313 lines
7.2 KiB
Bash
Executable File
313 lines
7.2 KiB
Bash
Executable File
#!/bin/sh
|
|
#
|
|
# tiny initramfs generation tool
|
|
|
|
panic() {
|
|
printf "panic >> %s\n" "$@"
|
|
exit 1
|
|
}
|
|
|
|
info() {
|
|
printf "info >> %s\n" "$@"
|
|
}
|
|
|
|
# remove tmpdir
|
|
remove_tmpdir() {
|
|
rm -rf "$tmpdir"
|
|
}
|
|
|
|
# change current directory to script directory if user haven't do it
|
|
check_currentdir() {
|
|
script_dir=$(dirname $(readlink -f -- "$0"))
|
|
[ "$PWD" = "$script_dir" ] || {
|
|
cd "$script_dir" || panic "failed to change directory"
|
|
}
|
|
}
|
|
|
|
# check needed files
|
|
check_requirements() {
|
|
# TODO use system busybox
|
|
for f in ./init ./busybox; do
|
|
[ -e "$f" ] || panic "$f doesn't exists"
|
|
done
|
|
|
|
# TODO handle busybox requirements ( busybox --list | grep ash )
|
|
}
|
|
|
|
# create FHS directory structure
|
|
create_structure() {
|
|
for d in dev tmp var run etc usr/lib usr/bin mnt/root proc root sys; do
|
|
mkdir -p "${tmpdir}/${d}"
|
|
done
|
|
}
|
|
|
|
# some dynamically linked libraries and binaries compiled with hardcoded
|
|
# dependencies path. to make it worked we need create symlinks for them.
|
|
# also POSIX ln doesn't have --relative flag like in GNU ln. as workaround
|
|
# we change directory to tmpdir and make needed symlinks.
|
|
create_symlinks() {
|
|
( cd "$tmpdir" && {
|
|
ln -s usr/lib lib
|
|
ln -s usr/lib lib64
|
|
ln -s usr/bin bin
|
|
ln -s usr/bin sbin
|
|
ln -s ../run var/run
|
|
cd "${tmpdir}/usr"
|
|
ln -s bin sbin
|
|
ln -s lib lib64
|
|
} )
|
|
}
|
|
|
|
#parse_fstab() {
|
|
# TODO parse fstab
|
|
#while [ "$use_fstab" -eq 1 ] && read fs dir type opts; do thing; done < /etc/fstab
|
|
#}
|
|
|
|
#parse_crypttab() {
|
|
# TODO parse crypttab
|
|
#}
|
|
|
|
# install mdev
|
|
install_mdev() {
|
|
install -m644 mdev.conf -t "${tmpdir}/etc"
|
|
install -Dm755 storage-device -t "${tmpdir}/lib/mdev"
|
|
}
|
|
|
|
# install mdevd
|
|
install_mdevd() {
|
|
install_binaries mdevd mdevd-coldplug
|
|
install -m644 mdev.conf -t "${tmpdir}/etc"
|
|
install -Dm755 storage-device -t "${tmpdir}/lib/mdev"
|
|
}
|
|
|
|
# install udev
|
|
install_udev() {
|
|
install_binaries udevd udevadm dmsetup
|
|
# FIXME rewrite this piece of crap
|
|
find /usr/lib/udev -type f | grep -v "rc_keymaps\|hwdb.d" | cpio -pd "$tmpdir" >/dev/null 2>&1
|
|
}
|
|
|
|
# handle lvm
|
|
install_lvm() {
|
|
install_binaries lvm
|
|
# FIXME this code doesn't working with udev
|
|
#mkdir "$tmpdir/etc/lvm"
|
|
# use_lvmetad = 0 - avoid lvmetad missing warning message
|
|
#cat <<EOF > "$tmpdir/etc/lvm/lvmlocal.conf"
|
|
#local {
|
|
# issue_discards = ${lvm_discard:-0}
|
|
# use_lvmetad = 0
|
|
#}
|
|
#EOF
|
|
# TODO implement use_lvmconf
|
