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glib/gio/gkeyfilesettingsbackend.c
Philip Withnall 5942cd7984 gio: Add SPDX license headers automatically 
Add SPDX license (but not copyright) headers to all files which follow a
certain pattern in their existing non-machine-readable header comment.

This commit was entirely generated using the command:
```
git ls-files gio/*.[ch] | xargs perl -0777 -pi -e 's/\n \*\n \* This library is free software; you can redistribute it and\/or\n \* modify it under the terms of the GNU Lesser General Public/\n \*\n \* SPDX-License-Identifier: LGPL-2.1-or-later\n \*\n \* This library is free software; you can redistribute it and\/or\n \* modify it under the terms of the GNU Lesser General Public/igs'
```

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Helps: #1415
2022-05-18 09:18:52 +01:00

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/*
* Copyright © 2010 Codethink Limited
* Copyright © 2010 Novell, Inc.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Authors: Vincent Untz <vuntz@gnome.org>
* Ryan Lortie <desrt@desrt.ca>
*/
#include "config.h"
#include <glib.h>
#include <glibintl.h>
#include <stdio.h>
#include <string.h>
#include "gfile.h"
#include "gfileinfo.h"
#include "gfileenumerator.h"
#include "gfilemonitor.h"
#include "gsimplepermission.h"
#include "gsettingsbackendinternal.h"
#include "giomodule-priv.h"
#include "gportalsupport.h"
#define G_TYPE_KEYFILE_SETTINGS_BACKEND (g_keyfile_settings_backend_get_type ())
#define G_KEYFILE_SETTINGS_BACKEND(inst) (G_TYPE_CHECK_INSTANCE_CAST ((inst), \
G_TYPE_KEYFILE_SETTINGS_BACKEND, \
GKeyfileSettingsBackend))
#define G_IS_KEYFILE_SETTINGS_BACKEND(inst) (G_TYPE_CHECK_INSTANCE_TYPE ((inst), \
G_TYPE_KEYFILE_SETTINGS_BACKEND))
typedef GSettingsBackendClass GKeyfileSettingsBackendClass;
typedef enum {
PROP_FILENAME = 1,
PROP_ROOT_PATH,
PROP_ROOT_GROUP,
PROP_DEFAULTS_DIR
} GKeyfileSettingsBackendProperty;
typedef struct
{
GSettingsBackend parent_instance;
GKeyFile *keyfile;
GPermission *permission;
gboolean writable;
char *defaults_dir;
GKeyFile *system_keyfile;
GHashTable *system_locks; /* Used as a set, owning the strings it contains */
gchar *prefix;
gsize prefix_len;
gchar *root_group;
gsize root_group_len;
GFile *file;
GFileMonitor *file_monitor;
guint8 digest[32];
GFile *dir;
GFileMonitor *dir_monitor;
} GKeyfileSettingsBackend;
#ifdef G_OS_WIN32
#define EXTENSION_PRIORITY 10
#else
#define EXTENSION_PRIORITY (glib_should_use_portal () && !glib_has_dconf_access_in_sandbox () ? 110 : 10)
#endif
G_DEFINE_TYPE_WITH_CODE (GKeyfileSettingsBackend,
g_keyfile_settings_backend,
G_TYPE_SETTINGS_BACKEND,
_g_io_modules_ensure_extension_points_registered ();
g_io_extension_point_implement (G_SETTINGS_BACKEND_EXTENSION_POINT_NAME,
g_define_type_id, "keyfile", EXTENSION_PRIORITY))
static void
compute_checksum (guint8 *digest,
gconstpointer contents,
gsize length)
{
GChecksum *checksum;
gsize len = 32;
checksum = g_checksum_new (G_CHECKSUM_SHA256);
g_checksum_update (checksum, contents, length);
g_checksum_get_digest (checksum, digest, &len);
g_checksum_free (checksum);
g_assert (len == 32);
}
static gboolean
g_keyfile_settings_backend_keyfile_write (GKeyfileSettingsBackend *kfsb,
GError **error)
{
gchar *contents;
gsize length;
gboolean success;
contents = g_key_file_to_data (kfsb->keyfile, &length, NULL);
success = g_file_replace_contents (kfsb->file, contents, length, NULL, FALSE,
G_FILE_CREATE_REPLACE_DESTINATION |
G_FILE_CREATE_PRIVATE,
NULL, NULL, error);
compute_checksum (kfsb->digest, contents, length);
g_free (contents);
return success;
}
static gboolean
group_name_matches (const gchar *group_name,
const gchar *prefix)
{
/* sort of like g_str_has_prefix() except that it must be an exact
* match or the prefix followed by '/'.
