deogol.pl [-cdes] [-f custom_filter] [--noise] [message_file]
The container file is read from stdin. The message is supplied as a commandline parameter (see above) and the modified container is written to stdout.
| -c,--capacity | Print the capacity of the container in bytes and exit. |
| -d,--decode | Decode a message from the container file, and write it to the message file supplied. |
| -e,--encode | [Default] Read a message from the message file supplied, and encode it in the container file. |
| -f,--filter |
If in encoding mode, run the message through custom_filter
before encoding. If in decoding mode, run the extracted message
through custom_filter after decoding.
Filters must accept input on stdin and write output to stdout, e.g. the -f option must be used with gzip and gunzip if used as a filter. The command custom_filter may be any valid UNIX command, including a sequence of piped commands; if a pipe or other character meaningful to the shell is used, custom_filter must be quoted. |
| -s,--size | Print the size of the message in bytes and exit. Note this is not necessarily this size of message file, but the size of the message after any filter has been run. |
| --noise, --random | Generate random data and fill the container with it. |