[TUHS] Literal character escapes in v7

Will Senn will.senn at gmail.com
Tue Nov 7 14:49:35 AEST 2017


On 11/6/17 10:34 PM, arnold at skeeve.com wrote:
> Will Senn <will.senn at gmail.com> wrote:
>
>> I'm not looking for code review, but the code is intended to replace the
>> tabs and backspaces with \t and \b respectively, but I haven't been able
>> to test it because I can't seem to make a backspace character appear in
>> input. In later unices, ^V followed by the backspace would work, but
>> that's not part of v7. Backspace itself is my erase character, so
>> anytime I just type it, it backspaces :).
> 	awk 'BEGIN { print "a\bc\td" ; exit }' | your-program
>
> Enjoy,
>
> Arnold
>
> P.S. The exit is needed for V7 awk, IIRC, not modern ones.

This is a good idea, but... Here's my results from just running awk for 
\t, \n, and \b:

$ awk 'BEGIN { print "a\tb" ; exit }';
a       b
$ awk 'BEGIN { print "a\nb" ; exit }'
anb
$ awk 'BEGIN { print "a\bb" ; exit }'
abb
$

Strange. It looks like it's just ignoring the backslash in the case of 
\n and \b.

Will

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