colcrt

filter nroff output for CRT previewing

see also : col - more - nroff - troff - ul

Synopsis

colcrt [-] [-2] [file ...]

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examples

A typical use of colcrt would be

tbl exum2.n | nroff -ms | colcrt - | more

source

            
  splitting_command="man $manpage | colcrt - |
  perl helpfiles"



  # Where:


  # - `colcrt` is a standard BSD utility
  that strip out screen control

source

            
  man 3 $1 2> /dev/null | colcrt \


  | grep "#include
  <.*>" \


  | sed -e 's,#include,,' -e 's,<,,'
  -e 's,>,,' -e 's,[
  ]*,,' \


  | sort | uniq


  ;;


  esac


  exit 0

description

The colcrt utility 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.

The following options are available:

Suppress all underlining. This option is especially useful for previewing allboxed tables from tbl(1).

-2

Cause 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.

environment

The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colcrt as described in environ(7).

exit status

The colcrt utility exits 0 on success, and >0 if an error occurs.

bugs

Should fold underlines onto blanks even with the ’-’ option so that a true underline character would show.

Cannot 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.

Characters that take up more than one column position may not be underlined correctly.

BSD July 31, 2004 BSD

history

The colcrt command appeared in 3.0BSD.

see also

col , more , nroff , troff , ul