(pkg->installed_size, NULL, 0);
 528           /* round up a blocks count without doing fancy-but-slow casting jazz */
 529           comp_size = (int)((comp_size + 1023) / 1024);
 530
 531           if (comp_size >= blocks_available) {
 532                opkg_message(conf, OPKG_ERROR,
 533                             "Only have %d available blocks on filesystem %s, pkg %s needs %d\n",
 534                             blocks_available, conf->default_dest->root_dir, pkg->name, comp_size);
 535                return ENOSPC;
 536           }
 537      }
 538      return 0;
 539 }
 540
 541 static int unpack_pkg_control_files(opkg_conf_t *conf, pkg_t *pkg)
 542 {
 543      int err;
 544      char *conffiles_file_name;
 545      char *root_dir;
 546      FILE *conffiles_file;
 547
 548      sprintf_alloc(&pkg->tmp_unpack_dir, "%s/%s-XXXXXX", conf->tmp_dir, pkg->name);
 549
 550      pkg->tmp_unpack_dir = mkdtemp(pkg->tmp_unpack_dir);
 551      if (pkg->tmp_unpack_dir == NULL) {
 552           opkg_message(conf, OPKG_ERROR,
 553                        "%s: Failed to create temporary directory '%s': %s\n",
 554                        __FUNCTION__, pkg->tmp_unpack_dir, strerror(errno));
 555           return errno;
 556      }
 557
 558      err = pkg_extract_control_files_to_dir(pkg, pkg->tmp_unpack_dir);
 559      if (err) {
 560           return err;
 561      }
 562
 563      /* XXX: CLEANUP: There might be a cleaner place to read in the
 564         conffiles. Seems like I should be able to get everything to go
 565         through pkg_init_from_file. If so, maybe it would make sense to
 566         move all of unpack_pkg_control_files to that function. */
 567
 568      /* Don't need to re-read conffiles if we already have it */
 569      if (pkg->conffiles.head) {
 570           return 0;
 571      }
 572
 573      sprintf_alloc(&conffiles_file_name, "%s/conffiles", pkg->tmp_unpack_dir);
 574      if (! file_exists(conffiles_file_name)) {
 575           free(conffiles_file_name);
 576           return 0;
 577      }
 578
 579      conffiles_file = fopen(conffiles_file_name, "r");
 580      if (conffiles_file == NULL) {
 581           fprintf(stderr, "%s: failed to open %s: %s\n",
 582                   __FUNCTION__, conffiles_file_name, strerror(errno));
 583           free(conffiles_file_name);
 584           return errno;
 585      }
 586      free(conffiles_file_name);
 587
 588      while (1) {
 589           char *cf_name;
 590           char *cf_name_in_dest;
 591
 592           cf_name = file_read_line_alloc(conffiles_file);
 593           if (cf_name == NULL) {
 594                break;
 595           }
 596           str_chomp(cf_name);
 597           if (cf_name[0] == '\0') {
 598                continue;
 599           }
 600
 601           /* Prepend dest->root_dir to conffile name.
 602              Take pains to avoid multiple slashes. */
 603           root_dir = pkg->dest->root_dir;
 604           if (conf->offline_root)
 605                /* skip the offline_root prefix */
 606                root_dir = pkg->dest->root_dir + strlen(conf->offline_root);
 607           sprintf_alloc(&cf_name_in_dest, "%s%s", root_dir,
 608                         cf_name[0] == '/' ? (cf_name + 1) : cf_name);
 609
 610           /* Can't get an md5sum now, (file isn't extracted yet).
 611              We'll wait until resolve_conffiles */
 612           conffile_list_append(&pkg->conffiles, cf_name_in_dest, NULL);
 613
 614           free(cf_name);
 615           free(cf_name_in_dest);
 616      }
 617
 618      fclose(conffiles_file);
 619
 620      return 0;
 621 }
 622
 623 /* returns number of installed replacees */
 624 int pkg_get_installed_replacees(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *installed_replacees)
 625 {
 626      abstract_pkg_t **replaces = pkg->replaces;
 627      int replaces_count = pkg->replaces_count;
 628      int i, j;
 629      for (i = 0; i < replaces_count; i++) {
 630           abstract_pkg_t *ab_pkg = replaces[i];
 631           pkg_vec_t *pkg_vec = ab_pkg->pkgs;
 632           if (pkg_vec) {
 633                for (j = 0; j < pkg_vec->len; j++) {
 634                     pkg_t *replacee = pkg_vec->pkgs[j];
 635                     if (!pkg_conflicts(pkg, replacee))
 636                          continue;
 637                     if (replacee->state_status == SS_INSTALLED) {
 638                          pkg_vec_insert(installed_replacees, replacee);
 639                     }
 640                }
 641           }
 642      }
 643      return installed_replacees->len;
 644 }
 645
 646 int pkg_remove_installed_replacees(opkg_conf_t *conf, pkg_vec_t *replacees)
 647 {
 648      int i;
 649      int replaces_count = replacees->len;
 650      for (i = 0; i < replaces_count; i++) {
 651           pkg_t *replacee = replacees->pkgs[i];
 652           int err;
 653           replacee->state_flag |= SF_REPLACE; /* flag it so remove won't complain */
 654           err = opkg_remove_pkg(conf, replacee,0);
 655           if (err)
 656                return err;
 657      }
 658      return 0;
 659 }
 660
 661 /* to unwind the removal: make sure they are installed */
 662 int pkg_remove_installed_replacees_unwind(opkg_conf_t *conf, pkg_vec_t *replacees)
 663 {
 664      int i, err;
 665      int replaces_count = replacees->len;
 666      for (i = 0; i < replaces_count; i++) {
 667           pkg_t *replacee = replacees->pkgs[i];
 668           if (replacee->state_status != SS_INSTALLED) {
 669                opkg_message(conf, OPKG_DEBUG2,"Function: %s calling opkg_install_pkg \n",__FUNCTION__);
 670                err = opkg_install_pkg(conf, replacee,0);
