dd命令在nodejs中的调用

io.js

// from http://stackoverflow.com/questions/36934749/how-to-get-the-output-of-a-spawned-child-process-in-node-js

var spawn = require('child_process').spawn;
// Create a child process
var child = spawn('dd', ['if=/dev/zero','of=/tmp/test1.img','bs=100m','count=1','conv=noerror,sync']);

child.stdout.on('data',
    function(data) {
        console.log('ls command output: ' + data);
    });
child.stderr.on('data', function(data) {
    //throw errors
    console.log('stderr: ' + data);
});

child.on('close', function(code) {
    console.log('child process exited with code ' + code);
});