*
* for example 'a' is a prefix of 'a' and 'a/b' but not 'ab'.
*/
gint i;
for (i = 0; prefix[i]; i++)
if (prefix[i] != group_name[i])
return FALSE;
return group_name[i] == '\0' || group_name[i] == '/';
}
static gboolean
convert_path (GKeyfileSettingsBackend *kfsb,
const gchar *key,
gchar **group,
gchar **basename)
{
gsize key_len = strlen (key);
const gchar *last_slash;
if (key_len < kfsb->prefix_len ||
memcmp (key, kfsb->prefix, kfsb->prefix_len) != 0)
return FALSE;
key_len -= kfsb->prefix_len;
key += kfsb->prefix_len;
last_slash = strrchr (key, '/');
/* Disallow empty group names or key names */
if (key_len == 0 ||
(last_slash != NULL &&
(*(last_slash + 1) == '\0' ||
last_slash == key)))
return FALSE;
if (kfsb->root_group)
{
/* if a root_group was specified, make sure the user hasn't given
* a path that ghosts that group name
*/
if (last_slash != NULL && last_slash - key >= 0 &&
(gsize) (last_slash - key) == kfsb->root_group_len &&
memcmp (key, kfsb->root_group, last_slash - key) == 0)
return FALSE;
}
else
{
/* if no root_group was given, ensure that the user gave a path */
if (last_slash == NULL)
return FALSE;
}
if (group)
{
if (last_slash != NULL)
{
*group = g_memdup2 (key, (last_slash - key) + 1);
(*group)[(last_slash - key)] = '\0';
}
else
*group = g_strdup (kfsb->root_group);
}
if (basename)
{
if (last_slash != NULL)
*basename = g_memdup2 (last_slash + 1, key_len - (last_slash - key));
else
*basename = g_strdup (key);
}
return TRUE;
}
static gboolean
path_is_valid (GKeyfileSettingsBackend *kfsb,
const gchar *path)
{
return convert_path (kfsb, path, NULL, NULL);
}
static GVariant *
get_from_keyfile (GKeyfileSettingsBackend *kfsb,
const GVariantType *type,
const gchar *key)
{
GVariant *return_value = NULL;
gchar *group, *name;
if (convert_path (kfsb, key, &group, &name))
{
gchar *str;
gchar *sysstr;
g_assert (*name);
sysstr = g_key_file_get_value (kfsb->system_keyfile, group, name, NULL);
str = g_key_file_get_value (kfsb->keyfile, group, name, NULL);
if (sysstr &&
(g_hash_table_contains (kfsb->system_locks, key) ||
str == NULL))
{
g_free (str);
str = g_steal_pointer (&sysstr);
}
if (str)
{
return_value = g_variant_parse (type, str, NULL, NULL, NULL);
/* As a special case, support values of type %G_VARIANT_TYPE_STRING
* not being quoted, since users keep forgetting to do it and then
* getting confused. */
if (return_value == NULL &&
g_variant_type_equal (type, G_VARIANT_TYPE_STRING) &&
str[0] != '\"')
{
GString *s = g_string_sized_new (strlen (str) + 2);
char *p = str;
g_string_append_c (s, '\"');
while (*p)
{
if (*p == '\"')
g_string_append_c (s, '\\');
g_string_append_c (s, *p);
p++;
}
g_string_append_c (s, '\"');
return_value = g_variant_parse (type, s->str, NULL, NULL, NULL);
g_string_free (s, TRUE);
}
g_free (str);
}
g_free (sysstr);
g_free (group);
g_free (name);
}
return return_value;
}
static gboolean
set_to_keyfile (GKeyfileSettingsBackend *kfsb,
const gchar *key,
GVariant *value)
{
gchar *group, *name;
if (g_hash_table_contains (kfsb->system_locks, key))
return FALSE;
if (convert_path (kfsb, key, &group, &name))
{
if (value)
{
gchar *str = g_variant_print (value, FALSE);
g_key_file_set_value (kfsb->keyfile, group, name, str);
g_variant_unref (g_variant_ref_sink (value));
g_free (str);
}
else
{
if (*name == '\0')
{
gchar **groups;
gint i;
