#!/usr/bin/env python3
import sys
import os
import subprocess
import time
import signal


qemu_args = []
gdb_args  = []
cur_program = ''


def run_process(args):
    p = subprocess.Popen(args,
            bufsize=1,
            shell=True,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE)

    while True:
        retcode = p.poll()
        line = p.stdout.read(1)
        yield line
        if retcode is not None:
            break


for arg in sys.argv[1:]:
    if arg == '--qemu':
        cur_program = 'qemu'
        continue
    elif arg == '--gdb':
        cur_program = 'gdb'
        continue

    if cur_program == 'qemu':
        qemu_args += [arg]
    elif cur_program == 'gdb':
        gdb_args += [arg]
    else:
        print('No program specified')
        exit(-1)

env = os.environ.copy()
signal.signal(signal.SIGINT, signal.SIG_IGN)
qemu = subprocess.Popen(qemu_args,
        env=env,
        start_new_session=True,
        restore_signals=False)
time.sleep(1)

if qemu.poll() is not None:
    print('Failed to start QEMU')
    exit(-1)

subprocess.run(gdb_args,
        env=env,
        stdout=sys.stdout,
        stdin=sys.stdin,
        stderr=sys.stderr)
qemu.kill()