diff --git a/scripts/starts/start_legacy_wd.sh b/scripts/starts/start_legacy_wd.sh
index e5cdaa8e..fbc5a820 100644
--- a/scripts/starts/start_legacy_wd.sh
+++ b/scripts/starts/start_legacy_wd.sh
@@ -1,20 +1,28 @@
 
-[ -z "$CRASHDIR" ] && CRASHDIR=$( cd $(dirname $0);cd ..;pwd)
+[ -z "$CRASHDIR" ] && CRASHDIR=$(cd "$(dirname "$0")"/.. && pwd)
 PIDFILE="/tmp/ShellCrash/$1.pid"
 
 [ -f "$CRASHDIR"/.start_error ] && [ ! -f /tmp/ShellCrash/crash_start_time ] && exit 1 #当启动失败后禁止开机自启动
 
 if [ -f "$PIDFILE" ]; then
 	PID="$(cat "$PIDFILE")"
-	if [ -n "$PID" ] && [ -d "/proc/$PID" ]; then
-		return 0
+	if [ -n "$PID" ] && [ "$PID" -eq "$PID" ] 2>/dev/null; then
+		if kill -0 "$PID" 2>/dev/null || [ -d "/proc/$PID" ]; then
+			return 0
+		fi
+	else
+		rm -f "$PIDFILE"
 	fi
 fi
+
 #如果没有进程则拉起
-if [ "$1" = shellcrash ];then
-	"$CRASHDIR"/start.sh start
-else
-	. "$CRASHDIR"/starts/start_legacy.sh
-	start_legacy "$CRASHDIR/menus/bot_tg.sh" "$1"
+LOCKDIR="/tmp/ShellCrash/start_$1.lock"
+if mkdir "$LOCKDIR" 2>/dev/null; then
+    if [ "$1" = "shellcrash" ]; then
+        "$CRASHDIR"/start.sh start
+    else
+        [ -f "$CRASHDIR/starts/start_legacy.sh" ] && . "$CRASHDIR/starts/start_legacy.sh"
+        start_legacy "$CRASHDIR/menus/bot_tg.sh" "$1"
+    fi
+    rm -d "$LOCKDIR" 2>/dev/null
 fi
-		
\ No newline at end of file