| 1 | //go:build !windows && !plan9 |
| 2 | |
| 3 | package fileutil |
| 4 | |
| 5 | import ( |
| 6 | "fmt" |
| 7 | "os" |
| 8 | "syscall" |
| 9 | ) |
| 10 | |
| 11 | // DirectoryIdentity remains stable across rename and changes on replacement. |
| 12 | func DirectoryIdentity(path string) (string, error) { |
| 13 | info, err := os.Lstat(path) |
| 14 | if err != nil { |
| 15 | return "", err |
| 16 | } |
| 17 | if !info.IsDir() || info.Mode()&os.ModeSymlink != 0 { |
| 18 | return "", fmt.Errorf("not a directory") |
| 19 | } |
| 20 | stat, ok := info.Sys().(*syscall.Stat_t) |
| 21 | if !ok { |
| 22 | return "", fmt.Errorf("directory identity unavailable") |
| 23 | } |
| 24 | return fmt.Sprintf("%x:%x", stat.Dev, stat.Ino), nil |
| 25 | } |
| 26 |