Re: [PATCH] udev 182: Create a symlink of /lib/udev/udevd in /sbin

[ChenQi <Qi.Chen@windriver.com>]

On 11/28/2012 07:09 PM, Shakeel, Muhammad wrote:
> If we ensure that udev will always be found in /lib/udev/udevd then this patch will not be required.
>
> Actually I needed this patch to start udev on a mips64 target where ${base_libdir} is '/lib64' and original udev init script was failing to start udev.
> (I am not using initramfs).
>
> --Shakeel
Hi Muhammad,

I'm somewhat confused by this 'baselib' problem. I just built udev on a 
test machine which has mips64 arch. But it turned out that its baselib 
was '/lib' instead of '/lib64'.

How did you get '/lib64' on a mips64 target?

My test machine's conf file is:
"
require conf/machine/include/tune-mips64.inc

KERNEL_IMAGETYPE = "vmlinux"
KERNEL_ALT_IMAGETYPE = "vmlinux.bin"

SERIAL_CONSOLE = "115200 ttyS0"

MACHINE_EXTRA_RRECOMMENDS = " kernel-modules"
"

Besides, I tried it on x86-64.  As long as we don't explicitly specify 
multilib (lib64) for udev, it defaults to '/lib'.

I seems that the baselib defaults to '/lib64' only when the target has 
powerpc64 arch.

Could you please give me some more information to help me?

Thanks,
Chen Qi

> -----Original Message-----
> From: otavio.salvador@gmail.com [mailto:otavio.salvador@gmail.com] On Behalf Of Otavio Salvador
> Sent: Wednesday, November 28, 2012 3:52 PM
> To: ChenQi
> Cc: Shakeel, Muhammad; openembedded-core@lists.openembedded.org
> Subject: Re: [OE-core] [PATCH] udev 182: Create a symlink of /lib/udev/udevd in /sbin
>
> On Wed, Nov 28, 2012 at 12:26 AM, ChenQi<Qi.Chen@windriver.com>  wrote:
>> On 11/27/2012 10:15 PM, Otavio Salvador wrote:
>>> On Tue, Nov 27, 2012 at 10:57 AM, Shakeel, Muhammad
>>> <muhammad_shakeel@mentor.com>   wrote:
>>>> From: Muhammad Shakeel<muhammad_shakeel@mentor.com>
>>>>
>>>>    From udev 174 changelog:
>>>> "The udev daemon moved to /lib/udev/udevd. Non-systemd init systems
>>>> and non-dracut initramfs image generators need to change the init
>>>> scripts. Alternatively the udev build needs to move udevd back to
>>>> /sbin or create a symlink in /sbin, which is not done by default."
>>>>
>>>> Also for 64 bit architectures there exists /lib64/udev instead of
>>>> /lib/udev and current init script fails to start udev.
>>>>
>>>> Signed-off-by: Muhammad Shakeel<muhammad_shakeel@mentor.com>
>>> As far as I know, all code in master now handles it properly (the
>>> missing bits I sent a patch today) so why to include this symlink?
>>>
>> I'm not sure about this.
>>
>> Two things:
>>
>> 1) Have we ever tested udev on a target where its ${base_libdir} is
>> '/lib64'?
>> Apparently, if udevd is intalled under '/lib64', its init script
>> cannot start udev correctly.
>>
>> 2) Bug#2804 is related to to udev and ${base_libdir}.
>> https://bugzilla.yoctoproject.org/show_bug.cgi?id=2804
>> (Some packages hardcode their udev rules directory to be
>> '/lib/udev/rules.d/'. So can udev find them if the ${base_libdir} is
>> '/lib64'? )
> It seems the right fix for it is to ensure udev is always installed in /lib/udev/udevd (for all targets) as you propose to do for the rules.d directory.
>