nroff - emulate nroff command with groff
nroff [ -CchipStUv ]
  [ -dcs ] [ -Mdir ]
  [ -mname ] [ -nnum ]
  [ -olist ] [ -rcn ]
  [ -Tname ]
  [ file ... ]
The nroff script emulates the nroff command using groff. Only
  ascii, latin1, utf8, and cp1047 are valid
  arguments for the -T option, selecting the output encoding emitted by
  grotty, groff's TTY output device. If an invalid or no -T option
  is given, nroff checks the current locale to select a default output
  device. It first tries the locale program, then the environment
  variables LC_ALL, LC_CTYPE, and LANG, and finally the
  LESSCHARSET environment variable.
The -h and -c options are equivalent to
    grotty's options -h (using tabs in the output) and -c
    (using the old output scheme instead of SGR escape sequences). The
    -d, -C, -i, -M, -m, -n, -o,
    and -r options have the effect described in troff(1). In
    addition, nroff silently ignores the options -e, -q,
    and -s (which are not implemented in troff). Options -p
    (pic), -t (tbl), -S (safer), and -U (unsafe) are passed
    to groff. -v shows the version number.
  - GROFF_BIN_PATH
- A colon separated list of directories in which to search for the
      groff executable before searching in PATH. If unset, `/usr/bin' is
      used.
This shell script is basically intended for use with man(1), so warnings
  are suppressed. nroff-style character definitions (in the file tty-char.tmac)
  are also loaded to emulate unrepresentable glyphs.
groff(1), troff(1), grotty(1)