emo/tinyramfs
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improve naming

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This commit is contained in:
illiliti 2020-02-14 20:12:45 +03:00
parent 2392ff0752
commit c13fce4843
3 changed files with 86 additions and 88 deletions
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10
config
View File

@ -15,7 +15,7 @@
#compress=""
# parse fstab
#use_fstab=0
#fstab=0
# root fs ( device,partuuid,uuid,label )
root="UUID=07729c48-25d8-4096-acaf-ce5322915680"
@ -30,7 +30,7 @@ root_type="ext4"
# disable this if you want to get rid of util-linux
# NOTE busybox util-linux implemetation doesn't have
# PARTUUID support and proper filesystem type autodetection
use_util_linux=1
util_linux=1
# device manager ( mdev,mdevd,udev )
devmgr="mdev"
@ -45,7 +45,7 @@ hostonly=1
#binaries=""
# LVM support
use_lvm=1
lvm=1
# LVM include config
#lvm_conf=1
@ -54,10 +54,10 @@ use_lvm=1
lvm_discard=1
# LUKS support
use_luks=1
luks=1
# parse crypttab
#use_crypttab=0
#crypttab=0
# LUKS encrypted root ( device,partuuid,uuid,label )
luks_root="PARTUUID=b04395be-f467-458b-8630-9a429b487600"

148
generate
View File

@ -20,39 +20,38 @@ msg() {
esac
}
# create tmpdir
create_tmpdir() {
# create wrkdir
create_wrkdir() {
msg info "creating working directory"
if [ -n "$XDG_CACHE_HOME" ]; then
tmpdir="${XDG_CACHE_HOME}/initramfs.$$"
wrkdir="${XDG_CACHE_HOME}/initramfs.$$"
elif [ -n "$TMPDIR" ]; then
tmpdir="${TMPDIR}/initramfs.$$"
wrkdir="${TMPDIR}/initramfs.$$"
else
tmpdir="/tmp/initramfs.$$"
wrkdir="/tmp/initramfs.$$"
fi
mkdir "$tmpdir" || msg panic "failed to create working directory"
mkdir "$wrkdir" || msg panic "failed to create working directory"
}
# remove tmpdir
remove_tmpdir() {
# remove wrkdir
remove_wrkdir() {
msg info "removing working directory"
rm -rf "$tmpdir"
rm -rf "$wrkdir"
}
# change current directory to script directory if user haven't do it
check_currentdir() {
script_dir=$(dirname "$0")
[ "$PWD" = "$script_dir" ] || {
scriptdir=$(dirname "$0")
[ "$PWD" = "$scriptdir" ] || {
msg info "changing current directory to script directory"
cd "$script_dir" || msg panic "failed to change directory"
cd "$scriptdir" || msg panic "failed to change directory"
}
}
# check needed files
check_requirements() {
msg info "checking requirements"
# check busybox installed
if command -v busybox > /dev/null 2>&1; then
# check busybox supports CONFIG_FEATURE_INSTALLER
@ -75,12 +74,12 @@ check_requirements() {
fi
# check util-linux tools
[ "$use_util_linux" = 1 ] && {
[ "$util_linux" = 1 ] && {
# check mount installed
if command -v mount > /dev/null 2>&1; then
mount --version 2>&1 | grep -q "util-linux" || {
msg warning "util-linux mount version doesn't installed. PARTUUID and filesystem type autodetection support will be missing"
use_util_linux=0
util_linux=0
}
else
msg panic "mount doesn't installed"
@ -90,7 +89,7 @@ check_requirements() {
if command -v blkid > /dev/null 2>&1; then
blkid --version 2>&1 | grep -q "util-linux" || {
msg warning "util-linux blkid version doesn't installed. PARTUUID support will be missing"
use_util_linux=0
util_linux=0
}
else
msg panic "blkid doesn't installed"
@ -101,38 +100,37 @@ check_requirements() {
# install requirements
install_requirements() {
msg info "installing requirements"
# install user specified binaries
[ -n "$binaries" ] && install_binaries $binaries
[ -n "$binaries" ] && install_binary $binaries
# install util-linux binaries
[ "$use_util_linux" = 1 ] && install_binaries mount blkid
[ "$util_linux" = 1 ] && install_binary mount blkid
# install mandatory binaries
install_binaries busybox modprobe
install_binary busybox modprobe
}
# create FHS directory structure
create_structure() {
msg info "creating directory structure"
for dir in dev tmp var run etc usr/lib usr/bin mnt/root proc root sys; do
mkdir -p "${tmpdir}/${dir}"
mkdir -p "${wrkdir}/${dir}"
