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core: optionally, trigger .timer units on timezone and clock changes

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Fixes: #6228
This commit is contained in:
Lennart Poettering 2019-03-14 21:36:47 +01:00
parent 787be190a8
commit efebb613c7
7 changed files with 61 additions and 10 deletions
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4
docs/TRANSIENT-SETTINGS.md
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@ -335,10 +335,12 @@ All automount unit setting is available to transient units:
Most timer unit settings are available to transient units.
```
✓ OnCalendar=
✓ OnActiveSec=
✓ OnBootSec=
✓ OnCalendar=
✓ OnClockChange=
✓ OnStartupSec=
✓ OnTimezoneChange
✓ OnUnitActiveSec=
✓ OnUnitInactiveSec=
✓ Persistent=

8
src/core/dbus-timer.c
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@ -123,6 +123,8 @@ const sd_bus_vtable bus_timer_vtable[] = {
SD_BUS_PROPERTY("Unit", "s", bus_property_get_triggered_unit, 0, SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("TimersMonotonic", "a(stt)", property_get_monotonic_timers, 0, SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
SD_BUS_PROPERTY("TimersCalendar", "a(sst)", property_get_calendar_timers, 0, SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION),
SD_BUS_PROPERTY("OnClockChange", "b", bus_property_get_bool, offsetof(Timer, on_clock_change), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("OnTimezoneChange", "b", bus_property_get_bool, offsetof(Timer, on_timezone_change), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("NextElapseUSecRealtime", "t", bus_property_get_usec, offsetof(Timer, next_elapse_realtime), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
SD_BUS_PROPERTY("NextElapseUSecMonotonic", "t", property_get_next_elapse_monotonic, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
BUS_PROPERTY_DUAL_TIMESTAMP("LastTriggerUSec", offsetof(Timer, last_trigger), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
@ -171,6 +173,12 @@ static int bus_timer_set_transient_property(
if (streq(name, "RemainAfterElapse"))
return bus_set_transient_bool(u, name, &t->remain_after_elapse, message, flags, error);
if (streq(name, "OnTimezoneChange"))
return bus_set_transient_bool(u, name, &t->on_timezone_change, message, flags, error);
if (streq(name, "OnClockChange"))
return bus_set_transient_bool(u, name, &t->on_clock_change, message, flags, error);
if (streq(name, "TimersMonotonic")) {
const char *base_name;
usec_t usec = 0;

2
src/core/load-fragment-gperf.gperf.m4
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@ -433,6 +433,8 @@ Timer.OnBootSec, config_parse_timer, TIMER_BOOT,
Timer.OnStartupSec, config_parse_timer, TIMER_STARTUP, 0
Timer.OnUnitActiveSec, config_parse_timer, TIMER_UNIT_ACTIVE, 0
Timer.OnUnitInactiveSec, config_parse_timer, TIMER_UNIT_INACTIVE, 0
Timer.OnClockChange, config_parse_bool, 0, offsetof(Timer, on_clock_change)
Timer.OnTimezoneChange, config_parse_bool, 0, offsetof(Timer, on_timezone_change)
Timer.Persistent, config_parse_bool, 0, offsetof(Timer, persistent)
Timer.WakeSystem, config_parse_bool, 0, offsetof(Timer, wake_system)
Timer.RemainAfterElapse, config_parse_bool, 0, offsetof(Timer, remain_after_elapse)

30
src/core/timer.c
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@ -77,7 +77,7 @@ static int timer_verify(Timer *t) {
if (UNIT(t)->load_state != UNIT_LOADED)
return 0;
if (!t->values) {
if (!t->values && !t->on_clock_change && !t->on_timezone_change) {
log_unit_error(UNIT(t), "Timer unit lacks value setting. Refusing.");
return -ENOEXEC;
}
@ -215,14 +215,18 @@ static void timer_dump(Unit *u, FILE *f, const char *prefix) {
"%sPersistent: %s\n"
"%sWakeSystem: %s\n"
"%sAccuracy: %s\n"
"%sRemainAfterElapse: %s\n",
"%sRemainAfterElapse: %s\n"
"%sOnClockChange: %s\n"
"%sOnTimeZoneChange %s\n",
prefix, timer_state_to_string(t->state),
prefix, timer_result_to_string(t->result),
prefix, trigger ? trigger->id : "n/a",
prefix, yes_no(t->persistent),
prefix, yes_no(t->wake_system),
