FW: timezone code - re-entrancy issue
lennox at cs.columbia.edu
lennox at cs.columbia.edu
Wed Jan 14 23:49:10 UTC 2009
On Thursday, January 15 2009, "Robert Elz" wrote to "John Dlugosz, tz at lecserver.nci.nih.gov" saying:
> No, tm_zone (which I mistakenly called tm_tzname last time) is the
> "proper" way to get the abbreviation associated with a time_t
> (after a call to localtime() of course). That one is perfectly safe
> (just call localtime_r() if you need it).
Actually, this isn't true -- tm_zone isn't safe if the value of the "TZ"
environment variable is changed. (This is true even in single-threaded
code, in fact.)
--
Jonathan Lennox
lennox at cs.columbia.edu
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