From: Alexander Achenbach <xela@slit.de>
Date: Fri, 20 Apr 2007 02:42:06 +0000 (+1000)
Subject: Protect errno inside signal handler.
X-Git-Tag: portmap_6.0~23
X-Git-Url: http://git.neil.brown.name/?a=commitdiff_plain;h=6c00ba075f7bc90ced9b544b34023cd3c96d35a6;p=portmap.git

Protect errno inside signal handler.

From: Alexander Achenbach <xela@slit.de>

If a signal handler modifies errno at random times,
other code can be badly confused.  So in 'reap', save
and restore it.

(From debian)
---

diff --git a/portmap.c b/portmap.c
index cdf1658..c3c72b9 100644
--- a/portmap.c
+++ b/portmap.c
@@ -673,5 +673,7 @@ static void callit(struct svc_req *rqstp, SVCXPRT *xprt)
 
 static void reap(int ignore)
 {
+	int save_errno = errno;
 	while (wait3((int *)NULL, WNOHANG, (struct rusage *)NULL) > 0);
+	errno = save_errno;
 }