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/*
* Copyright © 2010 Codethink Limited
*
* 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 of the licence, 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Ryan Lortie <desrt@desrt.ca>
*/
unowned Gvdb.Item get_parent (Gvdb.HashTable table, string name) {
unowned Gvdb.Item parent;
int end = 0;
for (int i = 0; name[i] != '\0'; i++) {
if (name[i - 1] == '/') {
end = i;
}
}
var parent_name = name.substring (0, end);
parent = table.lookup (parent_name);
if (parent == null) {
parent = table.insert (parent_name);
parent.set_parent (get_parent (table, parent_name));
}
return parent;
}
Gvdb.HashTable? read_locks_directory (string dirname) throws GLib.Error {
var dir = Dir.open (dirname);
if (dir == null) {
return null;
}
var table = new Gvdb.HashTable ();
unowned string? name;
while ((name = dir.read_name ()) != null) {
var filename = Path.build_filename (dirname, name);
Posix.Stat buf;
// only 'normal' files
if (Posix.stat (filename, out buf) < 0 || !Posix.S_ISREG (buf.st_mode)) {
continue;
}
string contents;
FileUtils.get_contents (filename, out contents, null);
foreach (var line in contents.split ("\n")) {
if (line.has_prefix ("/")) {
table.insert_string (line, "");
}
}
}
return table;
}
Gvdb.HashTable read_directory (string dirname) throws GLib.Error {
var table = new Gvdb.HashTable ();
unowned string? name;
table.insert ("/");
var dir = Dir.open (dirname);
while ((name = dir.read_name ()) != null) {
var filename = Path.build_filename (dirname, name);
Posix.Stat buf;
// only 'normal' files
if (Posix.stat (filename, out buf) < 0 || !Posix.S_ISREG (buf.st_mode)) {
continue;
}
var kf = new KeyFile ();
try {
kf.load_from_file (filename, KeyFileFlags.NONE);
} catch (GLib.Error e) {
stderr.printf ("%s: %s\n", filename, e.message);
continue;
}
foreach (var group in kf.get_groups ()) {
if (group.has_prefix ("/") || group.has_suffix ("/") || "//" in group) {
stderr.printf ("%s: ignoring invalid group name: %s\n", filename, group);
continue;
}
foreach (var key in kf.get_keys (group)) {
if ("/" in key) {
stderr.printf ("%s: [%s]: ignoring invalid key name: %s\n", filename, group, key);
continue;
}
var path = "/" + group + "/" + key;
if (table.lookup (path) != null) {
stderr.printf ("%s: [%s]: %s: ignoring duplicate definition of key %s\n",
filename, group, key, path);
continue;
}
var text = kf.get_value (group, key);
try {
var value = Variant.parse (null, text);
unowned Gvdb.Item item = table.insert (path);
item.set_parent (get_parent (table, path));
item.set_value (value);
} catch (VariantParseError e) {
stderr.printf ("%s: [%s]: %s: skipping invalid value: %s (%s)\n",
filename, group, key, text, e.message);
}
}
}
}
var locks = read_locks_directory (dirname + "/locks");
if (locks != null) {
unowned Gvdb.Item item = table.insert (".locks");
item.set_hash_table (locks);
}
return table;
}
void maybe_update_from_directory (string dirname) throws GLib.Error {
Posix.Stat dir_buf;
if (Posix.stat (dirname, out dir_buf) == 0 && Posix.S_ISDIR (dir_buf.st_mode)) {
Posix.Stat lockdir_buf;
Posix.Stat file_buf;
var filename = dirname.substring (0, dirname.length - 2);
if (Posix.stat (dirname + "/locks", out lockdir_buf) == 0 && lockdir_buf.st_mtime > dir_buf.st_mtime) {
// if the lock directory has been updated more recently then consider its timestamp instead
dir_buf.st_mtime = lockdir_buf.st_mtime;
}
if (Posix.stat (filename, out file_buf) == 0 && file_buf.st_mtime > dir_buf.st_mtime) {
return;
}
var table = read_directory (dirname);
var fd = Posix.open (filename, Posix.O_WRONLY);
if (fd < 0 && errno != Posix.ENOENT) {
var saved_error = errno;
throw new FileError.FAILED ("Can not open '%s' for replacement: %s", filename, strerror (saved_error));
}
try {
table.write_contents (filename);
if (fd >= 0) {
Posix.write (fd, "\0\0\0\0\0\0\0\0", 8);
}
} finally {
if (fd >= 0) {
Posix.close (fd);
}
}
try {
var system_bus = Bus.get_sync (BusType.SYSTEM);
system_bus.emit_signal (null, "/ca/desrt/dconf/Writer/" + Path.get_basename (filename), "ca.desrt.dconf.Writer",
"WritabilityNotify", new Variant ("(s)", "/"));
flush_the_bus (system_bus);
} catch {
/* if we can't, ... don't. */
}
}
}
void update_all (string dirname) throws GLib.Error {
unowned string? name;
var dir = Dir.open (dirname);
while ((name = dir.read_name ()) != null) {
if (name.has_suffix (".d")) {
try {
maybe_update_from_directory (Path.build_filename (dirname, name));
} catch (GLib.Error e) {
stderr.printf ("%s\n", e.message);
}
}
}
}
void dconf_update (string[] args) {
try {
update_all ("/etc/dconf/db");
} catch (GLib.Error e) {
stderr.printf ("fatal: %s\n", e.message);
}
}
// vim:noet ts=4 sw=4
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