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#!/bin/bash
# Init script for build2 buildos.
#
# Loosely based on the one that comes in Debian initrd.img (since we are
# using its kernel image as is).
#
trap "exit 1" ERR
set -o errtrace # Trap in functions.
# Note: diagnostics goes to stdout.
#
function info () { echo "$*"; }
function error () { info "$*"; exit 1; }
export PATH=/sbin:/usr/sbin:/bin:/usr/bin
# One would expect rootflags=size=1g to work but it doesn't (perhaps init
# is expected to interpret it)?
#
mount -o remount,size=1G /
mkdir -p /sys /proc
mount -t sysfs -o nodev,noexec,nosuid sysfs /sys
mount -t proc -o nodev,noexec,nosuid proc /proc
info "init starting up..."
mount -t devtmpfs -o nosuid,mode=0755 udev /dev
mkdir -p /dev/pts
mount -t devpts -o noexec,nosuid,gid=5,mode=0620 devpts /dev/pts || true
mkdir -p /run
mount -t tmpfs -o "noexec,nosuid,size=10%,mode=0755" tmpfs /run
mkdir -p /tmp
mount -t tmpfs -o "nodev,nosuid,size=10%,mode=1777" tmpfs /tmp
# Start udev.
#
# Based on Debian initrd's init-top/udev. Note that we don't stop it at
# at the end of init.
#
info "starting udev..."
if [ -w /sys/kernel/uevent_helper ]; then
echo >/sys/kernel/uevent_helper
fi
SYSTEMD_LOG_LEVEL=info /lib/systemd/systemd-udevd --daemon --resolve-names=never
udevadm trigger --action=add
udevadm settle || true
# Parse command line.
#
cmdline="$(cat /proc/cmdline)"
info "boot cmdline: $cmdline"
sleep 2
# --machine-id
#
#exec /lib/systemd/systemd #</dev/console >/dev/console 2>&1
exec /bin/bash
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