--- /dev/null
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2011 Lennart Poettering
+
+ systemd 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.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <dbus/dbus.h>
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "util.h"
+#include "strv.h"
+#include "dbus-common.h"
+#include "polkit.h"
+
+#define NULL_ADJTIME_UTC "0.0 0 0\n0\nUTC\n"
+#define NULL_ADJTIME_LOCAL "0.0 0 0\n0\nLOCAL\n"
+
+#define INTROSPECTION \
+ DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE \
+ "<node>\n" \
+ " <interface name=\"org.freedesktop.timedate1\">\n" \
+ " <property name=\"Timezone\" type=\"s\" access=\"read\"/>\n" \
+ " <property name=\"LocalRTC\" type=\"b\" access=\"read\"/>\n" \
+ " <method name=\"SetTime\">\n" \
+ " <arg name=\"usec_utc\" type=\"x\" direction=\"in\"/>\n" \
+ " <arg name=\"relative\" type=\"b\" direction=\"in\"/>\n" \
+ " <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
+ " </method>\n" \
+ " <method name=\"SetTimezone\">\n" \
+ " <arg name=\"timezone\" type=\"s\" direction=\"in\"/>\n" \
+ " <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
+ " </method>\n" \
+ " <method name=\"SetLocalRTC\">\n" \
+ " <arg name=\"local_rtc\" type=\"b\" direction=\"in\"/>\n" \
+ " <arg name=\"user_interaction\" type=\"b\" direction=\"in\"/>\n" \
+ " </method>\n" \
+ " </interface>\n" \
+ BUS_PROPERTIES_INTERFACE \
+ BUS_INTROSPECTABLE_INTERFACE \
+ BUS_PEER_INTERFACE \
+ "</node>\n"
+
+#define INTERFACES_LIST \
+ BUS_GENERIC_INTERFACES_LIST \
+ "org.freedesktop.locale1\0"
+
+static char *zone = NULL;
+static bool local_rtc = false;
+
+static void free_data(void) {
+ free(zone);
+ zone = NULL;
+
+ local_rtc = false;
+}
+
+static bool valid_timezone(const char *name) {
+ const char *p;
+ char *t;
+ bool slash = false;
+ int r;
+ struct stat st;
+
+ assert(name);
+
+ if (*name == '/' || *name == 0)
+ return false;
+
+ for (p = name; *p; p++) {
+ if (!(*p >= '0' && *p <= '9') &&
+ !(*p >= 'a' && *p <= 'z') &&
+ !(*p >= 'A' && *p <= 'Z') &&
+ !(*p == '-' || *p == '_' || *p == '+' || *p == '/'))
+ return false;
+
+ if (*p == '/') {
+
+ if (slash)
+ return false;
+
+ slash = true;
+ } else
+ slash = false;
+ }
+
+ if (slash)
+ return false;
+
+ t = strappend("/usr/share/zoneinfo/", name);
+ if (!t)
+ return false;
+
+ r = stat(t, &st);
+ free(t);
+
+ if (r < 0)
+ return false;
+
+ if (!S_ISREG(st.st_mode))
+ return false;
+
+ return true;
+}
+
+static void verify_timezone(void) {
+ char *p, *a = NULL, *b = NULL;
+ size_t l, q;
+ int j, k;
+
+ if (!zone)
+ return;
+
+ p = strappend("/usr/share/zoneinfo/", zone);
+ if (!p) {
+ log_error("Out of memory");
+ return;
+ }
+
+ j = read_full_file("/etc/localtime", &a, &l);
+ k = read_full_file(p, &b, &q);
+
+ free(p);
+
+ if (j < 0 || k < 0 || l != q || memcmp(a, b, l)) {
+ log_warning("/etc/localtime and /etc/timezone out of sync.");
+ free(zone);
+ zone = NULL;
+ }
+
+ free(a);
+ free(b);
+}
+
+static int read_data(void) {
+ int r;
+ FILE *f;
+
+ free_data();
+
+ r = read_one_line_file("/etc/timezone", &zone);
+ if (r < 0 && r != -ENOENT)
+ return r;
+
+ verify_timezone();
+
+ f = fopen("/etc/adjtime", "r");
+ if (f) {
+ char line[LINE_MAX];
+ bool b;
+
+ b = fgets(line, sizeof(line), f) &&
+ fgets(line, sizeof(line), f) &&
+ fgets(line, sizeof(line), f);
+
+ fclose(f);
+
+ if (!b)
+ return -EIO;
+
+ truncate_nl(line);
+ local_rtc = streq(line, "LOCAL");
+
+ } else if (errno != ENOENT)
+ return -errno;
+
+ return 0;
+}
+
+static int write_data_timezone(void) {
+ int r = 0;
+ char *p;
+
+ if (!zone) {
+ if (unlink("/etc/timezone") < 0 && errno != ENOENT)
+ r = -errno;
+
+ if (unlink("/etc/localtime") < 0 && errno != ENOENT)
