package syscallcompat import ( "golang.org/x/sys/unix" "github.com/rfjakob/gocryptfs/v2/internal/tlog" ) func DetectQuirks(cipherdir string) (q uint64) { const ( // From https://github.com/rfjakob/gocryptfs/issues/585#issuecomment-887370065 FstypenameExfat = "exfat" ) var st unix.Statfs_t err := unix.Statfs(cipherdir, &st) if err != nil { tlog.Warn.Printf("DetectQuirks: Statfs on %q failed: %v", cipherdir, err) return 0 } // Convert null-terminated st.Fstypename int8 array to string var buf []byte for _, v := range st.Fstypename { if v == 0 { break } buf = append(buf, byte(v)) } fstypename := string(buf) tlog.Debug.Printf("DetectQuirks: Fstypename=%q\n", fstypename) // On MacOS ExFAT, all empty files share inode number 1: // https://github.com/rfjakob/gocryptfs/issues/585 if fstypename == FstypenameExfat { logQuirk("ExFAT detected, disabling hard links. See https://github.com/rfjakob/gocryptfs/issues/585 for why.") q |= QuirkDuplicateIno1 } return q }