awk gsub problem

Lee ler762@gmail.com
Sat Sep 18 09:21:00 GMT 2010


On 9/16/10, Corinna Vinschen wrote:
> On Sep 15 18:30, Lee wrote:
>> I don't know if this is just a problem with the cygwin version of awk,
>> me misunderstanding something or what, but it looks like gsub isn't
>> working correctly in awk:
>> $ sh /tmp/test.awk
>> s= ::0::  should = ::S0::
>>
>> $ cat /tmp/test.awk
>> awk '
>> BEGIN {
>>   s="Serial0"
>>   gsub("[a-z]","",s)
>>   printf("s= ::%s::  should = ::S0::\n", s)
>>   exit
>> } '
>>
>>
>> I also tried it with IGNORECASE=0 and with "awk --traditional" - same
>> results.
>>
>> $ which awk
>> /usr/bin/awk
>>
>> $ awk --version
>> GNU Awk 3.1.8
>
> Works fine for me:
>
>   $ uname -a
>   CYGWIN_NT-6.1 vmbert7 1.7.7(0.230/5/3) 2010-08-31 09:58 i686 Cygwin
>   $ gawk --version
>   GNU Awk 3.1.8
>   Copyright (C) 1989, 1991-2010 Free Software Foundation.
>   [...]
>   $ sh //calimero/corinna/test.awk
>   s= ::S0::  should = ::S0::
>   $

Thanks for the reply.  If it works for you, doesn't work on my home or
work computer & upgrading doesn't fix it ... it's probably something I
did.  Which it was - I had this bit in my c:\cygwin\cygwin.bat file:
@rem set LANG envar for proper display
@rem ref: http://cygwin.com/cygwin-ug-net/setup-locale.html
set LANG=en_US.UTF-8

Comment out the 'set LANG=" and gsub works fine:
$ echo $LANG
C.UTF-8

$ sh /tmp/test.awk
s= ::S0::  should = ::S0::

$ export LANG=en_US.UTF-8

$ sh /tmp/test.awk
s= ::0::  should = ::S0::

So awk gsub works for me again - thank you!

Just out of curiosity, why would setting LANG to en_US break
case-sensitivity in gsub?

Regards,
Lee

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