+ r = -errno;
+
+ return r;
+ }
+
+ p = strappend("/usr/share/zoneinfo/", zone);
+ if (!p) {
+ log_error("Out of memory");
+ return -ENOMEM;
+ }
+
+ r = symlink_or_copy_atomic(p, "/etc/localtime");
+ free(p);
+
+ if (r < 0)
+ return r;
+
+ r = write_one_line_file_atomic("/etc/timezone", zone);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+static int write_data_local_rtc(void) {
+ int r;
+ char *s, *w;
+
+ r = read_full_file("/etc/adjtime", &s, NULL);
+ if (r < 0) {
+ if (r != -ENOENT)
+ return r;
+
+ if (!local_rtc)
+ return 0;
+
+ w = strdup(NULL_ADJTIME_LOCAL);
+ if (!w)
+ return -ENOMEM;
+ } else {
+ char *p, *e;
+ size_t a, b;
+
+ p = strchr(s, '\n');
+ if (!p) {
+ free(s);
+ return -EIO;
+ }
+
+ p = strchr(p+1, '\n');
+ if (!p) {
+ free(s);
+ return -EIO;
+ }
+
+ p++;
+ e = strchr(p, '\n');
+ if (!p) {
+ free(s);
+ return -EIO;
+ }
+
+ a = p - s;
+ b = strlen(e);
+
+ w = new(char, a + (local_rtc ? 5 : 3) + b + 1);
+ if (!w) {
+ free(s);
+ return -ENOMEM;
+ }
+
+ *(char*) mempcpy(stpcpy(mempcpy(w, s, a), local_rtc ? "LOCAL" : "UTC"), e, b) = 0;
+
+ if (streq(w, NULL_ADJTIME_UTC)) {
+ free(w);
+
+ if (unlink("/etc/adjtime") < 0) {
+ if (errno != ENOENT)
+ return -errno;
+ }
+
+ return 0;
+ }
+ }
+
+ r = write_one_line_file_atomic("/etc/adjtime", w);
+ free(w);
+
+ return r;
+}
+
+static DBusHandlerResult timedate_message_handler(
+ DBusConnection *connection,
+ DBusMessage *message,
+ void *userdata) {
+
+ const BusProperty properties[] = {
+ { "org.freedesktop.timedate1", "Timezone", bus_property_append_string, "s", zone },
+ { "org.freedesktop.timedate1", "LocalRTC", bus_property_append_bool, "b", &local_rtc },
+ { NULL, NULL, NULL, NULL, NULL }
+ };
+
+ DBusMessage *reply = NULL, *changed = NULL;
+ DBusError error;
+ int r;
+
+ assert(connection);
+ assert(message);
+
+ dbus_error_init(&error);
+
+ if (dbus_message_is_method_call(message, "org.freedesktop.timedate1", "SetTimezone")) {
+ const char *z;
+ dbus_bool_t interactive;
+
+ if (!dbus_message_get_args(
+ message,
+ &error,
+ DBUS_TYPE_STRING, &z,
+ DBUS_TYPE_BOOLEAN, &interactive,
+ DBUS_TYPE_INVALID))
+ return bus_send_error_reply(connection, message, &error, -EINVAL);
+
+ if (!valid_timezone(z))
+ return bus_send_error_reply(connection, message, NULL, -EINVAL);
+
+ if (!streq_ptr(z, zone)) {
+ char *t;
+
+ r = verify_polkit(connection, message, "org.freedesktop.timedate1.set-timezone", interactive, &error);
+ if (r < 0)
+ return bus_send_error_reply(connection, message, &error, r);
+
+ t = strdup(z);
+ if (!t)
+ goto oom;
+
+ free(zone);
+ zone = t;
+
+ r = write_data_timezone();
+ if (r < 0) {
+ log_error("Failed to set timezone: %s", strerror(-r));
+ return bus_send_error_reply(connection, message, NULL, r);
+ }
+
+ log_info("Changed timezone to '%s'.", zone);
+
+ changed = bus_properties_changed_new(
+ "/org/freedesktop/timedate1",
+ "org.freedesktop.timedate1",
+ "Timezone\0");
+ if (!changed)
+ goto oom;
+ }
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.timedate1", "SetLocalRTC")) {
+ dbus_bool_t lrtc;
+ dbus_bool_t interactive;
+
+ if (!dbus_message_get_args(
+ message,
+ &error,
+ DBUS_TYPE_BOOLEAN, &lrtc,
+ DBUS_TYPE_BOOLEAN, &interactive,
+ DBUS_TYPE_INVALID))
+ return bus_send_error_reply(connection, message, &error, -EINVAL);
+
+ if (lrtc != local_rtc) {
+ r = verify_polkit(connection, message, "org.freedesktop.timedate1.set-local-rtc", interactive, &error);
+ if (r < 0)
+ return bus_send_error_reply(connection, message, &error, r);
+
+ local_rtc = lrtc;
+
+ r = write_data_local_rtc();
+ if (r < 0) {
+ log_error("Failed to set RTC to local/UTC: %s", strerror(-r));
+ return bus_send_error_reply(connection, message, NULL, r);