 671                if (err)
 672                     return err;
 673           }
 674      }
 675      return 0;
 676 }
 677
 678 int caught_sigint = 0;
 679 static void opkg_install_pkg_sigint_handler(int sig)
 680 {
 681      caught_sigint = sig;
 682 }
 683
 684 /* compares versions of pkg and old_pkg, returns 0 if OK to proceed with installation of pkg, 1 otherwise */
 685 static int opkg_install_check_downgrade(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg, int message)
 686 {
 687      if (old_pkg) {
 688           char message_out[15];
 689           char *old_version = pkg_version_str_alloc(old_pkg);
 690           char *new_version = pkg_version_str_alloc(pkg);
 691           int cmp = pkg_compare_versions(old_pkg, pkg);
 692           int rc = 0;
 693
 694           memset(message_out,'\x0',15);
 695           strncpy (message_out,"Upgrading ",strlen("Upgrading "));
 696           if ( (conf->force_downgrade==1) && (cmp > 0) ){     /* We've been asked to allow downgrade  and version is precedent */
 697              cmp = -1 ;                                       /* then we force opkg to downgrade */
 698              strncpy (message_out,"Downgrading ",strlen("Downgrading "));         /* We need to use a value < 0 because in the 0 case we are asking to */
 699                                                               /* reinstall, and some check could fail asking the "force-reinstall" option */
 700           }
 701
 702           if (cmp > 0) {
 703                opkg_message(conf, OPKG_NOTICE,
 704                             "Not downgrading package %s on %s from %s to %s.\n",
 705                             old_pkg->name, old_pkg->dest->name, old_version, new_version);
 706                rc = 1;
 707           } else if (cmp < 0) {
 708                opkg_message(conf, OPKG_NOTICE,
 709                             "%s%s on %s from %s to %s...\n",
 710                             message_out, pkg->name, old_pkg->dest->name, old_version, new_version);
 711                pkg->dest = old_pkg->dest;
 712                rc = 0;
 713           } else /* cmp == 0 */ {
 714                if (conf->force_reinstall) {
 715                     opkg_message(conf, OPKG_NOTICE,
 716                                  "Reinstalling %s (%s) on %s...\n",
 717                                  pkg->name, new_version, old_pkg->dest->name);
 718                     pkg->dest = old_pkg->dest;
 719                     rc = 0;
 720                } else {
 721                     opkg_message(conf, OPKG_NOTICE,
 722                                  "Not installing %s (%s) on %s -- already installed.\n",
 723                                  pkg->name, new_version, old_pkg->dest->name);
 724                     rc = 1;
 725                }
 726           }
 727           free(old_version);
 728           free(new_version);
 729           return rc;
 730      } else {
 731       char message_out[15] ;
 732       memset(message_out,'\x0',15);
 733       if ( message )
 734           strncpy( message_out,"Upgrading ",strlen("Upgrading ") );
 735       else
 736           strncpy( message_out,"Installing ",strlen("Installing ") );
 737           char *version = pkg_version_str_alloc(pkg);
 738
 739           opkg_message(conf, OPKG_NOTICE,
 740                        "%s%s (%s) to %s...\n", message_out,
 741                        pkg->name, version, pkg->dest->name);
 742           free(version);
 743           return 0;
 744      }
 745 }
 746
 747 /* and now the meat... */
 748 int opkg_install_pkg(opkg_conf_t *conf, pkg_t *pkg, int from_upgrade)
 749 {
 750      int err = 0;
 751      int message = 0;
 752      pkg_t *old_pkg = NULL;
 753      pkg_vec_t *replacees;
 754      abstract_pkg_t *ab_pkg = NULL;
 755      int old_state_flag;
 756      char* file_md5;
 757      char *pkgid;
 758
 759      if ( from_upgrade )
 760         message = 1;            /* Coming from an upgrade, and should change the output message */
 761
 762      if (!pkg) {
 763           opkg_message(conf, OPKG_ERROR,
 764                        "INTERNAL ERROR: null pkg passed to opkg_install_pkg\n");
 765           return PKG_INSTALL_ERR_INTERNAL;
 766      }
 767
 768      opkg_message(conf, OPKG_DEBUG2, "Function: %s calling pkg_arch_supported %s \n", __FUNCTION__, __FUNCTION__);
 769
 770      if (!pkg_arch_supported(conf, pkg)) {
 771           opkg_message(conf, OPKG_ERROR, "INTERNAL ERROR: architecture %s for pkg %s is unsupported.\n",
 772                        pkg->architecture, pkg->name);
 773           return PKG_INSTALL_ERR_INTERNAL;
 774      }
 775      if (pkg->state_status == SS_INSTALLED && conf->force_reinstall == 0 && conf->nodeps == 0) {
 776           err = satisfy_dependencies_for(conf, pkg);
 777           if (err) { return PKG_INSTALL_ERR_DEPENDENCIES; }
 778
 779           opkg_message(conf, OPKG_NOTICE,
 780                        "Package %s is already installed in %s.\n",
 781                        pkg->name, pkg->dest->name);
 782           return 0;
 783      }
 784
 785      if (pkg->dest == NULL) {
 786           pkg->dest = conf->default_dest;
 787      }
 788
 789      old_pkg = pkg_hash_fetch_installed_by_name(&conf->pkg_hash, pkg->name);
 790
 791      err = opkg_install_check_downgrade(conf, pkg, old_pkg, message);
 792      if (err) { return PKG_INSTALL_ERR_NO_DOWNGRADE; }
 793
 794      pkg->state_want = SW_INSTALL;
 795      if (old_pkg){
 796          old_pkg->state_want = SW_DEINSTALL; /* needed for check_data_file_clashes of dependences */
 797      }
 798
 799
 800      /* Abhaya: conflicts check */
 801      err = check_conflicts_for(conf, pkg);
 802      if (err) { return PKG_INSTALL_ERR_CONFLICTS; }
