From: Sepherosa Ziehau <sephe@dragonflybsd.org>
Date: Fri, 23 Sep 2011 01:51:05 +0000 (+0800)
Subject: kevent(2): Set errno properly
X-Git-Tag: v2.12.0~22
X-Git-Url: https://gitweb.dragonflybsd.org/dragonfly.git/commitdiff_plain/ef7915fc4bf7204876b4aca6698fd84668676a41?hp=fd4e5f0653e4044ac5be25874d42b960bd000d9d

kevent(2): Set errno properly

If we can't deliver the registration failure information in the
changelist, then we should set the errno properly.
---

diff --git a/sys/kern/kern_event.c b/sys/kern/kern_event.c
index 0c4c30cfab..bd5ac9a3d9 100644
--- a/sys/kern/kern_event.c
+++ b/sys/kern/kern_event.c
@@ -625,7 +625,9 @@ kern_kevent(struct kqueue *kq, int nevents, int *res, void *uap,
 				kevp->data = error;
 				lres = *res;
 				kevent_copyoutfn(uap, kevp, 1, res);
-				if (lres != *res) {
+				if (*res < 0) {
+					goto done;
+				} else if (lres != *res) {
 					nevents--;
 					nerrors++;
 				}