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Top Forums Shell Programming and Scripting Dynamically changing environment variable Post 302960094 by cjcox on Tuesday 10th of November 2015 02:47:31 PM
Old 11-10-2015
Linux, like most *ix doesn't pass the symlink data through something that can evaluate a variable expression.

I think OSX might support this though and I know that Apollo OS's did (and likely HP-UX still has some support for this). As a former Apollo user you could create a symlink with a variable as part of the link name. In fact, you could could point your entire /usr space to run off somebody else's machine by merely changing and environment variable. It was also how they allowed you to easily switch shell flavors.


It's not that Oracle didn't go totally brain dead on how they did things, it's just that they don't want to change to become more modern. Oracle "stuff" like this has been around since before most people on this forum were probably born.

Good question, but the problem isn't lack of features in the shell or OS, the problem is Oracle....
 

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Session::Oracle(3)					User Contributed Perl Documentation					Session::Oracle(3)

NAME
Apache::Session::Oracle - An implementation of Apache::Session SYNOPSIS
use Apache::Session::Oracle; #if you want Apache::Session to open new DB handles: tie %hash, 'Apache::Session::Oracle', $id, { DataSource => 'dbi:Oracle:sessions', UserName => $db_user, Password => $db_pass, Commit => 1 }; #or, if your handles are already opened: tie %hash, 'Apache::Session::Oracle', $id, { Handle => $dbh, Commit => 1 }; DESCRIPTION
This module is an implementation of Apache::Session. It uses the Oracle backing store and no locking. See the example, and the documentation for Apache::Session::Store::Oracle for more details. USAGE
The special Apache::Session argument for this module is Commit. You MUST provide the Commit argument, which instructs this module to either commit the transaction when it is finished, or to simply do nothing. This feature is provided so that this module will not have adverse interactions with your local transaction policy, nor your local database handle caching policy. The argument is mandatory in order to make you think about this problem. This module also respects the LongReadLen argument, which specifies the maximum size of the session object. If not specified, the default maximum is 8 KB. AUTHOR
This module was written by Jeffrey William Baker <jwbaker@acm.org>. SEE ALSO
Apache::Session::File, Apache::Session::Flex, Apache::Session::DB_File, Apache::Session::Postgres, Apache::Session perl v5.12.1 2007-09-28 Session::Oracle(3)
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