ul |
[-i ] [-t
terminal] [name
...] |
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.
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
).
- /usr/share/misc/terminfo
- File containing terminal descriptions.
The ul
command appeared in
3.0BSD.
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.