Re: kqueue EVFILT_PROC and child process pid
Re: kqueue EVFILT_PROC and child process pid
- Subject: Re: kqueue EVFILT_PROC and child process pid
- From: Dave Keck <email@hidden>
- Date: Sun, 11 Oct 2009 10:01:01 -1000
> You cannot watch for all processes, only processes you created. After you
> fork, you can add a kqueue to watch for the new process' death, in lieu of
> waitpid() or a SIGCHLD signal. You cannot however sit there, watching for
> any random process' death. Mac OS X has no such mechanism, AFAIK.
kevents are perfectly capable of monitoring another, unrelated
process. It's become quite a hobby of mine, actually. :)
As far as getting the the new child's PID, I don't think it's possible
using the kevent APIs from userland. (sys/event.h mentions "lower bits
contain the PID of the child", but I think this is kernel-only.)
Of course you could always iterate over the process list checking each
process' parent PID... there's probably a better way, though.
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