pipeline: Fixed a potential name getting error

Signed-off-by: Alexey Gladkov <[email protected]>

Author: legionus

features/pipeline/data/bin/pipeline-sh-functions

@@ -55,8 +55,10 @@ pipe_name()
 
 	IFS="," read -r -a arr <<<"$PIPELINE"
 
-	[ "$1" -lt "${#arr[@]}" ] ||
+	if [ "$1" -ge "${#arr[@]}" ]; then
+		eval "name=\"\""
 		return 0
+	fi
 
 	local n="$1"
 
@@ -72,8 +74,10 @@ pipe_callnum()
 
 	IFS="," read -r -a arr <<<"$PIPELINE"
 
-	[ "$1" -lt "${#arr[@]}" ] ||
+	if [ "$1" -ge "${#arr[@]}" ]; then
+		eval "callnum=\"\""
 		return 0
+	fi
 
 	local n="$1"
 

features/pipeline/data/lib/uevent/handlers/pipeline/500-pipeline

@@ -34,6 +34,11 @@ handler_step()
 	pipe_name "$pipenum"
 	pipe_callnum "$pipenum"
 
+	if [ -z "${name-}" ] || [ -z "${callnum-}" ]; then
+		message "step #$pipenum: unable to get name. stopping..."
+		return 0
+	fi
+
 	exe="$handlerdir/$name"
 
 	if [ ! -x "$exe" ]; then