how to set time zone

how to set time zone

[Ni Qingliang]

Hello All:

what is the right way to set timezone?

I have added tzdata into my image, and can find some variables in the
etc, e.g. 'TZ'.

on my archlinux, I can set TIMEZONE in the rc.conf, which is used in
rc.sysvinit (which will link the /etc/localtime using TIMEZONE).

what is the right place to locate similar setting code (e.g. link
the /etc/localtime) in the yocto?

thanks!



-- 
Yi Qingliang
niqingliang@insigma.com.cn
http://niqingliang2003.wordpress.com

Re: [OE-core] how to set time zone

[Samuel Stirtzel]

2011/10/28 Ni Qingliang <niqingliang@insigma.com.cn>:
> Hello All:
>
> what is the right way to set timezone?
>
> I have added tzdata into my image, and can find some variables in the
> etc, e.g. 'TZ'.
>
> on my archlinux, I can set TIMEZONE in the rc.conf, which is used in
> rc.sysvinit (which will link the /etc/localtime using TIMEZONE).
>
> what is the right place to locate similar setting code (e.g. link
> the /etc/localtime) in the yocto?
>
> thanks!
>
>
>
> --
> Yi Qingliang
> niqingliang@insigma.com.cn
> http://niqingliang2003.wordpress.com
>
>
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
>

Hi,

you could try the following:
http://www.rwhitby.net/blog/nslu2-linux/setting-the-openmoko-timezone.html

Well this is the first entry when using google with "openembedded time
zone", so please consider using search engines first next time.

Also this is the very same process like it is done on a desktop
computer, googling for "set time zone linux command line" gives this
result:
http://www.cyberciti.biz/faq/howto-linux-unix-change-setup-timezone-tz-variable/
Which shows more precise steps at the headline "Set timezone using
/etc/localtime configuration file [any Linux distro]".


(Sorry for cross posting, but this was carried over to the OE-Core list)

-- 
Regards
Samuel

Re: how to set time zone

[Samuel Stirtzel]

2011/10/28 Ni Qingliang <niqingliang@insigma.com.cn>:
> Hello All:
>
> what is the right way to set timezone?
>
> I have added tzdata into my image, and can find some variables in the
> etc, e.g. 'TZ'.
>
> on my archlinux, I can set TIMEZONE in the rc.conf, which is used in
> rc.sysvinit (which will link the /etc/localtime using TIMEZONE).
>
> what is the right place to locate similar setting code (e.g. link
> the /etc/localtime) in the yocto?
>
> thanks!
>
>
>
> --
> Yi Qingliang
> niqingliang@insigma.com.cn
> http://niqingliang2003.wordpress.com
>
>
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
>

Hi,

you could try the following:
http://www.rwhitby.net/blog/nslu2-linux/setting-the-openmoko-timezone.html

Well this is the first entry when using google with "openembedded time
zone", so please consider using search engines first next time.

Also this is the very same process like it is done on a desktop
computer, googling for "set time zone linux command line" gives this
result:
http://www.cyberciti.biz/faq/howto-linux-unix-change-setup-timezone-tz-variable/
Which shows more precise steps at the headline "Set timezone using
/etc/localtime configuration file [any Linux distro]".


(Sorry for cross posting, but this was carried over to the OE-Core list)

-- 
Regards
Samuel

Re: [OE-core] how to set time zone

[Ni Qingliang]

THANKS!

I still want the native support by oe-core/yocto:-). If no, I will try
by myself.

