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
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:
- -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.
- -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 setenv(1)).
SEE ALSO
man(1), nroff(1),
colcrt(1)
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 ul command appeared in BSD 3.0