util-linux
September 2011
bsdmainutils
collection of more utilities from FreeBSD
util-linux
Miscellaneous system utilities for Linux
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
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 subscripts 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
