NAME
ul —
do underlining
SYNOPSIS
ul |
[-i]
[-t
terminal]
[name
...] |
DESCRIPTION
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
/usr/share/misc/terminfo 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.
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 following environment variable is used:
-
-
TERM
- The
TERM
variable is used to relate
a tty device with its device capability description (see
terminfo(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).
FILES
- /usr/share/misc/terminfo
- File containing terminal descriptions.
SEE ALSO
colcrt(1),
man(1),
nroff(1),
terminfo(3),
terminfo(5)
HISTORY
The
ul command appeared in
3.0BSD.
BUGS
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.