groups = g_key_file_get_groups (kfsb->keyfile, NULL);
for (i = 0; groups[i]; i++)
if (group_name_matches (groups[i], group))
g_key_file_remove_group (kfsb->keyfile, groups[i], NULL);
g_strfreev (groups);
}
else
g_key_file_remove_key (kfsb->keyfile, group, name, NULL);
}
g_free (group);
g_free (name);
return TRUE;
}
return FALSE;
}
static GVariant *
g_keyfile_settings_backend_read (GSettingsBackend *backend,
const gchar *key,
const GVariantType *expected_type,
gboolean default_value)
{
GKeyfileSettingsBackend *kfsb = G_KEYFILE_SETTINGS_BACKEND (backend);
if (default_value)
return NULL;
return get_from_keyfile (kfsb, expected_type, key);
}
typedef struct
{
GKeyfileSettingsBackend *kfsb;
gboolean failed;
} WriteManyData;
static gboolean
g_keyfile_settings_backend_write_one (gpointer key,
gpointer value,
gpointer user_data)
{
WriteManyData *data = user_data;
gboolean success G_GNUC_UNUSED /* when compiling with G_DISABLE_ASSERT */;
success = set_to_keyfile (data->kfsb, key, value);
g_assert (success);
return FALSE;
}
static gboolean
g_keyfile_settings_backend_check_one (gpointer key,
gpointer value,
gpointer user_data)
{
WriteManyData *data = user_data;
return data->failed = g_hash_table_contains (data->kfsb->system_locks, key) ||
!path_is_valid (data->kfsb, key);
}
static gboolean
g_keyfile_settings_backend_write_tree (GSettingsBackend *backend,
GTree *tree,
gpointer origin_tag)
{
WriteManyData data = { G_KEYFILE_SETTINGS_BACKEND (backend), 0 };
gboolean success;
GError *error = NULL;
if (!data.kfsb->writable)
return FALSE;
g_tree_foreach (tree, g_keyfile_settings_backend_check_one, &data);
if (data.failed)
return FALSE;
g_tree_foreach (tree, g_keyfile_settings_backend_write_one, &data);
success = g_keyfile_settings_backend_keyfile_write (data.kfsb, &error);
if (error)
{
g_warning ("Failed to write keyfile to %s: %s", g_file_peek_path (data.kfsb->file), error->message);
g_error_free (error);
}
g_settings_backend_changed_tree (backend, tree, origin_tag);
return success;
}
static gboolean
g_keyfile_settings_backend_write (GSettingsBackend *backend,
const gchar *key,
GVariant *value,
gpointer origin_tag)
{
GKeyfileSettingsBackend *kfsb = G_KEYFILE_SETTINGS_BACKEND (backend);
gboolean success;
GError *error = NULL;
if (!kfsb->writable)
return FALSE;
success = set_to_keyfile (kfsb, key, value);
if (success)
{
g_settings_backend_changed (backend, key, origin_tag);
success = g_keyfile_settings_backend_keyfile_write (kfsb, &error);
if (error)
{
g_warning ("Failed to write keyfile to %s: %s", g_file_peek_path (kfsb->file), error->message);
g_error_free (error);
}
}
return success;
}
static void
g_keyfile_settings_backend_reset (GSettingsBackend *backend,
const gchar *key,
gpointer origin_tag)
{
GKeyfileSettingsBackend *kfsb = G_KEYFILE_SETTINGS_BACKEND (backend);
GError *error = NULL;
if (set_to_keyfile (kfsb, key, NULL))
{
g_keyfile_settings_backend_keyfile_write (kfsb, &error);
if (error)
{
g_warning ("Failed to write keyfile to %s: %s", g_file_peek_path (kfsb->file), error->message);
g_error_free (error);
}
}
g_settings_backend_changed (backend, key, origin_tag);
}
static gboolean
g_keyfile_settings_backend_get_writable (GSettingsBackend *backend,
const gchar *name)
{
GKeyfileSettingsBackend *kfsb = G_KEYFILE_SETTINGS_BACKEND (backend);
return kfsb->writable &&