On Fri, 2011-10-28 at 14:32 +0800, Samuel Stirtzel wrote:
> 2011/10/28 Ni Qingliang <niqingliang@insigma.com.cn>:
> > Hello All:
> >
> > what is the right way to set timezone?
> >
> > I have added tzdata into my image, and can find some variables in the
> > etc, e.g. 'TZ'.
> >
> > on my archlinux, I can set TIMEZONE in the rc.conf, which is used in
> > rc.sysvinit (which will link the /etc/localtime using TIMEZONE).
> >
> > what is the right place to locate similar setting code (e.g. link
> > the /etc/localtime) in the yocto?
> >
> > thanks!
> >
> >
> >
> > --
> > Yi Qingliang
> > niqingliang@insigma.com.cn
> > http://niqingliang2003.wordpress.com
> >
> >
> >
> > _______________________________________________
> > Openembedded-core mailing list
> > Openembedded-core@lists.openembedded.org
> > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
> >
> 
> Hi,
> 
> you could try the following:
> http://www.rwhitby.net/blog/nslu2-linux/setting-the-openmoko-timezone.html
> 
> Well this is the first entry when using google with "openembedded time
> zone", so please consider using search engines first next time.
> 
> Also this is the very same process like it is done on a desktop
> computer, googling for "set time zone linux command line" gives this
> result:
> http://www.cyberciti.biz/faq/howto-linux-unix-change-setup-timezone-tz-variable/
> Which shows more precise steps at the headline "Set timezone using
> /etc/localtime configuration file [any Linux distro]".
> 
> 
> (Sorry for cross posting, but this was carried over to the OE-Core list)
> 
> --
> Regards
> Samuel

-- 
Yi Qingliang
niqingliang@insigma.com.cn
http://niqingliang2003.wordpress.com

Re: how to set time zone

[Ni Qingliang]

THANKS!

I still want the native support by oe-core/yocto:-). If no, I will try
by myself.

On Fri, 2011-10-28 at 14:32 +0800, Samuel Stirtzel wrote:
> 2011/10/28 Ni Qingliang <niqingliang@insigma.com.cn>:
> > Hello All:
> >
> > what is the right way to set timezone?
> >
> > I have added tzdata into my image, and can find some variables in the
> > etc, e.g. 'TZ'.
> >
> > on my archlinux, I can set TIMEZONE in the rc.conf, which is used in
> > rc.sysvinit (which will link the /etc/localtime using TIMEZONE).
> >
> > what is the right place to locate similar setting code (e.g. link
> > the /etc/localtime) in the yocto?
> >
> > thanks!
> >
> >
> >
> > --
> > Yi Qingliang
> > niqingliang@insigma.com.cn
> > http://niqingliang2003.wordpress.com
> >
> >
> >
> > _______________________________________________
> > Openembedded-core mailing list
> > Openembedded-core@lists.openembedded.org
> > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
> >
> 
> Hi,
> 
> you could try the following:
> http://www.rwhitby.net/blog/nslu2-linux/setting-the-openmoko-timezone.html
> 
> Well this is the first entry when using google with "openembedded time
> zone", so please consider using search engines first next time.
> 
> Also this is the very same process like it is done on a desktop
> computer, googling for "set time zone linux command line" gives this
> result:
> http://www.cyberciti.biz/faq/howto-linux-unix-change-setup-timezone-tz-variable/
> Which shows more precise steps at the headline "Set timezone using
> /etc/localtime configuration file [any Linux distro]".
> 
> 
> (Sorry for cross posting, but this was carried over to the OE-Core list)
> 
> --
> Regards
> Samuel

-- 
Yi Qingliang
niqingliang@insigma.com.cn
http://niqingliang2003.wordpress.com

Re: how to set time zone

[Andrea Adami]

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On Fri, Oct 28, 2011 at 9:05 AM, Ni Qingliang <niqingliang@insigma.com.cn>wrote:

> THANKS!
>
> I still want the native support by oe-core/yocto:-). If no, I will try
> by myself.
>
>
I've asked three or four time the oe-core crow to improve the recipe...last
one:

On Wed, Oct 19, 2011 at 12:24 AM, Joshua Lock <josh@linux.intel.com> wrote:

> Per mailing requests, here are updates to the tzdata and gst-plugins-good
> recipes.
>
> Joshua
>
> The following changes since commit
> 95d0ff5e070c690314ab87665200099a52d37ebf:
>
>  tzdata: updated SRC_URI and update to 2011k (2011-10-18 11:16:58 -0700)
>

Thanks for the tzdata fix.
Now, we have the same recipes in meta-oe with a slightly different
do_install and packaging: I'm referring to /etc/localtime and /etc/timezone:
which package do provide those in oe-core?

