ul(1) - NetBSD Manual Pages

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UL(1)                   NetBSD General Commands Manual                   UL(1)


NAME

     ul -- do underlining


SYNOPSIS

     ul [-i] [-t terminal] [name ...]


DESCRIPTION

     ul reads the named files (or standard input if none are given) and trans-
     lates occurrences of underscores to the sequence which indicates under-
     lining for the terminal in use, as specified by the environment variable
     TERM.  The file /usr/share/misc/terminfo is read to determine the appro-
     priate sequences for underlining.  If the terminal is incapable of under-
     lining, 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 appropri-
             ate 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.

NetBSD 10.1                      June 23, 2016                     NetBSD 10.1