On 13 Aug 2010, at 22:32, Greg Guerin wrote: >> Process group code: >> >> // launch the task >> [task launch]; >> >> pid_t group = setsid(); >> if (group == -1) { >> NSLog(@"setsid() == -1"); >> group = getpgrp(); >> } >> if (setpgid([task processIdentifier], group) == -1) { >> NSLog(@"unable to put task into same group as self: errno = %i", >> errno); >> } > > The current process-group id is inherited across fork() and execve() - see > their respective man pages. So if you reorder the operations so setsid() > occurs before [task launch], then the child inherits automatically. > Hah! That does seem to have the desired effect.
> This doesn't mean the child can't change its own pgid/sid. And since you > mention a shell, it's not unusual for shells to do exactly that. > In my simple test (one task forks/execs to bash which forks/execs 10 background sleeps) killing the process leader has the desired cascade of terminations. Thanks and regards Jonathan Mitchell Developer Mugginsoft LLP http://www.mugginsoft.com_______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com