UL (1)
ul
do underlining
SYNOPSIS
ul
Fl i
Fl t Ar terminal
Ar name Ar ...
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
terminfo
database 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:
-tag -width Ds
Fl 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
output stream on a crt-terminal.
Fl t Ar terminal
Overrides the terminal type specified in the environment with
terminal .
ENVIRONMENT
The following environment variable is used:
-tag -width TERM
Ev 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
setenv 1 ) .
SEE ALSO
BUGS
Nroff
usually outputs a series of backspaces and underlines intermixed
with the text to indicate underlining. No attempt is made to optimize
the backward motion.
HISTORY
The
command appeared in
3.0 .
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