Python:进程运行的时间

Question

我想做这样的事情:

try:
    pid = int(file(lock_file, "r").read())
    print "%s exists with pid: %s" % (lock_file, pid)
    if not check_pid(pid):
        print "%s not running. Phantom lock file? Continuing anyways" % pid
    elif wall_time(pid) > 60 * 5:
        print "%s has been running for more than 5 minutes. Killing it" % pid
        os.kill(pid)
    else:
        print "Exiting"
        sys.exit()
except IOError:
    pass

lock = file(lock_file, "w")
lock.write("%s" % os.getpid())
lock.close()

如何实现 wall_time？我必须从 /proc 读取还是有更好的方法？

Answer 1

或许您可以查看锁定文件的创建时间。这不能保证是正确的，但在大多数情况下都是正确的(而且弄错的后果很小)。