slack-timedate/slack-timedate.c

270 lines
7.8 KiB
C

/*
* Copyright (C) 2013 Eugene Wissner <belka.ew@gmail.com>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include <gio/gio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#include <sys/stat.h>
#include "slack-timedate.h"
static void slack_method_call (GDBusConnection *connection, const gchar *sender, const gchar *object_path, const gchar *interface_name, const gchar *method_name, GVariant *parameters, GDBusMethodInvocation *invocation, gpointer user_data) {
gchar *timezone, *response;
gboolean user_interaction, relative, is_localtime, use_ntp;
gint64 usec_utc;
// Set time zone
if (g_strcmp0 (method_name, "SetTimezone") == 0) {
g_variant_get (parameters, "(&sb)", &timezone, &user_interaction);
if (slack_set_timezone (timezone)) g_dbus_method_invocation_return_value (invocation,
NULL);
else g_dbus_method_invocation_return_error (invocation,
G_IO_ERROR,
G_IO_ERROR_FAILED,
"Write operation failed");
g_free (timezone);
} else if (g_strcmp0 (method_name, "SetTime") == 0) {
g_variant_get (parameters, "(xbb)", &usec_utc, &relative, &user_interaction);
// Set time
//if (!slack_set_time (usec_utc, slack_get_is_localtime ())) {
if (slack_set_time (usec_utc)) g_dbus_method_invocation_return_value (invocation,
NULL);
else g_dbus_method_invocation_return_error (invocation,
G_IO_ERROR,
G_IO_ERROR_FAILED,
"Failed to set system clock");
} else if (g_strcmp0 (method_name, "SetNTP") == 0) {
g_variant_get (parameters, "(bb)", &use_ntp, &user_interaction);
// Enable NTP
if (slack_set_ntp (use_ntp)) g_dbus_method_invocation_return_value (invocation,
NULL);
else g_dbus_method_invocation_return_error (invocation,
G_IO_ERROR,
G_IO_ERROR_FAILED,
"Error enabling NTP");
}
return ;
}
static GVariant *slack_get_property (GDBusConnection *connection, const gchar *sender, const gchar *object_path, const gchar *interface_name, const gchar *prop_name, GError **slack_err, gpointer user_data) {
if (g_strcmp0 ("Timezone", prop_name) == 0) {
return g_variant_new_string (slack_get_timezone ());
} if (g_strcmp0 ("LocalRTC", prop_name) == 0) {
return g_variant_new_boolean (slack_get_is_localtime ());
} if (g_strcmp0 ("NTP", prop_name) == 0) {
return g_variant_new_boolean (slack_get_ntp ());
}
return NULL;
}
static void on_timedate_acquired (GDBusConnection *connection, const gchar *name, gpointer user_data) {
guint registration_id;
GDBusNodeInfo *introspection_data;
GError *slack_err;
const GDBusInterfaceVTable interface_vtable = {
slack_method_call,
slack_get_property,
NULL
};
slack_err = NULL;
introspection_data = g_dbus_node_info_new_for_xml (INTROSPECTION_XML, &slack_err);
if (introspection_data == NULL)
g_error ("Failed to parse D-Bus introspection XML: %s\n", slack_err->message);
slack_err = NULL;
registration_id = g_dbus_connection_register_object (connection,
BUS_PATH,
introspection_data->interfaces[0],
&interface_vtable,
NULL,
NULL,
&slack_err);
if (registration_id <= 0) {
g_critical ("Failed to register callbacks for the exported object with the D-Bus interface: %s\n", slack_err->message);
g_error_free (slack_err);
}
g_dbus_node_info_unref (introspection_data);
}
static void on_timedate_lost (GDBusConnection *connection, const gchar *name, gpointer user_data) {
g_warning ("Failed to acquire the service %s.\n", name);
exit (1);
}
gboolean timeout_callback (gpointer loop2quit) {
g_main_loop_quit ((GMainLoop *)loop2quit);
return FALSE;
}
int main (int argc, char **argv) {
guint owner_id;
GMainLoop *loop;
g_type_init ();
