use statvfs(2) for disk.GetInfo on NetBSD (#10257)

pkg/disk/stat_netbsd.go

@@ -1,7 +1,7 @@
 // +build netbsd
 
 /*
- * MinIO Cloud Storage, (C) 2017 MinIO, Inc.
+ * MinIO Cloud Storage, (C) 2020 MinIO, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,7 +18,23 @@
 
 package disk
 
+import (
+	"golang.org/x/sys/unix"
+)
+
 // GetInfo returns total and free bytes available in a directory, e.g. `/`.
 func GetInfo(path string) (info Info, err error) {
-	return Info{}, nil
+	s := unix.Statvfs_t{}
+	if err = unix.Statvfs(path, &s); err != nil {
+		return Info{}, err
+	}
+	reservedBlocks := uint64(s.Bfree) - uint64(s.Bavail)
+	info = Info{
+		Total:  uint64(s.Frsize) * (uint64(s.Blocks) - reservedBlocks),
+		Free:   uint64(s.Frsize) * uint64(s.Bavail),
+		Files:  uint64(s.Files),
+		Ffree:  uint64(s.Ffree),
+		FSType: string(s.Fstypename[:]),
+	}
+	return info, nil
 }