TZ variable setting for denx 2.4.20

TZ variable setting for denx 2.4.20

[Robin]

Hi all,
I am trying to find a way of setting TZ environment variable with DST
support for southern hemisphere countries. Its giving a strange problem.
In southern hemisphere countries, DST starts around Oct and ends around
March. The DST time seems to be applicable from Oct until Dec31,19:00hrs.
Then it reverts back to standard time.

For northern hemisphere countries, its working perfectly.(Here DST starts
around March and ends around Oct. There is no year crossing DST period.)

I am sending the system timezone at various times..

bash> export TZ="xxx5:30yyy4:30,M10.1.1,M2.1.1"
bash> date 10010159
Mon Oct  1 01:59:00 xxx 2001
bash> date
Mon Oct  1 01:59:47 xxx 2001
bash> date
Mon Oct  1 03:00:10 yyy 2001
bash> date 12311900
Mon Dec 31 19:00:00 yyy 2001
bash> date 12311959
Mon Dec 31 18:59:00 xxx 2001 <----------- problem. It should have
reverted to xxx only in feb.

Please give me some idea for setting time zone for southern hemisphere
countries.

I am using 2.4.20 linux kernel from denx.I am running date command from
busybox version 0.6 which in is using strftime. The processor is ppc860T.

Regards,
Robin Mathew

Re: TZ variable setting for denx 2.4.20

[Wolfgang Denk]

In message <4229EDFB.2040402@india.tejasnetworks.com> you wrote:
>
> I am trying to find a way of setting TZ environment variable with DST

Your subject is misleading. Timezone handling is a user space  issue.
It has nothing to do with the kernel verison.

> I am using 2.4.20 linux kernel from denx.I am running date command from

This has nothing to do with your problems.

> busybox version 0.6 which in is using strftime. The processor is ppc860T.

BB 0.6 ? AFAICT there is no such version. Do you mean  busybox-0.60.5 ?

This is awfully old. Maybe  you  should  try  running  an  up-to-date
version  of  busybox  first?  If  this doesn;'t work, please consider
using the real GNU date  command.  You  should  understand  that  the
busybox  tools  only provide limited functionality, so fancy features
like complex timezone support may not be available.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
Status quo. Latin for "the mess we're in."

Re: TZ variable setting for denx 2.4.20

[Robin]

Thanks for your response..

I have tried with the standard linux date too. That too doesnt seem to 
consider
timezone variable that has been set. Can you give me a way for setting 
timezone
for southern hemisphere countries?? The busybox code uses strftime function.
But that does not seem to consider TZ variable...

Regards,
Robin

Wolfgang Denk wrote:

>In message <4229EDFB.2040402@india.tejasnetworks.com> you wrote:
>
>>I am trying to find a way of setting TZ environment variable with DST
>>
>
>Your subject is misleading. Timezone handling is a user space  issue.
>It has nothing to do with the kernel verison.
>
>>I am using 2.4.20 linux kernel from denx.I am running date command from
>>
>
>This has nothing to do with your problems.
>
>>busybox version 0.6 which in is using strftime. The processor is ppc860T.
>>
>
>BB 0.6 ? AFAICT there is no such version. Do you mean  busybox-0.60.5 ?
>
>This is awfully old. Maybe  you  should  try  running  an  up-to-date
>version  of  busybox  first?  If  this doesn;'t work, please consider
>using the real GNU date  command.  You  should  understand  that  the
>busybox  tools  only provide limited functionality, so fancy features
>like complex timezone support may not be available.
>
>Best regards,
>
>Wolfgang Denk
>

Re: TZ variable setting for denx 2.4.20

[Marius Groeger]

Robin,

On Thu, 6 Jan 2005, Robin wrote:

> I have tried with the standard linux date too. That too doesnt seem 
> to consider timezone variable that has been set. Can you give me a 
> way for setting timezone for southern hemisphere countries?? The 
> busybox code uses strftime function. But that does not seem to 
> consider TZ variable...

You should read up on how glibc handles all that timezone stuff:

   sh# info libc "TZ Variable"

Most notably, make sure you /etc/localtime is set up correctly. There 
is also a tool (script) called tzselect which may be helpful for you.

Note I'm not exactly an expert on this, I'm just giving pointers...

Regards,
Marius

-- 
Marius Groeger <mgroeger@sysgo.com>
SYSGO AG                      Embedded and Real-Time Software
Voice: +49 6136 9948 0                  FAX: +49 6136 9948 10
www.sysgo.com | www.elinos.com | www.osek.de | www.imerva.com

Re: TZ variable setting for denx 2.4.20

[Robin]

Hi
Thanx for your response. I am setting TZ variable as
given in the documentation.
   export TZ="xxx5:30yyy4:30,M10.1.1,M2.1.1"
Its working fine till Dec 31 23:59:59GMT. On Jan 01 00:00:00,
 its not taking DST into account at all.

