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Re: Base-Files (was Re: Unset TMP/TEMP in profile?)

On Thu, Dec 03, 2009 at 09:28:21PM +0100, Thomas Wolff wrote:
>Christopher Faylor wrote:
>> On Wed, Dec 02, 2009 at 07:21:40PM +0100, Corinna Vinschen wrote:
>>> On Dec  2 18:21, Thomas Wolff wrote:
>>>> Corinna Vinschen wrote in another thread about setting LANG:
>>>>>> ... Andy and Thomas, please work
>>>>>> out the best solution together.  It should work in sh and csh.  Then
>>>>>> post it as reply to so
>>>>>> John can put it into the base-files package.
>>>> Our worked-out proposal is as follows:
>>>> /etc/profile.d/
>>>> # if no locale variable is set, indicate terminal charset via LANG
>>>> test -z "${LC_ALL:-${LC_CTYPE:-$LANG}}" && export LANG=C.UTF-8
>>>> /etc/profile.d/lang.csh:
>>>> # if no locale variable is set, indicate terminal charset via LANG
>>>> ( test $?LC_ALL = 0 || test -z "$LC_ALL" ) && ( test $?LC_CTYPE = 0 || test -z "$LC_CTYPE" ) && ( test $?LANG = 0 || test -z "$LANG" ) && setenv LANG C.UTF-8
>>> Thanks to both of you.
>> I wasn't paying attention before, so I apologize for not commenting
>> sooner but couldn't all of the above be one test statement or at least
>> handled inside '{}' rather than '()'.  Maybe bash optimizes that away
>> but, if it doesn't, then forking subshells will be rather expensive on
>> Cygwin.
>For bash and other sh-alike shells, test is a built-in, but not for tcsh 
>- sorry I did not consider this.
>So an if statement should be used. I don't see, however, how {} would 
>help - if you mean to embed an invocation of test
>in an if expression, that doesn't help because test would still be forked.
>The expression if ( $?LC_ALL == 0 || "$LC_ALL" == "" ) on the other 

'()' starts a subshell.  '{}' doesn't.

You probably don't need either '()' or '{}' though since "test" also
understands parenthesized instructions.  So it just has to be run

I think Corinna has already demonstrated another construct for tcsh
which will give similar results.


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