|
}
|
|
|
|
# handle luks
|
|
install_luks() {
|
|
install_binaries cryptsetup
|
|
|
|
# avoid locking directory missing warning message
|
|
mkdir "${tmpdir}/run/cryptsetup"
|
|
|
|
# TODO get rid of this workaround
|
|
# workaround for luks2
|
|
install -s -m755 /usr/lib/libgcc_s.so.1 -t "${tmpdir}/usr/lib"
|
|
|
|
[ "$luks_discard" = 1 ] && luks_args="--allow-discards $luks_args"
|
|
|
|
# TODO detached header
|
|
# TODO keyfile
|
|
}
|
|
|
|
# TODO implement hostonly mode
|
|
# install drivers
|
|
install_drivers() {
|
|
modker="${moddir}${kernel}"
|
|
if [ "$hostonly" = 1 ]; then
|
|
[ -n "$root_type" ] || panic "hostonly mode required root_type option to be configured"
|
|
for modalias in $(find /sys/devices -name modalias -exec sort -u "{}" "+"); do
|
|
for driver in $(modprobe -D $modalias 2>/dev/null | cut -d " " -f 2); do
|
|
install -Dm644 "$driver" "${tmpdir}${driver}"
|
|
done
|
|
done
|
|
|
|
for root_driver in $(modprobe -D $root_type 2>/dev/null | cut -d " " -f 2); do
|
|
install -Dm644 "$root_driver" "${tmpdir}${root_driver}"
|
|
done
|
|
|
|
# TODO LUKS
|
|
# TODO LVM
|
|
else
|
|
find \
|
|
"${modker}/kernel/drivers/virtio" \
|
|
"${modker}/kernel/arch" \
|
|
"${modker}/kernel/crypto" \
|
|
"${modker}/kernel/fs" \
|
|
"${modker}/kernel/lib" \
|
|
"${modker}/kernel/drivers/block" \
|
|
"${modker}/kernel/drivers/ata" \
|
|
"${modker}/kernel/drivers/md" \
|
|
"${modker}/kernel/drivers/scsi" \
|
|
"${modker}/kernel/drivers/usb/storage" \
|
|
"${modker}/kernel/drivers/usb/host" \
|
|
-type f | cpio -pd "$tmpdir" >/dev/null 2>&1
|
|
fi
|
|
|
|
# install list of drivers
|
|
cp "${modker}/modules.softdep" "${modker}/modules.builtin" "${modker}/modules.order" "${tmpdir}/${modker}"
|
|
|
|
# generate dependencies list of drivers
|
|
depmod -b "$tmpdir" "$kernel"
|
|
}
|
|
|
|
# TODO make strip optional
|
|
# handle binaries
|
|
install_binaries() {
|
|
for b in $(printf "%s\n" "$@" | tr " " "\n"); do
|
|
# check binary existence
|
|
command -v "$b" >/dev/null 2>&1 || panic "$b doesn't exists"
|
|
|
|
# install and strip binary
|
|
install -s -m755 "$(command -v $b)" -t "${tmpdir}/usr/bin"
|
|
|
|
# check statically linking
|
|
ldd "$(command -v $b)" >/dev/null 2>&1 || continue
|
|
|
|
# install libraries
|
|
install_libraries $b
|
|
done
|
|
}
|
|
|
|
# TODO make strip optional
|
|
# handle libraries
|
|
install_libraries() {
|
|
for l in $(ldd "$(command -v $1)" | sed -nre 's,.* (/.*lib.*/.*.so.*) .*,\1,p' -e 's,.*(/lib.*/ld.*.so.*) .*,\1,p'); do
|
|
# check symlink
|
|
if [ -h "$l" ]; then
|
|
# check lib already existence
|
|
if [ ! -e "${tmpdir}/usr/lib/${l##*/}" ] && [ ! -e "${tmpdir}/$(readlink -f $l)" ]; then
|
|
# regular
|
|