prefix, format_timespan(buf, sizeof(buf), t->accuracy_usec, 1),
prefix, yes_no(t->remain_after_elapse));
prefix, yes_no(t->remain_after_elapse),
prefix, yes_no(t->on_clock_change),
prefix, yes_no(t->on_timezone_change));
LIST_FOREACH(value, v, t->values) {
@ -474,7 +478,7 @@ static void timer_enter_waiting(Timer *t, bool time_change) {
}
}
if (!found_monotonic && !found_realtime) {
if (!found_monotonic && !found_realtime && !t->on_timezone_change && !t->on_clock_change) {
log_unit_debug(UNIT(t), "Timer is elapsed.");
timer_enter_elapsed(t, leave_around);
return;
@ -815,8 +819,13 @@ static void timer_time_change(Unit *u) {
if (t->last_trigger.realtime > ts)
t->last_trigger.realtime = ts;
log_unit_debug(u, "Time change, recalculating next elapse.");
timer_enter_waiting(t, true);
if (t->on_clock_change) {
log_unit_debug(u, "Time change, triggering activation.");
timer_enter_running(t);
} else {
log_unit_debug(u, "Time change, recalculating next elapse.");
timer_enter_waiting(t, true);
}
}
static void timer_timezone_change(Unit *u) {
@ -827,8 +836,13 @@ static void timer_timezone_change(Unit *u) {
if (t->state != TIMER_WAITING)
return;
log_unit_debug(u, "Timezone change, recalculating next elapse.");
timer_enter_waiting(t, false);
if (t->on_timezone_change) {
log_unit_debug(u, "Timezone change, triggering activation.");
timer_enter_running(t);
} else {
log_unit_debug(u, "Timezone change, recalculating next elapse.");
timer_enter_waiting(t, false);
}
}
static const char* const timer_base_table[_TIMER_BASE_MAX] = {

2
src/core/timer.h
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@ -57,6 +57,8 @@ struct Timer {
bool persistent;
bool wake_system;
bool remain_after_elapse;
bool on_clock_change;
bool on_timezone_change;
char *stamp_path;
};

22
src/run/run.c
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@ -124,6 +124,8 @@ static int help(void) {
" --on-unit-active=SECONDS Run SECONDS after the last activation\n"
" --on-unit-inactive=SECONDS Run SECONDS after the last deactivation\n"
" --on-calendar=SPEC Realtime timer\n"
" --on-timezone-change Run when the timezone changes\n"
" --on-clock-change Run when the realtime clock jumps\n"
" --timer-property=NAME=VALUE Set timer unit property\n"
"\nSee the %s for details.\n"
, program_invocation_short_name
@ -170,6 +172,8 @@ static int parse_argv(int argc, char *argv[]) {
ARG_ON_UNIT_ACTIVE,
ARG_ON_UNIT_INACTIVE,
ARG_ON_CALENDAR,
ARG_ON_TIMEZONE_CHANGE,
ARG_ON_CLOCK_CHANGE,
ARG_TIMER_PROPERTY,
ARG_PATH_PROPERTY,
ARG_SOCKET_PROPERTY,
@ -210,6 +214,8 @@ static int parse_argv(int argc, char *argv[]) {
{ "on-unit-active", required_argument, NULL, ARG_ON_UNIT_ACTIVE },
{ "on-unit-inactive", required_argument, NULL, ARG_ON_UNIT_INACTIVE },
{ "on-calendar", required_argument, NULL, ARG_ON_CALENDAR },
{ "on-timezone-change",no_argument, NULL, ARG_ON_TIMEZONE_CHANGE},
{ "on-clock-change", no_argument, NULL, ARG_ON_CLOCK_CHANGE },
{ "timer-property", required_argument, NULL, ARG_TIMER_PROPERTY },
{ "path-property", required_argument, NULL, ARG_PATH_PROPERTY },
{ "socket-property", required_argument, NULL, ARG_SOCKET_PROPERTY },
@ -382,6 +388,22 @@ static int parse_argv(int argc, char *argv[]) {
arg_with_timer = true;
break;
case ARG_ON_TIMEZONE_CHANGE:
r = add_timer_property("OnTimezoneChange", "yes");
if (r < 0)
return r;
arg_with_timer = true;
break;
case ARG_ON_CLOCK_CHANGE:
r = add_timer_property("OnClockChange", "yes");
if (r < 0)
return r;
arg_with_timer = true;
break;
case ARG_TIMER_PROPERTY:
if (strv_extend(&arg_timer_property, optarg) < 0)

3
src/shared/bus-unit-util.c
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@ -1499,7 +1499,8 @@ static int bus_append_socket_property(sd_bus_message *m, const char *field, cons
static int bus_append_timer_property(sd_bus_message *m, const char *field, const char *eq) {
int r;
if (STR_IN_SET(field, "WakeSystem", "RemainAfterElapse", "Persistent"))
if (STR_IN_SET(field, "WakeSystem", "RemainAfterElapse", "Persistent",
"OnTimezoneChange", "OnClockChange"))
return bus_append_parse_boolean(m, field, eq);