!g_hash_table_contains (kfsb->system_locks, name) &&
path_is_valid (kfsb, name);
}
static GPermission *
g_keyfile_settings_backend_get_permission (GSettingsBackend *backend,
const gchar *path)
{
GKeyfileSettingsBackend *kfsb = G_KEYFILE_SETTINGS_BACKEND (backend);
return g_object_ref (kfsb->permission);
}
static void
keyfile_to_tree (GKeyfileSettingsBackend *kfsb,
GTree *tree,
GKeyFile *keyfile,
gboolean dup_check)
{
gchar **groups;
gint i;
groups = g_key_file_get_groups (keyfile, NULL);
for (i = 0; groups[i]; i++)
{
gboolean is_root_group;
gchar **keys;
gint j;
is_root_group = g_strcmp0 (kfsb->root_group, groups[i]) == 0;
/* reject group names that will form invalid key names */
if (!is_root_group &&
(g_str_has_prefix (groups[i], "/") ||
g_str_has_suffix (groups[i], "/") || strstr (groups[i], "//")))
continue;
keys = g_key_file_get_keys (keyfile, groups[i], NULL, NULL);
g_assert (keys != NULL);
for (j = 0; keys[j]; j++)
{
gchar *path, *value;
/* reject key names with slashes in them */
if (strchr (keys[j], '/'))
continue;
if (is_root_group)
path = g_strdup_printf ("%s%s", kfsb->prefix, keys[j]);
else
path = g_strdup_printf ("%s%s/%s", kfsb->prefix, groups[i], keys[j]);
value = g_key_file_get_value (keyfile, groups[i], keys[j], NULL);
if (dup_check && g_strcmp0 (g_tree_lookup (tree, path), value) == 0)
{
g_tree_remove (tree, path);
g_free (value);
g_free (path);
}
else
g_tree_insert (tree, path, value);
}
g_strfreev (keys);
}
g_strfreev (groups);
}
static void
g_keyfile_settings_backend_keyfile_reload (GKeyfileSettingsBackend *kfsb)
{
guint8 digest[32];
gchar *contents;
gsize length;
contents = NULL;
length = 0;
g_file_load_contents (kfsb->file, NULL, &contents, &length, NULL, NULL);
compute_checksum (digest, contents, length);
if (memcmp (kfsb->digest, digest, sizeof digest) != 0)
{
GKeyFile *keyfiles[2];
GTree *tree;
tree = g_tree_new_full ((GCompareDataFunc) strcmp, NULL,
g_free, g_free);
keyfiles[0] = kfsb->keyfile;
keyfiles[1] = g_key_file_new ();
if (length > 0)
g_key_file_load_from_data (keyfiles[1], contents, length,
G_KEY_FILE_KEEP_COMMENTS |
G_KEY_FILE_KEEP_TRANSLATIONS, NULL);
keyfile_to_tree (kfsb, tree, keyfiles[0], FALSE);
keyfile_to_tree (kfsb, tree, keyfiles[1], TRUE);
g_key_file_free (keyfiles[0]);
kfsb->keyfile = keyfiles[1];
if (g_tree_nnodes (tree) > 0)
g_settings_backend_changed_tree (&kfsb->parent_instance, tree, NULL);
g_tree_unref (tree);
memcpy (kfsb->digest, digest, sizeof digest);
}
g_free (contents);
}
static void
g_keyfile_settings_backend_keyfile_writable (GKeyfileSettingsBackend *kfsb)
{
GFileInfo *fileinfo;
gboolean writable;
fileinfo = g_file_query_info (kfsb->dir, "access::*", 0, NULL, NULL);
if (fileinfo)
{
writable =
g_file_info_get_attribute_boolean (fileinfo, G_FILE_ATTRIBUTE_ACCESS_CAN_WRITE) &&
g_file_info_get_attribute_boolean (fileinfo, G_FILE_ATTRIBUTE_ACCESS_CAN_EXECUTE);
g_object_unref (fileinfo);
}
else
writable = FALSE;
if (writable != kfsb->writable)
{
kfsb->writable = writable;
g_settings_backend_path_writable_changed (&kfsb->parent_instance, "/");
}
}
static void
g_keyfile_settings_backend_finalize (GObject *object)
{
GKeyfileSettingsBackend *kfsb = G_KEYFILE_SETTINGS_BACKEND (object);
g_key_file_free (kfsb->keyfile);
g_object_unref (kfsb->permission);
g_key_file_unref (kfsb->system_keyfile);
g_hash_table_unref (kfsb->system_locks);