owner_id = g_bus_own_name (G_BUS_TYPE_SYSTEM,
BUS_NAME,
G_BUS_NAME_OWNER_FLAGS_ALLOW_REPLACEMENT |
G_BUS_NAME_OWNER_FLAGS_REPLACE,
on_timedate_acquired,
NULL,
on_timedate_lost,
NULL,
NULL);
loop = g_main_loop_new (NULL, FALSE);
g_timeout_add_seconds (DEFAULT_EXIT_SEC, timeout_callback , loop);
g_main_loop_run (loop);
g_bus_unown_name (owner_id);
return EXIT_SUCCESS;
}
gchar *slack_get_timezone () {
gchar *zone_copied_from, *zone;
zone_copied_from = g_file_read_link ("/etc/localtime-copied-from", NULL);
if (zone_copied_from == NULL) return NULL;
zone = g_strdup (zone_copied_from + strlen ("/usr/share/zoneinfo/") * sizeof (gchar));
g_free (zone_copied_from);
return zone;
}
gboolean slack_set_timezone (gchar *zone) {
gchar *zone_file;
GFile *etc_localtime, *localtime_link, *g_zone_file;
zone_file = g_strconcat ("/usr/share/zoneinfo/", zone, NULL);
if (g_file_test (zone_file, G_FILE_TEST_IS_REGULAR)) {
etc_localtime = g_file_new_for_path ("/etc/localtime");
localtime_link = g_file_new_for_path ("/etc/localtime-copied-from");
g_zone_file = g_file_new_for_path (zone_file);
if (!g_file_copy (g_zone_file, etc_localtime, G_FILE_COPY_OVERWRITE, NULL, NULL, NULL, NULL)) {
return FALSE;
}
if (!g_file_delete (localtime_link, NULL, NULL)) {
return FALSE;
}
if (!g_file_make_symbolic_link (localtime_link, zone_file, NULL, NULL)) {
return FALSE;
}
g_free (zone_file);
g_object_unref (etc_localtime);
g_object_unref (localtime_link);
g_object_unref (g_zone_file);
} else {
return FALSE;
}
return TRUE;
}
gboolean slack_set_time (gint64 seconds_since_epoch) {
struct timespec ts;
/* gint exit_status;
gboolean spawn_status;
gchar *cmd;*/
// Set system clock
ts.tv_sec = (time_t) (seconds_since_epoch / USEC_PER_SEC);
ts.tv_nsec = 0;
if (clock_settime (CLOCK_REALTIME, &ts)) {
return FALSE;
}
// Don't save the system time to the hardware clock. The saving takes much
// time. Anyway it is saved automatically on shutdown.
/* Set hardware clock
if (!g_file_test ("/sbin/hwclock", G_FILE_TEST_EXISTS | G_FILE_TEST_IS_REGULAR | G_FILE_TEST_IS_EXECUTABLE)) {
return FALSE;
}
cmd = g_strdup_printf ("/sbin/hwclock %s --systohc", is_localtime ? "--localtime" : "-u");
spawn_status = g_spawn_command_line_sync (cmd, NULL, NULL, &exit_status, NULL);
g_free (cmd);
if ((WEXITSTATUS (exit_status) != 0) || !spawn_status) {
return FALSE;
}*/
return TRUE;
}
gboolean slack_get_is_localtime () {
FILE *fh;
char time_str[10]; // "localtime" is longer than "UTC" and has 9 letters + \0
gboolean is_localtime;
is_localtime = FALSE;
fh = fopen ("/etc/hardwareclock", "r");
if (fh == NULL) return FALSE;
while (fgets (time_str, 10, fh)) {
if (!g_strcmp0 (time_str, "localtime")) {
is_localtime = TRUE;
break;
}
}
fclose (fh);
return is_localtime;
}
gboolean slack_get_ntp () {
if (g_file_test ("/etc/rc.d/rc.ntpd", G_FILE_TEST_IS_EXECUTABLE))
return TRUE;
else return FALSE;
}
gboolean slack_set_ntp (gboolean xntp) {
mode_t rc_mode;
rc_mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
if (xntp) {
rc_mode |= S_IXUSR | S_IXGRP | S_IXOTH;
g_message ("Please don't forget to configure the NTP daemon");
/* It doesn't matter if fails.
* The ntpdate command is considered obsolete, but "orthodox" ntpd -g
* will fail if your system clock is off for more than half an hour. */
g_spawn_command_line_async ("/usr/sbin/ntpdate pool.ntp.org", NULL);
}
if (g_file_test ("/etc/rc.d/rc.ntpd", G_FILE_TEST_IS_REGULAR)) {
if (chmod ("/etc/rc.d/rc.ntpd", rc_mode)) return FALSE;
else return TRUE;
} else {
g_error ("The NTP daemon isn't installed");
return FALSE;
}
}