(We'll remove the tzdata/tzcodes from meta-oe once the recipes are matching)

Regards



Andrea

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Re: how to set time zone

[Mark Hatle]

Setting the default TZ for the image is something that should be done in a post
install script for the tzdata package or something similar.

Since the /etc/localtime is usually a copy/hardlink or symlink to the timezone
data we don't want to package it up.  Instead we want to perform the actions
that a program running on the target system itself would use to change the timezone.

So I think the easiest approach is to add a system level configuration variable
(set the default).

Then use this variable to populate the configuration file that specifies the
system timezone... and then use the post install process to check the contents
of a text file.

Alternatively do this via an initscript -- but for folks w/ read-only
filesystems I'm not sure that will work.

--Mark

On 10/28/11 3:22 AM, Andrea Adami wrote:
> On Fri, Oct 28, 2011 at 9:05 AM, Ni Qingliang <niqingliang@insigma.com.cn
> <mailto:niqingliang@insigma.com.cn>> wrote:
> 
>     THANKS!
> 
>     I still want the native support by oe-core/yocto:-). If no, I will try
>     by myself.
> 
> 
> I've asked three or four time the oe-core crow to improve the recipe...last one:
> 
> On Wed, Oct 19, 2011 at 12:24 AM, Joshua Lock <josh@linux.intel.com
> <mailto:josh@linux.intel.com>> wrote:
> 
>     Per mailing requests, here are updates to the tzdata and gst-plugins-good
>     recipes.
> 
>     Joshua
> 
>     The following changes since commit 95d0ff5e070c690314ab87665200099a52d37ebf:
> 
>      tzdata: updated SRC_URI and update to 2011k (2011-10-18 11:16:58 -0700)
> 
> 
> Thanks for the tzdata fix.
> Now, we have the same recipes in meta-oe with a slightly different do_install
> and packaging: I'm referring to /etc/localtime and /etc/timezone: which package
> do provide those in oe-core?
> 
> (We'll remove the tzdata/tzcodes from meta-oe once the recipes are matching)
> 
> Regards
> 
> 
> 
> Andrea
> 
> 
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core

Re: how to set time zone

[Saul Wold]

On 10/28/2011 10:22 AM, Andrea Adami wrote:
> On Fri, Oct 28, 2011 at 9:05 AM, Ni Qingliang
> <niqingliang@insigma.com.cn <mailto:niqingliang@insigma.com.cn>> wrote:
>
>     THANKS!
>
>     I still want the native support by oe-core/yocto:-). If no, I will try
>     by myself.
>
>
> I've asked three or four time the oe-core crow to improve the
> recipe...last one:
>
> On Wed, Oct 19, 2011 at 12:24 AM, Joshua Lock <josh@linux.intel.com
> <mailto:josh@linux.intel.com>> wrote:
>
>     Per mailing requests, here are updates to the tzdata and
>     gst-plugins-good recipes.
>
>     Joshua
>
>     The following changes since commit
>     95d0ff5e070c690314ab87665200099a52d37ebf:
>
>       tzdata: updated SRC_URI and update to 2011k (2011-10-18 11:16:58
>     -0700)
>
>
> Thanks for the tzdata fix.
> Now, we have the same recipes in meta-oe with a slightly different
> do_install and packaging: I'm referring to /etc/localtime and
> /etc/timezone: which package do provide those in oe-core?
>
> (We'll remove the tzdata/tzcodes from meta-oe once the recipes are matching)
>
I would welcome such a patch.

