blob: 1807ec7bca01d8b276c965d80a7a6e7ea192906b (
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|
#!/bin/sh
# ---------------------------------------------------------------------------------------------------------------------
# SPDX-License-Identifier: MIT
# ---------------------------------------------------------------------------------------------------------------------
PATH=/sbin:/bin:/usr/sbin:/usr/bin
CONSOLE="/dev/console"
TARGET_ROOT_MOUNT="/target_rootfs"
# LUKS-enabled devices
TARGET_ROOTFS_NAME="rootfs"
TARGET_LOGFS_NAME="logfs"
TARGET_ROOTFS_DEVICE="/dev/mapper/${TARGET_ROOTFS_NAME}"
LOG_FILE="${TARGET_BOOT_MOUNT}/boot.log"
# log <error-level> <msg>
function log {
if [ "$#" -ne "2" ]; then
echo "${FUNCNAME} <error-level> <msg>"
fi
local level="$1";
local msg="$2";
date=`date`;
if [ -n "${SYSTEMD_ENV}" ] && [ "${SYSTEMD_ENV}" -eq "1" ]; then
echo -e "${level} ${msg}"
else
echo -e "# ${date} ${level} ${msg}"
fi
echo "# ${date} ${level} ${msg}" >> ${LOG_FILE}
if [ "${level}" == "error" ]; then
local frame=0
local stacktrace="";
while true; do
stacktrace+=`caller $frame`
if [ "$?" -ne 0 ]; then
break
fi
_ret=$?
stacktrace+=$'\n'
((frame++));
done
stacktrace=`echo ${stacktrace} |cut -f1-2 -d' ' |tr ' ' ':'`
echo "Stacktrace: "
echo "${stacktrace}"
echo "Stacktrace: " >> ${LOG_FILE}
echo "${stacktrace}" >> ${LOG_FILE}
fi;
}
udev_daemon() {
OPTIONS="/sbin/udev/udevd /sbin/udevd /lib/udev/udevd /lib/systemd/systemd-udevd"
for o in $OPTIONS; do
if [ -x "$o" ]; then
echo $o
return 0
fi
done
return 1
}
_UDEV_DAEMON=`udev_daemon`
early_setup() {
mkdir -p /proc
mkdir -p /sys
mount -t proc proc /proc
mount -t sysfs sysfs /sys
mount -n -o mode=0755 -t devtmpfs none /dev
mkdir -p /run
mkdir -p /var/run
$_UDEV_DAEMON --daemon
udevadm trigger --action=add
udevadm settle --timeout=3
return 0
}
read_args() {
for arg in $CMDLINE; do
optarg=`expr "x$arg" : 'x[^=]*=\(.*\)'`
case $arg in
LABEL=*)
label=$optarg
;;
ROOT_PART=*)
ROOT_PART=$optarg
;;
esac
done
}
do_boot() {
echo "Boot procedure ..."
if [ -z "${ROOT_PART}" ]; then
log "error" "ROOT_PART not set"
return 1
fi
# rootfs
sleep 4s
echo -ne "\n\n Open Encrypted root filesystem...\n"
cmd="cryptsetup -v open ${ROOT_PART} ${TARGET_ROOTFS_NAME}"
output=`eval ${cmd}`
ret=$?
if [ ${ret} -ne 0 ]; then
log "error" "failed to open LUKS device ${ROOT_PART} as ${TARGET_ROOTFS_NAME}"
log "error" "${cmd} (${ret}): ${output}"
return 1
fi;
# TODO check filesystems
# Watches the udev event queue, and exits if all current events are handled
udevadm settle --timeout=3
killall "${_UDEV_DAEMON##*/}" 2>/dev/null
cmd="mkdir -p ${TARGET_ROOT_MOUNT}"
output=`eval ${cmd}`
ret=$?
if [ ${ret} -ne 0 ]; then
log "error" "${cmd} (${ret}): ${output}"
return 1
fi;
cmd="mount -t ext4 ${TARGET_ROOTFS_DEVICE} ${TARGET_ROOT_MOUNT}"
output=`eval ${cmd}`
ret=$?
if [ ${ret} -ne 0 ]; then
log "error" "${cmd} (${ret}): ${output}"
return 1
fi;
cd ${TARGET_ROOT_MOUNT}
exec switch_root ${TARGET_ROOT_MOUNT} /sbin/init $CMDLINE
}
do_console() {
echo "Starting console ..."
# get name of active terminal
CONSOLE=`cat /sys/devices/virtual/tty/console/active | cut -d " " -f2`
# run shell on active terminal
setsid sh -c "exec sh </dev/$CONSOLE >/dev/$CONSOLE 2>&1"
}
# Main
early_setup
if [ "$?" -ne "0" ]; then
log "error" "early_setup failed"
do_console
fi;
if [ $# -ne 0 ]; then
CMDLINE="$@"
else
CMDLINE=`cat /proc/cmdline`
fi;
read_args
case $label in
boot)
do_boot
if [ "$?" -ne "0" ]; then
log "error" "boot failed, rebooting in 10 sec"
sleep 10
reboot -f
fi;
;;
console)
do_console
;;
*)
echo "Unrecognized option ${label}"
;;
esac
|
