colcrt - filter nroff output for CRT previewing
colcrt [options] [file...]
COLCRT(1) User Commands COLCRT(1)
NAME
colcrt - filter nroff output for CRT previewing
SYNOPSIS
colcrt [options] [file...]
DESCRIPTION
colcrt provides virtual half-line and reverse line feed sequences for
terminals without such capability, and on which overstriking is
destructive. Half-line characters and underlining (changed to dashing
`-') are placed on new lines in between the normal output lines.
OPTIONS
-, --no-underlining
Suppress all underlining. This option is especially useful for
previewing allboxed tables from tbl(1).
-2, --half-lines
Causes all half-lines to be printed, effectively double spacing
the output. Normally, a minimal space output format is used
which will suppress empty lines. The program never suppresses
two consecutive empty lines, however. The -2 option is useful
for sending output to the line printer when the output contains
superscripts and subscripts which would otherwise be invisible.
-V, --version
Display version information and exit.
-h, --help
Display help text and exit.
EXAMPLES
A typical use of colcrt would be:
tbl exum2.n | nroff -ms | colcrt - | more
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+---------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+---------------------+
|Availability | text/text-utilities |
+---------------+---------------------+
|Stability | Uncommitted |
+---------------+---------------------+
SEE ALSO
nroff(1), troff(1), col(1), more(1), ul(1)
BUGS
Should fold underlines onto blanks even with the '-' option so that a
true underline character would show.
Can't back up more than 102 lines.
General overstriking is lost; as a special case '|' overstruck with '-'
or underline becomes '+'.
Lines are trimmed to 132 characters.
Some provision should be made for processing superscripts and sub-
scripts in documents which are already double-spaced.
HISTORY
The colcrt command appeared in 3.0BSD.
AVAILABILITY
The colcrt command is part of the util-linux package and is available
from Linux Kernel Archive <ftp://ftp.kernel.org/pub/linux/utils/util-
linux/>.
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://www.ker-
nel.org/pub/linux/utils/util-linux/v2.29/util-linux-2.29.tar.xz.
Further information about this software can be found on the open source
community website at https://www.kernel.org/pub/linux/utils/util-linux.
util-linux September 2011 COLCRT(1)