ShellWindow.py 文件源码

def spawn(prog, args):
    p2cread, p2cwrite = os.pipe()
    c2pread, c2pwrite = os.pipe()
    pid = os.fork()
    if pid == 0:
        # Child
        for i in 0, 1, 2:
            try:
                os.close(i)
            except os.error:
                pass
        if os.dup(p2cread) <> 0:
            sys.stderr.write('popen2: bad read dup\n')
        if os.dup(c2pwrite) <> 1:
            sys.stderr.write('popen2: bad write dup\n')
        if os.dup(c2pwrite) <> 2:
            sys.stderr.write('popen2: bad write dup\n')
        os.closerange(3, MAXFD)
        try:
            os.execvp(prog, args)
        finally:
            sys.stderr.write('execvp failed\n')
            os._exit(1)
    os.close(p2cread)
    os.close(c2pwrite)
    return pid, c2pread, p2cwrite