[ #12 ] Adding scheduled shutdown

This commit adds support for a new global directive "ShutdownTime", like ContestTimes or ConfigExpirationTime, that schedules a shutdown at the time defined.

base-system/usrroot/usr/lib/hsync/libhapply.so

@@ -47,6 +47,7 @@ apply_global_directives() {
 	set_timezone
 	set_keyboards
 	set_current_keyboard
+	set_scheduled_shutdown
 
 	return 0 # success
 }
@@ -404,3 +405,22 @@ set_wallpaper() {
 	log "-Couldn't find any background to restore"
 	return 1 # error
 }
+
+set_scheduled_shutdown() {
+	SHUTDOWN_TIME="$(get_directives_var Global ShutdownTime)"
+	if [ "$SHUTDOWN_TIME" = "none" ]; then
+		return 0
+	fi
+	log "Cancelling scheduled poweroff (if any)"
+	shutdown -c
+	SHUTDOWN_TIME_EPOCH=$(date -d "$SHUTDOWN_TIME" +%s)
+	CURRENT_TIME_EPOCH=$(date +%s)
+	SECONDS_TO_SHUTDOWN=$((SHUTDOWN_TIME_EPOCH-CURRENT_TIME_EPOCH))
+	if [ "$SECONDS_TO_SHUTDOWN" -lt 0 ]; then
+		log "Current shutdown is for a time that already happened, skiping scheduled shutdown."
+		exit 0
+	fi
+	MINUTES_TO_SHUTDOWN=$((SECONDS_TO_SHUTDOWN/60))
+	log "Scheduling shutdown in $MINUTES_TO_SHUTDOWN minute(s)"
+	shutdown +"$MINUTES_TO_SHUTDOWN"
+}

base-system/usrroot/usr/lib/hsync/libhupdate.so

@@ -77,6 +77,7 @@ have_global_config_changed() {
 	is_var_equal "DefaultKeyboardLayout" "$CURRENT_DIRECTIVES" "$NEW_DIRECTIVES" || return 0    # true, have-changed
 	is_var_equal "EventConfig" "$CURRENT_DIRECTIVES" "$NEW_DIRECTIVES" || return 0              # true, have-changed
 	is_var_equal "ContestConfig" "$CURRENT_DIRECTIVES" "$NEW_DIRECTIVES" || return 0            # true, have-changed
+	is_var_equal "ShutdownTime" "$CURRENT_DIRECTIVES" "$NEW_DIRECTIVES" || return 0     # true, have-changed
 
 	return 1 # false, have-not-changed
 }

base-system/usrroot/usr/sbin/hos-dvar

@@ -41,11 +41,11 @@ main() {
 			help
 			exit 0
 			;;
-		"--variable-name")
+		"--variable-name" | "-v")
 			VAR_NAME="$2"
 			shift 2
 			;;
-		"--section")
+		"--section" | "-s")
 			SECTION="$2"
 			shift 2
 			;;

docs/usage/directives/configurations/shutdown-time.md

@@ -0,0 +1,12 @@
+# Shutdown time
+
+`ShutdownTime=[ ISO8601_TIME | none ]`
+
+Allows to set a specific time in the global section when the instances should shutdown.
+
+Example:
+
+`ShutdownTime=2023-06-02T13:58:00`
+
+Note:
+It might happen that (although every machine will turn off) not every machine will shut down at the same time because the shutdown command used doesn't have an accuracy of seconds, so it is expected that some computers power off in groups or one after another.