Any reason why this may be a bad idea? I think it'd be useful
for a pwait(1)-like utility (from Solaris).
Index: lib/libc/sys/kqueue.2
===================================================================
RCS file: /home/ncvs/src/lib/libc/sys/kqueue.2,v
retrieving revision 1.44
diff -u -p -r1.44 kqueue.2
--- lib/libc/sys/kqueue.2 17 Sep 2006 21:27:34 -0000 1.44
+++ lib/libc/sys/kqueue.2 17 Nov 2006 18:50:48 -0000
@@ -364,6 +364,8 @@ The events to monitor are:
.Bl -tag -width XXNOTE_TRACKERR
.It NOTE_EXIT
The process has exited.
+The exit status will be stored in
+.Va data .
.It NOTE_FORK
The process has called
.Fn fork .
Index: sys/kern/kern_event.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/kern_event.c,v
retrieving revision 1.106
diff -u -p -r1.106 kern_event.c
--- sys/kern/kern_event.c 25 Sep 2006 01:29:48 -0000 1.106
+++ sys/kern/kern_event.c 17 Nov 2006 18:50:49 -0000
@@ -396,6 +396,7 @@ filt_proc(struct knote *kn, long hint)
if (!(kn->kn_status & KN_DETACHED))
knlist_remove_inevent(&p->p_klist, kn);
kn->kn_flags |= (EV_EOF | EV_ONESHOT);
+ kn->kn_data = kn->kn_ptr.p_proc->p_xstat;
kn->kn_ptr.p_proc = NULL;
return (1);
}
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