Thanks
	Sau!
> Regards
>
>
>
> Andrea
>
>
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core

Re: how to set time zone

[Ni Qingliang]

I'd like the 'system level configuration' solution.

the /etc/localtime/ link can be done when packaging rootfs (using the
system level configuration).

On Fri, 2011-10-28 at 22:43 +0800, Mark Hatle wrote:
> Setting the default TZ for the image is something that should be done in a post
> install script for the tzdata package or something similar.
> 
> Since the /etc/localtime is usually a copy/hardlink or symlink to the timezone
> data we don't want to package it up.  Instead we want to perform the actions
> that a program running on the target system itself would use to change the timezone.
> 
> So I think the easiest approach is to add a system level configuration variable
> (set the default).
> 
> Then use this variable to populate the configuration file that specifies the
> system timezone... and then use the post install process to check the contents
> of a text file.
> 
> Alternatively do this via an initscript -- but for folks w/ read-only
> filesystems I'm not sure that will work.
> 
> --Mark
> 
> On 10/28/11 3:22 AM, Andrea Adami wrote:
> > On Fri, Oct 28, 2011 at 9:05 AM, Ni Qingliang <niqingliang@insigma.com.cn
> > <mailto:niqingliang@insigma.com.cn>> wrote:
> >
> >     THANKS!
> >
> >     I still want the native support by oe-core/yocto:-). If no, I will try
> >     by myself.
> >
> >
> > I've asked three or four time the oe-core crow to improve the recipe...last one:
> >
> > On Wed, Oct 19, 2011 at 12:24 AM, Joshua Lock <josh@linux.intel.com
> > <mailto:josh@linux.intel.com>> wrote:
> >
> >     Per mailing requests, here are updates to the tzdata and gst-plugins-good
> >     recipes.
> >
> >     Joshua
> >
> >     The following changes since commit 95d0ff5e070c690314ab87665200099a52d37ebf:
> >
> >      tzdata: updated SRC_URI and update to 2011k (2011-10-18 11:16:58 -0700)
> >
> >
> > Thanks for the tzdata fix.
> > Now, we have the same recipes in meta-oe with a slightly different do_install
> > and packaging: I'm referring to /etc/localtime and /etc/timezone: which package
> > do provide those in oe-core?
> >
> > (We'll remove the tzdata/tzcodes from meta-oe once the recipes are matching)
> >
> > Regards
> >
> >
> >
> > Andrea
> >
> >
> > _______________________________________________
> > Openembedded-core mailing list
> > Openembedded-core@lists.openembedded.org
> > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
> 
> 
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core

-- 
Yi Qingliang
niqingliang@insigma.com.cn
http://niqingliang2003.wordpress.com

Re: how to set time zone

[Andrea Adami]

[-- Attachment #1: Type: text/plain, Size: 1818 bytes --]

On Mon, Oct 31, 2011 at 1:44 AM, Ni Qingliang <niqingliang@insigma.com.cn>wrote:

> I'd like the 'system level configuration' solution.
>
> the /etc/localtime/ link can be done when packaging rootfs (using the
> system level configuration).
>
> On Fri, 2011-10-28 at 22:43 +0800, Mark Hatle wrote:
> > Setting the default TZ for the image is something that should be done in
> a post
> > install script for the tzdata package or something similar.
> >
> > Since the /etc/localtime is usually a copy/hardlink or symlink to the
> timezone
> > data we don't want to package it up.  Instead we want to perform the
> actions
> > that a program running on the target system itself would use to change
> the timezone.
> >
> > So I think the easiest approach is to add a system level configuration
> variable
> > (set the default).
> >
> > Then use this variable to populate the configuration file that specifies
> the
> > system timezone... and then use the post install process to check the
> contents
> > of a text file.
> >
> > Alternatively do this via an initscript -- but for folks w/ read-only
> > filesystems I'm not sure that will work.
> >
> > --Mark
>
<cut>

Maybe I misunderstand "system level configuration" but in the meta-oe
recipe we have

DEFAULT_TIMEZONE ?= "Europe/London"

Maybe UTC would be better?
Note how the variable is weak thus can be overridden in local.conf.

