updater: Fix error "XHR request timed out"

zapret2/script-exec.sh

@@ -1,15 +1,22 @@
 #!/bin/sh
 # Copyright (c) 2024 remittor
+PID_FILE=/tmp/zapret-script-exec.pid
+[ -f $PID_FILE ] && exit 70
 LOG_FILE=$1
 RC_FILE=$1.rc
-shift 1
+SH_FILE=$2
+shift 2
+[ ! -f $SH_FILE ] && exit 71
 : > $LOG_FILE
 : > $RC_FILE
-(
-	exec </dev/null >/dev/null 2>&1
-	"$@" >> $LOG_FILE 2>&1
-	RETCODE=$?
+start-stop-daemon -S -b -p $PID_FILE -x /bin/sh -- -c '
+	LOG_FILE=$1
+	RC_FILE=$2
+	SH_FILE=$3
+	shift 3
+	sh $SH_FILE "$@" > $LOG_FILE 2>&1
+	RET_CODE=$?
 	sleep 1
-	echo $RETCODE > $RC_FILE
-) &
+	echo $RET_CODE > $RC_FILE
+' sh $LOG_FILE $RC_FILE $SH_FILE "$@"
 exit 0