BSFILT.1
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- BSFILT(1) Minix Programmer's Manual BSFILT(1)
- NAME
- bsfilt, colcrt - a colcrt-like backspace filter
- SYNOPSIS
- bsfilt [ - ] [ -U ] [ file ... ]
- DESCRIPTION
- Bsfilt filters backspace sequences from the input file(s) (standard input
- if none) in an approximation of colcrt(1). Both the backspace and the
- character it returns to are removed, unless they form an underline
- sequence. Underline sequences are treated according to the settings of
- the - and -U options.
- OPTIONS
- - specifies that no underlining of any kind is to be propagated.
- Without this option or the -U option, bsfilt approximates
- underlining with minus signs (`-') in following lines.
- -U specifies that underlining with underscore (`_') and backspace (`b')
- character sequences is permitted.
- SEE ALSO
- cawf(1), colcrt(1) and nroff(1).
- DIAGNOSTICS
- Diagnostic messages are delivered to the standard error file.
- HISTORY
- Vic Abell of Purdue University wrote bsfilt to have a backspace filter
- for cawf(1) that is independent of licensed source code.
- BUGS
- The maximum length of a line that can be underlined with minus signs is
- fixed.
- Bsfilt does not examine the characters that are being overprinted via
- backspace operations. Thus, overprinting that is intended to form a new
- character from several different ones is ineffective and only the last
- character of the sequence is propagated - e. g., ``o^H+'', intended to
- look like a bullet, is reduced to `+'.
- Purdue University February, 1991 1