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systemctl: add option --when for scheduled shutdown

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Pass an empty string or "cancel" will cancel the action.
Pass "show" will show the scheduled actions.

Replaces #17258
This commit is contained in:
Mike Yuan 2023-03-05 23:27:44 +08:00
parent 92b00e8678
commit 1433e1f998
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GPG Key ID: 417471C0A40F58B3
4 changed files with 87 additions and 37 deletions
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41
man/systemctl.xml
View File

@ -1486,6 +1486,9 @@ Jan 12 10:46:45 example.com bluetoothd[8900]: gatt-time-server: Input/output err
<option>--force</option> is specified twice the halt operation is executed by <command>systemctl</command>
itself, and the system manager is not contacted. This means the command should succeed even when the system
manager has crashed.</para>
<para>If combined with <option>--when=</option>, shutdown will be scheduled after the given timestamp.
And <option>--when=cancel</option> will cancel the shutdown.</para>
</listitem>
</varlistentry>
<varlistentry>
@ -1497,13 +1500,8 @@ Jan 12 10:46:45 example.com bluetoothd[8900]: gatt-time-server: Input/output err
users. This command is asynchronous; it will return after the power-off operation is enqueued, without
waiting for it to complete.</para>
<para>If combined with <option>--force</option>, shutdown of all running services is skipped, however all
processes are killed and all file systems are unmounted or mounted read-only, immediately followed by the
powering off. If <option>--force</option> is specified twice, the operation is immediately executed without
terminating any processes or unmounting any file systems. This may result in data loss. Note that when
<option>--force</option> is specified twice the power-off operation is executed by
<command>systemctl</command> itself, and the system manager is not contacted. This means the command should
succeed even when the system manager has crashed.</para>
<para>This command honors <option>--force</option> and <option>--when=</option> in a similar way
as <command>halt</command>.</para>
</listitem>
</varlistentry>
<varlistentry>
@ -1517,14 +1515,6 @@ Jan 12 10:46:45 example.com bluetoothd[8900]: gatt-time-server: Input/output err
users. This command is asynchronous; it will return after the reboot operation is enqueued,
without waiting for it to complete.</para>
<para>If combined with <option>--force</option>, shutdown of all running services is skipped, however all
processes are killed and all file systems are unmounted or mounted read-only, immediately followed by the
reboot. If <option>--force</option> is specified twice, the operation is immediately executed without
terminating any processes or unmounting any file systems. This may result in data loss. Note that when
<option>--force</option> is specified twice the reboot operation is executed by
<command>systemctl</command> itself, and the system manager is not contacted. This means the command should
succeed even when the system manager has crashed.</para>
<para>If the switch <option>--reboot-argument=</option> is given, it will be passed as the optional
argument to the <citerefentry><refentrytitle>reboot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
system call.</para>
@ -1532,6 +1522,9 @@ Jan 12 10:46:45 example.com bluetoothd[8900]: gatt-time-server: Input/output err
<para>Options <option>--boot-loader-entry=</option>, <option>--boot-loader-menu=</option>, and
<option>--firmware-setup</option> can be used to select what to do <emphasis>after</emphasis> the
reboot. See the descriptions of those options for details.</para>
<para>This command honors <option>--force</option> and <option>--when=</option> in a similar way
as <command>halt</command>.</para>
</listitem>
</varlistentry>
@ -1544,9 +1537,8 @@ Jan 12 10:46:45 example.com bluetoothd[8900]: gatt-time-server: Input/output err
asynchronous; it will return after the reboot operation is enqueued, without waiting for it to
complete.</para>
<para>If combined with <option>--force</option>, shutdown of all running services is skipped, however all
processes are killed and all file systems are unmounted or mounted read-only, immediately followed by the
reboot.</para>
<para>This command honors <option>--force</option> and <option>--when=</option> in a similar way
as <command>halt</command>.</para>
</listitem>
</varlistentry>
@ -2477,6 +2469,19 @@ Jan 12 10:46:45 example.com bluetoothd[8900]: gatt-time-server: Input/output err
</listitem>
</varlistentry>
<varlistentry>
<term><option>--when=</option></term>
<listitem>
<para>When used with <command>halt</command>, <command>poweroff</command>, <command>reboot</command>
or <command>kexec</command>, schedule the action to be performed at the given timestamp,
which should adhere to the syntax documented in <citerefentry
project='man-pages'><refentrytitle>systemd.time</refentrytitle><manvolnum>7</manvolnum></citerefentry>
section "PARSING TIMESTAMPS". Specially, if <literal>show</literal> is given, the currently scheduled
action will be shown, which can be canceled by passing an empty string or <literal>cancel</literal>.</para>
</listitem>
</varlistentry>
<xi:include href="user-system-options.xml" xpointer="host" />
<xi:include href="user-system-options.xml" xpointer="machine" />

