UL(1) BSD Reference 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 specified by the environment variable TERM. The file /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 ter- minal can overstrike, or handles underlining automatically, ul degen- erates to cat(1). If the terminal cannot underline, underlining is ig- nored. The options are as follows: -i Underlining is indicated by a separate line containing appropri- ate 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. -t terminal Overrides the terminal type specified in the environment with terminal.
TERM 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 environ(7)).
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. MirOS BSD #10-current June 6, 1993 1
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