 803
 804      /* this setup is to remove the upgrade scenario in the end when
 805         installing pkg A, A deps B & B deps on A. So both B and A are
 806         installed. Then A's installation is started resulting in an
 807         uncecessary upgrade */
 808      if (pkg->state_status == SS_INSTALLED
 809          && conf->force_reinstall == 0) return 0;
 810
 811      err = verify_pkg_installable(conf, pkg);
 812      if (err) { return PKG_INSTALL_ERR_NO_SPACE; }
 813
 814      if (pkg->local_filename == NULL) {
 815           err = opkg_download_pkg(conf, pkg, conf->tmp_dir);
 816           if (err) {
 817                opkg_message(conf, OPKG_ERROR,
 818                             "Failed to download %s. Perhaps you need to run 'opkg update'?\n",
 819                             pkg->name);
 820                return PKG_INSTALL_ERR_DOWNLOAD;
 821           }
 822      }
 823
 824      /* check that the repository is valid */
 825      #if HAVE_GPGME
 826      char *list_file_name, *sig_file_name, *lists_dir;
 827
 828      sprintf_alloc (&lists_dir, "%s",
 829                    (conf->restrict_to_default_dest)
 830                     ? conf->default_dest->lists_dir
 831                     : conf->lists_dir);
 832      sprintf_alloc (&list_file_name, "%s/%s", lists_dir, pkg->src->name);
 833      sprintf_alloc (&sig_file_name, "%s/%s.sig", lists_dir, pkg->src->name);
 834
 835      if (file_exists (sig_file_name))
 836      {
 837        if (opkg_verify_file (conf, list_file_name, sig_file_name))
 838          return PKG_INSTALL_ERR_SIGNATURE;
 839      }
 840
 841      free (lists_dir);
 842      free (list_file_name);
 843      free (sig_file_name);
 844      #endif
 845
 846      /* Check for md5 values */
 847      if (pkg->md5sum)
 848      {
 849          file_md5 = file_md5sum_alloc(pkg->local_filename);
 850          if (strcmp(file_md5, pkg->md5sum))
 851          {
 852               opkg_message(conf, OPKG_ERROR,
 853                            "Package %s md5sum mismatch. Either the opkg or the package index are corrupt. Try 'opkg update'.\n",
 854                            pkg->name);
 855               free(file_md5);
 856               return PKG_INSTALL_ERR_MD5;
 857          }
 858          free(file_md5);
 859      }
 860
 861      if (pkg->tmp_unpack_dir == NULL) {
 862           unpack_pkg_control_files(conf, pkg);
 863      }
 864
 865      /* We should update the filelist here, so that upgrades of packages that split will not fail. -Jamey 27-MAR-03 */
 866 /* Pigi: check if it will pass from here when replacing. It seems to fail */
 867 /* That's rather strange that files don't change owner. Investigate !!!!!!*/
 868      err = update_file_ownership(conf, pkg, old_pkg);
 869      if (err) { return PKG_INSTALL_ERR_UNKNOWN; }
 870
 871      if (conf->nodeps == 0) {
 872           err = satisfy_dependencies_for(conf, pkg);
 873           if (err) { return PKG_INSTALL_ERR_DEPENDENCIES; }
 874      }
 875
 876      replacees = pkg_vec_alloc();
 877      pkg_get_installed_replacees(conf, pkg, replacees);
 878
 879      sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 880      opkg_set_current_state (conf, OPKG_STATE_INSTALLING_PKG, pkgid);
 881      free (pkgid);
 882
 883      /* this next section we do with SIGINT blocked to prevent inconsistency between opkg database and filesystem */
 884      {
 885           sigset_t newset, oldset;
 886           sighandler_t old_handler = NULL;
 887           int use_signal = 0;
 888           caught_sigint = 0;
 889           if (use_signal) {
 890                old_handler = signal(SIGINT, opkg_install_pkg_sigint_handler);
 891           } else {
 892                sigemptyset(&newset);
 893                sigaddset(&newset, SIGINT);
 894                sigprocmask(SIG_BLOCK, &newset, &oldset);
 895           }
 896
 897           opkg_state_changed++;
 898           pkg->state_flag |= SF_FILELIST_CHANGED;
 899
 900           /* XXX: BUG: we really should treat replacement more like an upgrade
 901            *      Instead, we're going to remove the replacees
 902            */
 903           err = pkg_remove_installed_replacees(conf, replacees);
 904           if (err) goto UNWIND_REMOVE_INSTALLED_REPLACEES;
 905
 906           err = prerm_upgrade_old_pkg(conf, pkg, old_pkg);
 907           if (err) goto UNWIND_PRERM_UPGRADE_OLD_PKG;
 908
 909           err = prerm_deconfigure_conflictors(conf, pkg, replacees);
 910           if (err) goto UNWIND_PRERM_DECONFIGURE_CONFLICTORS;
 911
 912           err = preinst_configure(conf, pkg, old_pkg);
 913           if (err) goto UNWIND_PREINST_CONFIGURE;
 914
 915           err = backup_modified_conffiles(conf, pkg, old_pkg);
 916           if (err) goto UNWIND_BACKUP_MODIFIED_CONFFILES;
 917
 918           err = check_data_file_clashes(conf, pkg, old_pkg);
 919           if (err) goto UNWIND_CHECK_DATA_FILE_CLASHES;
 920
 921           err = postrm_upgrade_old_pkg(conf, pkg, old_pkg);
 922           if (err) goto UNWIND_POSTRM_UPGRADE_OLD_PKG;
 923
 924           if (conf->noaction) return 0;
 925
 926           /* point of no return: no unwinding after this */
 927           if (old_pkg && !conf->force_reinstall) {
 928                old_pkg->state_want = SW_DEINSTALL;
 929
 930                if (old_pkg->state_flag & SF_NOPRUNE) {
 931                     opkg_message(conf, OPKG_INFO,
 932                                  "  not removing obsolesced files because package marked noprune\n");
 933                } else {
 934                     opkg_message(conf, OPKG_INFO,
 935                                  "  removing obsolesced files\n");
