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#!/bin/sh
#
#
# This is an example hook script. It will be run by 'mkinitramfs'
# when it creates the image. It's job is to decide which files to
# install, then install them into the staging area, where the
# initramfs is being created. This happens when a new 'linux-image'
# package is installed, or when the administrator runs 'mkinitramfs'
# by hand to update an initramfs image.
#
# CONFDIR -- usually /etc/initramfs-tools, can be set on mkinitramfs
# command line.
#
# DESTDIR -- The staging directory where we are building the image.
#
# see initramfs-tools(7)
#
# 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
# You can do anything you need to from here on.
#
# Source the optional 'hook-functions' scriptlet, if you need the
# functions defined within it. Read it to see what is available to
# you. It contains functions for copying dynamically linked program
# binaries, and kernel modules into the DESTDIR.
#
. /usr/share/initramfs-tools/hook-functions
# If this hook script is a conffile (and thus stored in
# /etc/mkinitramfs/hooks), it must take care to do the right thing
# when the package containing it is removed but not purged. There of
# course may be other reasons to have custom logic deciding what to
# install. The version variable may be useful for this.
#
if command -v myprog >/dev/null 2>&1; then
copy_exec /usr/bin/myprog usr/bin
fi
# To accompany this, there should usually be a script for inside the
# initramfs named something like:
#
# "/etc/mkinitramfs/local-premount/myprog"
#
# ... and it should do what is necessary to have 'myprog' get run
# inside the early runtime environment.
exit 0
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