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OpenDarwin 7.2.1 - man page for ul (opendarwin section 1)

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

     ul -- do underlining

     ul [-i] [-t terminal] [name ...]

     The ul 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 TERM.  The file /etc/termcap 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 out-
	     put stream on a crt-terminal.

     -t 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 environ(7)).

     colcrt(1), man(1), nroff(1)

     The 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.

     The ul command appeared in 3.0BSD.

BSD					   June 6, 1993 				      BSD
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