From a6c8a8e6d461e63686572d0489a7f71dc554ecd7 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Mon, 26 Sep 2005 23:01:00 +0000
Subject: [PATCH] Include unistd.h, for dup2. (futimens): Fix typo:
 HAVE_FUTIMESAT was misspelled in an #if. (futimens) [! HAVE_FUTIMESAT]: If
 !file, set errno before returning -1.

---
 lib/utimens.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/lib/utimens.c b/lib/utimens.c
index b60ec879a3..7f88f2fa96 100644
--- a/lib/utimens.c
+++ b/lib/utimens.c
@@ -26,6 +26,7 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <unistd.h>
 
 #if HAVE_UTIME_H
 # include <utime.h>
@@ -113,11 +114,24 @@ futimens (int fd ATTRIBUTE_UNUSED,
 # endif
 #endif
 
-#if ! HAVE_FUTIMES_AT
+#if ! HAVE_FUTIMESAT
 
   if (!file)
     {
+# if ! (HAVE_WORKING_UTIMES && HAVE_FUTIMES)
       errno = ENOSYS;
+# endif
+
+      /* Prefer EBADF to ENOSYS if both error numbers apply.  */
+      if (errno == ENOSYS)
+	{
+	  int fd2 = dup (fd);
+	  int dup_errno = errno;
+	  if (0 <= fd2)
+	    close (fd2);
+	  errno = (fd2 < 0 && dup_errno == EBADF ? EBADF : ENOSYS);
+	}
+
       return -1;
     }
 
-- 
2.47.3