1 // +build linux freebsd solaris
11 // Size walks a directory tree and returns its total size in bytes.
12 func Size(dir string) (size int64, err error) {
13 data := make(map[uint64]struct{})
14 err = filepath.Walk(dir, func(d string, fileInfo os.FileInfo, err error) error {
16 // if dir does not exist, Size() returns the error.
17 // if dir/x disappeared while walking, Size() ignores dir/x.
18 if os.IsNotExist(err) && d != dir {
24 // Ignore directory sizes
30 if fileInfo.IsDir() || s == 0 {
34 // Check inode to handle hard links correctly
35 inode := fileInfo.Sys().(*syscall.Stat_t).Ino
36 // inode is not a uint64 on all platforms. Cast it to avoid issues.
37 if _, exists := data[uint64(inode)]; exists {
40 // inode is not a uint64 on all platforms. Cast it to avoid issues.
41 data[uint64(inode)] = struct{}{}