suse-module-tools/regenerate-initrd-posttrans

#!/bin/bash
#
# Packages that install kernels or kernel-modules create a flag
#
#   /run/regenerate-initrd/<kernel image>
# 
# to have the initrd for <kernel image> generated, or
#
#   /run/regenerate-initrd/all
#
# to have all initrds generated. This script is called from posttrans
# and takes care of generating the initrds

shopt -s nullglob

dir=/run/regenerate-initrd

did_mkinitrd_setup=false
run_mkinitrd_setup()
{
	if ! $did_mkinitrd_setup; then
		if test -x /sbin/mkinitrd_setup; then
			/sbin/mkinitrd_setup
		fi
		did_mkinitrd_setup=true
	fi
}


if ! test -d "$dir"; then
	exit 0
fi
for f in "$dir"/*; do
	# check if we are in a build chroot
	if ! [ -f /etc/fstab -a ! -e /.buildenv -a -x /sbin/mkinitrd ] ; then
		echo "Please run mkinitrd as soon as your system is complete." >&2
		rm "$dir"/*
		exit 0
	fi
	break
done

if test -e "$dir/all"; then
	rm "$dir"/*
	run_mkinitrd_setup
	/sbin/mkinitrd
	exit
fi
err=0
for f in "$dir"/*; do
	rm "$f"
	image=${f##*/}
	initrd=initrd-${image#*-}
	if ! test -e "/boot/$image"; then
		echo "$0: /boot/$image does not exist, initrd won't be generated"
		continue
	fi
	run_mkinitrd_setup
	if ! /sbin/mkinitrd -k "/boot/$image" -i "/boot/$initrd"; then
		err=$?
	fi
done
exit $err