Linux系统调用time（）在出错时返回（（time_t）-14）

The man page man 2 time says:

男子页面男子2次说:

SYNOPSIS
       #include <time.h>
       time_t time(time_t *t);

RETURN VALUE
       On success, the value of time in seconds since  the  Epoch  is  returned.   On  error,
       ((time_t) -1) is returned, and errno is set appropriately.

ERRORS
       EFAULT t points outside your accessible address space.
SY