 936                     remove_obsolesced_files(conf, pkg, old_pkg);
 937                }
 938                /* removing files from old package, to avoid ghost files */
 939                remove_data_files_and_list(conf, old_pkg);
 940 /* Pigi : It should be better to remove also maintainer and postrem scripts here, just in case*/
 941                remove_maintainer_scripts_except_postrm(conf, old_pkg);
 942                remove_postrm(conf, old_pkg);
 943 /* Pigi */
 944
 945           }
 946
 947
 948           opkg_message(conf, OPKG_INFO,
 949                        "  installing maintainer scripts\n");
 950           install_maintainer_scripts(conf, pkg, old_pkg);
 951
 952           /* the following just returns 0 */
 953           remove_disappeared(conf, pkg);
 954
 955           opkg_message(conf, OPKG_INFO,
 956                        "  installing data files\n");
 957           install_data_files(conf, pkg);
 958
 959 /* read comments from function for detail but I will execute this here as all other tests are ok.*/
 960           err = check_data_file_clashes_change(conf, pkg, old_pkg);
 961
 962           opkg_message(conf, OPKG_INFO,
 963                        "  resolving conf files\n");
 964           resolve_conffiles(conf, pkg);
 965
 966           pkg->state_status = SS_UNPACKED;
 967           old_state_flag = pkg->state_flag;
 968           pkg->state_flag &= ~SF_PREFER;
 969           opkg_message(conf, OPKG_DEBUG, "   pkg=%s old_state_flag=%x state_flag=%x\n", pkg->name, old_state_flag, pkg->state_flag);
 970
 971           if (old_pkg && !conf->force_reinstall) {
 972                old_pkg->state_status = SS_NOT_INSTALLED;
 973           }
 974
 975           time(&pkg->installed_time);
 976
 977           opkg_message(conf, OPKG_INFO,
 978                        "  cleanup temp files\n");
 979           cleanup_temporary_files(conf, pkg);
 980
 981           ab_pkg = pkg->parent;
 982           if (ab_pkg)
 983                ab_pkg->state_status = pkg->state_status;
 984
 985           opkg_message(conf, OPKG_INFO, "Done.\n");
 986
 987           if (use_signal)
 988                signal(SIGINT, old_handler);
 989           else
 990                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
 991           pkg_vec_free (replacees);
 992           return 0;
 993
 994
 995      UNWIND_POSTRM_UPGRADE_OLD_PKG:
 996           postrm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
 997      UNWIND_CHECK_DATA_FILE_CLASHES:
 998           check_data_file_clashes_unwind(conf, pkg, old_pkg);
 999      UNWIND_BACKUP_MODIFIED_CONFFILES:
1000           backup_modified_conffiles_unwind(conf, pkg, old_pkg);
1001      UNWIND_PREINST_CONFIGURE:
1002           preinst_configure_unwind(conf, pkg, old_pkg);
1003      UNWIND_PRERM_DECONFIGURE_CONFLICTORS:
1004           prerm_deconfigure_conflictors_unwind(conf, pkg, replacees);
1005      UNWIND_PRERM_UPGRADE_OLD_PKG:
1006           prerm_upgrade_old_pkg_unwind(conf, pkg, old_pkg);
1007      UNWIND_REMOVE_INSTALLED_REPLACEES:
1008           pkg_remove_installed_replacees_unwind(conf, replacees);
1009
1010           opkg_message(conf, OPKG_INFO,
1011                        "  cleanup temp files\n");
1012           cleanup_temporary_files(conf, pkg);
1013
1014           opkg_message(conf, OPKG_INFO,
1015                        "Failed.\n");
1016           if (use_signal)
1017                signal(SIGINT, old_handler);
1018           else
1019                sigprocmask(SIG_UNBLOCK, &newset, &oldset);
1020
1021           pkg_vec_free (replacees);
1022           return PKG_INSTALL_ERR_UNKNOWN;
1023      }
1024      opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
1025 }
1026
1027 static int prerm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1028 {
1029      /* DPKG_INCOMPATIBILITY:
1030         dpkg does some things here that we don't do yet. Do we care?
1031
1032         1. If a version of the package is already installed, call
1033            old-prerm upgrade new-version
1034         2. If the script runs but exits with a non-zero exit status
1035            new-prerm failed-upgrade old-version
1036            Error unwind, for both the above cases:
1037            old-postinst abort-upgrade new-version
1038      */
1039      return 0;
1040 }
1041
1042 static int prerm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1043 {
1044      /* DPKG_INCOMPATIBILITY:
1045         dpkg does some things here that we don't do yet. Do we care?
1046         (See prerm_upgrade_old_package for details)
1047      */
1048      return 0;
1049 }
1050
1051 static int prerm_deconfigure_conflictors(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1052 {
1053      /* DPKG_INCOMPATIBILITY:
1054         dpkg does some things here that we don't do yet. Do we care?
1055         2. If a 'conflicting' package is being removed at the same time:
1056                 1. If any packages depended on that conflicting package and
1057                    --auto-deconfigure is specified, call, for each such package:
1058                    deconfigured's-prerm deconfigure \
1059                    in-favour package-being-installed version \
1060                    removing conflicting-package version
1061                 Error unwind:
1062                    deconfigured's-postinst abort-deconfigure \
1063                    in-favour package-being-installed-but-failed version \
1064                    removing conflicting-package version
1065
1066                    The deconfigured packages are marked as requiring
1067                    configuration, so that if --install is used they will be
1068                    configured again if possible.
