If posix_fallocate returns EOPNOTSUPP, fallback to ftruncate.

This can happen at least on NetBSD.

llvm-svn: 302263

1 files changed, 5 insertions, 4 deletions

diff --git a/llvm/lib/Support/Unix/Path.inc b/llvm/lib/Support/Unix/Path.inc
index 93f8982196b..fa28ba1b6ab 100644
--- a/llvm/lib/Support/Unix/Path.inc
+++ b/llvm/lib/Support/Unix/Path.inc
@@ -421,14 +421,15 @@ std::error_code resize_file(int FD, uint64_t Size) {
 #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();
 }