[fix] Fixed pgrep returning multiple process IDs #157

Fixes #157

Author: daniel-santos

openwisp-monitoring/files/monitoring.agent

@@ -109,7 +109,7 @@ save_data() {
 				-p daemon.info
 		fi
 		# get process id of the process sending data
-		pid=$(pgrep -f "openwisp-monitoring.*--mode send")
+		pid=$(pgrep -P 1 -f "openwisp-monitoring.*--mode send")
 		kill -SIGUSR1 "$pid"
 		sleep "$INTERVAL"
 	done
@@ -210,7 +210,7 @@ send_data() {
 								-t openwisp-monitoring \
 								-p daemon.err
 							# get process id of the process collecting data
-							pid=$(pgrep -f "openwisp-monitoring.*--mode collect")
+							pid=$(pgrep -P 1 -f "openwisp-monitoring.*--mode collect")
 							kill -SIGKILL "$pid"
 							exit 2
 						fi