1069                 2. To prepare for removal of the conflicting package, call:
1070                    conflictor's-prerm remove in-favour package new-version
1071                 Error unwind:
1072                    conflictor's-postinst abort-remove in-favour package new-version
1073      */
1074      return 0;
1075 }
1076
1077 static int prerm_deconfigure_conflictors_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_vec_t *conflictors)
1078 {
1079      /* DPKG_INCOMPATIBILITY: dpkg does some things here that we don't
1080         do yet. Do we care?  (See prerm_deconfigure_conflictors for
1081         details) */
1082      return 0;
1083 }
1084
1085 static int preinst_configure(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1086 {
1087      int err;
1088      char *preinst_args;
1089
1090      if (old_pkg) {
1091           char *old_version = pkg_version_str_alloc(old_pkg);
1092           sprintf_alloc(&preinst_args, "upgrade %s", old_version);
1093           free(old_version);
1094      } else if (pkg->state_status == SS_CONFIG_FILES) {
1095           char *pkg_version = pkg_version_str_alloc(pkg);
1096           sprintf_alloc(&preinst_args, "install %s", pkg_version);
1097           free(pkg_version);
1098      } else {
1099           preinst_args = strdup("install");
1100      }
1101
1102      err = pkg_run_script(conf, pkg, "preinst", preinst_args);
1103      if (err) {
1104           opkg_message(conf, OPKG_ERROR,
1105                        "Aborting installation of %s\n", pkg->name);
1106           return 1;
1107      }
1108
1109      free(preinst_args);
1110
1111      return 0;
1112 }
1113
1114 static int preinst_configure_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1115 {
1116      /* DPKG_INCOMPATIBILITY:
1117         dpkg does the following error unwind, should we?
1118         pkg->postrm abort-upgrade old-version
1119         OR pkg->postrm abort-install old-version
1120         OR pkg->postrm abort-install
1121      */
1122      return 0;
1123 }
1124
1125 static int backup_modified_conffiles(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1126 {
1127      int err;
1128      conffile_list_elt_t *iter;
1129      conffile_t *cf;
1130
1131      if (conf->noaction) return 0;
1132
1133      /* Backup all modified conffiles */
1134      if (old_pkg) {
1135           for (iter = old_pkg->conffiles.head; iter; iter = iter->next) {
1136                char *cf_name;
1137
1138                cf = iter->data;
1139                cf_name = root_filename_alloc(conf, cf->name);
1140
1141                /* Don't worry if the conffile is just plain gone */
1142                if (file_exists(cf_name) && conffile_has_been_modified(conf, cf)) {
1143                     err = backup_make_backup(conf, cf_name);
1144                     if (err) {
1145                          return err;
1146                     }
1147                }
1148                free(cf_name);
1149           }
1150      }
1151
1152      /* Backup all conffiles that were not conffiles in old_pkg */
1153      for (iter = pkg->conffiles.head; iter; iter = iter->next) {
1154           char *cf_name;
1155           cf = iter->data;
1156           cf_name = root_filename_alloc(conf, cf->name);
1157           /* Ignore if this was a conffile in old_pkg as well */
1158           if (pkg_get_conffile(old_pkg, cf->name)) {
1159                continue;
1160           }
1161
1162           if (file_exists(cf_name) && (! backup_exists_for(cf_name))) {
1163                err = backup_make_backup(conf, cf_name);
1164                if (err) {
1165                     return err;
1166                }
1167           }
1168           free(cf_name);
1169      }
1170
1171      return 0;
1172 }
1173
1174 static int backup_modified_conffiles_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1175 {
1176      conffile_list_elt_t *iter;
1177
1178      if (old_pkg) {
1179           for (iter = old_pkg->conffiles.head; iter; iter = iter->next) {
1180                backup_remove(iter->data->name);
1181           }
1182      }
1183
1184      for (iter = pkg->conffiles.head; iter; iter = iter->next) {
1185           backup_remove(iter->data->name);
1186      }
1187
1188      return 0;
1189 }
1190
1191
1192 static int check_data_file_clashes(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1193 {
1194      /* DPKG_INCOMPATIBILITY:
1195         opkg takes a slightly different approach than dpkg at this
1196         point.  dpkg installs each file in the new package while
1197         creating a backup for any file that is replaced, (so that it
1198         can unwind if necessary).  To avoid complexity and redundant
1199         storage, opkg doesn't do any installation until later, (at the
1200         point at which dpkg removes the backups.
1201
1202         But, we do have to check for data file clashes, since after
1203         installing a package with a file clash, removing either of the
1204         packages involved in the clash has the potential to break the
1205         other package.
