cmd.py 文件源码

def t4():
    pretty = '%s t4' % __file__
    print(pretty)

    pid, fd = ave.cmd.run_bg('echo hello')
    poller  = select.poll()
    poller.register(fd, select.POLLIN)
    events  = poller.poll(1000) # milliseconds
    tmp     = ''
    for e in events:
        if not (e[1] & select.POLLIN):
            print('FAIL %s: unexpected poll event: %d' % (pretty, e[1]))
            os.kill(pid, signal.SIGKILL)
        tmp += os.read(fd, 1024)
    if not tmp.startswith('hello'):
        print('FAIL %s: wrong result: "%s"' % (pretty, tmp))

    os.kill(pid, signal.SIGKILL)
    os.waitpid(pid, 0)
    return True

# check that return value from executed program is correct