timedatectl: introduce new command line client for timedated

Much like logind has a client in loginctl, and journald in journalctl
introduce timedatectl, to change the system time (incl. RTC), timezones
and related settings.

13 files changed, 959 insertions, 32 deletions

diff --git a/.gitignore b/.gitignore
index b9b333d9d..bc72be821 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+/timedatectl
 /test-date
 /install-tree
 /systemd-journal-gatewayd
diff --git a/Makefile.am b/Makefile.am
index 0a3ed18a4..06dd1b1a8 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -3194,6 +3194,24 @@ MANPAGES_ALIAS += \
 	man/systemd-timedated.8
 
 man/systemd-timedated.8: man/systemd-timedated.service.8
+
+timedatectl_SOURCES = \
+	src/timedate/timedatectl.c
+
+timedatectl_CFLAGS = \
+	$(AM_CFLAGS) \
+	$(DBUS_CFLAGS)
+
+timedatectl_LDADD = \
+	libsystemd-shared.la \
+	libsystemd-dbus.la
+
+bin_PROGRAMS += \
+	timedatectl
+
+MANPAGES += \
+	man/timedatectl.1
+
 endif
 
 polkitpolicy_in_files += \
diff --git a/TODO b/TODO
index 218aad248..a5a8057d6 100644
--- a/TODO
+++ b/TODO
@@ -19,6 +19,10 @@ F18:
 
 Features:
 
+* timedated: export boolean that clarifies whether NTP is even available
+
+* timedated: refuse time changes when NTP is on
+
 * journald: don't make SystemMinFileSize= configurable
 
 * clean up date formatting and parsing so that all absolute/relative timestamps we format can also be parsed
diff --git a/man/systemd-timedated.service.xml b/man/systemd-timedated.service.xml
index 47e762284..ea2abc576 100644
--- a/man/systemd-timedated.service.xml
+++ b/man/systemd-timedated.service.xml
@@ -64,6 +64,10 @@
                 is automatically activated on request and terminates
                 itself when it is unused.</para>
 