Secondly, why do it as post-install or at image do_rootfs stage when we
have set the variable and are therefore able to provide sane defaults in
do_install?

Other points before starting to write a patch:
-why is the recipe in oe-core doing   chown -R root:root ${D}   ?

-the logic around   # libc is removing zoneinfo files from package
  Is it only eglibc?


Regards

Andrea

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Re: how to set time zone

[Mark Hatle]

On 11/2/11 12:32 PM, Andrea Adami wrote:
> On Mon, Oct 31, 2011 at 1:44 AM, Ni Qingliang <niqingliang@insigma.com.cn
> <mailto:niqingliang@insigma.com.cn>> wrote:
> 
>     I'd like the 'system level configuration' solution.
> 
>     the /etc/localtime/ link can be done when packaging rootfs (using the
>     system level configuration).
> 
>     On Fri, 2011-10-28 at 22:43 +0800, Mark Hatle wrote:
>     > Setting the default TZ for the image is something that should be done in a
>     post
>     > install script for the tzdata package or something similar.
>     >
>     > Since the /etc/localtime is usually a copy/hardlink or symlink to the timezone
>     > data we don't want to package it up.  Instead we want to perform the actions
>     > that a program running on the target system itself would use to change the
>     timezone.
>     >
>     > So I think the easiest approach is to add a system level configuration
>     variable
>     > (set the default).
>     >
>     > Then use this variable to populate the configuration file that specifies the
>     > system timezone... and then use the post install process to check the contents
>     > of a text file.
>     >
>     > Alternatively do this via an initscript -- but for folks w/ read-only
>     > filesystems I'm not sure that will work.
>     >
>     > --Mark
> 
> <cut>
> 
> Maybe I misunderstand "system level configuration" but in the meta-oe recipe we have
> 
> DEFAULT_TIMEZONE ?= "Europe/London"
> 
> Maybe UTC would be better?

To me no timezone (which is UTC) is preferable as the system designer can then
set the timezone, externally to the package(s).

> Note how the variable is weak thus can be overridden in local.conf.  
>  
> Secondly, why do it as post-install or at image do_rootfs stage when we have set
> the variable and are therefore able to provide sane defaults in do_install?

If it's done within a do_install, then the file (/etc/timezone) itself gets
placed into the package.  If it's in the package, then if/when someone upgrades
the package from a feed the timezone gets reset to the previous value.  That's a
bug IMHO.

If it's done as a post-install script, then the timezone configuration can be
evaluated and if one isn't set -- or there is no timezone file -- then we can
set it to UTC or a similar default timezone.. (the value in the DEFAULT_TIMEZONE
variable is reasonable in this approach.)

> Other points before starting to write a patch:
> -why is the recipe in oe-core doing   chown -R root:root ${D}   ?

There was an issue with the way the timezone data was extracted/constructed that
it was have all of the build system's uid/gid preserved in the copy to the final
install directory -- so when packaging incorrect usernames and groups were fed
into the process causing issues.

A simple chown -R root:root ${D} ensured that all of the timezone data was owned
by the root user (on the target).

> -the logic around   # libc is removing zoneinfo files from package
>   Is it only eglibc?

Timezone info is updated more often then the system libc.  So the zoneinfo files
are handled externally of the libc.  This allows for easier updates over time..
(This is my guess, as I'm not familiar with exactly what this comment refers to.)

> Regards
> 
> Andrea
> 
> |
> |
> 
> 
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core

Re: how to set time zone

[Ni Qingliang]

maybe we can do the link in system booting, use the variable "TZ" to
create the symlink /etc/localtime, just like archlinux.
e.g. providing one script in /etc/rcS.d/ to create the symlink.

