Hi Andrea, On Thu, Jan 29, 2015 at 2:38 AM, Andrea Faulds <a...@ajf.me> wrote:
> Error handlers are global anyway, so this is useless (or dangerous) for > libraries. I suggest library/framework developers *not* to use user defined error handler. It's better to leave error handler for application developers. I strongly suggest application developers to use user defined error handler to catch unexpected problems. If app codes are written not to raise errors under normal operations (which I strongly recommend to do so), errors are sign of system problems. e.g. Subsystem is down, misconfiguration, crackers are attacking system, etc. In case of attack, admins would like to know which account is causing the problem. Error message like "Warning: failed to write /etc/passwd" is less useful than "Warning: failed to write /etc/passwd. User: yohgaki". User defined error handler is for error handling customization, letting user customize message makes sense. Thomas, If there are many people concerns to change error message, how about append user error message to original error message when it's changed? It's a hacky behavior to me, though. Regards, -- Yasuo Ohgaki yohg...@ohgaki.net
