At Wed, 15 Jan 2014 16:49:23 +0900, Hitoshi Mitake wrote: > > At Wed, 15 Jan 2014 11:13:50 +0800, > Liu Yuan wrote: > > > > On Tue, Jan 14, 2014 at 05:46:26PM +0900, Hitoshi Mitake wrote: > > > It seems that current method of detecting sheep's death from logger > > > process sometimes fails. The SIGHUP is caught as a request of log > > > rotation. > > > > > > The problem comes from that SIGHUP is used for both of log rotation > > > request and death detection, and getppid() somestimes returns value > > > not equal to 1 when SIGHUP which is caused by the death rises. > > > > why not == 1 if sheep dies? I think we need to find the root cause instead of > > a workaround. > > I don't know why. It would be a timing problem. So I employed a > certainly usable way. The behavior of getppid() in the above case would be out of scope of POSIX standard. At least I couldn't find any information about them. So I think we should employ a certain way. Thanks, Hitoshi |