Description Yuri Victorovich 2020-10-16 03:24:49 UTC

In the child process I have these lines:

> int signum = SIGKILL;
> if (::procctl(P_PID, 0, PROC_PDEATHSIG_CTL, &signum) == -1)
>     exit(1);

Parent launches this process, it loops, and then the parent exits.

The child process stays despite the above lines.

I expect it to receive SIGKILL and die once the parent exists, as per procctl(2):
>      PROC_PDEATHSIG_CTL   Request the delivery of a signal when the parent of
>                           the calling process exits.  idtype must be P_PID and
>                           id must be the either caller's pid or zero, with no
>                           difference in effect.  The value is cleared for
>                           child processes and when executing set-user-ID or
>                           set-group-ID binaries.  arg must point to a value of
>                           type int indicating the signal that should be
>                           delivered to the caller.  Use zero to cancel a
>                           previously requested signal delivery.