user defined macros in RPMS ?

["Lis Maria" <lismariain gmail com>]

Hi

 

I am having a doubt about the user defined macros in RPMS.

 

I believe we can create our own macros in the .rpmmacros file. So i did create a macro called %_user_switch  xxxx in the .rpmmacros file. Now i am using this macro in the spec file's

%pre section as

 

  su %{_user_switch}

 

Now before firing rpm -Uvh,  i am redefining this macro at the command line as  rpm --define '_user_switch yyyy'

 

Now if i try to install my rpm, it is installing the files as xxxx itself ....

 

Is there any other way i can redefine a macro for rpm install ?  

 

Thanks & Regards

 

Lis Thomas