From 20b319a6d47d029941507a8db8b5a2a67b40cd23 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Fri, 9 Mar 2007 02:41:51 +0000
Subject: [PATCH] Preserve errno.

---
 lib/fseterr.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/fseterr.c b/lib/fseterr.c
index 5ff8ba7e7..3f876155b 100644
--- a/lib/fseterr.c
+++ b/lib/fseterr.c
@@ -20,6 +20,8 @@
 /* Specification.  */
 #include "fseterr.h"
 
+#include <errno.h>
+
 void
 fseterr (FILE *fp)
 {
@@ -35,9 +37,11 @@ fseterr (FILE *fp)
 #else                               /* unknown  */
   /* Portable fallback, based on an idea by Rich Felker.
      Wow! 6 system calls for something that is just a bit operation!  */
+  int saved_errno;
   int fd;
   int fd2;
 
+  saved_errno = errno;
   fflush (fp);
   fd = fileno (fp);
   fd2 = dup (fd);
@@ -51,5 +55,6 @@ fseterr (FILE *fp)
 	abort ();
       close (fd2);
     }
+  errno = saved_errno;
 #endif
 }
-- 
2.11.0