24
src/systemctl/systemctl-logind.c
View File

@ -356,7 +356,7 @@ int logind_show_shutdown(void) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
sd_bus *bus;
const char *action = NULL;
const char *action, *pretty_action;
uint64_t elapse;
int r;
@ -376,17 +376,23 @@ int logind_show_shutdown(void) {
return log_error_errno(SYNTHETIC_ERRNO(ENODATA), "No scheduled shutdown.");
if (STR_IN_SET(action, "halt", "poweroff", "exit"))
action = "Shutdown";
pretty_action = "Shutdown";
else if (streq(action, "kexec"))
action = "Reboot via kexec";
pretty_action = "Reboot via kexec";
else if (streq(action, "reboot"))
action = "Reboot";
pretty_action = "Reboot";
else /* If we don't recognize the action string, we'll show it as-is */
pretty_action = action;
/* If we don't recognize the action string, we'll show it as-is */
log_info("%s scheduled for %s, use 'shutdown -c' to cancel.",
action,
FORMAT_TIMESTAMP_STYLE(elapse, arg_timestamp_style));
if (arg_action == ACTION_SYSTEMCTL)
log_info("%s scheduled for %s, use 'systemctl %s --when=cancel' to cancel.",
pretty_action,
FORMAT_TIMESTAMP_STYLE(elapse, arg_timestamp_style),
action);
else
log_info("%s scheduled for %s, use 'shutdown -c' to cancel.",
pretty_action,
FORMAT_TIMESTAMP_STYLE(elapse, arg_timestamp_style));
return 0;
#else

31
src/systemctl/systemctl-start-special.c
View File

@ -197,22 +197,33 @@ int verb_start_special(int argc, char *argv[], void *userdata) {
ACTION_POWEROFF,
ACTION_REBOOT,
ACTION_KEXEC,
ACTION_HALT,
ACTION_SUSPEND,
ACTION_HIBERNATE,
ACTION_HYBRID_SLEEP,
ACTION_SUSPEND_THEN_HIBERNATE)) {
ACTION_HALT)) {
r = logind_reboot(a);
if (r >= 0)
return r;
if (IN_SET(r, -EACCES, -EOPNOTSUPP, -EINPROGRESS))
/* Requested operation requires auth, is not supported or already in progress */
if (arg_when == 0)
r = logind_reboot(a);
else if (arg_when != USEC_INFINITY)
r = logind_schedule_shutdown(a);
else /* arg_when == USEC_INFINITY */
r = logind_cancel_shutdown();
if (r >= 0 || IN_SET(r, -EACCES, -EOPNOTSUPP, -EINPROGRESS))
/* The latter indicates that the requested operation requires auth,
* is not supported or already in progress, in which cases we ignore the error. */
return r;
/* On all other errors, try low-level operation. In order to minimize the difference
* between operation with and without logind, we explicitly enable non-blocking mode
* for this, as logind's shutdown operations are always non-blocking. */
arg_no_block = true;
} else if (IN_SET(a,
ACTION_SUSPEND,
ACTION_HIBERNATE,
ACTION_HYBRID_SLEEP,
ACTION_SUSPEND_THEN_HIBERNATE)) {
r = logind_reboot(a);
if (r >= 0 || IN_SET(r, -EACCES, -EOPNOTSUPP, -EINPROGRESS))
return r;
arg_no_block = true;

28
src/systemctl/systemctl.c
View File

@ -323,6 +323,8 @@ static int systemctl_help(void) {
" --mkdir Create directory before mounting, if missing\n"
" --marked Restart/reload previously marked units\n"
" --drop-in=NAME Edit unit files using the specified drop-in file name\n"
" --when=TIME Schedule halt/power-off/reboot/kexec action after\n"
" a certain timestamp\n"
"\nSee the %2$s for details.\n",
program_invocation_short_name,
link,
@ -447,6 +449,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
ARG_MARKED,
ARG_NO_WARN,
ARG_DROP_IN,
ARG_WHEN,
};
static const struct option options[] = {
@ -511,6 +514,7 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
{ "mkdir", no_argument, NULL, ARG_MKDIR },
{ "marked", no_argument, NULL, ARG_MARKED },
{ "drop-in", required_argument, NULL, ARG_DROP_IN },
{ "when", required_argument, NULL, ARG_WHEN },
{}
};
@ -975,6 +979,30 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
arg_drop_in = optarg;
break;
case ARG_WHEN:
if (streq(optarg, "show")) {
r = logind_show_shutdown();
if (r < 0 && r != -ENODATA)
return r;
return 0;
}
if (STR_IN_SET(optarg, "", "cancel")) {
arg_when = USEC_INFINITY;
break;
}
r = parse_timestamp(optarg, &arg_when);
if (r < 0)
return log_error_errno(r, "Failed to parse --when= argument '%s': %m", optarg);
if (!timestamp_is_set(arg_when))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Invalid timestamp '%s' specified for --when=.", optarg);
break;
case '.':
/* Output an error mimicking getopt, and print a hint afterwards */
log_error("%s: invalid option -- '.'", program_invocation_name);