done
}
# some dynamically linked libraries and binaries compiled with hardcoded
# dependencies path. to make it worked we need create symlinks for them.
# also POSIX ln doesn't have --relative flag like in GNU ln. as workaround
# we change directory to tmpdir and make needed symlinks.
# we change directory to wrkdir and make needed symlinks.
create_symlinks() {
msg info "creating symlinks"
( cd "$tmpdir" && {
( cd "$wrkdir" && {
ln -s usr/lib lib
ln -s usr/lib lib64
ln -s usr/bin bin
ln -s usr/bin sbin
ln -s ../run var/run
cd "${tmpdir}/usr"
cd "${wrkdir}/usr"
ln -s bin sbin
ln -s lib lib64
} )
@ -140,7 +138,7 @@ create_symlinks() {
#parse_fstab() {
# TODO parse fstab
#while [ "$use_fstab" -eq 1 ] && read fs dir type opts; do thing; done < /etc/fstab
#while [ "$fstab" -eq 1 ] && read fs dir type opts; do thing; done < /etc/fstab
#}
#parse_crypttab() {
@ -150,39 +148,39 @@ create_symlinks() {
# install mdev
install_mdev() {
msg info "installing mdev"
install -m644 mdev.conf -t "${tmpdir}/etc"
install -Dm755 storage-device -t "${tmpdir}/lib/mdev"
install -m644 mdev.conf -t "${wrkdir}/etc"
install -Dm755 storage-device -t "${wrkdir}/lib/mdev"
}
# install mdevd
install_mdevd() {
msg info "installing mdevd"
install_binaries mdevd mdevd-coldplug
install -m644 mdev.conf -t "${tmpdir}/etc"
install -Dm755 storage-device -t "${tmpdir}/lib/mdev"
install_binary mdevd mdevd-coldplug
install -m644 mdev.conf -t "${wrkdir}/etc"
install -Dm755 storage-device -t "${wrkdir}/lib/mdev"
}
# install udev
install_udev() {
msg info "installing udev"
install_binaries udevd udevadm dmsetup
install_binary udevd udevadm dmsetup
# FIXME rewrite this piece of crap
find /usr/lib/udev -type f | grep -v "rc_keymaps\|hwdb.d" | cpio -pd "$tmpdir" > /dev/null 2>&1
find /usr/lib/udev -type f | grep -v "rc_keymaps\|hwdb.d" | cpio -pd "$wrkdir" > /dev/null 2>&1
}
# handle lvm
install_lvm() {
msg info "installing LVM"
install_binaries lvm
install_binary lvm
# if hostonly mode enabled install only needed drivers
[ "$hostonly" = 1 ] && install_drivers dm-thin-pool dm-multipath dm-snapshot dm-cache dm-log dm-mirror
[ "$hostonly" = 1 ] && install_driver dm-thin-pool dm-multipath dm-snapshot dm-cache dm-log dm-mirror
if [ "$lvm_conf" = 1 ]; then
install -Dm644 /etc/lvm/*.conf -t "${tmpdir}/etc/lvm" || msg panic "failed to install LVM config"
install -Dm644 /etc/lvm/*.conf -t "${wrkdir}/etc/lvm" || msg panic "failed to install LVM config"
else
mkdir "${tmpdir}/etc/lvm"
cat << EOF > "${tmpdir}/etc/lvm/lvm.conf"
mkdir "${wrkdir}/etc/lvm"
cat << EOF > "${wrkdir}/etc/lvm/lvm.conf"
devices {
issue_discards = ${lvm_discard:-0}
}
@ -197,47 +195,47 @@ EOF
# handle luks
install_luks() {
msg info "installing LUKS"
install_binaries cryptsetup
install_binary cryptsetup
# if hostonly mode enabled install only needed drivers
[ "$hostonly" = 1 ] && install_drivers aes dm-crypt sha256 sha512 wp512 ecb lrw xts twofish serpent
[ "$hostonly" = 1 ] && install_driver aes dm-crypt sha256 sha512 wp512 ecb lrw xts twofish serpent
# avoid locking directory missing warning message
mkdir "${tmpdir}/run/cryptsetup"
mkdir "${wrkdir}/run/cryptsetup"
# TODO get rid of this workaround
# workaround for luks2
install -s -m755 /usr/lib/libgcc_s.so.1 -t "${tmpdir}/usr/lib" || msg panic "failed to install LUKS libraries"
install -s -m755 /usr/lib/libgcc_s.so.1 -t "${wrkdir}/usr/lib" || msg panic "failed to install LUKS libraries"