1206      */
1207      str_list_t *files_list;
1208      str_list_elt_t *iter;
1209
1210      int clashes = 0;
1211
1212      files_list = pkg_get_installed_files(pkg);
1213      for (iter = files_list->head; iter; iter = iter->next) {
1214           char *root_filename;
1215           char *filename = iter->data;
1216           root_filename = root_filename_alloc(conf, filename);
1217           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1218                pkg_t *owner;
1219                pkg_t *obs;
1220                /* Pre-existing conffiles are OK */
1221                /* @@@@ should have way to check that it is a conffile -Jamey */
1222                if (backup_exists_for(root_filename)) {
1223                     continue;
1224                }
1225
1226                /* Pre-existing files are OK if force-overwrite was asserted. */
1227                if (conf->force_overwrite) {
1228                     /* but we need to change who owns this file */
1229                     file_hash_set_file_owner(conf, filename, pkg);
1230                     continue;
1231                }
1232
1233                owner = file_hash_get_file_owner(conf, filename);
1234
1235                /* Pre-existing files are OK if owned by the pkg being upgraded. */
1236                if (owner && old_pkg) {
1237                     if (strcmp(owner->name, old_pkg->name) == 0) {
1238                          continue;
1239                     }
1240                }
1241
1242                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1243                if (owner) {
1244                     opkg_message(conf, OPKG_DEBUG2, "Checking for replaces for %s in package %s\n", filename, owner->name);
1245                     if (pkg_replaces(pkg, owner)) {
1246                          continue;
1247                     }
1248 /* If the file that would be installed is owned by the same package, ( as per a reinstall or similar )
1249    then it's ok to overwrite. */
1250                     if (strcmp(owner->name,pkg->name)==0){
1251                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1252                          continue;
1253                     }
1254                }
1255
1256                /* Pre-existing files are OK if they are obsolete */
1257                obs = hash_table_get(&conf->obs_file_hash, filename);
1258                if (obs) {
1259                     opkg_message(conf, OPKG_INFO, "Pre-exiting file %s is obsolete.  obs_pkg=%s\n", filename, obs->name);
1260                     continue;
1261                }
1262
1263                /* We have found a clash. */
1264                opkg_message(conf, OPKG_ERROR,
1265                             "Package %s wants to install file %s\n"
1266                             "\tBut that file is already provided by package ",
1267                             pkg->name, filename);
1268                if (owner) {
1269                     opkg_message(conf, OPKG_ERROR,
1270                                  "%s\n", owner->name);
1271                } else {
1272                     opkg_message(conf, OPKG_ERROR,
1273                                  "<no package>\nPlease move this file out of the way and try again.\n");
1274                }
1275                clashes++;
1276           }
1277           free(root_filename);
1278      }
1279      pkg_free_installed_files(pkg);
1280
1281      return clashes;
1282 }
1283
1284 static int check_data_file_clashes_change(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1285 {
1286     /* Basically that's the worst hack I could do to be able to change ownership of
1287        file list, but, being that we have no way to unwind the mods, due to structure
1288        of hash table, probably is the quickest hack too, whishing it would not slow-up thing too much.
1289        What we do here is change the ownership of file in hash if a replace ( or similar events
1290        happens )
1291        Only the action that are needed to change name should be considered.
1292        @@@ To change after 1.0 release.
1293      */
1294      str_list_t *files_list;
1295      str_list_elt_t *iter;
1296
1297      int clashes = 0;
1298
1299      files_list = pkg_get_installed_files(pkg);
1300      for (iter = files_list->head; iter; iter = iter->next) {
1301           char *root_filename;
1302           char *filename = iter->data;
1303           root_filename = root_filename_alloc(conf, filename);
1304           if (file_exists(root_filename) && (! file_is_dir(root_filename))) {
1305                pkg_t *owner;
1306
1307                if (conf->force_overwrite) {
1308                     /* but we need to change who owns this file */
1309                     file_hash_set_file_owner(conf, filename, pkg);
1310                     continue;
1311                }
1312
1313                owner = file_hash_get_file_owner(conf, filename);
1314
1315                /* Pre-existing files are OK if owned by a package replaced by new pkg. */
1316                if (owner) {
1317                     if (pkg_replaces(pkg, owner)) {
1318 /* It's now time to change the owner of that file.
1319    It has been "replaced" from the new "Replaces", then I need to inform lists file about that.  */
1320                          opkg_message(conf, OPKG_INFO, "Replacing pre-existing file %s owned by package %s\n", filename, owner->name);
1321                          file_hash_set_file_owner(conf, filename, pkg);
1322                          continue;
1323                     }
1324                }
1325
1326           }
1327           free(root_filename);
1328      }
1329      pkg_free_installed_files(pkg);
1330
1331      return clashes;
1332 }
1333
1334 static int check_data_file_clashes_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1335 {
1336      /* Nothing to do since check_data_file_clashes doesn't change state */
1337      return 0;
1338 }
1339
1340 static int postrm_upgrade_old_pkg(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1341 {
1342      /* DPKG_INCOMPATIBILITY: dpkg does the following here, should we?
1343         1. If the package is being upgraded, call
1344            old-postrm upgrade new-version
1345         2. If this fails, attempt:
1346            new-postrm failed-upgrade old-version
1347         Error unwind, for both cases:
1348            old-preinst abort-upgrade new-version    */
1349      return 0;
1350 }
1351
1352 static int postrm_upgrade_old_pkg_unwind(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1353 {
1354      /* DPKG_INCOMPATIBILITY:
1355         dpkg does some things here that we don't do yet. Do we care?
