.\" Copyright (c) 1980, 1991, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)ul.1 8.1 (Berkeley) 6/6/93 .\" $FreeBSD: src/usr.bin/ul/ul.1,v 1.18 2005/05/21 09:55:09 ru Exp $ .\" .Dd August 4, 2004 .Dt UL 1 .Os .Sh NAME .Nm ul .Nd do underlining .Sh SYNOPSIS .Nm .Op Fl i .Op Fl t Ar terminal .Op Ar .Sh DESCRIPTION The .Nm 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 .Ev TERM . The file .Pa /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, .Nm degenerates to .Xr cat 1 . If the terminal cannot underline, underlining is ignored. .Pp The following options are available: .Bl -tag -width Ds .It Fl i Underlining is indicated by a separate line containing appropriate dashes `\-'; this is useful when you want to look at the underlining which is present in an .Xr nroff 1 output stream on a crt-terminal. .It Fl t Ar terminal Overrides the terminal type specified in the environment with .Ar terminal . .El .Sh ENVIRONMENT The .Ev LANG , LC_ALL , LC_CTYPE and .Ev TERM environment variables affect the execution of .Nm as described in .Xr environ 7 . .Sh EXIT STATUS .Ex -std .Sh SEE ALSO .Xr colcrt 1 , .Xr man 1 , .Xr nroff 1 .Sh HISTORY The .Nm command appeared in .Bx 3.0 . .Sh BUGS The .Xr 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.