g_free (kfsb->defaults_dir);
if (kfsb->file_monitor)
{
g_file_monitor_cancel (kfsb->file_monitor);
g_object_unref (kfsb->file_monitor);
}
g_object_unref (kfsb->file);
if (kfsb->dir_monitor)
{
g_file_monitor_cancel (kfsb->dir_monitor);
g_object_unref (kfsb->dir_monitor);
}
g_object_unref (kfsb->dir);
g_free (kfsb->root_group);
g_free (kfsb->prefix);
G_OBJECT_CLASS (g_keyfile_settings_backend_parent_class)->finalize (object);
}
static void
g_keyfile_settings_backend_init (GKeyfileSettingsBackend *kfsb)
{
}
static void
file_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
GKeyfileSettingsBackend *kfsb = user_data;
/* Ignore file deletions, let the GKeyFile content remain in tact. */
if (event_type != G_FILE_MONITOR_EVENT_DELETED)
g_keyfile_settings_backend_keyfile_reload (kfsb);
}
static void
dir_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
gpointer user_data)
{
GKeyfileSettingsBackend *kfsb = user_data;
g_keyfile_settings_backend_keyfile_writable (kfsb);
}
static void
load_system_settings (GKeyfileSettingsBackend *kfsb)
{
GError *error = NULL;
const char *dir = "/etc/glib-2.0/settings";
char *path;
char *contents;
kfsb->system_keyfile = g_key_file_new ();
kfsb->system_locks = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
if (kfsb->defaults_dir)
dir = kfsb->defaults_dir;
path = g_build_filename (dir, "defaults", NULL);
/* The defaults are in the same keyfile format that we use for the settings.
* It can be produced from a dconf database using: dconf dump
*/
if (!g_key_file_load_from_file (kfsb->system_keyfile, path, G_KEY_FILE_NONE, &error))
{
if (!g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
g_warning ("Failed to read %s: %s", path, error->message);
g_clear_error (&error);
}
else
g_debug ("Loading default settings from %s", path);
g_free (path);
path = g_build_filename (dir, "locks", NULL);
/* The locks file is a text file containing a list paths to lock, one per line.
* It can be produced from a dconf database using: dconf list-locks
*/
if (!g_file_get_contents (path, &contents, NULL, &error))
{
if (!g_error_matches (error, G_FILE_ERROR, G_FILE_ERROR_NOENT))
g_warning ("Failed to read %s: %s", path, error->message);
g_clear_error (&error);
}
else
{
char **lines;
gsize i;
g_debug ("Loading locks from %s", path);
lines = g_strsplit (contents, "\n", 0);
for (i = 0; lines[i]; i++)
{
char *line = lines[i];
if (line[0] == '#' || line[0] == '\0')
{
g_free (line);
continue;
}
g_debug ("Locking key %s", line);
g_hash_table_add (kfsb->system_locks, g_steal_pointer (&line));
}
g_free (lines);
}
g_free (contents);
g_free (path);
}
static void
g_keyfile_settings_backend_constructed (GObject *object)
{
GKeyfileSettingsBackend *kfsb = G_KEYFILE_SETTINGS_BACKEND (object);
GError *error = NULL;
const char *path;
if (kfsb->file == NULL)
{
char *filename = g_build_filename (g_get_user_config_dir (),
"glib-2.0", "settings", "keyfile",
NULL);
kfsb->file = g_file_new_for_path (filename);
g_free (filename);
}
if (kfsb->prefix == NULL)
{
kfsb->prefix = g_strdup ("/");
kfsb->prefix_len = 1;
}
kfsb->keyfile = g_key_file_new ();
kfsb->permission = g_simple_permission_new (TRUE);
kfsb->dir = g_file_get_parent (kfsb->file);
path = g_file_peek_path (kfsb->dir);
if (g_mkdir_with_parents (path, 0700) == -1)
g_warning ("Failed to create %s: %s", path, g_strerror (errno));
