37     parser.add_argument("--output", help="A file to redirect output to")
45 def log(output, msg):  argument
46     if output:
47         output.write(msg + "\n")
48         output.flush()
64     if args.output:
65         output = open(args.output, "w")  variable
67         output = None  variable
92     log(output, "QEMU CMD: %s" % (cmd))
115     log(output, "GDB CMD: %s" % (gdb_cmd))
121     result = subprocess.call(gdb_cmd, shell=True, stdout=output, stderr=stderr,
129         log(output, "GDB crashed? (%d, %d) SKIPPING" % (result, result - 128))
135         log(output, "GDB never connected? Killed guest")