1356         (See postrm_upgrade_old_pkg for details)
1357      */
1358     return 0;
1359 }
1360
1361 static int remove_obsolesced_files(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1362 {
1363      int err;
1364      str_list_t *old_files;
1365      str_list_elt_t *of;
1366      str_list_t *new_files;
1367      str_list_elt_t *nf;
1368
1369      if (old_pkg == NULL) {
1370           return 0;
1371      }
1372
1373      old_files = pkg_get_installed_files(old_pkg);
1374      new_files = pkg_get_installed_files(pkg);
1375
1376      for (of = old_files->head; of; of = of->next) {
1377           pkg_t *owner;
1378           char *old, *new;
1379           old = of->data;
1380           for (nf = new_files->head; nf; nf = nf->next) {
1381                new = nf->data;
1382                if (strcmp(old, new) == 0) {
1383                     goto NOT_OBSOLETE;
1384                }
1385           }
1386           if (file_is_dir(old)) {
1387                continue;
1388           }
1389           owner = file_hash_get_file_owner(conf, old);
1390           if (owner != old_pkg) {
1391                /* in case obsolete file no longer belongs to old_pkg */
1392                continue;
1393           }
1394
1395           /* old file is obsolete */
1396           opkg_message(conf, OPKG_INFO,
1397                        "    removing obsolete file %s\n", old);
1398           if (!conf->noaction) {
1399                err = unlink(old);
1400                if (err) {
1401                     opkg_message(conf, OPKG_ERROR, "    Warning: remove %s failed: %s\n", old,
1402                                  strerror(errno));
1403                }
1404           }
1405
1406      NOT_OBSOLETE:
1407           ;
1408      }
1409
1410      pkg_free_installed_files(old_pkg);
1411      pkg_free_installed_files(pkg);
1412
1413      return 0;
1414 }
1415
1416 static int remove_obsolete_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1417 {
1418      int i;
1419      int err = 0;
1420      char *globpattern;
1421      glob_t globbuf;
1422      if (0) {
1423           if (!pkg->dest) {
1424                opkg_message(conf, OPKG_ERROR, "%s: no dest for package %s\n", __FUNCTION__, pkg->name);
1425                return -1;
1426           }
1427           sprintf_alloc(&globpattern, "%s/%s.*", pkg->dest->info_dir, pkg->name);
1428           err = glob(globpattern, 0, NULL, &globbuf);
1429           free(globpattern);
1430           if (err) {
1431                return err;
1432           }
1433           /* XXXX this should perhaps only remove the ones that are not overwritten in new package.  Jamey 11/11/2003 */
1434           for (i = 0; i < globbuf.gl_pathc; i++) {
1435                opkg_message(conf, OPKG_DEBUG, "Removing control file %s from old_pkg %s\n",
1436                             globbuf.gl_pathv[i], old_pkg->name);
1437                if (!conf->noaction)
1438                     unlink(globbuf.gl_pathv[i]);
1439           }
1440           globfree(&globbuf);
1441      }
1442      return err;
1443 }
1444
1445 static int install_maintainer_scripts(opkg_conf_t *conf, pkg_t *pkg, pkg_t *old_pkg)
1446 {
1447      int ret;
1448      char *prefix;
1449
1450      if (old_pkg)
1451           remove_obsolete_maintainer_scripts(conf, pkg, old_pkg);
1452      sprintf_alloc(&prefix, "%s.", pkg->name);
1453      ret = pkg_extract_control_files_to_dir_with_prefix(pkg,
1454                                                         pkg->dest->info_dir,
1455                                                         prefix);
1456      free(prefix);
1457      return ret;
1458 }
1459
1460 static int remove_disappeared(opkg_conf_t *conf, pkg_t *pkg)
1461 {
1462      /* DPKG_INCOMPATIBILITY:
1463         This is a fairly sophisticated dpkg operation. Shall we
1464         skip it? */
1465
1466      /* Any packages all of whose files have been overwritten during the
1467         installation, and which aren't required for dependencies, are
1468         considered to have been removed. For each such package
1469         1. disappearer's-postrm disappear overwriter overwriter-version
1470         2. The package's maintainer scripts are removed
1471         3. It is noted in the status database as being in a sane state,
1472            namely not installed (any conffiles it may have are ignored,
1473            rather than being removed by dpkg). Note that disappearing
1474            packages do not have their prerm called, because dpkg doesn't
1475            know in advance that the package is going to vanish.
1476      */
1477      return 0;
1478 }
1479
1480 static int install_data_files(opkg_conf_t *conf, pkg_t *pkg)
1481 {
1482      int err;
1483
1484      /* opkg takes a slightly different approach to data file backups
1485         than dpkg. Rather than removing backups at this point, we
1486         actually do the data file installation now. See comments in
1487         check_data_file_clashes() for more details. */
1488
1489      opkg_message(conf, OPKG_INFO,
1490                   "    extracting data files to %s\n", pkg->dest->root_dir);
1491      err = pkg_extract_data_files_to_dir(pkg, pkg->dest->root_dir);
1492      if (err) {
1493           return err;
1494      }
1495
1496      /* XXX: BUG or FEATURE : We are actually loosing the Essential flag,
1497         so we can't save ourself from removing important packages
1498         At this point we (should) have extracted the .control file, so it
1499         would be a good idea to reload the data in it, and set the Essential
1500         state in *pkg. From now on the Essential is back in status file and
1501         we can protect again.
1502         We should operate this way:
1503         fopen the file ( pkg->dest->root_dir/pkg->name.control )
1504         check for "Essential" in it
1505         set the value in pkg->essential.
1506         This new routine could be useful also for every other flag
1507         Pigi: 16/03/2004 */
1508      set_flags_from_control(conf, pkg) ;
1509
1510      opkg_message(conf, OPKG_DEBUG, "    Calling pkg_write_filelist from %s\n", __FUNCTION__);
1511      err = pkg_write_filelist(conf, pkg);
1512      if (err)
1513           return err;
1514
1515      /* XXX: FEATURE: opkg should identify any files which existed
1516         before installation and which were overwritten, (see
1517         check_data_file_clashes()). What it must do is remove any such
1518         files from the filelist of the old package which provided the
1519         file. Otherwise, if the old package were removed at some point
1520         it would break the new package. Removing the new package will
1521         also break the old one, but this cannot be helped since the old
1522         package's file has already been deleted. This is the importance
1523         of check_data_file_clashes(), and only allowing opkg to install
1524         a clashing package with a user force. */
1525
1526      return 0;
1527 }
1528
