opendarwin man page for ul

UL(1)							    BSD General Commands Manual 						     UL(1)

NAME
     ul -- do underlining

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

DESCRIPTION
     The ul utility reads the named files (or standard input if none are given) and translates occurrences of underscores to the sequence which
     indicates underlining for the terminal in use, as specified by the environment variable TERM.  The file /etc/termcap 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 terminal can overstrike, or handles underlining automatically, ul degenerates 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 appropriate dashes `-'; this is useful when you want to look at the underlin-
	     ing 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 termcap(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
	   environ(7)).

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

BUGS
     The nroff(1) command 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.

BSD
								   June 6, 1993 							       BSD