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];
});