[lug] changing timezone of a running process

[D. Stimits]

Scott Herod wrote:

> This one should be relatively simple.  How do I inform a running process
> that the timezone has changed.  For example compile the code below then
> while it's running use timeconfig as root to set the timezone to 
> something
> else.
>
> Thanks,
>
> Scott
>
> #include
> #include
> #include
> #include
>
> int main()
> {
>     struct timeval tv;
>     struct tm time;
>
>     while ( true )
>     {
>         sleep ( 2 );
>         tzset();       // Does this reset?
>         gettimeofday( &tv, NULL );
>         localtime_r( &tv.tv_sec, &time );
>         std::cerr << "Offset " << time.tm_gmtoff << std::endl;
>     }
> }
>
I think the usual way would be to have it intercept a kill -HUP like a 
daemon, and then have it run again anything configurable. Or are you 
talking about having the program self-detect?

D. Stimits, stimits AT comcast DOT net