On Thu, 2011-11-03 at 03:15 +0800, Mark Hatle wrote:
> On 11/2/11 12:32 PM, Andrea Adami wrote:
> > On Mon, Oct 31, 2011 at 1:44 AM, Ni Qingliang <niqingliang@insigma.com.cn
> > <mailto:niqingliang@insigma.com.cn>> wrote:
> >
> >     I'd like the 'system level configuration' solution.
> >
> >     the /etc/localtime/ link can be done when packaging rootfs (using the
> >     system level configuration).
> >
> >     On Fri, 2011-10-28 at 22:43 +0800, Mark Hatle wrote:
> >     > Setting the default TZ for the image is something that should be done in a
> >     post
> >     > install script for the tzdata package or something similar.
> >     >
> >     > Since the /etc/localtime is usually a copy/hardlink or symlink to the timezone
> >     > data we don't want to package it up.  Instead we want to perform the actions
> >     > that a program running on the target system itself would use to change the
> >     timezone.
> >     >
> >     > So I think the easiest approach is to add a system level configuration
> >     variable
> >     > (set the default).
> >     >
> >     > Then use this variable to populate the configuration file that specifies the
> >     > system timezone... and then use the post install process to check the contents
> >     > of a text file.
> >     >
> >     > Alternatively do this via an initscript -- but for folks w/ read-only
> >     > filesystems I'm not sure that will work.
> >     >
> >     > --Mark
> >
> > <cut>
> >
> > Maybe I misunderstand "system level configuration" but in the meta-oe recipe we have
> >
> > DEFAULT_TIMEZONE ?= "Europe/London"
> >
> > Maybe UTC would be better?
> 
> To me no timezone (which is UTC) is preferable as the system designer can then
> set the timezone, externally to the package(s).
> 
> > Note how the variable is weak thus can be overridden in local.conf.
> >
> > Secondly, why do it as post-install or at image do_rootfs stage when we have set
> > the variable and are therefore able to provide sane defaults in do_install?
> 
> If it's done within a do_install, then the file (/etc/timezone) itself gets
> placed into the package.  If it's in the package, then if/when someone upgrades
> the package from a feed the timezone gets reset to the previous value.  That's a
> bug IMHO.
> 
> If it's done as a post-install script, then the timezone configuration can be
> evaluated and if one isn't set -- or there is no timezone file -- then we can
> set it to UTC or a similar default timezone.. (the value in the DEFAULT_TIMEZONE
> variable is reasonable in this approach.)
> 
> > Other points before starting to write a patch:
> > -why is the recipe in oe-core doing   chown -R root:root ${D}   ?
> 
> There was an issue with the way the timezone data was extracted/constructed that
> it was have all of the build system's uid/gid preserved in the copy to the final
> install directory -- so when packaging incorrect usernames and groups were fed
> into the process causing issues.
> 
> A simple chown -R root:root ${D} ensured that all of the timezone data was owned
> by the root user (on the target).
> 
> > -the logic around   # libc is removing zoneinfo files from package
> >   Is it only eglibc?
> 
> Timezone info is updated more often then the system libc.  So the zoneinfo files
> are handled externally of the libc.  This allows for easier updates over time..
> (This is my guess, as I'm not familiar with exactly what this comment refers to.)
> 
> > Regards
> >
> > Andrea
> >
> > |
> > |
> >
> >
> > _______________________________________________
> > Openembedded-core mailing list
> > Openembedded-core@lists.openembedded.org
> > http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
> 
> 
> _______________________________________________
> Openembedded-core mailing list
> Openembedded-core@lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core

-- 
Yi Qingliang
niqingliang@insigma.com.cn
https://niqingliang2003.wordpress.com

Re: how to set time zone

[Otavio Salvador]

On Wed, Nov 2, 2011 at 22:47, Ni Qingliang <niqingliang@insigma.com.cn> wrote:
> maybe we can do the link in system booting, use the variable "TZ" to
> create the symlink /etc/localtime, just like archlinux.
> e.g. providing one script in /etc/rcS.d/ to create the symlink.

