On Tue, Apr 04, 2006 at 08:29:45AM -0400, Ken Murchison wrote:
> Its entirely possible that the current code is taking advantage of a
> "feature" of Linux which is not intended to be exposed to the user.
>From 'man timezone':
The tzset() function initializes the tzname variable from the TZ
environment variable. This function is automatically called by
the other time conversion functions that depend on the time
zone. In a SysV-like environment it will also set the variables
timezone (seconds West of GMT) and daylight (0 if this time zone
does not have any daylight savings time rules, non-zero if there
is a time during the year when daylight savings time applies).
[...]
CONFORMING TO
SVID 3, POSIX, 4.3BSD
NOTES
[...]
4.3BSD had a function char *timezone(zone, dst) that returned
the name of the time zone corre‐ sponding to its first argument
(minutes West of GMT). If the second argument was 0, the
standard name was used, otherwise the daylight savings time
version.
SUSv3 has the same description as Linux, so only BSDs are different.
Gabor
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Hungarian Academy of Sciences
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