+                <para>The tool
+                <citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+                is a command line client to this service.</para>
+
                 <para>See the <ulink
                 url="http://www.freedesktop.org/wiki/Software/systemd/timedated">
                 developer documentation</ulink> for information about
@@ -75,6 +79,7 @@
                 <title>See Also</title>
                 <para>
                         <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>timedatectl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                         <citerefentry><refentrytitle>localtime</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                         <citerefentry><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>
                 </para>
diff --git a/man/timedatectl.xml b/man/timedatectl.xml
new file mode 100644
index 000000000..8fb4e38f3
--- /dev/null
+++ b/man/timedatectl.xml
@@ -0,0 +1,243 @@
+<?xml version='1.0'?> <!--*-nxml-*-->
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
+
+<!--
+  This file is part of systemd.
+
+  Copyright 2012 Lennart Poettering
+
+  systemd 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.
+
+  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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<refentry id="timedatectl">
+
+        <refentryinfo>
+                <title>timedatectl</title>
+                <productname>systemd</productname>
+
+                <authorgroup>
+                        <author>
+                                <contrib>Developer</contrib>
+                                <firstname>Lennart</firstname>
+                                <surname>Poettering</surname>
+                                <email>lennart@poettering.net</email>
+                        </author>
+                </authorgroup>
+        </refentryinfo>
+
+        <refmeta>
+                <refentrytitle>timedatectl</refentrytitle>
+                <manvolnum>1</manvolnum>
+        </refmeta>
+
+        <refnamediv>
+                <refname>timedatectl</refname>
+                <refpurpose>Control the system time and date</refpurpose>
+        </refnamediv>
+
+        <refsynopsisdiv>
+                <cmdsynopsis>
+                        <command>timedatectl <arg choice="opt" rep="repeat">OPTIONS</arg> <arg choice="req">COMMAND</arg></command>
+                </cmdsynopsis>
+        </refsynopsisdiv>
+
+        <refsect1>
+                <title>Description</title>
+
+                <para><command>timedatectl</command> may be used to
+                query and change the system clock and its
+                settings.</para>
+        </refsect1>
+
+        <refsect1>
+                <title>Options</title>
+
+                <para>The following options are understood:</para>
+
+                <variablelist>
+                        <varlistentry>
+                                <term><option>--help</option></term>
+                                <term><option>-h</option></term>
+
+                                <listitem><para>Prints a short help
+                                text and exits.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><option>--version</option></term>
+
+                                <listitem><para>Prints a short version
+                                string and exits.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><option>--no-pager</option></term>
+
+                                <listitem><para>Do not pipe output into a
+                                pager.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><option>--no-ask-password</option></term>
+
+                                <listitem><para>Don't query the user
+                                for authentication for privileged
+                                operations.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><option>-H</option></term>
+                                <term><option>--host</option></term>
+
+                                <listitem><para>Execute operation
+                                remotely. Specify a hostname, or
+                                username and hostname separated by @,
+                                to connect to. This will use SSH to
+                                talk to a remote
+                                system.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><option>--fix-system</option></term>
+
+                                <listitem><para>If
+                                <command>set-local-rtc</command> is
+                                invoked and this option is passed the
+                                system clock is synchronized from the
+                                RTC again, taking the new setting into
+                                account. Otherwise the RTC is
+                                synchonized from the system
+                                clock.</para></listitem>
+                        </varlistentry>
+                </variablelist>
+
+                <para>The following commands are understood:</para>
+
+                <variablelist>
+                        <varlistentry>
+                                <term><command>status</command></term>
+
+                                <listitem><para>Show current settings
+                                of the system clock and
+                                RTC.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><command>set-time [TIME]</command></term>
+
+                                <listitem><para>Set the system clock
+                                to the specified time. This will also
+                                update the RTC time accordingly. The time
+                                may be specified in the format
+                                "2012-10-30
+                                18:17:16".</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><command>set-timezone [TIMEZONE]</command></term>
+
+                                <listitem><para>Set the system time
+                                zone to the specified value. Available
+                                time zones my be listed with
+                                <command>list-timezones</command>. If
+                                the RTC is configured to be in the
+                                local time this will also update the
+                                RTC time.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><command>list-timezones</command></term>
+
+                                <listitem><para>List available time
+                                zones, one per line. Entries from the
+                                list may selected as the system
+                                timezone with
+                                <command>set-timezone</command>.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><command>set-local-rtc [BOOL]</command></term>
+
+                                <listitem><para>Takes a boolean
+                                argument. If <literal>0</literal> the
+                                system is configured to maintain the
+                                RTC in universal time, if
+                                <literal>1</literal> it will maintain
+                                the RTC in local time instead. Note
+                                that maintaining the RTC in the local
+                                timezone is is not fully supported and
+                                will create various problems with time
+                                zone changes and daylight saving
+                                adjustments. If at all possible use
+                                RTC in UTC. Note that invoking this
+                                will also synchronize the RTC from the
+                                system clock, unless
+                                <option>--fix-system</option> is
+                                passed (see above). This command will
+                                change the 3rd line of
+                                <filename>/etc/adjtime</filename>, as
+                                documented in
+                                <citerefentry><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><command>set-ntp [BOOL]</command></term>
+
+                                <listitem><para>Takes a boolean
+                                argument. Controls whether NTP based
+                                network time synchronization is
+                                enabled (if
+                                available).</para></listitem>
+                        </varlistentry>
+
+                </variablelist>
+
+        </refsect1>
+
+        <refsect1>
+                <title>Exit status</title>
+
+                <para>On success 0 is returned, a non-zero failure
+                code otherwise.</para>
+        </refsect1>
+
+        <refsect1>
+                <title>Environment</title>
+
+                <variablelist>
+                        <varlistentry>
+                                <term><varname>$SYSTEMD_PAGER</varname></term>
+                                <listitem><para>Pager to use when
+                                <option>--no-pager</option> is not given;
+                                overrides <varname>$PAGER</varname>.  Setting
+                                this to an empty string or the value
+                                <literal>cat</literal> is equivalent to passing
+                                <option>--no-pager</option>.</para></listitem>
+                        </varlistentry>
+                </variablelist>
+        </refsect1>
+
+        <refsect1>
+                <title>See Also</title>
+                <para>
+                        <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>hwclock</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>date</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+                        <citerefentry><refentrytitle>systemd-timedated.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+                </para>
+        </refsect1>
+
+</refentry>
diff --git a/rules/50-udev-default.rules b/rules/50-udev-default.rules
index 6e3ab94d5..20ef5fda5 100644
--- a/rules/50-udev-default.rules
+++ b/rules/50-udev-default.rules
@@ -83,6 +83,6 @@ KERNEL=="rfkill", MODE="0644"
 
 KERNEL=="fuse", ACTION=="add", MODE="0666", OPTIONS+="static_node=fuse"
 
