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#!/bin/sh
# Takes a file containing a list of modules to be added as an argument
# Figures out dependancies and adds it in.
manual_add_modules()
{
# Sanity check
if [ ! -e ${1} ]; then
return
fi
for x in $(sed -e '/^#/d' ${1}); do
for y in $(modprobe --set-version=${version} --show-depends ${x} | awk '{ print $2 }'); do
# Prune duplicates
if [ -e ${TMPDIR}/${y} ]; then
continue
fi
mkdir -p ${TMPDIR}/$(dirname ${y})
ln -s ${y} ${TMPDIR}/$(dirname ${y})
echo $(basename ${y} .ko) >>${TMPDIR}/conf/modules
done
done
}
# Copy entire subtrees to the initramfs
copy_modules_dir()
{
tmpdir_modbase=${TMPDIR}/lib/modules/${version}
mkdir -p $(dirname ${tmpdir_modbase}/${1})
cp -a /lib/modules/${version}/${1} ${tmpdir_modbase}/${1}
}
# Modules that we always add to the initramfs
auto_add_modules()
{
copy_modules_dir kernel/drivers/net
copy_modules_dir kernel/drivers/scsi
copy_modules_dir kernel/drivers/ide
copy_modules_dir kernel/drivers/md
copy_modules_dir kernel/drivers/usb
copy_modules_dir kernel/drivers/block
copy_modules_dir kernel/drivers/input
copy_modules_dir kernel/fs/ext2
copy_modules_dir kernel/fs/ext3
copy_modules_dir kernel/fs/isofs
copy_modules_dir kernel/fs/jbd
copy_modules_dir kernel/fs/jfs
copy_modules_dir kernel/fs/nfs
copy_modules_dir kernel/fs/reiserfs
copy_modules_dir kernel/fs/xfs
# These aren't caught by the above but really need to be there:
for x in mbcache nfs af_packet raid1; do
for y in $(modprobe --set-version=${version} --show-depends ${x} | awk '{ print $2 }'); do
# Prune duplicates
if [ -e ${TMPDIR}/${y} ]; then
continue
fi
mkdir -p ${TMPDIR}/$(dirname ${y})
ln -s ${y} ${TMPDIR}/$(dirname ${y})
depmod -b ${TMPDIR} ${version}
done
done
}
usage()
{
cat >&2 << EOF
Usage: ${0} [OPTION]... <-o outfile> [version]
Options:
-d confdir Specify an alternative configuration directory.
-k Keep temporary directory used to make the image.
-o outfile Write to outfile.
-r root Override ROOT setting in mkinitrd.conf.
See ${0}(8) for further details.
EOF
exit 1
}
# Defaults
keep="n"
CONFDIR="/etc/mkinitramfs"
while getopts "d:ko:r:" flag; do
case $flag in
d)
CONFDIR="${OPTAGS}"
if [ ! d "${CONFDIR}" ]; then
echo "${0}: ${CONFDIR}: Not a directory" >&2
exit 1
fi
;;
o)
outfile="${OPTARG}"
;;
v)
version="${OPTARG}"
;;
k)
keep="y"
;;
esac
done
shift $((${OPTIND} - 1))
. ${CONFDIR}/initramfs.conf
if [ x${outfile} = x ] || [ ${#} -ne 1 ]; then
usage
fi
# And by "version" we really mean path to kernel modules
# This is braindead, and exists to preserve the interface with mkinitrd
version=${1}
[ $# -gt 0 ] || unset version
case ${version} in
/lib/modules/*/[!/]*)
;;
/lib/modules/[!/]*)
version=${version#/lib/modules/}
version=${version%%/*}
;;
esac
case ${version} in
*/*)
echo $PROG: ${version} is not a valid kernel version >&2
exit 1
;;
esac
version="${version-$(uname -r)}"
if [ -d ${outfile} ]; then
echo "${outfile} is a directory"
exit 1
fi
if [ ! -e /lib/modules/${version} ]; then
echo "Cannot find /lib/modules/${version}"
exit 1
fi
TMPDIR=$(mktemp -d) || exit 1
mkdir -p ${TMPDIR}/modules ${TMPDIR}/conf ${TMPDIR}/etc
mkdir -p ${TMPDIR}/bin ${TMPDIR}/lib ${TMPDIR}/scripts
mkdir -p ${TMPDIR}/sbin
for x in ${CONFDIR}/modules /usr/share/initramfs-tools/modules.d/*; do
manual_add_modules ${x}
done
auto_add_modules
# Have to do each file, because cpio --dereference doesn't recurse down
# symlinks.
ln -s /usr/lib/klibc/bin/* ${TMPDIR}/bin
ln -s /usr/lib/klibc/lib/* ${TMPDIR}/lib
ln -s /usr/share/initramfs-tools/init ${TMPDIR}/init
cp -a /usr/share/initramfs-tools/scripts/* ${TMPDIR}/scripts
ln -s ${CONFDIR}/initramfs.conf ${TMPDIR}/conf
ln -s /etc/udev ${TMPDIR}/etc
# Hack until udev is built with klibc
ln -s /sbin/udev ${TMPDIR}/bin
ln -s /sbin/udevstart ${TMPDIR}/bin
ln -s /lib/libc.so.* ${TMPDIR}/lib
ln -s /lib/ld*.so.* ${TMPDIR}/lib
rm ${TMPDIR}/lib/*lsb*
# Busybox
rm ${TMPDIR}/bin/sh
ln -s /usr/lib/initramfs-tools/bin/busybox ${TMPDIR}/bin/sh
# This is ugly, but needed atm to make the builtins work =(
ln -s /usr/lib/initramfs-tools/bin/busybox ${TMPDIR}/bin/busybox
# Modutils
ln -s /sbin/modprobe ${TMPDIR}/sbin
ln -s /sbin/depmod ${TMPDIR}/sbin
ln -s /sbin/rmmod ${TMPDIR}/sbin
mkdir -p ${TMPDIR}/etc/modprobe.d
ln -s /etc/modprobe.d/aliases ${TMPDIR}/etc/modprobe.d
# Raid
ln -s /sbin/mdadm ${TMPDIR}/sbin
ln -s /sbin/mdrun ${TMPDIR}/sbin
(cd ${TMPDIR} && find . | cpio --quiet --dereference -o -H newc | gzip -9 >${outfile})
if [ "${keep}" = "y" ]; then
echo "Working files in ${TMPDIR}"
else
rm -rf "${TMPDIR}"
fi
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