Messages in this thread | | | Subject | Re: New kernel interface for sys_tz and timewarp? | From | Paul Eggert <> | Date | Tue, 13 Aug 2019 10:49:03 -0700 |
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Linus Torvalds wrote: > I assume/think that glibc uses (a) environment > variables and (b) a filesystem-set default (per-user file with a > system-wide default? I don't know what people do). glibc relies on the TZ environment variable, with a system-wide default specified in /etc/localtime or suchlike (there is no per-user default). glibc ignores the kernel's 'struct timezone' settings for of this, as 'struct timezone' is obsolete/vestigial and doesn't contain enough info to do proper conversions anyway.
I've been thinking of adding NetBSD's localtime_rz etc. functions to glibc. These functions let user programs specify the time zone for each conversion between time_t and local time, and simplify and/or speed up applications dealing with many requests coming from different time zones. These functions also ignore 'struct timezone'.
There's no need to put any of this stuff into the kernel.
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