On 2024-08-08 12:24, mark.yagnatin...@barclays.com wrote:
Re: how am I doing that ... via bash, just like the way you suggested I run
"locale" the second time:
LC_CTYPE=C.UTF-8 grep -P needle haystack.txt # just CTYPE seems to be enough,
no need for ALL
As an aside, I wouldn't mess with LC_CTYPE independently. One can get
into trouble if the LC_CTYPE locale disagrees with the others. However,
I don't think that's your problem.
Re: is_using_utf8 ... It relies on mbrtowc, which in turn relies on the current
locale.
It seems that this function should NEVER return false in a UTF-8 locale.
Correct.
But how does grep decide what the locale even is?
Presumably it must call setlocale at some point, or else it would be using the
C locale, which is surely a unibyte locale.
Correct, it calls 'setlocale (LC_ALL, "")' first thing.
is there any good way to find out what locale it actually got "resolved" to?
You could modify the source code to add a call like this:
fprintf (stderr, "grep: locale is %s\n", setlocale (LC_ALL, 0));
after the earlier call to setlocale. Or you could run 'setlocale
(LC_ALL, 0)' in a debugger.