install -s -m755 "$(readlink -f $l)" -t "${tmpdir}/usr/lib"
|
|
|
|
# FIXME handle all symlinks
|
|
# symlink may link to symlink
|
|
[ -h "/usr/lib/$(readlink $l)" ] && cp -a "/usr/lib/$(readlink $l)" "${tmpdir}/usr/lib"
|
|
|
|
# symlink
|
|
cp -a "$l" "${tmpdir}/usr/lib"
|
|
fi
|
|
else
|
|
if [ ! -e "${tmpdir}/usr/lib/${l##*/}" ]; then
|
|
install -s -m755 "$l" -t "${tmpdir}/usr/lib"
|
|
fi
|
|
fi
|
|
done
|
|
}
|
|
|
|
install_files() {
|
|
# FIXME eof broken
|
|
# initialize config
|
|
cat <<EOF > "${tmpdir}/config"
|
|
debug="$debug"
|
|
root="$root"
|
|
root_type="$root_type"
|
|
root_args="$root_args"
|
|
devmgr="$devmgr"
|
|
#drivers="$drivers"
|
|
use_lvm="$use_lvm"
|
|
use_luks="$use_luks"
|
|
luks_root="$luks_root"
|
|
luks_header="$luks_header"
|
|
luks_keyfile="$luks_keyfile"
|
|
luks_args="$luks_args"
|
|
EOF
|
|
|
|
# needed for devmgr
|
|
cat <<EOF > "${tmpdir}/etc/group"
|
|
root:x:0:
|
|
tty:x:5:
|
|
dialout:x:11:
|
|
uucp:x:14:
|
|
kmem:x:3:
|
|
input:x:25:
|
|
video:x:13:
|
|
audio:x:12:
|
|
lp:x:10:
|
|
disk:x:9:
|
|
cdrom:x:16:
|
|
tape:x:6:
|
|
kvm:x:24:
|
|
floppy:x:8:
|
|
EOF
|
|
|
|
# needed for devmgr
|
|
cat <<EOF > "${tmpdir}/etc/passwd"
|
|
root:x:0:0::/root:/bin/sh
|
|
nobody:x:99:99::/:/bin/false
|
|
EOF
|
|
|
|
# install init script
|
|
install -m755 ./init -t "$tmpdir"
|
|
}
|
|
|
|
# TODO add more compession tools
|
|
# create and compress cpio archive
|
|
create_initramfs() {
|
|
{
|
|
( cd "$tmpdir" && {
|
|
find . | cpio -oH newc | gzip -9
|
|
} ) > "${script_dir}/initramfs-${kernel}.img.gz"
|
|
} >/dev/null 2>&1
|
|
|
|
[ "$?" = 0 ] || panic "failed to generate initramfs image"
|
|
}
|
|
|
|
# check root
|
|
[ "$(id -u)" = 0 ] || panic "must be run as root"
|
|
|
|
# remove tmpdir on exit or unexpected error
|
|
trap remove_tmpdir EXIT INT
|
|
|
|
check_currentdir
|
|
|
|
# source config
|
|
. ./config || panic "./config doesn't exists"
|
|
|
|
# handle debug mode
|
|
[ "$debug" = 1 ] && {
|
|
# debug shell commands
|
|
set -x
|
|
# don't remove anything
|
|
trap : EXIT INT
|
|
}
|
|
|
|
# variables
|
|
tmpdir="$(mktemp -d /tmp/initramfs.XXXXXXXX)" || panic "failed to create working directory"
|
|
kernel="$(uname -r)"
|
|
moddir="/lib/modules/"
|
|
|
|
check_requirements
|
|
|
|
create_structure
|
|
create_symlinks
|
|
#parse_fstab
|
|
#parse_crypttab
|
|
install_binaries $binaries
|
|
install_drivers
|
|
install_files
|
|
|
|
# handle device manager
|
|
case "$devmgr" in
|
|
mdev) install_mdev ;;
|
|
mdevd) install_mdevd ;;
|
|
udev) install_udev ;;
|
|
*) panic "devmgr option broken" ;;
|
|
esac
|
|
|
|
[ "$use_luks" = 1 ] && install_luks
|
|
[ "$use_lvm" = 1 ] && install_lvm
|
|
|
|
create_initramfs
|
|
|
|
info "done! check out initramfs-${kernel}.img.gz"
|