On 11/12/2013 06:30 PM, Karthik Ram wrote:
I am trying to use the yum api to patch a package.
It works in most cases but in some cases it does fails and gives strange
errors.
When I look at the yum cli source code, it appears that it uses the
rpmtrans directly and not the yum api to perform updates.
here's a test code:
#cat test.py
import yum;
updates = ['initscripts']
yumb = yum.YumBase()
pl = yumb.doPackageLists('updates')
exactmatch, matched, unmatched = yum.packages.parsePackages(pl.updates,
updates)
yb = yum.YumBase()
yb.doUnlock()
yb.conf.assumeyes = True
for po in exactmatch:
yb.update(po)
yb.buildTransaction()
yb.processTransaction() #omitting callbacks for illustration
yb.closeRpmDB()
and here's the error:
# python test.py
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: centos.mirror.ndchost.com <http://centos.mirror.ndchost.com>
* extras: mirrors.easynews.com <http://mirrors.easynews.com>
* updates: mirror.rackspace.com <http://mirror.rackspace.com>
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: centos.mirror.ndchost.com <http://centos.mirror.ndchost.com>
* extras: mirrors.easynews.com <http://mirrors.easynews.com>
* updates: mirror.rackspace.com <http://mirror.rackspace.com>
Running rpm_check_debug
Error in PREIN scriptlet in rpm package
initscripts-9.03.38-1.el6.centos.2.x86_64
/var/tmp/rpm-tmp.JGu9SX: line 1: /usr/sbin/groupadd: Permission denied
error: %pre(initscripts-9.03.38-1.el6.centos.2.x86_64) scriptlet failed,
exit status 126
error: install: %pre scriptlet failed (2), skipping
initscripts-9.03.38-1.el6.centos.2
initscripts-9.03.38-1.el6.centos.x86_64 was supposed to be removed but
is not!
Verify: 1/2: initscripts.x86_64 0:9.03.38-1.el6.centos - ud
Verify: 2/2: initscripts.x86_64 0:9.03.38-1.el6.centos.2 - u
The same thing works if I call the yum cli - and I believe ud flag -
where it is trying to remove it is not getting removed (and yum cli
appears to use the rpmtransaction directly and not this api).
My understanding is that buildtransaction does depsolve and process will
do whatever has to be done to each package in the transaction set (if
something has to be deprecated).
os info:
uname -a
Linux CentOS6464b 2.6.32-358.el6.x86_64 #1 SMP Fri Feb 22 00:31:26 UTC
2013 x86_64 x86_64 x86_64 GNU/Linux
cat /etc/issue
CentOS release 6.4 (Final)
Kernel \r on an \m
This does not happen on all centos 6.4s but in this case - the fact that
yum cli works and the api does not is the main issue.
Any ideas on how to resolve this?
Most likely your custom updater is missing the required selinux context
for "rpm work" and because of that, scripts are failing on systems where
selinux is enabled:
[pmatilai@mursu ~]$ ls -Z /bin/rpm /usr/bin/yum
-rwxr-xr-x. root root system_u:object_r:rpm_exec_t:s0 /bin/rpm
-rwxr-xr-x. root root system_u:object_r:rpm_exec_t:s0 /usr/bin/yum
^^^^^^^^^^
'chcon -t rpm_exec_t <path to your script>' should fix it.
- Panu -
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