libopkg/opkg_upgrade.c

   1 /* opkg_upgrade.c - the opkg package management system
   2
   3    Carl D. Worth
   4    Copyright (C) 2001 University of Southern California
   5
   6    Copyright (C) 2003 Daniele Nicolodi <daniele@grinta.net>
   7
   8    This program is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU General Public License as
  10    published by the Free Software Foundation; either version 2, or (at
  11    your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful, but
  14    WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    General Public License for more details.
  17 */
  18
  19 #include "includes.h"
  20 #include "opkg_install.h"
  21 #include "opkg_upgrade.h"
  22 #include "opkg_message.h"
  23
  24 int
  25 opkg_upgrade_pkg(pkg_t *old)
  26 {
  27      pkg_t *new;
  28      int cmp;
  29      char *old_version, *new_version;
  30
  31      if (old->state_flag & SF_HOLD) {
  32           opkg_msg(NOTICE, "Not upgrading package %s which is marked "
  33                        "hold (flags=%#x).\n", old->name, old->state_flag);
  34           return 0;
  35      }
  36
  37      new = pkg_hash_fetch_best_installation_candidate_by_name(old->name);
  38      if (new == NULL) {
  39           old_version = pkg_version_str_alloc(old);
  40           opkg_msg(NOTICE, "Assuming locally installed package %s (%s) "
  41                        "is up to date.\n", old->name, old_version);
  42           free(old_version);
  43           return 0;
  44      }
  45
  46      old_version = pkg_version_str_alloc(old);
  47      new_version = pkg_version_str_alloc(new);
  48
  49      cmp = pkg_compare_versions(old, new);
  50      opkg_msg(DEBUG, "Comparing visible versions of pkg %s:"
  51                   "\n\t%s is installed "
  52                   "\n\t%s is available "
  53                   "\n\t%d was comparison result\n",
  54                   old->name, old_version, new_version, cmp);
  55      if (cmp == 0) {
  56           opkg_msg(INFO, "Package %s (%s) installed in %s is up to date.\n",
  57                        old->name, old_version, old->dest->name);
  58           free(old_version);
  59           free(new_version);
  60           return 0;
  61      } else if (cmp > 0) {
  62           opkg_msg(NOTICE, "Not downgrading package %s on %s from %s to %s.\n",
  63                        old->name, old->dest->name, old_version, new_version);
  64           free(old_version);
  65           free(new_version);
  66           return 0;
  67      } else if (cmp < 0) {
  68           new->dest = old->dest;
  69           old->state_want = SW_DEINSTALL;
  70      }
  71
  72     free(old_version);
  73     free(new_version);
  74     new->state_flag |= SF_USER;
  75     return opkg_install_pkg(new,1);
  76 }
  77
  78
  79 static void
  80 pkg_hash_check_installed_pkg_helper(const char *pkg_name, void *entry,
  81                 void *data)
  82 {
  83         struct active_list *head = (struct active_list *) data;
  84         abstract_pkg_t *ab_pkg = (abstract_pkg_t *)entry;
  85         pkg_vec_t *pkg_vec = ab_pkg->pkgs;
  86         int j;
  87
  88         if (!pkg_vec)
  89                 return;
  90
  91         for (j = 0; j < pkg_vec->len; j++) {
  92                 pkg_t *pkg = pkg_vec->pkgs[j];
  93                 if (pkg->state_status == SS_INSTALLED
  94                                 || pkg->state_status == SS_UNPACKED)
  95                         active_list_add(head, &pkg->list);
  96         }
  97 }
  98
  99 struct active_list *
 100 prepare_upgrade_list(void)
 101 {
 102     struct active_list *head = active_list_head_new();
 103     struct active_list *all = active_list_head_new();
 104     struct active_list *node=NULL;
 105
 106     /* ensure all data is valid */
 107     pkg_info_preinstall_check();
 108
 109     hash_table_foreach(&conf->pkg_hash, pkg_hash_check_installed_pkg_helper, all);
 110     for (node=active_list_next(all,all); node; node = active_list_next(all, node)) {
 111         pkg_t *old, *new;
 112         int cmp;
 113
 114         old = list_entry(node, pkg_t, list);
 115         new = pkg_hash_fetch_best_installation_candidate_by_name(old->name);
 116
 117         if (new == NULL)
 118             continue;
 119
 120         cmp = pkg_compare_versions(old, new);
 121
 122         if ( cmp < 0 ) {
 123            node = active_list_move_node(all, head, &old->list);
 124         }
 125     }
 126     active_list_head_delete(all);
 127     return head;
 128 }