1 files changed, 14 insertions, 0 deletions
diff --git a/klm/util/mmap.cc b/klm/util/mmap.cc
index 2db35b56..e0d2570b 100644
--- a/klm/util/mmap.cc
+++ b/klm/util/mmap.cc
@@ -171,6 +171,20 @@ void *MapZeroedWrite(int fd, std::size_t size) {
   return MapOrThrow(size, true, kFileFlags, false, fd, 0);
 }
 
+namespace {
+
+int CreateOrThrow(const char *name) {
+  int ret;
+#if defined(_WIN32) || defined(_WIN64)
+  UTIL_THROW_IF(-1 == (ret = _open(name, _O_CREAT | _O_TRUNC | _O_RDWR, _S_IREAD | _S_IWRITE)), ErrnoException, "while creating " << name);
+#else
+  UTIL_THROW_IF(-1 == (ret = open(name, O_CREAT | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)), ErrnoException, "while creating " << name);
+#endif
+  return ret;
+}
+
+} // namespace
+
 void *MapZeroedWrite(const char *name, std::size_t size, scoped_fd &file) {
   file.reset(CreateOrThrow(name));
   try {