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