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systemd-sleep: Set SYSTEMD_SLEEP_ACTION for systemd-sleep hooks.

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When suspend-then-hibernate is called, hooks have no ability to determine which
stage of the request is being handled; they only see 'pre' and 'post' with the
verb 'suspend-then-hibernate'. This change introduces an environment variable
called SYSTEMD_SLEEP_ACTION that contains the name of the action that is
processing: 'suspend', 'hibernate', 'hybrid-sleep', or
'suspend-after-failed-hibernate'.
This commit is contained in:
Zach Smith 2021-01-07 18:06:30 -08:00 committed by Yu Watanabe
parent 83f0ff1eda
commit ae463e4ef2
2 changed files with 13 additions and 6 deletions
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5
man/systemd-suspend.service.xml
View File

@ -56,7 +56,10 @@
<literal>pre</literal>, the second either
<literal>suspend</literal>, <literal>hibernate</literal>,
<literal>hybrid-sleep</literal>, or <literal>suspend-then-hibernate</literal>
depending on the chosen action.
depending on the chosen action. An environment variable called <literal>SYSTEMD_SLEEP_ACTION</literal>
will be set and contain the sleep action that is processing. This is primarily helpful for
<literal>suspend-then-hibernate</literal> where the value of the variable will be <literal>suspend</literal>, <literal>hibernate</literal>,
or <literal>suspend-after-failed-hibernate</literal> in cases where hibernation has failed.
Immediately after leaving system suspend and/or hibernation the
same executables are run, but the first argument is now
<literal>post</literal>. All executables in this directory are

14
src/sleep/sleep.c
View File

@ -169,7 +169,7 @@ static int lock_all_homes(void) {
return log_debug("Successfully requested locking of all home directories.");
}
static int execute(char **modes, char **states) {
static int execute(char **modes, char **states, const char *action) {
char *arguments[] = {
NULL,
(char*) "pre",
@ -211,6 +211,10 @@ static int execute(char **modes, char **states) {
return log_error_errno(r, "Failed to write mode to /sys/power/disk: %m");;
}
r = setenv("SYSTEMD_SLEEP_ACTION", action, 1);
if (r != 0)
log_warning_errno(errno, "Error setting SYSTEMD_SLEEP_ACTION=%s: %m", action);
(void) execute_directories(dirs, DEFAULT_TIMEOUT_USEC, NULL, NULL, arguments, NULL, EXEC_DIR_PARALLEL | EXEC_DIR_IGNORE_ERRORS);
(void) lock_all_homes();
@ -258,7 +262,7 @@ static int execute_s2h(const SleepConfig *sleep_config) {
if (r < 0)
return log_error_errno(errno, "Error setting hibernate timer: %m");
r = execute(sleep_config->suspend_modes, sleep_config->suspend_states);
r = execute(sleep_config->suspend_modes, sleep_config->suspend_states, "suspend");
if (r < 0)
return r;
@ -274,11 +278,11 @@ static int execute_s2h(const SleepConfig *sleep_config) {
log_debug("Attempting to hibernate after waking from %s timer",
format_timespan(buf, sizeof(buf), sleep_config->hibernate_delay_sec, USEC_PER_SEC));
r = execute(sleep_config->hibernate_modes, sleep_config->hibernate_states);
r = execute(sleep_config->hibernate_modes, sleep_config->hibernate_states, "hibernate");
if (r < 0) {
log_notice_errno(r, "Couldn't hibernate, will try to suspend again: %m");
r = execute(sleep_config->suspend_modes, sleep_config->suspend_states);
r = execute(sleep_config->suspend_modes, sleep_config->suspend_states, "suspend-after-failed-hibernate");
if (r < 0)
return log_error_errno(r, "Could neither hibernate nor suspend, giving up: %m");
}
@ -387,7 +391,7 @@ static int run(int argc, char *argv[]) {
if (streq(arg_verb, "suspend-then-hibernate"))
return execute_s2h(sleep_config);
else
return execute(modes, states);
return execute(modes, states, arg_verb);
}
DEFINE_MAIN_FUNCTION(run);