Please tell me some way of setting it across an year boundary.
Thanks,
Robin


Marius Groeger wrote:

> Robin,
>
> On Thu, 6 Jan 2005, Robin wrote:
>
>> I have tried with the standard linux date too. That too doesnt seem 
>> to consider timezone variable that has been set. Can you give me a 
>> way for setting timezone for southern hemisphere countries?? The 
>> busybox code uses strftime function. But that does not seem to 
>> consider TZ variable...
>
>
> You should read up on how glibc handles all that timezone stuff:
>
>   sh# info libc "TZ Variable"
>
> Most notably, make sure you /etc/localtime is set up correctly. There 
> is also a tool (script) called tzselect which may be helpful for you.
>
> Note I'm not exactly an expert on this, I'm just giving pointers...
>
> Regards,
> Marius
>

Re: TZ variable setting for denx 2.4.20

[Tony Lee]

What's denx?
Anyway, in my embeded ppc-linux, I set it with 
/etc/TZ

echo "PST8PDT" > /etc/TZ to set it to pacific time.

Have fun.

-Tony


On Fri, 07 Jan 2005 12:58:42 +0530, Robin <robin@india.tejasnetworks.com> wrote:
> Hi
> Thanx for your response. I am setting TZ variable as
> given in the documentation.
>    export TZ="xxx5:30yyy4:30,M10.1.1,M2.1.1"
> Its working fine till Dec 31 23:59:59GMT. On Jan 01 00:00:00,
>  its not taking DST into account at all.
> 
> Please tell me some way of setting it across an year boundary.
> Thanks,
> Robin
> 
> Marius Groeger wrote:
> 
> > Robin,
> >
> > On Thu, 6 Jan 2005, Robin wrote:
> >
> >> I have tried with the standard linux date too. That too doesnt seem
> >> to consider timezone variable that has been set. Can you give me a
> >> way for setting timezone for southern hemisphere countries?? The
> >> busybox code uses strftime function. But that does not seem to
> >> consider TZ variable...
> >
> >
> > You should read up on how glibc handles all that timezone stuff:
> >
> >   sh# info libc "TZ Variable"
> >
> > Most notably, make sure you /etc/localtime is set up correctly. There
> > is also a tool (script) called tzselect which may be helpful for you.
> >
> > Note I'm not exactly an expert on this, I'm just giving pointers...
> >
> > Regards,
> > Marius
> >
> 
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> 


-- 
-Tony
Having fun with FPGA HW + ppc + Linux

Re: TZ variable setting for denx 2.4.20

[annamaya]

I am not sure what hapenned to the SPI driver that was
out there for the 8xx that I wrote a long time ago. I
know that it was working fine then. I do have a
version now that works great. I'll try and make it
available somewhere real soon. But this one's only for
the 2.4 kernel and not the 2.6 kernel.

--- Robin <robin@india.tejasnetworks.com> wrote:

> Hi all,
> I am trying to find a way of setting TZ environment
> variable with DST
> support for southern hemisphere countries. Its
> giving a strange problem.
> In southern hemisphere countries, DST starts around
> Oct and ends around
> March. The DST time seems to be applicable from Oct
> until Dec31,19:00hrs.
> Then it reverts back to standard time.
> 
> For northern hemisphere countries, its working
> perfectly.(Here DST starts
> around March and ends around Oct. There is no year
> crossing DST period.)
> 
> I am sending the system timezone at various times..
> 
> bash> export TZ="xxx5:30yyy4:30,M10.1.1,M2.1.1"
> bash> date 10010159
> Mon Oct  1 01:59:00 xxx 2001
> bash> date
> Mon Oct  1 01:59:47 xxx 2001
> bash> date
> Mon Oct  1 03:00:10 yyy 2001
> bash> date 12311900
> Mon Dec 31 19:00:00 yyy 2001
> bash> date 12311959
> Mon Dec 31 18:59:00 xxx 2001 <----------- problem.
> It should have
> reverted to xxx only in feb.
> 
> Please give me some idea for setting time zone for
> southern hemisphere
> countries.
> 
> I am using 2.4.20 linux kernel from denx.I am
> running date command from
> busybox version 0.6 which in is using strftime. The
> processor is ppc860T.
> 
> Regards,
> Robin Mathew
> 
> 
> 
> 
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded@ozlabs.org
>
https://ozlabs.org/mailman/listinfo/linuxppc-embedded
> 



		
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