Re: [libvirt] [PATCH 4/6] Allow a timezone to be specified instead of sync to host timezone
According to Daniel P. Berrange on 3/1/2010 11:45 AM:
>> + <data type="string">
>> + <param name="pattern">[a-zA-Z0-9_\.\+\-/]+</param>
>
> Hum ... I wonder if we should not add ':' as it's used for POSIX TZ
How is it used ? I looked at /usr/share/zoneinfo and all the files
there should be matched by this regex ok without needing ':'
POSIX states that the use of ':' introduces implementation-defined extensions.
http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html
The value of TZ has one of the two forms (spaces inserted for
clarity):
:characters
or:
std offset dst offset, rule
If TZ is of the first format (that is, if the first character is a <colon>), the
characters following the <colon> are handled in an implementation-defined manner.
In other words, since "Europe/Paris" is NOT a valid timezone according to
POSIX rules, a user concerned about POSIX compliance should be allowed to
use TZ=":Europe/Paris" to still get glibc semantics of a named zone.
--
Eric Blake eblake(a)redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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