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 <stdio.h>
  20 #include <stdlib.h>
  21
  22 #include "opkg_install.h"
  23 #include "opkg_upgrade.h"
  24 #include "opkg_message.h"
  25
  26 int
  27 opkg_upgrade_pkg(pkg_t *old)
  28 {
  29      pkg_t *new;
  30      int cmp;
  31      char *old_version, *new_version;
  32
  33      if (old->state_flag & SF_HOLD) {
  34           opkg_msg(NOTICE, "Not upgrading package %s which is marked "
  35                        "hold (flags=%#x).\n", old->name, old->state_flag);
  36           return 0;
  37      }
  38
  39      new = pkg_hash_fetch_best_installation_candidate_by_name(old->name);
  40      if (new == NULL) {
  41           old_version = pkg_version_str_alloc(old);
  42           opkg_msg(NOTICE, "Assuming locally installed package %s (%s) "
  43                        "is up to date.\n", old->name, old_version);
  44           free(old_version);
  45           return 0;
  46      }
  47
  48      old_version = pkg_version_str_alloc(old);
  49      new_version = pkg_version_str_alloc(new);
  50
  51      cmp = pkg_compare_versions(old, new);
  52      opkg_msg(DEBUG, "Comparing visible versions of pkg %s:"
  53                   "\n\t%s is installed "
  54                   "\n\t%s is available "
  55                   "\n\t%d was comparison result\n",
  56                   old->name, old_version, new_version, cmp);
  57      if (cmp == 0) {
  58           opkg_msg(INFO, "Package %s (%s) installed in %s is up to date.\n",
  59                        old->name, old_version, old->dest->name);
  60           free(old_version);
  61           free(new_version);
  62           return 0;
  63      } else if (cmp > 0) {
  64           opkg_msg(NOTICE, "Not downgrading package %s on %s from %s to %s.\n",
  65                        old->name, old->dest->name, old_version, new_version);
  66           free(old_version);
  67           free(new_version);
  68           return 0;
  69      } else if (cmp < 0) {
  70           new->dest = old->dest;
  71           old->state_want = SW_DEINSTALL;
  72      }
  73
  74     free(old_version);
  75     free(new_version);
  76     new->state_flag |= SF_USER;
  77     return opkg_install_pkg(new,1);
  78 }
  79
  80
  81 static void
  82 pkg_hash_check_installed_pkg_helper(const char *pkg_name, void *entry,
  83                 void *data)
  84 {
  85         struct active_list *head = (struct active_list *) data;
  86         abstract_pkg_t *ab_pkg = (abstract_pkg_t *)entry;
  87         pkg_vec_t *pkg_vec = ab_pkg->pkgs;
  88         int j;
  89
  90         if (!pkg_vec)
  91                 return;
  92
  93         for (j = 0; j < pkg_vec->len; j++) {
  94                 pkg_t *pkg = pkg_vec->pkgs[j];
  95                 if (pkg->state_status == SS_INSTALLED
  96                                 || pkg->state_status == SS_UNPACKED)
  97                         active_list_add(head, &pkg->list);
  98         }
  99 }
 100
 101 struct active_list *
 102 prepare_upgrade_list(void)
 103 {
 104     struct active_list *head = active_list_head_new();
 105     struct active_list *all = active_list_head_new();
 106     struct active_list *node=NULL;
 107
 108     /* ensure all data is valid */
 109     pkg_info_preinstall_check();
 110
 111     hash_table_foreach(&conf->pkg_hash, pkg_hash_check_installed_pkg_helper, all);
 112     for (node=active_list_next(all,all); node; node = active_list_next(all, node)) {
 113         pkg_t *old, *new;
 114         int cmp;
 115
 116         old = list_entry(node, pkg_t, list);
 117         new = pkg_hash_fetch_best_installation_candidate_by_name(old->name);
 118
 119         if (new == NULL)
 120             continue;
 121
 122         cmp = pkg_compare_versions(old, new);
 123
 124         if ( cmp < 0 ) {
 125            node = active_list_move_node(all, head, &old->list);
 126         }
 127     }
 128     active_list_head_delete(all);
 129     return head;
 130 }