Installing package-installation scripts

The supported package formats, RPM, ipk, and deb, support the addition of installation scripts that can be run at different times during a package installation process. In this recipe, we will see how to install them.

Getting ready

There are different types of installation scripts:

• Preinstallation scripts (pkg_preinst): These are called before the package is unpacked

• Postinstallation scripts (pkg_postinst): These are called after the package is unpacked, and dependencies will be configured

• Preremoval scripts (pkg_prerm): These are called with installed or at least partially installed packages

• Postremoval scripts (pkg_postrm): These are called after the package's files have been removed or replaced

How to do it...

An example snippet of the installation of a preinstallation script in a recipe is as follows:

     pkg_preinst_${PN} () {
         # Shell commands
     }

All installation scripts work in the same way, with the exception that the postinstallation scripts...