fsirand(8) - NetBSD Manual Pages

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FSIRAND(8)              NetBSD System Manager's Manual              FSIRAND(8)


NAME

     fsirand - install random inode generation numbers in a filesystem


SYNOPSIS

     fsirand [-x constant] [-p] special


DESCRIPTION

     fsirand writes random inode generation numbers for all the inodes on de-
     vice special.  These random numbers make the NFS filehandles less pre-
     dictable, increasing security of exported filesystems.

     fsirand should be run on a clean and unmounted filesystem.

     The options are as follows:

     -x constant
             Exclusive-or the given constant with the random number used in
             the generation process.

     -p      Print the current inode generation numbers; the filesystem is not
             modified.

     fsirand exits zero on success, non-zero on failure.


SEE ALSO

     fsck_ffs(8), newfs(8)


SECURITY CONSIDERATIONS

     The current implementation does not use a good random number generator,
     so the randomization can be predicted.

NetBSD 1.5.2                     March 7, 1997                               1