cryptfs problem.

Hello

I am trying to use sfs toolkit to develop  a cryptgraphic file system.

i begin with the cryptfs source code and it compiles fun, but i don't know 

how to set it up, i have searched the maillist and found some guides as follow:

http://diswww.mit.edu/snafu.fooworld.org/sfs/172

   * As root, run cryptfsd

   * As yourself, create a directory somewhere on an NFS-mounted of
     SFS-mounted file system.

   * Run "cmount /nfs/or/sfs/directory blah"

   * Type a password

   * "cd /cfs/blah" - any files you create there will be encrypted on
     disk with the password.

   * To remove the encrypted directory, type "rm /cfs/blah".

   * The files will be unaccessible until you re-run cmount and give
     it the same password.


 i did  like these:

[root@localhost] # mount nfserver:/nfsroot /ttt  

[root@localhost] # mkdir /ttt/luohui

[root@localhost] # cd /usr/local/src/cryptfs-0.0

[root@localhost] # ./cryptfsd

[root@localhost] # ./cmount /ttt/luohui lh   

passphrase:**

cmount : fatal: cryptfs: Input/output error

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please give me a hand, Thanks!
luohui




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