On Jan 6, 2006, at 6:42 AM, Christian.Rohrmeier@xxxxxxxxxxx wrote:
Hello All,
I am writing an RPM for RHEL 2.1. In it, I need to take actions in the
%post script depending on the Update Release (e.g. RHEL 2.1 WS
Update 3).
The two ways I have tried to find this information has been:
1) Reading /etc/redhat-release. This is unfortunately inconsistent.
Examples:
RHEL 2.1 WS Update 5 says: "Red Hat Enterprise Linux WS
release 2.1
U5 (Tampa)"
RHEL 2.1 WS Update 5 says: "Red Hat Enterprise Linux WS
release 2.1
(Tampa)"
RHEL 2.1 AS Update 6 says : "Red Hat Linux Advanced Server
release
2.1AS (Pensacola)"
Therefor I cannot rely upon /etc/redhat-release to provide me with the
update release information under RHEL 2.1 (however RHEL 3 and 4 have a
consistent format).
(aside) You can certainly deal with the know variations of the
strings, "cannot rely" is total FUD.
2) Reading the redhat-release package information. Technically this
contains the information (albeit in a peculiar form):
RHEL 2.1 WS Update 5:
# rpm -qa | grep redhat-release
redhat-release-ws-2.1WS-18
RHEL 2.1 WS Update 6:
# rpm -qa | grep redhat-release
redhat-release-ws-2.1WS-20
I guess Update 5 is release "18" and Update 6 is release "20".
Okay, fine
by me.
I need this information in my %post script. However, under RHEL
2.1, here's
what happens when my %postscript contains the following line:
INFO=`rpm -qa | grep redhat-release`
# rpm -ivh test-1.0-1.noarch.rpm
Preparing...
###########################################
[100%]
error: cannot get shared lock on /var/lib/rpm/Packages
error: cannot open Packages index using db3 - Operation not
permitted (1)
This works with RHEL 3 and 4 however.
So, here's my primary question:
How do I find out the Update Release of an RHEL 2.1 System, in a
form that
I can use in an RPM %post script?
The /etc/redhat-release file was (and prolly still is) the
"supported" mechanism in AS 2.1 for determining
the distribution release.
Further, how indeed do I get access to any RPM database information
from
with an RPM %post script?
The version of rpm in AS 2.1 is too old (as in hadn't been
implemented yet) to support concurrent access reliably.
If all you need is the version of redhat-release installed, then try
grep redhat-release /var/log/rpmpkgs
That file lists all packages installed and should be portable as well.
Seeing as how the whole idea of RPM is to take appropriate action
based on
the versions of other installed software packages, there must be a
way to
access such information on RHEL 2.1.
Heh, basing packaging on vendor release info is intrinsically flawed,
and is certainly
not the "whole idea of RPM ...". But lets not go there ...
73 de Jeff
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