1529 static int resolve_conffiles(opkg_conf_t *conf, pkg_t *pkg)
1530 {
1531      conffile_list_elt_t *iter;
1532      conffile_t *cf;
1533      char *cf_backup;
1534
1535     char *md5sum;
1536
1537
1538      if (conf->noaction) return 0;
1539
1540      for (iter = pkg->conffiles.head; iter; iter = iter->next) {
1541           char *root_filename;
1542           cf = iter->data;
1543           root_filename = root_filename_alloc(conf, cf->name);
1544
1545           /* Might need to initialize the md5sum for each conffile */
1546           if (cf->value == NULL) {
1547                cf->value = file_md5sum_alloc(root_filename);
1548           }
1549
1550           if (!file_exists(root_filename)) {
1551                free(root_filename);
1552                continue;
1553           }
1554
1555           cf_backup = backup_filename_alloc(root_filename);
1556
1557
1558           if (file_exists(cf_backup)) {
1559  /* Let's compute md5 to test if files are changed */
1560               md5sum = file_md5sum_alloc(cf_backup);
1561                if (strcmp( cf->value,md5sum) != 0 ) {
1562                   if (conf->force_defaults
1563                       || user_prefers_old_conffile(cf->name, cf_backup) ) {
1564                        rename(cf_backup, root_filename);
1565                   }
1566                }
1567                unlink(cf_backup);
1568                free(md5sum);
1569           }
1570
1571           free(cf_backup);
1572           free(root_filename);
1573      }
1574
1575      return 0;
1576 }
1577
1578 static int user_prefers_old_conffile(const char *file_name, const char *backup)
1579 {
1580      char *response;
1581      const char *short_file_name;
1582
1583      short_file_name = strrchr(file_name, '/');
1584      if (short_file_name) {
1585           short_file_name++;
1586      } else {
1587           short_file_name = file_name;
1588      }
1589
1590      while (1) {
1591           response = get_user_response("    Configuration file '%s'\n"
1592                                        "    ==> File on system created by you or by a script.\n"
1593                                        "    ==> File also in package provided by package maintainer.\n"
1594                                        "       What would you like to do about it ?  Your options are:\n"
1595                                        "        Y or I  : install the package maintainer's version\n"
1596                                        "        N or O  : keep your currently-installed version\n"
1597                                        "          D     : show the differences between the versions (if diff is installed)\n"
1598                                        "     The default action is to keep your current version.\n"
1599                                        "    *** %s (Y/I/N/O/D) [default=N] ? ", file_name, short_file_name);
1600           if (strcmp(response, "y") == 0
1601               || strcmp(response, "i") == 0
1602               || strcmp(response, "yes") == 0) {
1603                free(response);
1604                return 0;
1605           }
1606
1607           if (strcmp(response, "d") == 0) {
1608                char *cmd;
1609
1610                free(response);
1611                /* XXX: BUG rewrite to use exec or busybox's internal diff */
1612                sprintf_alloc(&cmd, "diff -u %s %s", backup, file_name);
1613                xsystem(cmd);
1614                free(cmd);
1615                printf("    [Press ENTER to continue]\n");
1616                response = file_read_line_alloc(stdin);
1617                free(response);
1618                continue;
1619           }
1620
1621           free(response);
1622           return 1;
1623      }
1624 }
1625
1626 /* XXX: CLEANUP: I'd like to move all of the code for
1627    creating/cleaning pkg->tmp_unpack_dir directly into pkg.c. (Then,
1628    it would make sense to cleanup pkg->tmp_unpack_dir directly from
1629    pkg_deinit for example). */
1630 static int cleanup_temporary_files(opkg_conf_t *conf, pkg_t *pkg)
1631 {
1632      DIR *tmp_dir;
1633      struct dirent *dirent;
1634      char *tmp_file;
1635
1636 #ifdef OPKG_DEBUG_NO_TMP_CLEANUP
1637 #error
1638      opkg_message(conf, OPKG_DEBUG,
1639                   "%s: Not cleaning up %s since opkg compiled with OPKG_DEBUG_NO_TMP_CLEANUP\n",
1640                   __FUNCTION__, pkg->tmp_unpack_dir);
1641      return 0;
1642 #endif
1643
1644      if (pkg->tmp_unpack_dir && file_is_dir(pkg->tmp_unpack_dir)) {
1645           tmp_dir = opendir(pkg->tmp_unpack_dir);
1646           if (tmp_dir) {
1647                while (1) {
1648                     dirent = readdir(tmp_dir);
1649                     if (dirent == NULL) {
1650                          break;
1651                     }
1652                     sprintf_alloc(&tmp_file, "%s/%s",
1653                                   pkg->tmp_unpack_dir, dirent->d_name);
1654                     if (! file_is_dir(tmp_file)) {
1655                          unlink(tmp_file);
1656                     }
1657                     free(tmp_file);
1658                }
1659                closedir(tmp_dir);
1660                rmdir(pkg->tmp_unpack_dir);
1661                free(pkg->tmp_unpack_dir);
1662                pkg->tmp_unpack_dir = NULL;
1663           }
1664      }
1665
1666      opkg_message(conf, OPKG_INFO, "cleanup_temporary_files: pkg=%s local_filename=%s tmp_dir=%s\n",
1667                   pkg->name, pkg->local_filename, conf->tmp_dir);
1668      if (pkg->local_filename && strncmp(pkg->local_filename, conf->tmp_dir, strlen(conf->tmp_dir)) == 0) {
1669           unlink(pkg->local_filename);
1670           free(pkg->local_filename);
1671           pkg->local_filename = NULL;
1672      }
1673
1674      return 0;
1675 }
1676
1677 static char *backup_filename_alloc(const char *file_name)
1678 {
1679      char *backup;
1680
1681      sprintf_alloc(&backup, "%s%s", file_name, OPKG_BACKUP_SUFFIX);
1682
1683      return backup;
1684 }
1685
1686 int backup_make_backup(opkg_conf_t *conf, const char *file_name)
1687 {
1688      int err;
1689      char *backup;
1690
1691      backup = backup_filename_alloc(file_name);
1692      err = file_copy(file_name, backup);
1693      if (err) {
1694           opkg_message(conf, OPKG_ERROR,
1695                        "%s: Failed to copy %s to %s\n",
1696                        __FUNCTION__, file_name, backup);
1697      }
1698
1699      free(backup);
1700
1701      return err;
1702 }
1703
1704 static int backup_exists_for(const char *file_name)
1705 {
1706      int ret;
1707      char *backup;
1708
1709      backup = backup_filename_alloc(file_name);
1710
1711      ret = file_exists(backup);
1712
1713      free(backup);
1714
1715      return ret;
1716 }
1717
1718 static int backup_remove(const char *file_name)
1719 {
1720      char *backup;
1721
1722      backup = backup_filename_alloc(file_name);
1723      unlink(backup);
1724      free(backup);
1725
1726      return 0;
1727 }
1728