fix spurious kproc ppid

newproc() didnt zero parentpid and kproc() didnt set it, so
kprocs ended up with random parent pid. this is harmless as
kprocs have no up->parent but it gives confusing results in
pstree(1).

now we zero parentpid in newproc(), and set it in sysrfork()
unless RFNOWAIT has been set.

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/src/9/port/proc.c b/sys/src/9/port/proc.c
index 3abc16080..06bdf474e 100644
--- a/sys/src/9/port/proc.c
+++ b/sys/src/9/port/proc.c
@@ -644,6 +644,7 @@ newproc(void)
 	p->nargs = 0;
 	p->setargs = 0;
 	memset(p->seg, 0, sizeof p->seg);
+	p->parentpid = 0;
 	p->noteid = pidalloc(p);
 	if(p->kstack == 0)
 		p->kstack = smalloc(KSTACK);