[OE-core] [PATCH] avahi: fix useradd race condition

[Koen Kooi]

Op 3 nov. 2011, om 22:04 heeft Scott Garman het volgende geschreven:

> On 11/03/2011 07:39 AM, Richard Purdie wrote:
>> On Thu, 2011-11-03 at 14:04 +0100, Koen Kooi wrote:
>>> Op 3 nov. 2011, om 13:57 heeft Koen Kooi het volgende geschreven:
>>> 
>>>> Avahi doesn't work at boot because of:
>>>> 
>>>> + sh /OE/../rootfs/var/lib/opkg/info/avahi-daemon.preinst
>>>> Running useradd commands...
>>>> grep: /OE/../rootfs/etc/passwd: No such file or directory
>>>> 
>>>> That is due to:
>>>> 
>>>> Package: avahi-daemon
>>>> Version: 0.6.30-r9.0
>>>> [..]
>>>> Depends: libavahi-core7 (>= 0.6.30), libdaemon0 (>= 0.14), libcap2 (>= 2.22), libavahi-common3 (>= 0.6.30), libdbus-1-3 (>= 1.4.12), sysvinit-pidof, libc6 (>= 2.12), libexpat1 (>= 2.0.1)
>>>> 
>>>> After this patch:
>>>> 
>>>> Package: avahi-daemon
>>>> Version: 0.6.30-r10.0
>>>> [..]
>>>> Depends: libavahi-core7 (>= 0.6.30), libdaemon0 (>= 0.14), libcap2 (>= 2.22), libavahi-common3 (>= 0.6.30), libdbus-1-3 (>= 1.4.12), sysvinit-pidof, libc6 (>= 2.12), shadow, libexpat1 (>= 2.0.1), base-passwd
>>>> 
>>>> This also changes ${PN}-daemon to avahi-daemon to be consistent with the PACKAGES/FILES lines below
>>>> 
>>>> Signed-off-by: Koen Kooi<koen at dominion.thruhere.net>
>>>> ---
>>>> meta/recipes-connectivity/avahi/avahi.inc |    7 ++++---
>>>> 1 files changed, 4 insertions(+), 3 deletions(-)
>>>> 
>>>> diff --git a/meta/recipes-connectivity/avahi/avahi.inc b/meta/recipes-connectivity/avahi/avahi.inc
>>>> index 79cfd73..728c38f 100644
>>>> --- a/meta/recipes-connectivity/avahi/avahi.inc
>>>> +++ b/meta/recipes-connectivity/avahi/avahi.inc
>>>> @@ -14,7 +14,7 @@ SECTION = "network"
>>>> # python scripts are under GPLv2+
>>>> LICENSE = "GPLv2+&  LGPLv2.1+"
>>>> 
>>>> -INC_PR = "r9"
>>>> +INC_PR = "r10"
>>>> 
>>>> DEPENDS = "expat libcap libdaemon dbus glib-2.0"
>>>> 
>>>> @@ -23,8 +23,9 @@ SRC_URI = "http://avahi.org/download/avahi-${PV}.tar.gz \
>>>>           file://99avahi-autoipd \
>>>>           file://initscript.patch"
>>>> 
>>>> -USERADD_PACKAGES = "${PN}-daemon"
>>>> -USERADD_PARAM_${PN}-daemon = "--system --home /var/run/avahi-daemon \
>>>> +USERADDPN = "avahi-daemon"
>>> 
>>> My gut feeling is that useradd.bbclass should add the RDEPENDS in its
>>> pythoncode instead of relying on people to set both USERADD_PACKAGES
>>> and USERADDPN to the same value.
>> 
>> Agreed, looking at the code I think we can make this easier on the user.
>> I'll take the fix to solve the short term issues but we could do with
>> improving this.
> 
> I've filed a bug and will work on a fix for this:
> 
> http://bugzilla.pokylinux.org/show_bug.cgi?id=1727
> 
> Thank you for uncovering the source of the problem.

Some more digging reveals a second bug:

+ for i in '/OE/tentacle/build/tmp-angstrom_2010_x-eglibc/work/beaglebone-angstrom-linux-gnueabi/cloud9-image-1.0-r0/rootfs/var/lib/opkg/info/*.preinst'

That will go alphabetically, with 'avahi-daemon' going before 'base-passwd' :(

I'm going to test this patch:

diff --git a/meta/classes/rootfs_ipk.bbclass b/meta/classes/rootfs_ipk.bbclass
index e02b816..9a8edb1 100644
--- a/meta/classes/rootfs_ipk.bbclass
+++ b/meta/classes/rootfs_ipk.bbclass
@@ -77,6 +77,15 @@ fakeroot rootfs_ipk_do_rootfs () {
        ${ROOTFS_POSTINSTALL_COMMAND}
        
        runtime_script_required=0
+
+       # Base-passwd needs to run first to install /etc/passwd and friends
+       if [ -e ${IMAGE_ROOTFS}${opkglibdir}/info/base-passwd.preinst ] ; then
+               if ! sh $i; then
+                       runtime_script_required=1
+                       opkg-cl ${IPKG_ARGS} flag unpacked base-passwd
+               fi
+       fi
+


regards,

Koen
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