editor.js

var fs = require('fs');
var child_process = require('child_process');
var spawn = child_process.spawn;

function openEditor(file) {
    var cp = spawn(process.env.EDITOR, [file], {
        customFds: [
            process.stdin,
            process.stdout,
            process.stderr
        ]
    });
    cp.on('exit', function() {
        console.log('editor ended');
        var content = fs.readFileSync(file, 'utf8');
        console.log(content);
    });

}

child_process.exec('mktemp', function(err, stdout, stderr) {
    if(err) {
        console.log(err);
        return;
    }
    // remove the \n
    openEditor(stdout.substr(0, stdout.length-1));
})