topic Re: system time call problem after DST change in Operating System - OpenVMS

system time call problem after DST change

Gregg Parmentier — Mon, 12 Mar 2007 14:50:06 GMT

I'm running VMS 7.1 and I do manual changes for CDT/CST, so I didn't think I'd have a problem with the new dates.

Turns out we have C code here (DEC C V5.7-004) that takes the raw seconds in the time filed and calls localtime to convert it to the date and time instead of just asking the system for the local time. This code is used all over the place.

Anyone know for sure if it's using the file defined by sys$localtime for rules.

I've found the source for that timezone rule file. How do I convert that the the usable format after I add the corrected rules?

Do we need to recompile everything that uses this code to get it fixed, or just restart it after I fix the rule file? I guess I'll find the answer to this last one pretty quickly if I get the rest of the stuff taken care of.

Re: system time call problem after DST change

Hein van den Heuvel — Mon, 12 Mar 2007 14:59:34 GMT

Our friend Hoff made a pretty extensive writeup under:

http://64.223.189.234/node/72

http://www.hoffmanlabs.org
--> new
[Popular Content]
--> DST

It points to the FAQ and HP sites as needed.

He also has a blog article on DST:

http://64.223.189.234/node/133

Cheers,
Hein.

Re: system time call problem after DST change

Gregg Parmentier — Mon, 12 Mar 2007 15:58:34 GMT

7.1 was enough behind the current version that it took a while to find the right reference, but running zic was the answer. And no recompiling necessary, woo hoo!