NAME
   ul - do underlining

SYNOPSIS
   ul [-i] [-t terminal] [name ...]

DESCRIPTION
   Ul reads the named files (or standard input if none are given) and trans-
   lates occurrences of underscores to the sequence which indicates under-
   lining for the terminal in use, as specified by the environment variable
   TERM. The terminfo database is read to determine the appropriate
   sequences for underlining.  If the terminal is incapable of underlining,
   but is capable of a standout mode then that is used instead. If the ter-
   minal can overstrike, or handles underlining automatically, ul degener-
   ates to cat(1). If the terminal cannot underline, underlining is
   ignored.

   The following options are available:

   -i    Underlining is indicated by a separate line containing appropri-
    ate dashes `-'; this is useful when you want to look at the
    underlining which is present in an nroff output stream on a crt-
    terminal.

   -t terminal
    Overrides the terminal type specified in the environment with
    terminal.

ENVIRONMENT
   The following environment variable is used:

   TERM The TERM variable is used to relate a tty device with its device
   capability description (see terminfo(5)). TERM is set at login
   time, either by the default terminal type specified in /etc/ttys or
   as set during the login process by the user in their login file
   (see setenv(1)).

SEE ALSO
  man(1),nroff(1),colcrt(1)

BUGS
   Nroff usually outputs a series of backspaces and underlines intermixed
   with the text to indicate underlining. No attempt is made to optimize
   the backward motion.

HISTORY
   The ul command appeared in 3.0BSD.