Date: Fri, 6 Dec 2013 07:50:55 -0500 From: Rich Felker <dalias@...ifal.cx> To: musl@...ts.openwall.com Subject: Re: [PATCHv2] Add support for leap seconds in zoneinfo files On Fri, Dec 06, 2013 at 10:37:56AM +0000, Laurent Bercot wrote: > > >The reason I asked is that it means, if you're using TAI-10, you have > >to have matching zoneinfo files for the daylight time transitions to > >work correctly. This really complicates the matter of having POSIX/TAI > >and TZ be separate... > > Yes, people using TAI-10 should also be using right/ timezones instead of > posix/ ones. That's why TZ as a test is appealing: it ensures consistency. > But at that level it's entirely the admin's responsibility to have > consistent configuration: leap-second-conscious admins won't mind doing > some extra work to have a setting that pleases them. The problem with this approach is that an individual user may unset $TZ or set it to a POSIX-syntax timezone such as "UTC" on a system where the system clock is using TAI-10. Users generally expect this to work, and their expectation is justified. Valid scripts might even use TZ=UTC as part of their functionality. Rich
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