ul(1)
NAME
ul --- do underlining
SYNOPSIS
ul [-i] [-t terminal] [file ...]
DESCRIPTION
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 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. During the translation some other
special characters also get translated. E.g. TAB gets expanded to
spaces.
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.
-t terminal
Overrides the terminal type specified in the environment with
terminal.
ENVIRONMENT
The LANG, LC_ALL, LC_CTYPE and TERM environment variables affect the
execution of ul as described in environ(7).
EXIT STATUS
The ul utility exits 0 on success, and >0 if an error occurs.
SEE ALSO
colcrt(1), man(1), nroff(1)
HISTORY
The ul command appeared in 3.0BSD.
BUGS
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.
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