-SUBSYSTEM=="rtc", ATTR{hctosys}=="1", SYMLINK+="rtc"
+SUBSYSTEM=="rtc", ATTR{hctosys}=="1", MODE="0644", SYMLINK+="rtc"
 
 SUBSYSTEM=="firmware", ACTION=="add", IMPORT{builtin}="firmware"
diff --git a/src/login/loginctl.c b/src/login/loginctl.c
index 7ef9ddeb1..0d9358d27 100644
--- a/src/login/loginctl.c
+++ b/src/login/loginctl.c
@@ -862,7 +862,7 @@ static int print_property(const char *name, DBusMessageIter *iter) {
 }
 
 static int show_one(const char *verb, DBusConnection *bus, const char *path, bool show_properties, bool *new_line) {
-        DBusMessage *reply = NULL;
+        _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
         const char *interface = "";
         int r;
         DBusMessageIter iter, sub, sub2, sub3;
@@ -877,7 +877,7 @@ static int show_one(const char *verb, DBusConnection *bus, const char *path, boo
         zero(user_info);
         zero(seat_info);
 
-        r = bus_method_call_with_reply (
+        r = bus_method_call_with_reply(
                         bus,
                         "org.freedesktop.login1",
                         path,
@@ -887,7 +887,7 @@ static int show_one(const char *verb, DBusConnection *bus, const char *path, boo
                         NULL,
                         DBUS_TYPE_STRING, &interface,
                         DBUS_TYPE_INVALID);
-        if (r)
+        if (r < 0)
                 goto finish;
 
         if (!dbus_message_iter_init(reply, &iter) ||
@@ -941,7 +941,6 @@ static int show_one(const char *verb, DBusConnection *bus, const char *path, boo
 
                 if (r < 0) {
                         log_error("Failed to parse reply.");
-                        r = -EIO;
                         goto finish;
                 }
 
@@ -957,14 +956,11 @@ static int show_one(const char *verb, DBusConnection *bus, const char *path, boo
                         print_seat_status_info(&seat_info);
         }
 
-        strv_free(seat_info.sessions);
-        strv_free(user_info.sessions);
-
         r = 0;
 
 finish:
-        if (reply)
-                dbus_message_unref(reply);
+        strv_free(seat_info.sessions);
+        strv_free(user_info.sessions);
 
         return r;
 }
@@ -1339,16 +1335,16 @@ static int help(void) {
 
         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
                "Send control commands to or query the login manager.\n\n"
-               "  -h --help           Show this help\n"
-               "     --version        Show package version\n"
-               "  -p --property=NAME  Show only properties by this name\n"
-               "  -a --all            Show all properties, including empty ones\n"
-               "     --kill-who=WHO   Who to send signal to\n"
-               "  -s --signal=SIGNAL  Which signal to send\n"
-               "  -H --host=[USER@]HOST\n"
-               "                      Show information for remote host\n"
-               "  -P --privileged     Acquire privileges before execution\n"
-               "     --no-pager       Do not pipe output into a pager\n\n"
+               "  -h --help              Show this help\n"
+               "     --version           Show package version\n"
+               "  -p --property=NAME     Show only properties by this name\n"
+               "  -a --all               Show all properties, including empty ones\n"
+               "     --kill-who=WHO      Who to send signal to\n"
+               "  -s --signal=SIGNAL     Which signal to send\n"
+               "     --no-ask-password   Don't prompt for password\n"
+               "  -H --host=[USER@]HOST  Show information for remote host\n"
+               "  -P --privileged        Acquire privileges before execution\n"
+               "     --no-pager          Do not pipe output into a pager\n\n"
                "Commands:\n"
                "  list-sessions                   List sessions\n"
                "  session-status [ID...]          Show session status\n"
@@ -1387,17 +1383,17 @@ static int parse_argv(int argc, char *argv[]) {
         };
 
