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.
