[llvm] r302263 - If posix_fallocate returns EOPNOTSUPP, fallback to ftruncate.

[Joerg Sonnenberger via llvm-commits]

Author: joerg
Date: Fri May  5 12:55:58 2017
New Revision: 302263

URL: http://llvm.org/viewvc/llvm-project?rev=302263&view=rev
Log:
If posix_fallocate returns EOPNOTSUPP, fallback to ftruncate.
This can happen at least on NetBSD.

Modified:
    llvm/trunk/lib/Support/Unix/Path.inc

Modified: llvm/trunk/lib/Support/Unix/Path.inc
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Support/Unix/Path.inc?rev=302263&r1=302262&r2=302263&view=diff
==============================================================================
--- llvm/trunk/lib/Support/Unix/Path.inc (original)
+++ llvm/trunk/lib/Support/Unix/Path.inc Fri May  5 12:55:58 2017
@@ -421,14 +421,15 @@ std::error_code resize_file(int FD, uint
 #if defined(HAVE_POSIX_FALLOCATE)
   // If we have posix_fallocate use it. Unlike ftruncate it always allocates
   // space, so we get an error if the disk is full.
-  if (int Err = ::posix_fallocate(FD, 0, Size))
-    return std::error_code(Err, std::generic_category());
-#else
+  if (int Err = ::posix_fallocate(FD, 0, Size)) {
+    if (Err != EOPNOTSUPP)
+      return std::error_code(Err, std::generic_category());
+  }
+#endif
   // Use ftruncate as a fallback. It may or may not allocate space. At least on
   // OS X with HFS+ it does.
   if (::ftruncate(FD, Size) == -1)
     return std::error_code(errno, std::generic_category());
-#endif
 
   return std::error_code();
 }