kfsb->file_monitor = g_file_monitor (kfsb->file, G_FILE_MONITOR_NONE, NULL, &error);
if (!kfsb->file_monitor)
{
g_warning ("Failed to create file monitor for %s: %s", g_file_peek_path (kfsb->file), error->message);
g_clear_error (&error);
}
else
{
g_signal_connect (kfsb->file_monitor, "changed",
G_CALLBACK (file_changed), kfsb);
}
kfsb->dir_monitor = g_file_monitor (kfsb->dir, G_FILE_MONITOR_NONE, NULL, &error);
if (!kfsb->dir_monitor)
{
g_warning ("Failed to create file monitor for %s: %s", g_file_peek_path (kfsb->file), error->message);
g_clear_error (&error);
}
else
{
g_signal_connect (kfsb->dir_monitor, "changed",
G_CALLBACK (dir_changed), kfsb);
}
compute_checksum (kfsb->digest, NULL, 0);
g_keyfile_settings_backend_keyfile_writable (kfsb);
g_keyfile_settings_backend_keyfile_reload (kfsb);
load_system_settings (kfsb);
}
static void
g_keyfile_settings_backend_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GKeyfileSettingsBackend *kfsb = G_KEYFILE_SETTINGS_BACKEND (object);
switch ((GKeyfileSettingsBackendProperty)prop_id)
{
case PROP_FILENAME:
/* Construct only. */
g_assert (kfsb->file == NULL);
if (g_value_get_string (value))
kfsb->file = g_file_new_for_path (g_value_get_string (value));
break;
case PROP_ROOT_PATH:
/* Construct only. */
g_assert (kfsb->prefix == NULL);
kfsb->prefix = g_value_dup_string (value);
if (kfsb->prefix)
kfsb->prefix_len = strlen (kfsb->prefix);
break;
case PROP_ROOT_GROUP:
/* Construct only. */
g_assert (kfsb->root_group == NULL);
kfsb->root_group = g_value_dup_string (value);
if (kfsb->root_group)
kfsb->root_group_len = strlen (kfsb->root_group);
break;
case PROP_DEFAULTS_DIR:
/* Construct only. */
g_assert (kfsb->defaults_dir == NULL);
kfsb->defaults_dir = g_value_dup_string (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_keyfile_settings_backend_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GKeyfileSettingsBackend *kfsb = G_KEYFILE_SETTINGS_BACKEND (object);
switch ((GKeyfileSettingsBackendProperty)prop_id)
{
case PROP_FILENAME:
g_value_set_string (value, g_file_peek_path (kfsb->file));
break;
case PROP_ROOT_PATH:
g_value_set_string (value, kfsb->prefix);
break;
case PROP_ROOT_GROUP:
g_value_set_string (value, kfsb->root_group);
break;
case PROP_DEFAULTS_DIR:
g_value_set_string (value, kfsb->defaults_dir);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_keyfile_settings_backend_class_init (GKeyfileSettingsBackendClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->finalize = g_keyfile_settings_backend_finalize;
object_class->constructed = g_keyfile_settings_backend_constructed;
object_class->get_property = g_keyfile_settings_backend_get_property;
object_class->set_property = g_keyfile_settings_backend_set_property;
class->read = g_keyfile_settings_backend_read;
class->write = g_keyfile_settings_backend_write;
class->write_tree = g_keyfile_settings_backend_write_tree;
class->reset = g_keyfile_settings_backend_reset;
class->get_writable = g_keyfile_settings_backend_get_writable;
class->get_permission = g_keyfile_settings_backend_get_permission;
/* No need to implement subscribed/unsubscribe: the only point would be to
* stop monitoring the file when there's no GSettings anymore, which is no
* big win.
*/
/**
* GKeyfileSettingsBackend:filename:
*
* The location where the settings are stored on disk.
