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 https:// www.kernel.org /pub /linux /utils /util-linux/ Linux Kernel Archive .