DragonFly On-Line Manual Pages

RDIGEST(1)             DragonFly General Commands Manual            RDIGEST(1)

NAME
     rdigest - calculate message digests of files and directories

SYNOPSIS
     rdigest [-x directory] algorithm [file ...]

DESCRIPTION
     The rdigest utility calculates message digests of files, directories, or,
     if no file is specified, standard input.  The -x option can be used as
     many times as required to indicate directories not to be included in a
     directory's hash.  This allows you to skip, eg, CVS subdirectories in a
     given tree, which can have relatively volatile contents not pertinent to
     the hash.

     The list of possible algorithms is:

     md5     the md5(3) algorithm will be used.

     rmd160  the rmd160(3) algorithm will be used.

     sha1    the sha1(3) algorithm will be used.

     sha256  the sha256 algorithm will be used.

     sha384  the sha384 algorithm will be used.

     sha512  the sha512 algorithm will be used.

     tiger   the tiger algorithm will be used.

     whirlpool
             the whirlpool algorithm will be used.

     The rdigest utility is a simple wrapper for the various different
     algorithm implementations, which are located in the standard C library,
     and was designed to be scalable as new message digest algorithms are
     developed.  The checksum for a directory is implemented as the hash over
     a list of one or two hashes for each of the items in the tree.

     *   For a file, the string "f " along with the path make up the data for
         one hash, and the contents of the file is used for the second hash.

     *   For a symbolic link, the string "l " along with the path to the
         symbolic link make up the data for one hash, and the target of the
         symbolic link is used for the second hash.

     *   For a directory, the string "d " along with the path make up the data
         for one hash.  There is no second hash for a directory.

     The rdigest utility exits 0 on success, and >0 if an error occurs.

SEE ALSO
     cksum(1), digest(1), md5(3), rmd160(3), sha1(3)

HISTORY
     The rdigest utility first appeared in NetBSD 2.0.

AUTHORS
     The digest(1) utility was written by Alistair G. Crooks <agc@netbsd.org>.
     rdigest was implemented by Andrew Brown <atatat@netbsd.org> as a patch to
     digest(1) to add recursive capabilities.

DragonFly 6.5-DEVELOPMENT       March 31, 2005       DragonFly 6.5-DEVELOPMENT