Red Hat Bugzilla – Bug 100786
DateManip needs to use zoneinfo database for source of timezones
Last modified: 2008-03-21 05:38:57 EDT
Description of problem:
Right now DateManip keeps an internal list of timezones. This list as you
might expect is incomplete. Instead of keeping an internal list it should
get its list from the zoneinfo database. This way it would agree with
RedHat on what time zones are supported.
As an example, if you set your time zone to America/Sao_Paulo, then
and then use this lib you will get a an error that causes your script
to die something like:
ERROR: Date::Manip unable to determine TimeZone.
at /usr/lib/perl5/vendor_perl/5.8.0/Date/Manip.pm line 629
Newer versions of the library actually do include other time zones
(including Sao_Paulo), but the underlying problem is not fixed.
I have talked with Sullivan Beck (firstname.lastname@example.org) the author of the
software and he is working on getting it to read the zone_info
database, but it is not complete yet.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Set timezone to Sao_Paulo with timeconfig.
2. Run script that uses DateManip's UnixDate() function.
Here is the email I got back from Sullivan Beck:
> Hi Sullivan,
> I having been using your Date::Manip program and ran into a problem
> when we deployed our software (and of yours) in Brazil. We set the time
> zone to Sao Paolo, and found that the timezones for it were not in your
> libraries internal list of timezones. Now, I downloaded the your latest
> library and it does indeed have these entries in the list. This fixes
> that problem, but I was thinking of a way by which you would not have
> to maintain an internal list.
> What I would like to see happen is at build time, a scan of the systems
> tz/zoneinfo database be done, and your internal list would be generated
> from that. I have been trying to find out how to read these files to get
> the offsets and abreviations out of them but I have not found how to yet
> (otherwise you would be receiving a patch from me (-;).
This is already in the works. I will be using the tzdata database (which
is the foundation for almost all other timezone databases). In addition,
I will probably add the ability to define additional timezone's as needed.
BTW, trying to read the files is HARD. The tzdata databases use some
fairly complicated methods to store the information, and it's very
non-trivial to convert it to something usable. The majority of entries
aren't that hard, but they had to add all kinds of special cases for the
more bizarre methods that are used in some places.
Anyway, Date::Manip 6.00 (which is coming sometime) will feature this.
--------------------------| Sullivan Beck |---------------------------
mailto:email@example.com | Senior System Programmer
http://www.cise.ufl.edu/~sbeck | University of Florida
PH : (352) 392-1057 | CISE Department
Fax: (352) 392-1220 | CSE 314E
| Gainesville, FL 32611-6120
Is this still an issue in FC4?
*** Bug 174984 has been marked as a duplicate of this bug. ***
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If this issue is still present in a current Fedora Core release, please
open a new bug with the relevant information.
Closing as CANTFIX.
This is still an issue in FC6. Reopening.
It seems to be working at least in F-9. If the problem persist please feel free
to reopen this bug.