From: Eli Zaretskii <eliz@gnu.org>
Date: Mon, 14 Aug 2017 16:31:12 +0000 (+0300)
Subject: Implement renameat_noreplace for MS-Windows
X-Git-Tag: emacs-26.0.90~463
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=5ba4c7d16b800864fa14b8a981e33f6aa6fa94d6;p=emacs.git

Implement renameat_noreplace for MS-Windows

* src/sysdep.c (renameat_noreplace) [WINDOWSNT]: Implement minimal
emulation for MS-Windows.  (Bug#27986)
---

diff --git a/src/sysdep.c b/src/sysdep.c
index 9eb733221e4..35f499c1853 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -2694,6 +2694,10 @@ renameat_noreplace (int srcfd, char const *src, int dstfd, char const *dst)
 #if defined SYS_renameat2 && defined RENAME_NOREPLACE
   return syscall (SYS_renameat2, srcfd, src, dstfd, dst, RENAME_NOREPLACE);
 #else
+#ifdef WINDOWSNT
+  if (srcfd == AT_FDCWD && dstfd == AT_FDCWD)
+    return sys_rename_replace (src, dst, 0);
+#endif
   errno = ENOSYS;
   return -1;
 #endif