*
* Defaults to `$XDG_CONFIG_HOME/glib-2.0/settings/keyfile`.
*/
g_object_class_install_property (object_class,
PROP_FILENAME,
g_param_spec_string ("filename",
P_("Filename"),
P_("The filename"),
NULL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GKeyfileSettingsBackend:root-path:
*
* All settings read to or written from the backend must fall under the
* path given in @root_path (which must start and end with a slash and
* not contain two consecutive slashes). @root_path may be "/".
*
* Defaults to "/".
*/
g_object_class_install_property (object_class,
PROP_ROOT_PATH,
g_param_spec_string ("root-path",
P_("Root path"),
P_("The root path"),
NULL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GKeyfileSettingsBackend:root-group:
*
* If @root_group is non-%NULL then it specifies the name of the keyfile
* group used for keys that are written directly below the root path.
*
* Defaults to NULL.
*/
g_object_class_install_property (object_class,
PROP_ROOT_GROUP,
g_param_spec_string ("root-group",
P_("Root group"),
P_("The root group"),
NULL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GKeyfileSettingsBackend:default-dir:
*
* The directory where the system defaults and locks are located.
*
* Defaults to `/etc/glib-2.0/settings`.
*/
g_object_class_install_property (object_class,
PROP_DEFAULTS_DIR,
g_param_spec_string ("defaults-dir",
P_("Default dir"),
P_("Defaults dir"),
NULL,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
}
/**
* g_keyfile_settings_backend_new:
* @filename: the filename of the keyfile
* @root_path: the path under which all settings keys appear
* @root_group: (nullable): the group name corresponding to
* @root_path, or %NULL
*
* Creates a keyfile-backed #GSettingsBackend.
*
* The filename of the keyfile to use is given by @filename.
*
* All settings read to or written from the backend must fall under the
* path given in @root_path (which must start and end with a slash and
* not contain two consecutive slashes). @root_path may be "/".
*
* If @root_group is non-%NULL then it specifies the name of the keyfile
* group used for keys that are written directly below @root_path. For
* example, if @root_path is "/apps/example/" and @root_group is
* "toplevel", then settings the key "/apps/example/enabled" to a value
* of %TRUE will cause the following to appear in the keyfile:
*
* |[
* [toplevel]
* enabled=true
* ]|
*
* If @root_group is %NULL then it is not permitted to store keys
* directly below the @root_path.
*
* For keys not stored directly below @root_path (ie: in a sub-path),
* the name of the subpath (with the final slash stripped) is used as
* the name of the keyfile group. To continue the example, if
* "/apps/example/profiles/default/font-size" were set to
* 12 then the following would appear in the keyfile:
*
* |[
* [profiles/default]
* font-size=12
* ]|
*
* The backend will refuse writes (and return writability as being
* %FALSE) for keys outside of @root_path and, in the event that
* @root_group is %NULL, also for keys directly under @root_path.
* Writes will also be refused if the backend detects that it has the
* inability to rewrite the keyfile (ie: the containing directory is not
* writable).
*
* There is no checking done for your key namespace clashing with the
* syntax of the key file format. For example, if you have '[' or ']'
* characters in your path names or '=' in your key names you may be in
* trouble.
*
* The backend reads default values from a keyfile called `defaults` in
* the directory specified by the #GKeyfileSettingsBackend:defaults-dir property,
* and a list of locked keys from a text file with the name `locks` in
* the same location.
*
* Returns: (transfer full): a keyfile-backed #GSettingsBackend
**/
GSettingsBackend *
g_keyfile_settings_backend_new (const gchar *filename,
const gchar *root_path,
const gchar *root_group)
{
g_return_val_if_fail (filename != NULL, NULL);
g_return_val_if_fail (root_path != NULL, NULL);
g_return_val_if_fail (g_str_has_prefix (root_path, "/"), NULL);
g_return_val_if_fail (g_str_has_suffix (root_path, "/"), NULL);
g_return_val_if_fail (strstr (root_path, "//") == NULL, NULL);
return G_SETTINGS_BACKEND (g_object_new (G_TYPE_KEYFILE_SETTINGS_BACKEND,
"filename", filename,
"root-path", root_path,
"root-group", root_group,
NULL));
}
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