Node.js can't get output of spawned process

Question

This code get output of spawned process. What is wrong? node version is v0.10.22

var spawn = require('child_process').spawn;
var what = 'java';
var spawned = spawn(what,  ['-version']);

console.log('starting `'+what+' -version`');

spawned.stdout.setEncoding('utf8');
spawned.stdout.on('data', function (data) {
    console.log(data);
});

spawned.on('close', function (code) {
    console.log('process exit code ' + code);
});

var whendone = function() {
    console.log('done');
};
setTimeout(whendone,5000);

As you can see I even added some timeout to wait for a launched process to finish.

Alexey Ten · Accepted Answer · 2014-01-23 07:58:12Z

2

java -version writes to stderr.

answered Jan 23, 2014 at 7:58

Alexey Ten

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1 Comment

Paul Verest Over a year ago

Yes, and as for node, it needs --version otherwise enters REPL. Those were example I tried.

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