# block discard support
[ "$luks_discard" = 1 ] && luks_args="--allow-discards $luks_args"
# copy luks header
[ -f "$luks_header" ] && {
install -m400 "$luks_header" "${tmpdir}/root/luks_header" || msg panic "failed to copy LUKS header"
install -m400 "$luks_header" "${wrkdir}/root/luks_header" || msg panic "failed to copy LUKS header"
luks_args="--header=/root/luks_header $luks_args"
}
# copy luks keyfile
[ -f "$luks_keyfile" ] && {
install -m400 "$luks_keyfile" "${tmpdir}/root/luks_keyfile" || msg panic "failed to copy LUKS keyfile"
install -m400 "$luks_keyfile" "${wrkdir}/root/luks_keyfile" || msg panic "failed to copy LUKS keyfile"
luks_args="--key-file=/root/luks_keyfile $luks_args"
}
}
# install drivers and deps
install_drivers() {
install_driver() {
printf "%s\n" "$@" | while read -r driver; do
# strip path and extension
driver="${driver##*/}"
driver="${driver%%.*}"
for driver_dep in $(modprobe -D "$driver" 2> /dev/null | grep -v builtin | cut -d " " -f 2); do
install -Dm644 "$driver_dep" "${tmpdir}${driver_dep}"
install -Dm644 "$driver_dep" "${wrkdir}${driver_dep}"
done
done
# TODO implement monolithic kernel support
[ -e "${tmpdir}/lib/modules" ] || msg panic "failed to install drivers"
[ -e "${wrkdir}/lib/modules" ] || msg panic "failed to install drivers"
}
# install hostonly drivers
@ -246,15 +244,15 @@ install_hostonly_drivers() {
[ -n "$root_type" ] || msg panic "hostonly mode required root_type option to be configured"
# perform autodetection of drivers via /sys
install_drivers $(find /sys -name modalias -exec sort -u "{}" "+")
install_driver $(find /sys -name modalias -exec sort -u "{}" "+")
# TODO autodetect root fs driver
# TODO separate root type option
# install root fs driver
install_drivers "$root_type"
install_driver "$root_type"
# install user specified drivers
[ -n "$drivers" ] && install_drivers "$drivers"
[ -n "$drivers" ] && install_driver "$drivers"
}
# find and install all drivers
@ -262,7 +260,7 @@ install_all_drivers() {
msg info "installing all drivers"
modker="${moddir}/${kernel}/kernel"
install_drivers \
install_driver \
$(find \
"${modker}/arch" \
"${modker}/crypto" \
@ -284,52 +282,52 @@ generate_depmod() {
modker="${moddir}/${kernel}"
# install list of drivers
cp "${modker}/modules.softdep" "${modker}/modules.builtin" "${modker}/modules.order" "${tmpdir}/${modker}"
cp "${modker}/modules.softdep" "${modker}/modules.builtin" "${modker}/modules.order" "${wrkdir}/${modker}"
# generate dependencies list of drivers
depmod -b "$tmpdir" "$kernel"
depmod -b "$wrkdir" "$kernel"
}
# TODO make strip optional
# handle binaries
install_binaries() {
install_binary() {
printf "%s\n" "$@" | while read -r binary; do
msg info "installing binary $binary"
# check binary existence
command -v "$binary" > /dev/null 2>&1 || msg panic "$binary doesn't exists"
# install and strip binary
install -s -m755 "$(command -v $binary)" -t "${tmpdir}/usr/bin"
install -s -m755 "$(command -v $binary)" -t "${wrkdir}/usr/bin"
# check statically linking
ldd "$(command -v $binary)" > /dev/null 2>&1 || continue
# install libraries
install_libraries $binary
install_library $binary
done
}
# TODO make strip optional
# handle libraries
install_libraries() {
install_library() {
for library in $(ldd "$(command -v $1)" | sed -nre 's,.* (/.*lib.*/.*.so.*) .*,\1,p' -e 's,.*(/lib.*/ld.*.so.*) .*,\1,p'); do
# check symlink
if [ -h "$library" ]; then
