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- #!/bin/sh
-
- #
- # The environment contains at least:
- #
- # CONFDIR -- usually /etc/mkinitramfs, can be set on mkinitramfs
- # command line.
- #
- # DESTDIR -- The staging directory where we are building the image.
- #
- # TODO: Decide what environment variables are meaningful and defined
- # in this context, then document them as part of the interface.
- #
- # TODO: Write a common header for these examples or move this
- # documentation to a man page and reference it here. :-)
- #
-
- #
- # List the soft prerequisites here. This is a space separated list of
- # names, of scripts that are in the same directory as this one, that
- # must be run before this one can be.
- #
- PREREQ=""
-
- prereqs()
- {
- echo "$PREREQ"
- }
-
- case $1 in
- # get pre-requisites
- prereqs)
- prereqs
- exit 0
- ;;
- esac
-
- #
- # Source the 'hook-functions' scriptlet (for 'catenate_cpiogz'):
- #
- . /usr/share/initramfs-tools/hook-functions
-
- #
- # Lets pretend it has a conffile (think debconf), and we source it
- # here. Don't make debconf lookup calls here. The postinst for the
- # package owning this hook script should have done that and configured
- # the "/etc/default/conffile" already.
- #
- # TODO: How does the package ensure that it's installed BEFORE the
- # corresponding 'linux-image' package? Can it declare that, in
- # the case where it's an add-on that the 'linux-image' is not
- # aware of? This might be an apt and dpkg issue.
- #
- # * Eg. an optional usplash or suspend2ui_fbsplash package.
- #
- . /etc/default/mypackage-initramfs
-
- #
- # Also pretend that we only include our initramfs overlay if an opion
- # is not "no", and the 'linux-image' package we are generating this
- # initramfs for matches the version this script's package is designed
- # for. Just for example; pretend this example mkinitramfs hook script
- # is part of a 'linux-image' or 'xxx-modules' package.
- #
- if [ "$MYOPTION" != "no" -a "$version" = "2.6.12+ss2.1.9.1" ]; then
- catenate_cpiogz /usr/lib/mypackage/initramfs.cpio.gz
- fi
-
- #
- # In this case, there does not have to be an (eg.):
- #
- # "/etc/mkinitramfs/init-top/mypackage"
- #
- # ... since that script is probably inside of the initramfs overlay
- # already. If it's a conffile though, it does not belong in there,
- # and should be placed in the appropriate location inside of
- # "/etc/mkinitramfs". Remember that if it needs access to the
- # settings in our "/etc/default/mypackage-initramfs", then that file
- # must also get copied into a location inside of ${DESTDIR} by this
- # hook script in order to make it available inside of the initramfs
- # environment.
- #
-
- exit 0
-