rpmdevtools (rpmdev-extract) rpmパッケージを展開するには

http://www.atmarkit.co.jp/flinux/rensai/linuxtips/956rpmdevextract.html

[hirasawa@centos-hira /]$ cat /tmp/yumlist | grep "^rpm.*"
rpm.i686                                   4.8.0-27.el6                @base
rpm-libs.i686                              4.8.0-27.el6                @base
rpm-python.i686                            4.8.0-27.el6                @base
rpmforge-release.i686                      0.5.2-2.el6.rf              installed
rpm-apidocs.noarch                         4.8.0-27.el6                base
rpm-build.i686                             4.8.0-27.el6                base
rpm-cron.noarch                            4.8.0-27.el6                base
rpm-devel.i686                             4.8.0-27.el6                base
rpm-macros-rpmforge.noarch                 0-6.el6.rf                  rpmforge
rpmdevtools.noarch                         7.5-1.el6                   base
rpmlint.noarch                             0.94-2.el6                  base
rpmstrap.i686                              0.5.2-2.el6.rf              rpmforge
[hirasawa@centos-hira /]$