python 设置方法超时
#!/usr/bin/python #-*-coding:utf-8-*- import os,time,signal,platform,subprocess class TimeoutError(Exception): pass def run_command(cmd, timeout=60): is_linux = platform.system() == 'Linux' p = subprocess.Popen(cmd, stderr=subprocess.STDOUT, stdout=subprocess.PIPE, shell=True, preexec_fn=os.setsid if is_linux else None) t_beginning = time.time() seconds_passed = 0 while True: if p.poll() is not None: break seconds_passed = time.time() - t_beginning if timeout and seconds_passed > timeout: if is_linux: os.killpg(p.pid, signal.SIGTERM) else: p.terminate() raise TimeoutError(cmd, timeout) time.sleep(0.1) return p.stdout.read() if __name__ == '__main__': cmd = 'ping www.google.com timeout = 10 try: result = run_command(cmd, timeout) except TimeoutError: print 'excute command=<%s> timeout after %i' %(cmd,timeout) else: print = 'other error'
