I was pointed to the following:
When the rpm command executes the scriptlets in a package it indicates if
the action preformed is an install, erase, upgrade or reinstall by passing
an integer argument to the script in question according to the following:
install erase upgrade reinstall
%pre 1 - 2 2
%post 1 - 2 2
%preun - 0 1 -
%postun - 0 1 -
This means that for example a package that installs an init script with
the chkconfig command should uninstall it only on erase and not upgrade with
the following snippet:
%preun
if [ $1 -eq 0 ] ; then
/sbin/chkconfig --del %{name}
fi
https://fedoraproject.org/wiki/Packaging:Guidelines#Scriptlets
Although I found I had to do:
if [ $1 -eq 0 ]; then \
groupdel ....; \
fi
On 10/14/10 11:57 AM, "Rich Smrcina" <[email protected]> wrote:
> While %postun is running do you have any context of the rpm command line
> options?
>
> On 10/14/2010 10:34 AM, Neale Ferguson wrote:
>> I have built an RPM that during installation needs to add an entry to
>> /etc/passwd and /etc/group. This is easy to do using the %pre section:
>>
>> %pre
>> egrep -q "^njeanon" /etc/group; \
>> if [ $? != 0 ]; then \
>> groupadd nje 2>/dev/null; \
>> groupadd njeanon 2>/dev/null; \
>> useradd njeanon -g njeanon; \
>> fi
>>
>> Similarly, when the RPM is being uninstalled I need to get rid of those
>> entries. Again, easily done with %postun:
>>
>> %postun
>> rm -rf %{nobodyhome}
>> userdel njeanon 2>/dev/null
>> groupdel njeanon 2>/dev/null
>> groupdel nje 2>/dev/null
>>
>> However, if I am upgrading using -Uhv then I get the %pre and %postun
>> sections run as part of the upgrade. This means that the work done in %pre
>> gets undone by %postun. If I was simply doing a rpm --erase I would be
>> satisfied but doing -U then this is not what I want.
>>
>> So my question is, how do I prevent -Uhv undoing the %pre work (to be
>> pedantique if it's doing an upgrade then the groupadds aren't issued because
>> the check tells me the entries are already there).
>>
>> Neale
>>
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>
>
> --
> Rich Smrcina
> Velocity Software, Inc.
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send email to [email protected] with the message: INFO LINUX-390 or visit
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