diff options
Diffstat (limited to 'proc')
| -rw-r--r-- | proc/pgrp.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/proc/pgrp.c b/proc/pgrp.c index ad74a84d..5caedb00 100644 --- a/proc/pgrp.c +++ b/proc/pgrp.c @@ -360,10 +360,9 @@ leave_pgrp (struct proc *p) { if (ip->p_stopped) dosignal = 1; - nowait_proc_newids (ip->p_msgport, ip->p_task, - ip->p_parent->p_pid, - ip->p_pid, - 1); + if (ip->p_msgport != MACH_PORT_NULL) + nowait_proc_newids (ip->p_msgport, ip->p_task, ip->p_parent->p_pid, + ip->p_pid, 1); } if (dosignal) for (ip = pg->pg_plist; ip; ip = ip->p_gnext) @@ -379,6 +378,8 @@ void join_pgrp (struct proc *p) { struct pgrp *pg = p->p_pgrp; + struct proc *tp; + int origorphcnt; p->p_gnext = pg->pg_plist; p->p_gprevp = &pg->pg_plist; @@ -386,10 +387,20 @@ join_pgrp (struct proc *p) pg->pg_plist->p_gprevp = &p->p_gnext; pg->pg_plist = p; + origorphcnt = !!pg->pg_orphcnt; if (p->p_parent->p_pgrp != pg && p->p_parent->p_pgrp->pg_session == pg->pg_session) pg->pg_orphcnt++; - - nowait_proc_newids (p->p_msgport, p->p_task, - p->p_parent->p_pid, pg->pg_pgid, !pg->pg_orphcnt); + if (origorphcnt != !!pg->pg_orphcnt) + { + /* Tell all the processes that their status has changed */ + for (tp = pg->pg_plist; tp; tp = tp->p_gnext) + if (tp->p_msgport != MACH_PORT_NULL) + nowait_proc_newids (tp->p_msgport, tp->p_task, tp->p_parent->p_pid, + pg->pg_pgid, !pg->pg_orphcnt); + } + else if (p->p_msgport != MACH_PORT_NULL) + /* Always notify process P, because its pgrp has changed. */ + nowait_proc_newids (p->p_msgport, p->p_task, + p->p_parent->p_pid, pg->pg_pgid, !pg->pg_orphcnt); } |