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ul(1) [netbsd man page]

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

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

Check Out this Related Man Page

COLCRT(1)						    BSD General Commands Manual 						 COLCRT(1)

colcrt -- filter nroff output for CRT previewing SYNOPSIS
colcrt [-] [-2] [file ...] DESCRIPTION
The colcrt utility provides virtual half-line and reverse line feed sequences for terminals without such capability, and on which overstrik- ing is destructive. Half-line characters and underlining (changed to dashing `-') are placed on new lines in between the normal output lines. The following options are available: - Suppress all underlining. This option is especially useful for previewing allboxed tables from tbl(1). -2 Cause all half-lines to be printed, effectively double spacing the output. Normally, a minimal space output format is used which will suppress empty lines. The program never suppresses two consecutive empty lines, however. The -2 option is useful for sending output to the line printer when the output contains superscripts and subscripts which would otherwise be invisible. ENVIRONMENT
The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colcrt as described in environ(7). EXIT STATUS
The colcrt utility exits 0 on success, and >0 if an error occurs. EXAMPLES
A typical use of colcrt would be tbl exum2.n | nroff -ms | colcrt - | more SEE ALSO
col(1), more(1), nroff(1), troff(1), ul(1) HISTORY
The colcrt command appeared in 3.0BSD. BUGS
Should fold underlines onto blanks even with the '-' option so that a true underline character would show. Cannot back up more than 102 lines. General overstriking is lost; as a special case '|' overstruck with '-' or underline becomes '+'. Lines are trimmed to 132 characters. Some provision should be made for processing superscripts and subscripts in documents which are already double-spaced. Characters that take up more than one column position may not be underlined correctly. BSD
July 31, 2004 BSD
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