+ }
+
+ log_info("Changed local RTC setting to '%s'.", yes_no(local_rtc));
+
+ changed = bus_properties_changed_new(
+ "/org/freedesktop/timedate1",
+ "org.freedesktop.timedate1",
+ "LocalRTC\0");
+ if (!changed)
+ goto oom;
+ }
+
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.timedate1", "SetTime")) {
+ int64_t utc;
+ dbus_bool_t relative;
+ dbus_bool_t interactive;
+
+ if (!dbus_message_get_args(
+ message,
+ &error,
+ DBUS_TYPE_INT64, &utc,
+ DBUS_TYPE_BOOLEAN, &relative,
+ DBUS_TYPE_BOOLEAN, &interactive,
+ DBUS_TYPE_INVALID))
+ return bus_send_error_reply(connection, message, &error, -EINVAL);
+
+ if (!relative && utc <= 0)
+ return bus_send_error_reply(connection, message, NULL, -EINVAL);
+
+ if (!relative || utc != 0) {
+ struct timespec ts;
+
+ r = verify_polkit(connection, message, "org.freedesktop.timedate1.set-time", interactive, &error);
+ if (r < 0)
+ return bus_send_error_reply(connection, message, &error, r);
+
+ if (relative)
+ timespec_store(&ts, now(CLOCK_REALTIME) + utc);
+ else
+ timespec_store(&ts, utc);
+
+ if (clock_settime(CLOCK_REALTIME, &ts) < 0) {
+ log_error("Failed to set local time: %m");
+ return bus_send_error_reply(connection, message, NULL, -errno);
+ }
+
+ log_info("Changed local time to %s", ctime(&ts.tv_sec));
+ }
+
+ } else
+ return bus_default_message_handler(connection, message, INTROSPECTION, INTERFACES_LIST, properties);
+
+ if (!(reply = dbus_message_new_method_return(message)))
+ goto oom;
+
+ if (!dbus_connection_send(connection, reply, NULL))
+ goto oom;
+
+ dbus_message_unref(reply);
+ reply = NULL;
+
+ if (changed) {
+
+ if (!dbus_connection_send(connection, changed, NULL))
+ goto oom;
+
+ dbus_message_unref(changed);
+ }
+
+ return DBUS_HANDLER_RESULT_HANDLED;
+
+oom:
+ if (reply)
+ dbus_message_unref(reply);
+
+ if (changed)
+ dbus_message_unref(changed);
+
+ dbus_error_free(&error);
+
+ return DBUS_HANDLER_RESULT_NEED_MEMORY;
+}
+
+static int connect_bus(DBusConnection **_bus) {
+ static const DBusObjectPathVTable timedate_vtable = {
+ .message_function = timedate_message_handler
+ };
+ DBusError error;
+ DBusConnection *bus = NULL;
+ int r;
+
+ assert(_bus);
+
+ dbus_error_init(&error);
+
+ bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
+ if (!bus) {
+ log_error("Failed to get system D-Bus connection: %s", error.message);
+ r = -ECONNREFUSED;
+ goto fail;
+ }
+
+ if (!dbus_connection_register_object_path(bus, "/org/freedesktop/timedate1", &timedate_vtable, NULL)) {
+ log_error("Not enough memory");
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ if (dbus_bus_request_name(bus, "org.freedesktop.timedate1", DBUS_NAME_FLAG_DO_NOT_QUEUE, &error) < 0) {
+ log_error("Failed to register name on bus: %s", error.message);
+ r = -EEXIST;
+ goto fail;
+ }
+
+ if (_bus)
+ *_bus = bus;
+
+ return 0;
+
+fail:
+ dbus_connection_close(bus);
+ dbus_connection_unref(bus);
+
+ dbus_error_free(&error);
+
+ return r;
+}
+
+int main(int argc, char *argv[]) {
+ int r;
+ DBusConnection *bus = NULL;
+
+ log_set_target(LOG_TARGET_AUTO);
+ log_parse_environment();
+ log_open();
+
+ if (argc != 1) {
+ log_error("This program takes no arguments.");
+ r = -EINVAL;
+ goto finish;
+ }
+
+ umask(0022);
+
+ r = read_data();
+ if (r < 0) {
+ log_error("Failed to read timezone data: %s", strerror(-r));
+ goto finish;
+ }
+
+ r = connect_bus(&bus);
+ if (r < 0)
+ goto finish;
+
+ while (dbus_connection_read_write_dispatch(bus, -1))
+ ;
+
+ r = 0;
+
+finish:
+ free_data();
+
+ if (bus) {
+ dbus_connection_flush(bus);
+ dbus_connection_close(bus);
+ dbus_connection_unref(bus);
+ }
+
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
~ianmdlvl / elogind.git / blobdiff