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Description of problem:
I see this problem mentioned with regards to RH8 and rpm < 4.2, but I
seem to be seeing the same problem on RH9 with rpm-4.2-0.69.  Here is a
sample spec file:

Summary:        Test package
Name:           test-package
Version:        1.0
Release:        1
Group:          System Environment/Daemons
License:        GPL
BuildRoot:      %{_builddir}/%name-%version
BuildArch:      noarch
Prefix:         /usr/local

%description
This is a test package

%pre
echo "pre - RPM_INSTALL_PREFIX = \"$RPM_INSTALL_PREFIX\""

%install

%post
echo "post - RPM_INSTALL_PREFIX = \"$RPM_INSTALL_PREFIX\"";

%files

%changelog
* Thu May 29 2003 Robert Flemming <flemming>
- Test package

Here are the results when install it on my RH9 system:

foo:/tmp# rpm -ivh test-package-1.0-1.noarch.rpm
Preparing...                ########################################### [100%]
pre - RPM_INSTALL_PREFIX = ""
   1:test-package           ########################################### [100%]
post - RPM_INSTALL_PREFIX = ""

foo:/tmp# rpm -ivh --prefix=/tmp test-package-1.0-1.noarch.rpm
Preparing...                ########################################### [100%]
pre - RPM_INSTALL_PREFIX = ""
   1:test-package           ########################################### [100%]
post - RPM_INSTALL_PREFIX = ""

Now here is the same package being installed on a 7.2 machine with
rpm-4.0.3-1.03 installed:

[root@bar tmp]# rpm -ivh test-package-1.0-1.noarch.rpm
Preparing...                ########################################### [100%]
pre - RPM_INSTALL_PREFIX = "/usr/local"
post - RPM_INSTALL_PREFIX = "/usr/local"

[root@bar tmp]# rpm -ivh --prefix=/tmp test-package-1.0-1.noarch.rpm
Preparing...                ########################################### [100%]
pre - RPM_INSTALL_PREFIX = "/tmp"
post - RPM_INSTALL_PREFIX = "/tmp"

With $RPM_INSTALL_PREFIX returning nothing, all scripts are performing operations on the root file system, which is VERY bad in the context of the package I'm building.  I've added a test in the pre section so I don't hose my test machine (again), but this is kind of a important problem.

Robert


Version-Release number of selected component (if applicable):
rpm-4.2-0.69

How reproducible:
Always

Steps to Reproduce:
1. Use the included test-package spec file
2.
3.


Actual Results:  See above

Expected Results:  See what happens on RH 7.2 system as noted above

Additional info: