grog − guess options for groff command grog [ −option ... ] [ ] grog reads files and guesses which of the options and are required for printing and prints the groff command including those options on the standard output. A filename of − is taken to refer to the standard input. If no files are specified the standard input will be read. Any specified options will be included in the printed command. No space is allowed between options and their arguments. The only options recognized are −C (which is also passed on) to enable compatibility mode, and −v to print the version number. For example, paper.ms‘‘grog−Tdvi will guess the appropriate command to print paper.ms and then run it after adding the −Tdvi option.