GNU bug report logs -
#20638
BUG: standard & extended RE's don't find NUL's :-(
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Reported by: "L. A. Walsh" <gnu <at> tlinx.org>
Date: Sun, 24 May 2015 00:06:02 UTC
Severity: normal
Tags: notabug
Done: Paul Eggert <eggert <at> cs.ucla.edu>
Bug is archived. No further changes may be made.
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Paul Eggert wrote:
> Linda Walsh wrote:
>
>> Perhaps you want to tell me where the documentation on the
>> standard and/or extended RE's is that you use?
>
> We're talking about grep, so the relevant documentation is the grep
> manual, not the awk manual or other random stuff you might find on the
> Internet. Type 'info grep'. Or if you're in Emacs, type 'C-h i m
> grep RET'.
----
From the coreutils-5.97 info page:
Backslash escapes
A backslash followed by a character not listed below causes an
error message.
`\a'
Control-G.
`\b'
Control-H.
`\f'
Control-L.
`\n'
Control-J.
`\r'
Control-M.
`\t'
Control-I.
`\v'
Control-K.
`\OOO'
The character with the value given by OOO, which is 1 to 3
octal digits,
`\\'
A backslash.
----
It didn't have 'hex' back then. But you've broken backward compatibility.
That would normally be a regression. You like to think that I wear a
tinfoil hat -- but I just have a good memory for how grep used to operate.
Maybe you should do some memory strengthening exercises (though I admit my
memory isn't what it always was, it was in this case).
Should I file this as a 2nd bug, that grep broke backward compat?
It *used* to be compatible with 'awk's regex, which is why it is the
first entry in the "See also".
>
> Whether you do or not, they're irrelevant to this discussion and to be
> honest that tinfoil-hat stuff isn't helping your case.
----
no tinfoil hat -- just a good memory, something you might find useful to
work on! ;-)
-linda
This bug report was last modified 9 years and 363 days ago.
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