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 [-F] [-p] [-x constant] 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: -F Indicates that special is a file system image, rather than a de- vice name. special will be accessed `as-is', without requiring that it is a raw character device and without attempting to read a disklabel. -p Print the current inode generation numbers; the filesystem is not modified. -x constant Exclusive-or the given constant with the random number used in the generation process. fsirand exits zero on success, non-zero on failure. If fsirand receives a SIGINFO signal, statistics on the amount of work completed and estimated completion time (in minutes:seconds) will be written to the standard error output.
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 1.6 November 16, 2001 1
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