grog - guess options for groff command
grog [ -option ... ] [ files ... ]
grog reads files and guesses which of the groff(1) options
  -e, -man, -me, -mm, -mom, -ms,
  -mdoc, -mdoc-old, -p, -R, -g, -G,
  -s, and -t are required for printing files, 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,
  
  - `grog -Tdvi paper.ms`
will guess the appropriate command to print paper.ms and
    then run it after adding the -Tdvi option.
doctype(1), groff(1), troff(1), tbl(1),
  pic(1), eqn(1), refer(1), grn(1), grap(1),
  soelim(1)