Allow suspend without wakeup time

etc/autosuspend

@@ -10,6 +10,9 @@ DONT_SUSPEND_BY_DAY='no'
 # Automatically reboot once a week when the system isn't in use
 REBOOT_ONCE_PER_WEEK='yes'
 
+# Allow suspend when no wakeup time exists
+SUSPEND_WITHOUT_WAKEUP='no'
+
 # Daemons that always have one process running, only if more that one process is active we prevent the suspend
 # The values are used with grep, so just a unique portion is sufficient
 DAEMONS=''

usr/local/sbin/autosuspend.main

@@ -132,7 +132,11 @@ if [ "$AUTO_SUSPEND" = "true" ] || [ "$AUTO_SUSPEND" = "yes" ] ; then
                                         logit "Suspend method: $suspend_method"
                                         SetWakeupTime
                                         wakeup_time=$(cat /sys/class/rtc/rtc0/wakealarm)
-                                        if [[ "$wakeup_time" -le $(date +%s) ]]; then
+                                        if [[ -z "$wakeup_time" ]] && [[ "${SUSPEND_WITHOUT_WAKEUP:-no}" != "yes" ]]; then
+                                            logit "Aborting suspend because of missing wakeup time"
+                                            exit 3
+                                        fi
+                                        if [[ -n "$wakeup_time" ]] && [[ "$wakeup_time" -le $(date +%s) ]]; then
                                             logit "Aborting suspend because wakeup time" $(date --date @$wakeup_time) "is in the past"
                                             exit 2
                                         fi