On Thu, 16 May 1996, Carlos Carvalho wrote:
> I also found that lockchk in line 156 of rmjob.c is doing a
>
> if (kill(cur_daemon, 0) < 0) {
>
> I don't think it's right to send a signal number 0, at least it's not
> documented. Also it has no effect at all, though it returns 0.It's not in the Linux man page but it is in others (like Solaris). The 0 signal can be used to tell if the process is still valid (running). I've used it a few times. I assumed it was pretty standard. ...RickM...
