terminal] [file ...]
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
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,
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:
- 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.
- Overrides the terminal type specified in the environment with
variables affect the execution of
ul as described in
ul utility exits 0 on success,
and >0 if an error occurs.
ul command appeared in
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.