Re: [PATCH] dbus: remove /var/run from package as it is created on startup

[Jonathan Liu <net147@gmail.com>]

On 23/05/2013 9:38 PM, Richard Purdie wrote:
> On Thu, 2013-05-23 at 14:02 +1000, Jonathan Liu wrote:
>> /var/run is a tmpfs that is created on startup.
>> For sysvinit, /var/run/dbus is created by populate-volatiles.sh.
>> For systemd, /var/run/dbus is created implicitly by dbus.socket when
>> creating a listen stream socket at /var/run/dbus/system_bus_socket.
>>
>> Signed-off-by: Jonathan Liu <net147@gmail.com>
>> ---
>>   meta/recipes-core/dbus/dbus.inc | 7 +++++--
>>   1 file changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/meta/recipes-core/dbus/dbus.inc b/meta/recipes-core/dbus/dbus.inc
>> index 2be5bda..8055824 100644
>> --- a/meta/recipes-core/dbus/dbus.inc
>> +++ b/meta/recipes-core/dbus/dbus.inc
>> @@ -101,9 +101,9 @@ do_install() {
>>   	     > ${D}${sysconfdir}/default/volatiles/99_dbus
>>   
>>
>> -	mkdir -p ${D}${localstatedir}/run/dbus ${D}${localstatedir}/lib/dbus
>> +	mkdir -p ${D}${localstatedir}/lib/dbus
>>   
>> -	chown messagebus:messagebus ${D}${localstatedir}/run/dbus ${D}${localstatedir}/lib/dbus
>> +	chown messagebus:messagebus ${D}${localstatedir}/lib/dbus
> Is what populate-volatiles does truly equivalent? Does this directory
> need to be owned by messagebus (which is a user created by dbus) iirc?
>
> Cheers,
>
> Richard
The dbus recipe writes /etc/default/volatiles/99_dbus.
For sysvinit case, this will cause populate-volatiles.sh to create 
/var/run/dbus owned by messagebus:messagebus with 0755 permissions so it 
is the same.
The systemd init doesn't use populate-volatiles.sh and it's created 
implicitly so it is owned by root:root with 0755 permissions.

For distributions using sysvinit (e.g. Debian), /var/run/dbus is 
typically owned by messagebus:messagebus. There is no dbus user/group in 
/etc/passwd or /etc/group.
For distributions using systemd (e.g. Arch Linux and Fedora), 
/var/run/dbus (actually /run/dbus) is typically owned by root:root. 
There is no messagebus user/group in /etc/passwd or /etc/group, but 
there is dbus.

Regards,
Jonathan