/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2012 Lennart Poettering
Copyright 2013 Kay Sievers
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 .
***/
#include
#include
#include
#include
#include
#include
#include
#include "sd-bus.h"
#include "bus-util.h"
#include "bus-error.h"
#include "util.h"
#include "spawn-polkit-agent.h"
#include "build.h"
#include "strv.h"
#include "pager.h"
#include "time-dst.h"
static bool arg_adjust_system_clock = false;
static bool arg_no_pager = false;
static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
static bool arg_ask_password = true;
static char *arg_host = NULL;
static void pager_open_if_enabled(void) {
if (arg_no_pager)
return;
pager_open(false);
}
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 {
usec_t time;
const char *timezone;
usec_t rtc_time;
bool rtc_local;
bool ntp_enabled;
bool ntp_capable;
bool ntp_synced;
} StatusInfo;
static const char *jump_str(int delta_minutes, char *s, size_t size) {
if (delta_minutes == 60)
return "one hour forward";
if (delta_minutes == -60)
return "one hour backwards";
if (delta_minutes < 0) {
snprintf(s, size, "%i minutes backwards", -delta_minutes);
return s;
}
if (delta_minutes > 0) {
snprintf(s, size, "%i minutes forward", delta_minutes);
return s;
}
return "";
}
static void print_status_info(StatusInfo *i) {
char a[FORMAT_TIMESTAMP_MAX];
char b[FORMAT_TIMESTAMP_MAX];
char s[32];
struct tm tm;
time_t sec;
char *zc, *zn;
time_t t, tc, tn;
int dn;
bool is_dstc, is_dstn;
int r;
assert(i);
/* Enforce the values of /etc/localtime */
if (getenv("TZ")) {
fprintf(stderr, "Warning: ignoring the TZ variable, reading the system's timezone setting only.\n\n");
unsetenv("TZ");
}
sec = (time_t) (i->time / USEC_PER_SEC);
zero(tm);
assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&sec, &tm)) > 0);
char_array_0(a);
printf(" Local time: %s\n", a);
zero(tm);
assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S UTC", gmtime_r(&sec, &tm)) > 0);
char_array_0(a);
printf(" Universal time: %s\n", a);
if (i->rtc_time > 0) {
time_t rtc_sec;
rtc_sec = (time_t)(i->rtc_time / USEC_PER_SEC);
zero(tm);
assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S", gmtime_r(&rtc_sec, &tm)) > 0);
char_array_0(a);
printf(" RTC time: %s\n", a);
} else
printf(" RTC time: n/a\n");
zero(tm);
assert_se(strftime(a, sizeof(a), "%Z, %z", localtime_r(&sec, &tm)) > 0);
char_array_0(a);
printf(" Timezone: %s (%s)\n"
" NTP enabled: %s\n"
"NTP synchronized: %s\n"
" RTC in local TZ: %s\n",
strna(i->timezone), a,
i->ntp_capable ? yes_no(i->ntp_enabled) : "n/a",
yes_no(i->ntp_synced),
yes_no(i->rtc_local));
r = time_get_dst(sec, "/etc/localtime",
&tc, &zc, &is_dstc,
&tn, &dn, &zn, &is_dstn);
if (r < 0)
printf(" DST active: n/a\n");
else {
printf(" DST active: %s\n", yes_no(is_dstc));
t = tc - 1;
zero(tm);
assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&t, &tm)) > 0);
char_array_0(a);
zero(tm);
assert_se(strftime(b, sizeof(b), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&tc, &tm)) > 0);
char_array_0(b);
printf(" Last DST change: DST %s at\n"
" %s\n"
" %s\n",
is_dstc ? "began" : "ended", a, b);
t = tn - 1;
zero(tm);
assert_se(strftime(a, sizeof(a), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&t, &tm)) > 0);
char_array_0(a);
zero(tm);
assert_se(strftime(b, sizeof(b), "%a %Y-%m-%d %H:%M:%S %Z", localtime_r(&tn, &tm)) > 0);
char_array_0(b);
printf(" Next DST change: DST %s (the clock jumps %s) at\n"
" %s\n"
" %s\n",
is_dstn ? "begins" : "ends", jump_str(dn, s, sizeof(s)), a, b);
free(zc);
free(zn);
}
if (i->rtc_local)
fputs("\n" ANSI_HIGHLIGHT_ON
"Warning: The RTC is configured to maintain time in the local timezone. 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 get_timedate_property_bool(sd_bus *bus, const char *name, bool *target) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
int r, b;
assert(name);
r = sd_bus_get_property_trivial(
bus,
"org.freedesktop.timedate1",
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
name,
&error,
'b', &b);
if (r < 0) {
log_error("Failed to get property: %s %s", name, bus_error_message(&error, -r));
return r;
}
*target = b;
return 0;
}
static int get_timedate_property_usec(sd_bus *bus, const char *name, usec_t *target) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
assert(name);
r = sd_bus_get_property_trivial(
bus,
"org.freedesktop.timedate1",
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
name,
&error,
't', target);
if (r < 0) {
log_error("Failed to get property: %s %s", name, bus_error_message(&error, -r));
return r;
}
return 0;
}
static int show_status(sd_bus *bus, char **args, unsigned n) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
StatusInfo info = {};
assert(bus);
r = sd_bus_get_property(
bus,
"org.freedesktop.timedate1",
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
"Timezone",
&error,
&reply,
"s");
if (r < 0) {
log_error("Failed to get property: Timezone %s", bus_error_message(&error, -r));
return r;
}
r = sd_bus_message_read(reply, "s", &info.timezone);
