shell.py 文件源码

def ignore_signals():
    if platform.system() != 'Windows':
        # ??ctrl-z/c??
        signal.signal(signal.SIGTSTP, signal.SIG_IGN)
    signal.signal(signal.SIGINT, signal.SIG_IGN)
# signal.SIGTSTP ?????????????? Ctrl-Z ????? Unix ?????
# signal.SIGINT ?????????????? Ctrl-C ???
# signal.SIG_IGN ?????????