javascript - Run Continous Process from Node.js -

the point of server able pick webcam , stream it, along few other things have working. trying run continuous process (mjpg-streamer) within node.js server. node.js server handling serving html page has select drop down binded javascript function send command server via socket.io. drop down lets me select video0, video1, , none. however, whenever try run server refuses saying after particular block of code unreachable or code gets stuck running infinite process. how can execute without locking server? here code causes problem:

child = exec("video0.sh", function (error, stdout, stderr) { sys.print('stdout: ' + stdout); sys.print('stderr: ' + stderr); if (error !== null) {   console.log('exec error: ' + error); } 

the bash script video0.sh is:

cd mjpg-streamer/mjpg-streamer ; export ld_library_path=. ; ./mjpg_streamer -o "output_http.so -w ./www -p 8080" -i "input_uvc.so -d /dev/video0"; 

you can set infinite loop in pure shell directly

#!/usr/bin/bash  cd mjpg-streamer/mjpg-streamer ; export ld_library_path=. ; while :   ./mjpg_streamer -o "output_http.so -w ./www -p 8080" -i "input_uvc.so -d /dev/video0";   sleep 5 done