bash - Why isn't stdout set after executing a child process in a node.js script that's running as a daemon? -

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this works expected if run command line (node index.js). when execute node.js (v0.10.4) script daemon init.d script stdout return value in exec callback not set. how fix this?

node.js script:

var exec = require('child_process').exec; setinterval(function() { exec('get_switch_state', function(err, stdout, stderr)  {         if(stdout == "on")         {             // something.         } }); }, 5000);

init.d script:

#!/bin/bash  node=/development/nvm/v0.10.4/bin/node server_js_file=/home/blahname/app/index.js user=root out=/home/pi/nodejs.log  case "$1" in  start)     echo "starting node: $node $server_js_file"     sudo -u $user $node $server_js_file > $out 2>$out &     ;;  stop)     killall $node     ;;  *)     echo "usage: $0 (start|stop)" esac  exit 0

i ended not using node.js exec child_process. modified init.d script above (/etc/init.d/node-app.sh) follows:

#!/bin/bash  node=/home/pi/development/nvm/v0.10.4/bin/node server_js_file=/home/pi/development/mysql_test/index.js user=pi out=/home/pi/development/mysql_test/nodejs.log  case "$1" in  start) echo "starting node: $node $server_js_file" sudo -u $user tz='pst' $node $server_js_file > $out 2>$out & ;;  stop) killall $node ;;  *) echo "usage: $0 (start|stop)" esac  exit 0

this script launches node.js app "index.js" @ boot , everthing works expected.


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