From e9228802a977c5de4f37de259912585f0b97d791 Mon Sep 17 00:00:00 2001
From: Theo de Raadt <deraadt@cvs.openbsd.org>
Date: Fri, 3 Jun 2011 06:52:38 +0000
Subject: protect errno from damage in the signal handler ok otto

---
 usr.bin/bc/bc.y | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/usr.bin/bc/bc.y b/usr.bin/bc/bc.y
index b1ee4e467df..cd27e1720af 100644
--- a/usr.bin/bc/bc.y
+++ b/usr.bin/bc/bc.y
@@ -1,5 +1,5 @@
 %{
-/*	$OpenBSD: bc.y,v 1.36 2011/06/03 06:10:31 otto Exp $	*/
+/*	$OpenBSD: bc.y,v 1.37 2011/06/03 06:52:37 deraadt Exp $	*/
 
 /*
  * Copyright (c) 2003, Otto Moerbeek <otto@drijf.net>
@@ -1058,7 +1058,7 @@ void
 sigchld(int signo)
 {
 	pid_t pid;
-	int status;
+	int status, save_errno = errno;
 
 	for (;;) {
 		pid = waitpid(dc, &status, WCONTINUED);
@@ -1072,6 +1072,7 @@ sigchld(int signo)
 		else
 			break;
 	}
+	errno = save_errno;
 }
 
 static const char *
-- 
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