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package syscallcompat
import (
"golang.org/x/sys/unix"
"github.com/rfjakob/gocryptfs/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
}
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