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Re: "grep '\]'" warnings suggest a Gnulib DFA patch
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From: |
Bruno Haible |
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Subject: |
Re: "grep '\]'" warnings suggest a Gnulib DFA patch |
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Date: |
Sat, 04 Jun 2022 05:02:04 +0200 |
Paul Eggert wrote:
> While testing, I discovered that master-branch grep's bootstrap script
> contained a regular expression with '\]' that master-branch grep now
> warns about. I fixed this portability bug in 'bootstrap' ...
Similarly, '\}' is undefined in EREs [1]. We probably also have a number of
occurrences of that...
In lib/regex-quote.c we have
/* Characters that are special in an ERE. */
static const char ere_special[] = "$^.*[\\+?{}()|";
That should probably read
static const char ere_special[] = "$^.*[\\+?{()|";
Bruno
[1]
https://pubs.opengroup.org/onlinepubs/9699919799.2018edition/basedefs/V1_chap09.html
definition of SPEC_CHAR