If you want to find from which rpm package a file is installed, try following command:

repoquery -f <path/filename>

Example: if you want to find perl

[root@srv /]# whereis -b perl
perl: /usr/bin/perl

[root@srv /]# repoquery -f /usr/bin/perl
perl-4:5.8.8-42.el5.i386
perl-4:5.8.8-43.el5_11.i386
perl-4:5.8.8-42.el5.x86_64
perl-4:5.8.8-41.el5.i386
perl-4:5.8.8-43.el5_11.x86_64
perl-4:5.8.8-43.el5_11.x86_64