if (r < 0)
return r;
r = get_timedate_property_bool(bus, "LocalRTC", &info.rtc_local);
if (r < 0)
return r;
r = get_timedate_property_bool(bus, "NTP", &info.ntp_enabled);
if (r < 0)
return r;
r = get_timedate_property_bool(bus, "CanNTP", &info.ntp_capable);
if (r < 0)
return r;
r = get_timedate_property_bool(bus, "NTPSynchronized", &info.ntp_synced);
if (r < 0)
return r;
r = get_timedate_property_usec(bus, "TimeUSec", &info.time);
if (r < 0)
return r;
r = get_timedate_property_usec(bus, "RTCTimeUSec", &info.rtc_time);
if (r < 0)
return r;
print_status_info(&info);
return 0;
}
static int set_time(sd_bus *bus, char **args, unsigned n) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
bool relative = false, interactive = arg_ask_password;
usec_t t;
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;
}
r = sd_bus_call_method(bus,
"org.freedesktop.timedate1",
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
"SetTime",
&error,
NULL,
"xbb", (int64_t)t, relative, interactive);
if (r < 0)
log_error("Failed to set time: %s", bus_error_message(&error, -r));
return r;
}
static int set_timezone(sd_bus *bus, char **args, unsigned n) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
assert(args);
assert(n == 2);
polkit_agent_open_if_enabled();
r = sd_bus_call_method(bus,
"org.freedesktop.timedate1",
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
"SetTimezone",
&error,
NULL,
"sb", args[1], arg_ask_password);
if (r < 0)
log_error("Failed to set timezone: %s", bus_error_message(&error, -r));
return r;
}
static int set_local_rtc(sd_bus *bus, char **args, unsigned n) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
int r, b;
assert(args);
assert(n == 2);
polkit_agent_open_if_enabled();
b = parse_boolean(args[1]);
if (b < 0) {
log_error("Failed to parse local RTC setting: %s", args[1]);
return b;
}
r = sd_bus_call_method(bus,
"org.freedesktop.timedate1",
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
"SetLocalRTC",
&error,
NULL,
"bbb", b, arg_adjust_system_clock, arg_ask_password);
if (r < 0)
log_error("Failed to set local RTC: %s", bus_error_message(&error, -r));
return r;
}
static int set_ntp(sd_bus *bus, char **args, unsigned n) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
int b, r;
assert(args);
assert(n == 2);
polkit_agent_open_if_enabled();
b = parse_boolean(args[1]);
if (b < 0) {
log_error("Failed to parse NTP setting: %s", args[1]);
return b;
}
r = sd_bus_call_method(bus,
"org.freedesktop.timedate1",
"/org/freedesktop/timedate1",
"org.freedesktop.timedate1",
"SetNTP",
&error,
NULL,
"bb", b, arg_ask_password);
if (r < 0)
log_error("Failed to set ntp: %s", bus_error_message(&error, -r));
return r;
}
static int list_timezones(sd_bus *bus, char **args, unsigned n) {
_cleanup_fclose_ FILE *f = NULL;
_cleanup_strv_free_ char **zones = NULL;
size_t n_zones = 0;
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] = NULL;
pager_open_if_enabled();
strv_sort(zones);
strv_print(zones);
return 0;
}
static int help(void) {
printf("%s [OPTIONS...] COMMAND ...\n\n"
"Query or change system time and date settings.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --adjust-system-clock\n"
" 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"
" -M --machine=CONTAINER Operate on local container\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_ADJUST_SYSTEM_CLOCK,
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' },
{ "machine", required_argument, NULL, 'M' },
{ "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
{ "adjust-system-clock", no_argument, NULL, ARG_ADJUST_SYSTEM_CLOCK },
{ NULL, 0, NULL, 0 }
};
int c;
assert(argc >= 0);
assert(argv);
while ((c = getopt_long(argc, argv, "hH:M:", options, NULL)) >= 0) {
switch (c) {
case 'h':
help();
return 0;
case ARG_VERSION:
puts(PACKAGE_STRING);
puts(SYSTEMD_FEATURES);
return 0;
case 'H':
arg_transport = BUS_TRANSPORT_REMOTE;
arg_host = optarg;
break;
case 'M':
arg_transport = BUS_TRANSPORT_CONTAINER;
arg_host = optarg;
break;
case ARG_NO_ASK_PASSWORD:
arg_ask_password = false;
break;
case ARG_ADJUST_SYSTEM_CLOCK:
arg_adjust_system_clock = 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(sd_bus *bus, int argc, char *argv[]) {
static const struct {
const char* verb;
const enum {
MORE,
LESS,
EQUAL
} argc_cmp;
const int argc;
int (* const dispatch)(sd_bus *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);
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.");
}
return verbs[i].dispatch(bus, argv + optind, left);
}
int main(int argc, char *argv[]) {
int r, ret = EXIT_FAILURE;
_cleanup_bus_unref_ sd_bus *bus = NULL;
setlocale(LC_ALL, "");
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
if (r < 0)
goto finish;
else if (r == 0) {
ret = EXIT_SUCCESS;
goto finish;
}
r = bus_open_transport(arg_transport, arg_host, false, &bus);
if (r < 0) {
log_error("Failed to create bus connection: %s", strerror(-r));
ret = EXIT_FAILURE;
goto finish;
}
r = timedatectl_main(bus, argc, argv);
ret = r < 0 ? EXIT_FAILURE : r;
finish:
pager_close();
return ret;
}