Usage

Taken from --help option on 2010-02-10 (from 02b56de57f015db289558bf001b6a4f07c06ae0a). See source code or execute with the —help option for up-to-date usage.

  Takes character data as input and rotates characters a
  number of places. Can be used for rot13, rot47, and rot<N>.

    rot { -h | --help }
    rot [ -a | --argv | -F<file> | --file=<file> ]
            [ -d | --decypher ] [ -C | --13 | --47 | -N<numPlaces>
                | --num-places=<numPlaces> ]
            [ -R<range> | --range=<range> ... ]

    -a
    --argv                       Take input from anonymous arguments
                                 instead of stdin.

    -C
    --13                         Rot13 mode. Same as -N13.

    --47                         Rot47 mode. Same as -N47 -R217E.

    -d
    --decypher                   Rotate places backwards instead of
                                 forwards.

    -F<file>
    --file=<file>                Specify a file as input instead of
                                 stdin. stdin can also be specified
                                 with a dash (-). For a file named -,
                                 qualify it with a path
                                 (i.e., "./-").

    -h
    --help                       Print this message and exit.

    -N<numPlaces>
    --num-places=<numPlaces>     Specify the number of places to rotate
                                 alphabetic characters.

    -R<range>
    --range=<range>              Specify the range of character codes that
                                 is rotated. Expected is a 4 digit hex
                                 number. The first two digits specify the
                                 beginning of the range and the last two
                                 digits specify the end. The default
                                 behavior, ASCII alphabet characters only,
                                 has two ranges: 415A and 617A.