         static const struct option options[] = {
-                { "help",      no_argument,       NULL, 'h'           },
-                { "version",   no_argument,       NULL, ARG_VERSION   },
-                { "property",  required_argument, NULL, 'p'           },
-                { "all",       no_argument,       NULL, 'a'           },
-                { "no-pager",  no_argument,       NULL, ARG_NO_PAGER  },
-                { "kill-who",  required_argument, NULL, ARG_KILL_WHO  },
-                { "signal",    required_argument, NULL, 's'           },
-                { "host",      required_argument, NULL, 'H'           },
-                { "privileged",no_argument,       NULL, 'P'           },
-                { "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
-                { NULL,        0,                 NULL, 0             }
+                { "help",            no_argument,       NULL, 'h'                 },
+                { "version",         no_argument,       NULL, ARG_VERSION         },
+                { "property",        required_argument, NULL, 'p'                 },
+                { "all",             no_argument,       NULL, 'a'                 },
+                { "no-pager",        no_argument,       NULL, ARG_NO_PAGER        },
+                { "kill-who",        required_argument, NULL, ARG_KILL_WHO        },
+                { "signal",          required_argument, NULL, 's'                 },
+                { "host",            required_argument, NULL, 'H'                 },
+                { "privileged",      no_argument,       NULL, 'P'                 },
+                { "no-ask-password", no_argument,       NULL, ARG_NO_ASK_PASSWORD },
+                { NULL,              0,                 NULL, 0                   }
         };
 
         int c;
diff --git a/src/shared/dbus-common.h b/src/shared/dbus-common.h
index 394ab4cb6..005a715d0 100644
--- a/src/shared/dbus-common.h
+++ b/src/shared/dbus-common.h
@@ -22,6 +22,7 @@
 ***/
 
 #include <dbus/dbus.h>
+#include <inttypes.h>
 
 #ifndef DBUS_ERROR_UNKNOWN_OBJECT
 #define DBUS_ERROR_UNKNOWN_OBJECT "org.freedesktop.DBus.Error.UnknownObject"
diff --git a/src/shared/macro.h b/src/shared/macro.h
index dbdf5b3fb..e930fdab5 100644
--- a/src/shared/macro.h
+++ b/src/shared/macro.h
@@ -192,6 +192,7 @@ static inline size_t IOVEC_INCREMENT(struct iovec *i, unsigned n, size_t k) {
 #define _cleanup_close_ __attribute__((cleanup(closep)))
 #define _cleanup_closedir_ __attribute__((cleanup(closedirp)))
 #define _cleanup_umask_ __attribute__((cleanup(umaskp)))
+#define _cleanup_strv_free_ __attribute__((cleanup(strv_freep)))
 
 #define VA_FORMAT_ADVANCE(format, ap)                                   \
 do {                                                                    \
diff --git a/src/shared/strv.c b/src/shared/strv.c
index c8d856344..822b2dc88 100644
--- a/src/shared/strv.c
+++ b/src/shared/strv.c
@@ -64,6 +64,14 @@ void strv_free(char **l) {
         free(l);
 }
 
+void strv_freep(char ***l) {
+        if (!l)
+                return;
+
+        strv_free(*l);
+        *l = NULL;
+}
+
 char **strv_copy(char **l) {
         char **r, **k;
 
diff --git a/src/shared/strv.h b/src/shared/strv.h
index ae4e31f14..81e33356f 100644
--- a/src/shared/strv.h
+++ b/src/shared/strv.h
@@ -30,6 +30,7 @@ char *strv_find(char **l, const char *name);
 char *strv_find_prefix(char **l, const char *name);
 
 void strv_free(char **l);
+void strv_freep(char ***l);
 char **strv_copy(char **l) _malloc_;
 unsigned strv_length(char **l);
 
diff --git a/src/shared/util.c b/src/shared/util.c
index 1e1eb2af5..50c4c0899 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -1959,7 +1959,7 @@ char *format_timestamp(char *buf, size_t l, usec_t t) {
 
         sec = (time_t) (t / USEC_PER_SEC);
 
-        if (strftime(buf, l, "%a, %d %b %Y %H:%M:%S %z", localtime_r(&sec, &tm)) <= 0)
+        if (strftime(buf, l, "%a, %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) <= 0)
                 return NULL;
 
