1.\" Copyright (c) 1980, 1991 Regents of the University of California. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)ul.1 6.3 (Berkeley) 4/23/91 33.\" 34.Dd April 23, 1991 35.Dt UL 1 36.Os BSD 4 37.Sh NAME 38.Nm ul 39.Nd do underlining 40.Sh SYNOPSIS 41.Nm ul 42.Op Fl i 43.Op Fl t Ar terminal 44.Op Ar name Ar ... 45.Sh DESCRIPTION 46.Nm Ul 47reads the named files (or standard input if none are given) 48and translates occurrences of underscores to the sequence 49which indicates underlining for the terminal in use, as specified 50by the environment variable 51.Ev TERM . 52The file 53.Pa /etc/termcap 54is read to determine the appropriate sequences for underlining. 55If the terminal is incapable of underlining, but is capable of 56a standout mode then that is used instead. 57If the terminal can overstrike, 58or handles underlining automatically, 59.Nm ul 60degenerates to 61.Xr cat 1 . 62If the terminal cannot underline, underlining is ignored. 63.Pp 64The following options are available: 65.Bl -tag -width Ds 66.It Fl i 67Underlining is indicated by a separate line containing appropriate 68dashes `\-'; this is useful when you want to look at the underlining 69which is present in an 70.Xr nroff 71output stream on a crt-terminal. 72.It Fl t Ar terminal 73Overrides the terminal type specified in the environment with 74.Ar terminal . 75.El 76.Sh ENVIRONMENT 77The following environment variable is used: 78.Bl -tag -width TERM 79.It Ev TERM 80The 81.Ev TERM 82variable is used to relate a tty device 83with its device capability description (see 84.Xr termcap 5 ) . 85.Ev TERM 86is set at login time, either by the default terminal type 87specified in 88.Pa /etc/ttys 89or as set during the login process by the user in their 90.Pa login 91file (see 92.Xr setenv 1 ) . 93.El 94.Sh SEE ALSO 95.Xr man 1 , 96.Xr nroff 1 , 97.Xr colcrt 1 98.Sh BUGS 99.Xr Nroff 100usually outputs a series of backspaces and underlines intermixed 101with the text to indicate underlining. No attempt is made to optimize 102the backward motion. 103.Sh HISTORY 104The 105.Nm 106command appeared in 107.Bx 3.0 . 108