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#!/bin/bash
add_systemd_unit() {
# Add a systemd unit file to the initcpio image. Hard dependencies on binaries
# and other unit files will be discovered and added.
# $1: path to rules file (or name of rules file)
local unit= rule= entry= key= value= binary= dep=
unit=$(PATH=/usr/lib/systemd/system:/lib/systemd/system type -P "$1")
if [[ -z $unit ]]; then
# complain about not found unit file
return 1
fi
add_file "$unit"
while IFS='=' read -r key values; do
read -ra values <<< "$values"
case $key in
Requires|OnFailure)
# only add hard dependencies (not Wants)
map add_systemd_unit "${values[@]}"
;;
Exec*)
# do not add binaries unless they are required,
# strip special executable prefixes
case ${values[0]} in
-*) ;;
!!*) add_binary "${values[0]#!!}" ;;
*) add_binary "${values[0]#[@!:+]}" ;;
esac
;;
esac
done <"$unit"
# preserve reverse soft dependency
for dep in {/usr,}/lib/systemd/system/*.wants/${unit##*/}; do
if [[ -L $dep ]]; then
add_symlink "$dep"
fi
done
# add hard dependencies
if [[ -d $unit.requires ]]; then
for dep in "$unit".requires/*; do
add_systemd_unit ${dep##*/}
done
fi
}
add_systemd_drop_in() {
local unit=$1 dropin_name=$2
mkdir -p "$BUILDROOT/etc/systemd/system/$unit.d"
cat >"$BUILDROOT/etc/systemd/system/$unit.d/$2.conf"
}
build() {
local rules unit
add_binary /usr/bin/kmod /usr/bin/modprobe
add_binary /usr/bin/mount
add_binary /usr/bin/sulogin
add_binary /usr/bin/umount
add_binary /usr/lib/systemd/systemd /init
map add_binary \
/usr/bin/journalctl \
/usr/bin/systemd-tmpfiles \
/usr/lib/systemd/systemd-hibernate-resume \
/usr/lib/systemd/systemd-shutdown \
/usr/lib/systemd/systemd-sulogin-shell \
/usr/lib/systemd/system-generators/systemd-fstab-generator \
/usr/lib/systemd/system-generators/systemd-gpt-auto-generator \
/usr/lib/systemd/system-generators/systemd-hibernate-resume-generator
# udev rules and systemd units
map add_udev_rule "$rules" \
50-udev-default.rules \
60-persistent-storage.rules \
64-btrfs.rules \
80-drivers.rules \
99-systemd.rules
map add_systemd_unit \
initrd-cleanup.service \
initrd-fs.target \
initrd-parse-etc.service \
initrd-root-fs.target \
initrd-root-device.target \
initrd-switch-root.service \
initrd-switch-root.target \
initrd-udevadm-cleanup-db.service \
initrd.target \
kmod-static-nodes.service \
local-fs.target \
local-fs-pre.target \
paths.target \
reboot.target \
slices.target \
sockets.target \
swap.target \
systemd-fsck@.service \
systemd-hibernate-resume@.service \
systemd-journald.service \
systemd-journald-audit.socket \
systemd-journald-dev-log.socket \
systemd-modules-load.service \
systemd-tmpfiles-setup-dev.service \
systemd-udev-trigger.service \
systemd-udevd-control.socket \
systemd-udevd-kernel.socket \
systemd-udevd.service \
timers.target \
rescue.target \
emergency.target
add_symlink "/usr/lib/systemd/system/default.target" "initrd.target"
add_symlink "/usr/lib/systemd/system/ctrl-alt-del.target" "reboot.target"
add_binary "$(readlink -f /usr/lib/libnss_files.so)"
printf '%s\n' >"$BUILDROOT/etc/nsswitch.conf" \
'passwd: files' \
'group: files' \
'shadow: files'
echo "root:x:0:0:root:/root:/bin/sh" >"$BUILDROOT/etc/passwd"
echo 'root:*:::::::' >"$BUILDROOT/etc/shadow"
getent group root audio disk input kmem kvm lp optical render sgx storage tty uucp video | awk -F: ' { print $1 ":x:" $3 ":" }' >"$BUILDROOT/etc/group"
add_dir "/etc/modules-load.d"
(
. "$_f_config"
set -f
printf '%s\n' ${MODULES[@]} >"$BUILDROOT/etc/modules-load.d/MODULES.conf"
)
}
help() {
cat <<HELPEOF
This will install a basic systemd setup in your initramfs, and is meant to
replace the 'base', 'usr', 'udev' and 'resume' hooks. Other hooks with runtime
components will need to be ported, and will not work as intended. You also may
wish to still include the 'base' hook (before this hook) to ensure that a
rescue shell exists on your initramfs.
HELPEOF
}
# vim: set ft=sh ts=4 sw=4 et:
|
