gistfile1.txt

[progressIndicator startAnimation:nil];
    dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_LOW, 0), ^{
        NSTask *task = [[NSTask alloc] init];    
        NSArray *arguments = [NSArray arrayWithObjects:@"-l", @"rvm", @"info", rubyName, @"ruby,homes,binaries,environment", nil];
        NSPipe *pipe = [NSPipe pipe];
        NSFileHandle *file = [pipe fileHandleForReading];

        [task setStandardOutput: pipe];
        [task setArguments: arguments];    
        [task setLaunchPath:@"/bin/bash"];
        [task launch];
        [task waitUntilExit];
        
        NSData *data = [file readDataToEndOfFile];        
        NSString *response = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        
        dispatch_async(dispatch_get_main_queue(), ^{
            [infoBox setString:response];
            
            [progressIndicator stopAnimation:nil];
            [progressIndicator setHidden:YES];
		});
        [response release];
	});