[libc-commits] [libc] [libc] add statvfs/fstatvfs (PR #86169)

[Nick Desaulniers via libc-commits]

================
@@ -0,0 +1,24 @@
+//===-- Linux implementation of fstatvfs ----------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/sys/statvfs/fstatvfs.h"
+#include "src/__support/common.h"
+#include "src/sys/statvfs/linux/statfs_utils.h"
+
+namespace LIBC_NAMESPACE {
+
+LLVM_LIBC_FUNCTION(int, fstatvfs, (int fd, struct statvfs *buf)) {
+  using namespace statfs_utils;
+  if (cpp::optional<LinuxStatFs> result = linux_fstatfs(fd)) {
+    *buf = statfs_to_statvfs(*result);
+    return 0;
+  }
+  return -1;
----------------
nickdesaulniers wrote:

```suggestion
  using namespace statfs_utils;
  cpp::optional<LinuxStatFs> result = linux_fstatfs(fd)
  if (result)
    *buf = statfs_to_statvfs(*result);
  return result ? 0 : -1;
```

https://github.com/llvm/llvm-project/pull/86169