Dunno if this is a known fact or not, but for me it was interesting news.
Calling tzset() before chroot() is not useful in glibc. Because while glibc caches the /etc/localtime values to avoid the need to re-read it on each use, it also *resets* the cached values back to defaults if it doesn't find /etc/localtime on the next use. This is why /etc/localtime is needed in chroot, or else you'll always have logging in UTC from chrooted postfix. This is not as widely reported problem as it could've been, because many modern system logging solutions (rsyslogd, systemd-journald) basically ignore timestamps in the received messages and always add current system timestamp anyway, effectively making all the attempts to include timestamps in clients completely useless. However, some messages which include timestamps internally, are off - like logging from anvil for example (cf "Date/Time String in American Format" thread on postfix-users). FWIW. /mjt _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
