netbsd man page for ul

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

NAME
     ul -- do underlining

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

DESCRIPTION
     ul 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 /usr/share/misc/terminfo 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(1) 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 for
	   example csh(1)'s setenv).

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

HISTORY
     The ul command appeared in 3.0BSD.

BUGS
     nroff(1) usually outputs a series of backspaces and underlines intermixed with the text to indicate underlining.  No attempt is made to opti-
     mize the backward motion.

BSD
								September 29, 2009							       BSD