lib/dpkg/pkg-files.c

   1 /*
   2  * libdpkg - Debian packaging suite library routines
   3  * pkg-files.c - handle list of filesystem files per package
   4  *
   5  * Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
   6  * Copyright © 2000,2001 Wichert Akkerman <wakkerma@debian.org>
   7  * Copyright © 2008-2014 Guillem Jover <guillem@debian.org>
   8  *
   9  * This is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  21  */
  22
  23 #include <config.h>
  24 #include <compat.h>
  25
  26 #include <dpkg/i18n.h>
  27 #include <dpkg/dpkg.h>
  28 #include <dpkg/dpkg-db.h>
  29 #include <dpkg/pkg-list.h>
  30 #include <dpkg/pkg-files.h>
  31
  32 /**
  33  * Erase the files saved in pkg.
  34  */
  35 void
  36 pkg_files_blank(struct pkginfo *pkg)
  37 {
  38         struct fsys_namenode_list *current;
  39
  40         for (current = pkg->files;
  41              current;
  42              current = current->next) {
  43                 struct pkg_list **pkg_prev = &current->namenode->packages;
  44                 struct pkg_list *pkg_node;
  45
  46                 /* For each file that used to be in the package, go through
  47                  * looking for this package's entry in the list of packages
  48                  * containing this file, and blank it out. */
  49                 for (pkg_node = current->namenode->packages;
  50                      pkg_node;
  51                      pkg_node = pkg_node->next) {
  52                         if (pkg_node->pkg == pkg) {
  53                                 *pkg_prev = pkg_node->next;
  54
  55                                 /* The actual filelist links were allocated
  56                                  * w/ nfmalloc, so we should not free them. */
  57                                 break;
  58                         }
  59
  60                         pkg_prev = &pkg_node->next;
  61                 }
  62         }
  63         pkg->files = NULL;
  64 }
  65
  66 struct fsys_namenode_list **
  67 pkg_files_add_file(struct pkginfo *pkg, struct fsys_namenode *namenode,
  68                    struct fsys_namenode_list **file_tail)
  69 {
  70         struct fsys_namenode_list *newent;
  71         struct pkg_list *pkg_node;
  72
  73         if (file_tail == NULL)
  74                 file_tail = &pkg->files;
  75
  76         /* Make sure we're at the end. */
  77         while ((*file_tail) != NULL)
  78                 file_tail = &((*file_tail)->next);
  79
  80         /* Create a new node. */
  81         newent = nfmalloc(sizeof(*newent));
  82         newent->namenode = namenode;
  83         newent->next = NULL;
  84         *file_tail = newent;
  85         file_tail = &newent->next;
  86
  87         /* Add pkg to newent's package list. */
  88         pkg_node = nfmalloc(sizeof(*pkg_node));
  89         pkg_node->pkg = pkg;
  90         pkg_node->next = newent->namenode->packages;
  91         newent->namenode->packages = pkg_node;
  92
  93         /* Return the position for the next guy. */
  94         return file_tail;
  95 }