fusefrontend: print file hexdump on header error

This should help debugging https://github.com/rfjakob/gocryptfs/issues/363 ,
but does no harm in normal operation as it only prints ciphertext to the log.
This commit is contained in:
Jakob Unterwurzacher 2019-10-06 19:36:04 +02:00
parent b3c88f573f
commit 43265940fa

View File

@ -4,6 +4,7 @@ package fusefrontend
import (
@ -158,7 +159,12 @@ func (f *File) doRead(dst []byte, off uint64, length uint64) ([]byte, fuse.Statu
// Empty file
return nil, fuse.OK
tlog.Warn.Printf("doRead %d: corrupt header: %v", f.qIno.Ino, err)
buf := make([]byte, 100)
n, _ := f.fd.ReadAt(buf, 0)
buf = buf[:n]
hexdump := hex.EncodeToString(buf)
tlog.Warn.Printf("doRead %d: corrupt header: %v\nFile hexdump (%d bytes): %s",
f.qIno.Ino, err, n, hexdump)
return nil, fuse.EIO
// Save into the file table