106 lines
3.8 KiB
Groff
106 lines
3.8 KiB
Groff
.\" Copyright (c) 1980, 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)colcrt.1 8.1 (Berkeley) 6/30/93
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.\"
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.TH COLCRT "1" "September 2011" "util-linux" "User Commands"
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.SH NAME
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colcrt \- filter nroff output for CRT previewing
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.SH SYNOPSIS
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.B colcrt
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[options]
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.RI [ file ...]
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.SH DESCRIPTION
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.B colcrt
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provides virtual half-line and reverse line feed sequences for terminals
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without such capability, and on which overstriking is destructive.
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Half-line characters and underlining (changed to dashing `\-') are placed on
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new lines in between the normal output lines.
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.SH OPTIONS
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.TP
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\fB\-\fR, \fB\-\-no\-underlining\fR
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Suppress all underlining. This option is especially useful for previewing
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.I allboxed
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tables from
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.BR tbl (1).
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.TP
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\fB\-2\fR, \fB\-\-half\-lines\fR
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Causes all half-lines to be printed, effectively double spacing the output.
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Normally, a minimal space output format is used which will suppress empty
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lines. The program never suppresses two consecutive empty lines, however.
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The
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.B \-2
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option is useful for sending output to the line printer when the output
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contains superscripts and subscripts which would otherwise be invisible.
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.TP
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\fB\-V\fR, \fB\-\-version\fR
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Display version information and exit.
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.TP
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\fB\-h\fR, \fB\-\-help\fR
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Display help text and exit.
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.SH EXAMPLES
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A typical use of
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.B colcrt
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would be:
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.PP
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.RS
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.B tbl exum2.n \&| nroff \-ms \&| colcrt \- \&| more
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.RE
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.SH SEE ALSO
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.BR col (1),
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.BR more (1),
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.BR nroff (1),
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.BR troff (1),
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.BR ul (1)
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.SH BUGS
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Should fold underlines onto blanks even with the
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.B '\-'
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option so that a true underline character would show.
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.PP
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Can't back up more than 102 lines.
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.PP
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General overstriking is lost; as a special case '|' overstruck with '\-' or
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underline becomes '+'.
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.PP
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Lines are trimmed to 132 characters.
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.PP
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Some provision should be made for processing superscripts and subscripts in
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documents which are already double-spaced.
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.SH HISTORY
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The
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.B colcrt
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command appeared in 3.0BSD.
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.SH AVAILABILITY
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The colcrt command is part of the util-linux package and is available from
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.UR https://\:www.kernel.org\:/pub\:/linux\:/utils\:/util-linux/
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Linux Kernel Archive
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.UE .
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