Reset sxmo_run_periodically.sh wait first feature

scripts/core/sxmo_run_periodically.sh

@@ -2,6 +2,11 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 # Copyright 2022 Sxmo Contributors
 
+if [ "$1" = "-" ]; then
+	waitfirst=1
+	shift
+fi
+
 timeout="$1"
 shift
 
@@ -13,6 +18,13 @@ finish() {
 
 trap 'finish' TERM INT
 
+if [ -n "$waitfirst" ]; then
+	sleep "$timeout" &
+	SLEEPPID="$!"
+	wait "$SLEEPPID"
+	unset SLEEPPID
+fi
+
 while : ; do
 	"$@" &
 	CMDPID="$!"