         return buf;
diff --git a/src/timedate/timedatectl.c b/src/timedate/timedatectl.c
new file mode 100644
index 000000000..8c6e7c921
--- /dev/null
+++ b/src/timedate/timedatectl.c
@@ -0,0 +1,649 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2012 Lennart Poettering
+
+  systemd 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.
+
+  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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdlib.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <string.h>
+#include <sys/timex.h>
+
+#include "dbus-common.h"
+#include "util.h"
+#include "spawn-polkit-agent.h"
+#include "build.h"
+#include "hwclock.h"
+#include "strv.h"
+#include "pager.h"
+
+static bool arg_fix_system = false;
+static bool arg_no_pager = false;
+static enum transport {
+        TRANSPORT_NORMAL,
+        TRANSPORT_SSH,
+        TRANSPORT_POLKIT
+} arg_transport = TRANSPORT_NORMAL;
+static bool arg_ask_password = true;
+static const char *arg_host = NULL;
+
+static void pager_open_if_enabled(void) {
+
+        if (arg_no_pager)
+                return;
+
+        pager_open();
+}
+
+static void polkit_agent_open_if_enabled(void) {
+
+        /* Open the polkit agent as a child process if necessary */
+
+        if (!arg_ask_password)
+                return;
+
+        polkit_agent_open();
+}
+
+typedef struct StatusInfo {
+        const char *timezone;
+        bool local_rtc;
+        bool ntp;
+} StatusInfo;
+
+static bool ntp_synced(void) {
+
+        struct timex txc;
+
+        zero(txc);
+
+        if (adjtimex(&txc) < 0)
+                return false;
+
+        if (txc.status & STA_UNSYNC)
+                return false;
+
+        return true;
+}
+
+static void print_status_info(StatusInfo *i) {
+        usec_t n;
+        char b[FORMAT_TIMESTAMP_MAX];
+        struct tm tm;
+        time_t sec;
+        int r;
+
+        n = now(CLOCK_REALTIME);
+        sec = (time_t) (n / USEC_PER_SEC);
+
+        zero(tm);
+        assert_se(strftime(b, sizeof(b), "%a, %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) > 0);
+        char_array_0(b);
+        printf("      Local time: %s\n", b);
+
+        zero(tm);
+        assert_se(strftime(b, sizeof(b), "%a, %Y-%m-%d %H:%M:%S UTC", gmtime_r(&sec, &tm)) > 0);
+        char_array_0(b);
+        printf("  Universal time: %s\n", b);
+
+        zero(tm);
+        r = hwclock_get_time(&tm);
+        if (r >= 0) {
+                /* Calculcate the week-day */
+                mktime(&tm);
+
+                assert_se(strftime(b, sizeof(b), "%a, %Y-%m-%d %H:%M:%S", &tm) > 0);
+                char_array_0(b);
+                printf("        RTC time: %s\n", b);
+        }
+
+        printf("        Timezone: %s\n"
+               "     NTP enabled: %s\n"
+               "NTP synchronized: %s\n"
+               " RTC in local TZ: %s\n",
+               strna(i->timezone),
+               yes_no(i->ntp),
+               yes_no(ntp_synced()),
+               yes_no(i->local_rtc));
+
+        if (i->local_rtc)
+                fputs("\n" ANSI_HIGHLIGHT_ON
+                      "Warning: The RTC is configured to maintain time in the local time zone. This\n"
+                      "         mode is not fully supported and will create various problems with time\n"
+                      "         zone changes and daylight saving adjustments. If at all possible use\n"
+                      "         RTC in UTC, by calling 'timedatectl set-local-rtc 0'" ANSI_HIGHLIGHT_OFF ".\n", stdout);
+}
+
+static int status_property(const char *name, DBusMessageIter *iter, StatusInfo *i) {
+        assert(name);
+        assert(iter);
+
+        switch (dbus_message_iter_get_arg_type(iter)) {
+
+        case DBUS_TYPE_STRING: {
+                const char *s;
+
+                dbus_message_iter_get_basic(iter, &s);
+                if (!isempty(s)) {
+                        if (streq(name, "Timezone"))
+                                i->timezone = s;
+                }
+                break;
+        }
+
+        case DBUS_TYPE_BOOLEAN: {
+                dbus_bool_t b;
+
+                dbus_message_iter_get_basic(iter, &b);
+                if (streq(name, "LocalRTC"))
+                        i->local_rtc = b;
+                else if (streq(name, "NTP"))
+                        i->ntp = b;
+        }
+        }
+
+        return 0;
+}
+
+static int show_status(DBusConnection *bus, char **args, unsigned n) {
+        _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
+        const char *interface = "";
+        int r;
+        DBusMessageIter iter, sub, sub2, sub3;
+        StatusInfo info;
+
+        assert(args);
+
+        r = bus_method_call_with_reply(
+                        bus,
+                        "org.freedesktop.timedate1",
+                        "/org/freedesktop/timedate1",
+                        "org.freedesktop.DBus.Properties",
+                        "GetAll",
+                        &reply,
+                        NULL,
