From a207a8e3f157060bb6dcc338b895da3b44bfad85 Mon Sep 17 00:00:00 2001
From: "Tim J. Robbins" <tjr@FreeBSD.org>
Date: Thu, 19 Dec 2002 09:50:10 +0000
Subject: [PATCH] Use strerror_r() to format the error message so that
 strerror()'s static buffer does not get clobbered.

ISO/IEC 9899:1999 7.21.6.2 3:
"The implementation shall behave as if no library function calls the
strerror function."
---
 lib/libc/stdio/perror.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/libc/stdio/perror.c b/lib/libc/stdio/perror.c
index 226c1897bf8..162d49e56d1 100644
--- a/lib/libc/stdio/perror.c
+++ b/lib/libc/stdio/perror.c
@@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/uio.h>
 #include <unistd.h>
 #include <errno.h>
+#include <limits.h>
 #include <stdio.h>
 #include <string.h>
 #include "un-namespace.h"
@@ -50,6 +51,7 @@ void
 perror(s)
 	const char *s;
 {
+	char msgbuf[NL_TEXTMAX];
 	struct iovec *v;
 	struct iovec iov[4];
 
@@ -62,7 +64,8 @@ perror(s)
 		v->iov_len = 2;
 		v++;
 	}
-	v->iov_base = strerror(errno);
+	strerror_r(errno, msgbuf, sizeof(msgbuf));
+	v->iov_base = msgbuf;
 	v->iov_len = strlen(v->iov_base);
 	v++;
 	v->iov_base = "\n";