[Python-Dev] UserString

Barry Warsaw barry at python.org
Thu Feb 24 16:00:01 CET 2005

On Tue, 2005-02-22 at 19:14, Andrew McNamara wrote:
> >>     if e.errno <> errno.EEXIST:
> >>         raise
> >
> >You have a lot more faith in the errno module than I do. Are you sure
> >the same error codes work on all platforms where Python works? It's
> >also not exactly readable (except for old Unix hacks).
> On the other hand, LBYL in this context can result in race conditions
> and security vulnerabilities. "os.makedirs" is already a composite of
> many system calls, so all bets are off anyway, but for simpler operations
> that result in an atomic system call, this is important.



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