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echo "first\n"; sleep(1); echo "second\n"; sleep(1); echo "third\n";

- (void)awakeFromNib {
    NSTask *task = [[NSTask alloc] init];
    [task setLaunchPath: @"/usr/bin/php"];
    NSArray *arguments;
    arguments = [NSArray arrayWithObjects: @"-r", @"echo \"first\n\"; sleep(1); echo \"second\n\"; sleep(1); echo \"third\n\";", nil];
    [task setArguments: arguments];
    NSPipe *p = [NSPipe pipe];
    [task setStandardOutput:p];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(taskExited:) name:NSTaskDidTerminateNotification object:task];
    [task launch];
- (void)taskExited:(NSNotification *)notif {
    NSTask *task = [notif object];
    NSData *data = [[[task standardOutput] fileHandleForReading] readDataToEndOfFile];
    NSString *str = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
    NSLog(@"%@",str);
}

2011-08-03 20:45:19.474 MyApp[3737:903] first
second
third

- (void)awakeFromNib {
    NSTask *task = [[NSTask alloc] init];
    [task setLaunchPath: @"/usr/bin/php"];
    NSArray *arguments;
    arguments = [NSArray arrayWithObjects: @"-r", @"echo \"first\n\"; sleep(1); echo \"second\n\"; sleep(1); echo \"third\n\";", nil];
    [task setArguments: arguments];
    NSPipe *p = [NSPipe pipe];
    [task setStandardOutput:p];
    NSFileHandle *fh = [p fileHandleForReading];
    [fh waitForDataInBackgroundAndNotify];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receivedData:) name:NSFileHandleDataAvailableNotification object:fh];
    [task launch];
- (void)receivedData:(NSNotification *)notif {
    NSFileHandle *fh = [notif object];
    NSData *data = [fh availableData];
    if (data.length > 0) { // if data is found, re-register for more data (and print)
        [fh waitForDataInBackgroundAndNotify];
        NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"%@" ,str);
}

override func awakeFromNib() {
    // Setup the task
    let task = NSTask()
    task.launchPath = "/usr/bin/php"
    task.arguments = ["-r", "echo \"first\n\"; sleep(1); echo \"second\n\"; sleep(1); echo \"third\n\";"]
    // Pipe the standard out to an NSPipe, and set it to notify us when it gets data
    let pipe = NSPipe()
    task.standardOutput = pipe
    let fh = pipe.fileHandleForReading
    fh.waitForDataInBackgroundAndNotify()
    // Set up the observer function
    let notificationCenter = NSNotificationCenter.defaultCenter()
    notificationCenter.addObserver(self, selector: "receivedData:", name: NSFileHandleDataAvailableNotification, object: nil)
    // You can also set a function to fire after the task terminates
    task.terminationHandler = {task -> Void in
           // Handle the task ending here
    task.launch()
func receivedData(notif : NSNotification) {
    // Unpack the FileHandle from the notification
    let fh:NSFileHandle = notif.object as NSFileHandle
    // Get the data from the FileHandle
    let data = fh.availableData
    // Only deal with the data if it actually exists
    if data.length > 1 {
    // Since we just got the notification from fh, we must tell it to notify us again when it gets more data

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