+                        DBUS_TYPE_STRING, &interface,
+                        DBUS_TYPE_INVALID);
+        if (r < 0)
+                return r;
+
+        if (!dbus_message_iter_init(reply, &iter) ||
+            dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY ||
+            dbus_message_iter_get_element_type(&iter) != DBUS_TYPE_DICT_ENTRY)  {
+                log_error("Failed to parse reply.");
+                return -EIO;
+        }
+
+        dbus_message_iter_recurse(&iter, &sub);
+
+        while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
+                const char *name;
+
+                if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_DICT_ENTRY) {
+                        log_error("Failed to parse reply.");
+                        return -EIO;
+                }
+
+                dbus_message_iter_recurse(&sub, &sub2);
+
+                if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &name, true) < 0) {
+                        log_error("Failed to parse reply.");
+                        return -EIO;
+                }
+
+                if (dbus_message_iter_get_arg_type(&sub2) != DBUS_TYPE_VARIANT)  {
+                        log_error("Failed to parse reply.");
+                        return -EIO;
+                }
+
+                dbus_message_iter_recurse(&sub2, &sub3);
+
+                r = status_property(name, &sub3, &info);
+                if (r < 0) {
+                        log_error("Failed to parse reply.");
+                        return r;
+                }
+
+                dbus_message_iter_next(&sub);
+        }
+
+        print_status_info(&info);
+        return 0;
+}
+
+static int set_time(DBusConnection *bus, char **args, unsigned n) {
+        _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
+        dbus_bool_t relative = false, interactive = true;
+        usec_t t;
+        dbus_int64_t u;
+        int r;
+
+        assert(args);
+        assert(n == 2);
+
+        polkit_agent_open_if_enabled();
+
+        r = parse_timestamp(args[1], &t);
+        if (r < 0) {
+                log_error("Failed to parse time specification: %s", args[1]);
+                return r;
+        }
+
+        u = (dbus_uint64_t) t;
+
+        return bus_method_call_with_reply(
+                        bus,
+                        "org.freedesktop.timedate1",
+                        "/org/freedesktop/timedate1",
+                        "org.freedesktop.timedate1",
+                        "SetTime",
+                        &reply,
+                        NULL,
+                        DBUS_TYPE_INT64, &u,
+                        DBUS_TYPE_BOOLEAN, &relative,
+                        DBUS_TYPE_BOOLEAN, &interactive,
+                        DBUS_TYPE_INVALID);
+}
+
+static int set_timezone(DBusConnection *bus, char **args, unsigned n) {
+        _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
+        dbus_bool_t interactive = true;
+
+        assert(args);
+        assert(n == 2);
+
+        polkit_agent_open_if_enabled();
+
+        return bus_method_call_with_reply(
+                        bus,
+                        "org.freedesktop.timedate1",
+                        "/org/freedesktop/timedate1",
+                        "org.freedesktop.timedate1",
+                        "SetTimezone",
+                        &reply,
+                        NULL,
+                        DBUS_TYPE_STRING, &args[1],
+                        DBUS_TYPE_BOOLEAN, &interactive,
+                        DBUS_TYPE_INVALID);
+}
+
+static int set_local_rtc(DBusConnection *bus, char **args, unsigned n) {
+        _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
+        dbus_bool_t interactive = true, b, q;
+        int r;
+
+        assert(args);
+        assert(n == 2);
+
+        polkit_agent_open_if_enabled();
+
+        r = parse_boolean(args[1]);
+        if (r < 0) {
+                log_error("Failed to parse local RTC setting: %s", args[1]);
+                return r;
+        }
+
+        b = r;
+        q = arg_fix_system;
+
+        return bus_method_call_with_reply(
+                        bus,
+                        "org.freedesktop.timedate1",
+                        "/org/freedesktop/timedate1",
+                        "org.freedesktop.timedate1",
+                        "SetLocalRTC",
+                        &reply,
+                        NULL,
+                        DBUS_TYPE_BOOLEAN, &b,
+                        DBUS_TYPE_BOOLEAN, &q,
+                        DBUS_TYPE_BOOLEAN, &interactive,
+                        DBUS_TYPE_INVALID);
+}
+
+static int set_ntp(DBusConnection *bus, char **args, unsigned n) {
+        _cleanup_dbus_message_unref_ DBusMessage *reply = NULL;
+        dbus_bool_t interactive = true, b;
+        int r;
+
+        assert(args);
+        assert(n == 2);
+
+        polkit_agent_open_if_enabled();
+
+        r = parse_boolean(args[1]);
+        if (r < 0) {
