Commit 0a32dd8d authored by Cosimo Cecchi's avatar Cosimo Cecchi

users-group-cache: nuke this, as it appears to be unused

parent b11c8a69
......@@ -186,8 +186,6 @@ libnautilus_private_la_SOURCES = \
nautilus-undo-transaction.h \
nautilus-undo.c \
nautilus-undo.h \
nautilus-users-groups-cache.c \
nautilus-users-groups-cache.h \
nautilus-vfs-directory.c \
nautilus-vfs-directory.h \
nautilus-vfs-file.c \
......
......@@ -43,7 +43,6 @@
#include "nautilus-search-directory.h"
#include "nautilus-search-directory-file.h"
#include "nautilus-thumbnails.h"
#include "nautilus-users-groups-cache.h"
#include "nautilus-vfs-file.h"
#include "nautilus-saved-search-file.h"
#include <eel/eel-debug.h>
......
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
nautilus-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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Zbigniew Chyla <mail@zbigniew.chyla.pl>
*/
#include <config.h>
#include "nautilus-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);
}
/**
* nautilus_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 *
nautilus_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;
}
}
/**
* nautilus_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 *
nautilus_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;
}
}
/**
* nautilus_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 *
nautilus_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));
}
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
nautilus-users-groups-cache.h: 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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Zbigniew Chyla <mail@zbigniew.chyla.pl>
*/
#ifndef NAUTILUS_USERS_GROUPS_CACHE_H
#define NAUTILUS_USERS_GROUPS_CACHE_H
#include <sys/types.h>
char *nautilus_users_cache_get_name (uid_t uid);
char *nautilus_users_cache_get_gecos (uid_t uid);
char *nautilus_groups_cache_get_name (gid_t gid);
#endif /* NAUTILUS_USERS_GROUPS_CACHE_H */
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