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UL(1) BSD General Commands Manual UL(1)
ul -- do underlining
ul [-i] [-t terminal] [name ...]
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 speci-
fied by the environment variable TERM. The file /usr/share/misc/terminfo is read to deter-
mine the appropriate sequences for underlining. If the terminal is incapable of underlin-
ing, but is capable of a standout mode then that is used instead. If the terminal can over-
strike, 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 underlining which is present in an nroff(1)
output stream on a crt-terminal.
Overrides the terminal type specified in the environment with terminal.
The following environment variable is used:
TERM The TERM variable is used to relate a tty device with its device capability descrip-
tion (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).
colcrt(1), man(1), nroff(1)
The ul command appeared in 3.0BSD.
nroff(1) usually outputs a series of backspaces and underlines intermixed with the text to
indicate underlining. No attempt is made to optimize the backward motion.
BSD September 29, 2009 BSD
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