+                log_error("Failed to parse NTP setting: %s", args[1]);
+                return r;
+        }
+
+        b = r;
+
+        return bus_method_call_with_reply(
+                        bus,
+                        "org.freedesktop.timedate1",
+                        "/org/freedesktop/timedate1",
+                        "org.freedesktop.timedate1",
+                        "SetNTP",
+                        &reply,
+                        NULL,
+                        DBUS_TYPE_BOOLEAN, &b,
+                        DBUS_TYPE_BOOLEAN, &interactive,
+                        DBUS_TYPE_INVALID);
+}
+
+static int zone_compare(const void *_a, const void *_b) {
+        const char **a = (const char**) _a, **b = (const char**) _b;
+
+        return strcmp(*a, *b);
+}
+
+static int list_timezones(DBusConnection *bus, char **args, unsigned n) {
+        _cleanup_fclose_ FILE *f = NULL;
+        _cleanup_strv_free_ char **zones = NULL;
+        size_t n_zones;
+        char **i;
+
+        assert(args);
+        assert(n == 1);
+
+        f = fopen("/usr/share/zoneinfo/zone.tab", "re");
+        if (!f) {
+                log_error("Failed to open timezone database: %m");
+                return -errno;
+        }
+
+        for (;;) {
+                char l[LINE_MAX], *p, **z, *w;
+                size_t k;
+
+                if (!fgets(l, sizeof(l), f)) {
+                        if (feof(f))
+                                break;
+
+                        log_error("Failed to read timezone database: %m");
+                        return -errno;
+                }
+
+                p = strstrip(l);
+
+                if (isempty(p) || *p == '#')
+                        continue;
+
+
+                /* Skip over country code */
+                p += strcspn(p, WHITESPACE);
+                p += strspn(p, WHITESPACE);
+
+                /* Skip over coordinates */
+                p += strcspn(p, WHITESPACE);
+                p += strspn(p, WHITESPACE);
+
+                /* Found timezone name */
+                k = strcspn(p, WHITESPACE);
+                if (k <= 0)
+                        continue;
+
+                w = strndup(p, k);
+                if (!w)
+                        return log_oom();
+
+                z = realloc(zones, sizeof(char*) * (n_zones + 2));
+                if (!z) {
+                        free(w);
+                        return log_oom();
+                }
+
+                zones = z;
+                zones[n_zones++] = w;
+        }
+
+        if (zones)
+                zones[n_zones] = 0;
+
+        qsort(zones, n_zones, sizeof(char*), zone_compare);
+
+        pager_open_if_enabled();
+
+        STRV_FOREACH(i, zones)
+                puts(*i);
+
+        return 0;
+}
+
+static int help(void) {
+
+        printf("%s [OPTIONS...] {COMMAND} ...\n\n"
+               "Query or control system time and date settings.\n\n"
+               "  -h --help              Show this help\n"
+               "     --version           Show package version\n"
+               "     --fix-system        Adjust system clock when changing local RTC mode\n"
+               "     --no-pager          Do not pipe output into a pager\n"
+               "     --no-ask-password   Do not prompt for password\n"
+               "  -H --host=[USER@]HOST  Operate on remote host\n\n"
+               "Commands:\n"
+               "  status                          Show current time settings\n"
+               "  set-time [TIME]                 Set system time\n"
+               "  set-timezone [ZONE]             Set system timezone\n"
+               "  list-timezones                  Show known timezones\n"
+               "  set-local-rtc [BOOL]            Control whether RTC is in local time\n"
+               "  set-ntp [BOOL]                  Control whether NTP is enabled\n",
+               program_invocation_short_name);
+
+        return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+        enum {
+                ARG_VERSION = 0x100,
+                ARG_NO_PAGER,
+                ARG_FIX_SYSTEM,
+                ARG_NO_ASK_PASSWORD
+        };
+
+        static const struct option options[] = {
+                { "help",            no_argument,       NULL, 'h'                 },
+                { "version",         no_argument,       NULL, ARG_VERSION         },
+                { "no-pager",        no_argument,       NULL, ARG_NO_PAGER        },
+                { "host",            required_argument, NULL, 'H'                 },
+                { "privileged",      no_argument,       NULL, 'P'                 },
+                { "no-ask-password", no_argument,       NULL, ARG_NO_ASK_PASSWORD },
+                { "fix-system",      no_argument,       NULL, ARG_FIX_SYSTEM      },
+                { NULL,              0,                 NULL, 0                   }
+        };
+
+        int c;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "+hp:as:H:P", options, NULL)) >= 0) {
+