This ought to be done by image IMO; so a kind of post rootfs
generation hook might be use allowing it to be set per-image.

I personally have this exactly use-case here at work.

-- 
Otavio Salvador                             O.S. Systems
E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br

Re: how to set time zone

[Ni Qingliang]

what is "IMO"?

On Thu, 2011-11-03 at 09:19 +0800, Otavio Salvador wrote:
> On Wed, Nov 2, 2011 at 22:47, Ni Qingliang <niqingliang@insigma.com.cn> wrote:
> > maybe we can do the link in system booting, use the variable "TZ" to
> > create the symlink /etc/localtime, just like archlinux.
> > e.g. providing one script in /etc/rcS.d/ to create the symlink.
> 
> This ought to be done by image IMO; so a kind of post rootfs
> generation hook might be use allowing it to be set per-image.
> 
> I personally have this exactly use-case here at work.
> 
> --
> Otavio Salvador                             O.S. Systems
> E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
> Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br

-- 
Yi Qingliang
niqingliang@insigma.com.cn
https://niqingliang2003.wordpress.com

Re: how to set time zone

[Philip Balister]

On 11/02/2011 09:35 PM, Ni Qingliang wrote:
> what is "IMO"?

"In my opinion"

See http://www.internetslang.com/

I'm not suggesting reading the entire thing and using the slang in email
though :)

Philip


> 
> On Thu, 2011-11-03 at 09:19 +0800, Otavio Salvador wrote:
>> On Wed, Nov 2, 2011 at 22:47, Ni Qingliang <niqingliang@insigma.com.cn> wrote:
>>> maybe we can do the link in system booting, use the variable "TZ" to
>>> create the symlink /etc/localtime, just like archlinux.
>>> e.g. providing one script in /etc/rcS.d/ to create the symlink.
>>
>> This ought to be done by image IMO; so a kind of post rootfs
>> generation hook might be use allowing it to be set per-image.
>>
>> I personally have this exactly use-case here at work.
>>
>> --
>> Otavio Salvador                             O.S. Systems
>> E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
>> Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br
> 

Re: how to set time zone

[Ni Qingliang]

thanks! :)

On Thu, 2011-11-03 at 09:58 +0800, Philip Balister wrote:
> On 11/02/2011 09:35 PM, Ni Qingliang wrote:
> > what is "IMO"?
> 
> "In my opinion"
> 
> See http://www.internetslang.com/
> 
> I'm not suggesting reading the entire thing and using the slang in email
> though :)
> 
> Philip
> 
> 
> >
> > On Thu, 2011-11-03 at 09:19 +0800, Otavio Salvador wrote:
> >> On Wed, Nov 2, 2011 at 22:47, Ni Qingliang <niqingliang@insigma.com.cn> wrote:
> >>> maybe we can do the link in system booting, use the variable "TZ" to
> >>> create the symlink /etc/localtime, just like archlinux.
> >>> e.g. providing one script in /etc/rcS.d/ to create the symlink.
> >>
> >> This ought to be done by image IMO; so a kind of post rootfs
> >> generation hook might be use allowing it to be set per-image.
> >>
> >> I personally have this exactly use-case here at work.
> >>
> >> --
> >> Otavio Salvador                             O.S. Systems
> >> E-mail: otavio@ossystems.com.br  http://www.ossystems.com.br
> >> Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br
> >

-- 
Yi Qingliang
niqingliang@insigma.com.cn
https://niqingliang2003.wordpress.com

Re: how to set time zone

[Andrea Adami]

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On Wed, Nov 2, 2011 at 8:15 PM, Mark Hatle <mark.hatle@windriver.com> wrote:

> On 11/2/11 12:32 PM, Andrea Adami wrote:
> > On Mon, Oct 31, 2011 at 1:44 AM, Ni Qingliang <
> niqingliang@insigma.com.cn
> > <mailto:niqingliang@insigma.com.cn>> wrote:
> >
> >     I'd like the 'system level configuration' solution.
> >
> >     the /etc/localtime/ link can be done when packaging rootfs (using the
> >     system level configuration).
> >
> >     On Fri, 2011-10-28 at 22:43 +0800, Mark Hatle wrote:
> >     > Setting the default TZ for the image is something that should be
> done in a
> >     post
> >     > install script for the tzdata package or something similar.
> >     >
> >     > Since the /etc/localtime is usually a copy/hardlink or symlink to
> the timezone
> >     > data we don't want to package it up.  Instead we want to perform
> the actions
> >     > that a program running on the target system itself would use to
> change the
> >     timezone.
> >     >
> >     > So I think the easiest approach is to add a system level
> configuration
> >     variable
> >     > (set the default).
> >     >
> >     > Then use this variable to populate the configuration file that
> specifies the
> >     > system timezone... and then use the post install process to check
> the contents
> >     > of a text file.
> >     >
> >     > Alternatively do this via an initscript -- but for folks w/
> read-only
> >     > filesystems I'm not sure that will work.
> >     >
> >     > --Mark
> >
> > <cut>
> >
> > Maybe I misunderstand "system level configuration" but in the meta-oe
> recipe we have
> >
> > DEFAULT_TIMEZONE ?= "Europe/London"
> >
> > Maybe UTC would be better?
>
> To me no timezone (which is UTC) is preferable as the system designer can
> then
> set the timezone, externally to the package(s).
>
> > Note how the variable is weak thus can be overridden in local.conf.
> >
> > Secondly, why do it as post-install or at image do_rootfs stage when we
> have set
> > the variable and are therefore able to provide sane defaults in
> do_install?
>
> If it's done within a do_install, then the file (/etc/timezone) itself gets
> placed into the package.  If it's in the package, then if/when someone
> upgrades
> the package from a feed the timezone gets reset to the previous value.
>  That's a
> bug IMHO.
>

Sure, I overlooked that!


> If it's done as a post-install script, then the timezone configuration can
> be
> evaluated and if one isn't set -- or there is no timezone file -- then we
> can
> set it to UTC or a similar default timezone.. (the value in the
> DEFAULT_TIMEZONE
> variable is reasonable in this approach.)
>
> maybe "Factory" then?
See post-install script example:
http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/sys-libs/timezone-data/timezone-data-2011k.ebuild


> > Other points before starting to write a patch:
> > -why is the recipe in oe-core doing   chown -R root:root ${D}   ?
>
> There was an issue with the way the timezone data was
> extracted/constructed that
> it was have all of the build system's uid/gid preserved in the copy to the
> final
> install directory -- so when packaging incorrect usernames and groups were
> fed
> into the process causing issues.
>
> A simple chown -R root:root ${D} ensured that all of the timezone data was
> owned
> by the root user (on the target).
>
> > -the logic around   # libc is removing zoneinfo files from package
> >   Is it only eglibc?
>

> Timezone info is updated more often then the system libc.  So the zoneinfo
> files
> are handled externally of the libc.  This allows for easier updates over
> time..
> (This is my guess, as I'm not familiar with exactly what this comment
> refers to.)
>
> Comments in meta-oe recipe would suggest that apparently only eglibc is
removing zoneinfo file.

       # Only eglibc is removing zoneinfo files from package
        if [ "${LIBC}"x = "eglibc"x ] ; then
          cp -pP "${S}/zone.tab" ${D}${datadir}/zoneinfo
          cp -pP "${S}/iso3166.tab" ${D}${datadir}/zoneinfo
        fi


Being that we need the files on first boot, I'm not against providing
'Factory' settings during image do_rootfs or even in base-files.
The settings of timezone and locale (and keyboard) are typically done by
user on first boot, at least in graphical environments.

Thanks for your comments!

Regards


Andrea

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