# check lib already existence
if [ ! -e "${tmpdir}/usr/lib/${library##*/}" ] && [ ! -e "${tmpdir}/$(readlink -f $library)" ]; then
if [ ! -e "${wrkdir}/usr/lib/${library##*/}" ] && [ ! -e "${tmpdir}/$(readlink -f $library)" ]; then
# regular
install -s -m755 "$(readlink -f $library)" -t "${tmpdir}/usr/lib"
install -s -m755 "$(readlink -f $library)" -t "${wrkdir}/usr/lib"
# FIXME handle all symlinks
# symlink may link to symlink
[ -h "/usr/lib/$(readlink $library)" ] && cp -a "/usr/lib/$(readlink $library)" "${tmpdir}/usr/lib"
[ -h "/usr/lib/$(readlink $library)" ] && cp -a "/usr/lib/$(readlink $library)" "${wrkdir}/usr/lib"
# symlink
cp -a "$library" "${tmpdir}/usr/lib"
cp -a "$library" "${wrkdir}/usr/lib"
fi
else
if [ ! -e "${tmpdir}/usr/lib/${library##*/}" ]; then
install -s -m755 "$library" -t "${tmpdir}/usr/lib"
if [ ! -e "${wrkdir}/usr/lib/${library##*/}" ]; then
install -s -m755 "$library" -t "${wrkdir}/usr/lib"
fi
fi
done
@ -340,21 +338,21 @@ install_files() {
msg info "installing files"
# FIXME eof broken
# initialize config
cat << EOF > "${tmpdir}/config"
cat << EOF > "${wrkdir}/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"
lvm="$lvm"
luks="$luks"
luks_root="$luks_root"
luks_args="$luks_args"
EOF
# needed for devmgr
cat << EOF > "${tmpdir}/etc/group"
cat << EOF > "${wrkdir}/etc/group"
root:x:0:
tty:x:5:
dialout:x:11:
@ -372,13 +370,13 @@ floppy:x:8:
EOF
# needed for devmgr
cat << EOF > "${tmpdir}/etc/passwd"
cat << EOF > "${wrkdir}/etc/passwd"
root:x:0:0::/root:/bin/sh
nobody:x:99:99::/:/bin/false
EOF
# install init script
install -m755 ./init -t "$tmpdir"
install -m755 ./init -t "$wrkdir"
}
# TODO add more compession tools
@ -387,22 +385,22 @@ create_initramfs() {
msg info "creating initramfs image"
{
(
cd "$tmpdir"
cd "$wrkdir"
find . \
| cpio -oH newc \
| ${compress:-gzip -9}
) \
| tee "${script_dir}/${initramfs:-initramfs-${kernel}}"
| tee "${scriptdir}/${initramfs:-initramfs-${kernel}}"
} > /dev/null 2>&1 || msg panic "failed to generate initramfs image"
}
# check root
[ "$(id -u)" = 0 ] || msg panic "must be run as root"
create_tmpdir
create_wrkdir
# remove tmpdir on exit or unexpected error
trap remove_tmpdir EXIT INT
# remove wrkdir on exit or unexpected error
trap remove_wrkdir EXIT INT
check_currentdir
@ -444,8 +442,8 @@ case "$devmgr" in
*) msg panic "devmgr option broken" ;;
esac
[ "$use_luks" = 1 ] && install_luks
[ "$use_lvm" = 1 ] && install_lvm
[ "$luks" = 1 ] && install_luks
[ "$lvm" = 1 ] && install_lvm
install_files
create_initramfs

16
init
View File

@ -20,7 +20,7 @@ mnt_pseudofs() {
}
# setup mdev
use_mdev() {
setup_mdev() {
# setup hotplugger
if [ -e /proc/sys/kernel/hotplug ]; then
printf /sbin/mdev > /proc/sys/kernel/hotplug
@ -45,7 +45,7 @@ use_mdev() {
}
# setup mdevd
use_mdevd() {
setup_mdevd() {
# setup daemon
mdevd &
# trigger uevents
@ -53,7 +53,7 @@ use_mdevd() {
}
# setup udev
use_udev() {
setup_udev() {
udevd --daemon
udevadm trigger --action=add --type=subsystems
udevadm trigger --action=add --type=devices
@ -145,15 +145,15 @@ fi
mnt_pseudofs
case "$devmgr" in
mdev) use_mdev ;;
mdevd) use_mdevd ;;
udev) use_udev ;;
mdev) setup_mdev ;;
mdevd) setup_mdevd ;;
udev) setup_udev ;;
*) panic "devmgr option broken" ;;
esac
# TODO handle situations when LUKS on LVM
[ "$use_luks" = 1 ] && unlock_luks
[ "$use_lvm" = 1 ] && trigger_lvm
[ "$luks" = 1 ] && unlock_luks
[ "$lvm" = 1 ] && trigger_lvm
mnt_rootfs
cleanup
boot_system