+                switch (c) {
+
+                case 'h':
+                        help();
+                        return 0;
+
+                case ARG_VERSION:
+                        puts(PACKAGE_STRING);
+                        puts(DISTRIBUTION);
+                        puts(SYSTEMD_FEATURES);
+                        return 0;
+
+                case 'P':
+                        arg_transport = TRANSPORT_POLKIT;
+                        break;
+
+                case 'H':
+                        arg_transport = TRANSPORT_SSH;
+                        arg_host = optarg;
+                        break;
+
+                case ARG_FIX_SYSTEM:
+                        arg_fix_system = true;
+                        break;
+
+                case ARG_NO_PAGER:
+                        arg_no_pager = true;
+                        break;
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        log_error("Unknown option code %c", c);
+                        return -EINVAL;
+                }
+        }
+
+        return 1;
+}
+
+static int timedatectl_main(DBusConnection *bus, int argc, char *argv[], DBusError *error) {
+
+        static const struct {
+                const char* verb;
+                const enum {
+                        MORE,
+                        LESS,
+                        EQUAL
+                } argc_cmp;
+                const int argc;
+                int (* const dispatch)(DBusConnection *bus, char **args, unsigned n);
+        } verbs[] = {
+                { "status",                LESS,   1, show_status      },
+                { "set-time",              EQUAL,  2, set_time         },
+                { "set-timezone",          EQUAL,  2, set_timezone     },
+                { "list-timezones",        EQUAL,  1, list_timezones   },
+                { "set-local-rtc",         EQUAL,  2, set_local_rtc    },
+                { "set-ntp",               EQUAL,  2, set_ntp,         },
+        };
+
+        int left;
+        unsigned i;
+
+        assert(argc >= 0);
+        assert(argv);
+        assert(error);
+
+        left = argc - optind;
+
+        if (left <= 0)
+                /* Special rule: no arguments means "status" */
+                i = 0;
+        else {
+                if (streq(argv[optind], "help")) {
+                        help();
+                        return 0;
+                }
+
+                for (i = 0; i < ELEMENTSOF(verbs); i++)
+                        if (streq(argv[optind], verbs[i].verb))
+                                break;
+
+                if (i >= ELEMENTSOF(verbs)) {
+                        log_error("Unknown operation %s", argv[optind]);
+                        return -EINVAL;
+                }
+        }
+
+        switch (verbs[i].argc_cmp) {
+
+        case EQUAL:
+                if (left != verbs[i].argc) {
+                        log_error("Invalid number of arguments.");
+                        return -EINVAL;
+                }
+
+                break;
+
+        case MORE:
+                if (left < verbs[i].argc) {
+                        log_error("Too few arguments.");
+                        return -EINVAL;
+                }
+
+                break;
+
+        case LESS:
+                if (left > verbs[i].argc) {
+                        log_error("Too many arguments.");
+                        return -EINVAL;
+                }
+
+                break;
+
+        default:
+                assert_not_reached("Unknown comparison operator.");
+        }
+
+        if (!bus) {
+                log_error("Failed to get D-Bus connection: %s", error->message);
+                return -EIO;
+        }
+
+        return verbs[i].dispatch(bus, argv + optind, left);
+}
+
+int main(int argc, char *argv[]) {
+        int r, retval = EXIT_FAILURE;
+        DBusConnection *bus = NULL;
+        DBusError error;
+
+        dbus_error_init(&error);
+
+        log_parse_environment();
+        log_open();
+
+        r = parse_argv(argc, argv);
+        if (r < 0)
+                goto finish;
+        else if (r == 0) {
+                retval = EXIT_SUCCESS;
+                goto finish;
+        }
+
+        if (arg_transport == TRANSPORT_NORMAL)
+                bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
+        else if (arg_transport == TRANSPORT_POLKIT)
+                bus_connect_system_polkit(&bus, &error);
+        else if (arg_transport == TRANSPORT_SSH)
+                bus_connect_system_ssh(NULL, arg_host, &bus, &error);
+        else
+                assert_not_reached("Uh, invalid transport...");
+
+        r = timedatectl_main(bus, argc, argv, &error);
+        retval = r < 0 ? EXIT_FAILURE : r;
+
+finish:
+        if (bus) {
+                dbus_connection_flush(bus);
+                dbus_connection_close(bus);
+                dbus_connection_unref(bus);
+        }
+
+        dbus_error_free(&error);
+        dbus_shutdown();
+
+        pager_close();
+
+        return retval;
+}