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Diffstat (limited to 'libcaja-private/caja-users-groups-cache.c')
-rw-r--r--libcaja-private/caja-users-groups-cache.c295
1 files changed, 0 insertions, 295 deletions
diff --git a/libcaja-private/caja-users-groups-cache.c b/libcaja-private/caja-users-groups-cache.c
deleted file mode 100644
index 9e579f5e..00000000
--- a/libcaja-private/caja-users-groups-cache.c
+++ /dev/null
@@ -1,295 +0,0 @@
-/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
-
- caja-users-groups-cache.c: cache of users' and groups' names.
-
- Copyright (C) 2006 Zbigniew Chyla
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public
- License along with this program; if not, write to the
- Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
- Boston, MA 02110-1301, USA.
-
- Author: Zbigniew Chyla <[email protected]>
-*/
-
-#include <config.h>
-#include "caja-users-groups-cache.h"
-
-#include <glib.h>
-#include <grp.h>
-#include <pwd.h>
-
-
-typedef struct _ExpiringCache ExpiringCache;
-
-/* times in seconds */
-#define USERS_CACHE_EXPIRE_TIME 60
-#define GROUPS_CACHE_EXPIRE_TIME 60
-
-/* cache of users' names */
-static ExpiringCache *users_cache = NULL;
-
-/* cache of groups' names */
-static ExpiringCache *groups_cache = NULL;
-
-
-/**
- * Generic implementation of cache with guint keys and values which expire
- * after specified amount of time.
- */
-
-typedef gpointer (*ExpiringCacheGetValFunc) (guint key);
-
-
-struct _ExpiringCache
-{
- /* Expiration time of cached value */
- time_t expire_time;
-
- /* Called to obtain a value by a key */
- ExpiringCacheGetValFunc get_value_func;
-
- /* Called to destroy a value */
- GDestroyNotify value_destroy_func;
-
- /* Stores cached values */
- GHashTable *cached_values;
-};
-
-
-typedef struct _ExpiringCacheEntry ExpiringCacheEntry;
-
-struct _ExpiringCacheEntry
-{
- ExpiringCache *cache;
- guint key;
- gpointer value;
-};
-
-
-static ExpiringCache *
-expiring_cache_new (time_t expire_time, ExpiringCacheGetValFunc get_value_func,
- GDestroyNotify value_destroy_func)
-{
- ExpiringCache *cache;
-
- g_assert (get_value_func != NULL);
-
- cache = g_new (ExpiringCache, 1);
- cache->expire_time = expire_time;
- cache->get_value_func = get_value_func;
- cache->value_destroy_func = value_destroy_func;
- cache->cached_values = g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL, NULL);
-
- return cache;
-}
-
-static ExpiringCacheEntry *
-expiring_cache_entry_new (ExpiringCache *cache, guint key, gpointer value)
-{
- ExpiringCacheEntry *entry;
-
- entry = g_slice_new (ExpiringCacheEntry);
- entry->cache = cache;
- entry->key = key;
- entry->value = value;
-
- return entry;
-}
-
-static void
-expiring_cache_entry_destroy (ExpiringCacheEntry *entry)
-{
- if (entry->cache->value_destroy_func != NULL)
- {
- entry->cache->value_destroy_func (entry->value);
- }
- g_slice_free (ExpiringCacheEntry, entry);
-}
-
-static gboolean
-cb_cache_entry_expired (ExpiringCacheEntry *entry)
-{
- g_hash_table_remove (entry->cache->cached_values, GSIZE_TO_POINTER (entry->key));
- expiring_cache_entry_destroy (entry);
-
- return FALSE;
-}
-
-static gpointer
-expiring_cache_get_value (ExpiringCache *cache, guint key)
-{
- ExpiringCacheEntry *entry;
-
- g_assert (cache != NULL);
-
- if (!g_hash_table_lookup_extended (cache->cached_values, GSIZE_TO_POINTER (key),
- NULL, (gpointer) &entry))
- {
- entry = expiring_cache_entry_new (cache, key, cache->get_value_func (key));
- g_hash_table_insert (cache->cached_values, GSIZE_TO_POINTER (key), entry);
- g_timeout_add_seconds (cache->expire_time, (GSourceFunc) cb_cache_entry_expired, entry);
- }
-
- return entry->value;
-}
-
-
-/*
- * Cache of users' names based on ExpiringCache.
- */
-
-typedef struct _UserInfo UserInfo;
-
-struct _UserInfo
-{
- char *name;
- char *gecos;
-};
-
-
-static UserInfo *
-user_info_new (struct passwd *password_info)
-{
- UserInfo *uinfo;
-
- if (password_info != NULL)
- {
- uinfo = g_slice_new (UserInfo);
- uinfo->name = g_strdup (password_info->pw_name);
- uinfo->gecos = g_strdup (password_info->pw_gecos);
- }
- else
- {
- uinfo = NULL;
- }
-
- return uinfo;
-}
-
-static void
-user_info_free (UserInfo *uinfo)
-{
- if (uinfo != NULL)
- {
- g_free (uinfo->name);
- g_free (uinfo->gecos);
- g_slice_free (UserInfo, uinfo);
- }
-}
-
-static gpointer
-users_cache_get_value (guint key)
-{
- return user_info_new (getpwuid (key));
-}
-
-static UserInfo *
-get_cached_user_info(guint uid)
-{
- if (users_cache == NULL)
- {
- users_cache = expiring_cache_new (USERS_CACHE_EXPIRE_TIME, users_cache_get_value,
- (GDestroyNotify) user_info_free);
- }
-
- return expiring_cache_get_value (users_cache, uid);
-}
-
-/**
- * caja_users_cache_get_name:
- *
- * Returns name of user with given uid (using cached data if possible) or
- * NULL in case a user with given uid can't be found.
- *
- * Returns: Newly allocated string or NULL.
- */
-char *
-caja_users_cache_get_name (uid_t uid)
-{
- UserInfo *uinfo;
-
- uinfo = get_cached_user_info (uid);
- if (uinfo != NULL)
- {
- return g_strdup (uinfo->name);
- }
- else
- {
- return NULL;
- }
-}
-
-/**
- * caja_users_cache_get_gecos:
- *
- * Returns gecos of user with given uid (using cached data if possible) or
- * NULL in case a user with given uid can't be found.
- *
- * Returns: Newly allocated string or NULL.
- */
-char *
-caja_users_cache_get_gecos (uid_t uid)
-{
- UserInfo *uinfo;
-
- uinfo = get_cached_user_info (uid);
- if (uinfo != NULL)
- {
- return g_strdup (uinfo->gecos);
- }
- else
- {
- return NULL;
- }
-}
-
-/*
- * Cache of groups' names based on ExpiringCache.
- */
-
-static gpointer
-groups_cache_get_value (guint key)
-{
- struct group *group_info;
-
- group_info = getgrgid (GPOINTER_TO_SIZE (key));
- if (group_info != NULL)
- {
- return g_strdup (group_info->gr_name);
- }
- else
- {
- return NULL;
- }
-}
-
-
-/**
- * caja_groups_cache_get_name:
- *
- * Returns name of group with given gid (using cached data if possible) or
- * NULL in case a group with given gid can't be found.
- *
- * Returns: Newly allocated string or NULL.
- */
-char *
-caja_groups_cache_get_name (gid_t gid)
-{
- if (groups_cache == NULL)
- {
- groups_cache = expiring_cache_new (GROUPS_CACHE_EXPIRE_TIME, groups_cache_get_value, g_free);
- }
-
- return g_strdup (expiring_cache_get_value (groups_cache, gid));
-}
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