diff options
| -rw-r--r-- | sys/src/9/port/devproc.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/src/9/port/devproc.c b/sys/src/9/port/devproc.c index 11a04bb55..2207a627a 100644 --- a/sys/src/9/port/devproc.c +++ b/sys/src/9/port/devproc.c @@ -1136,16 +1136,21 @@ procwrite(Chan *c, void *va, long n, vlong off) error("note not posted"); break; case Qnoteid: + if(p->kp) + error(Eperm); id = atoi(a); + if(id <= 0) + error(Ebadarg); if(id == p->pid) { p->noteid = id; break; } t = proctab(0); for(et = t+conf.nproc; t < et; t++) { - if(t->state == Dead) + if(t->state == Dead || t->kp) continue; if(id == t->noteid) { + nonone(t); if(strcmp(p->user, t->user) != 0) error(Eperm); p->noteid = id; |