#!/bin/sh
# /etc/runit/1 - rawnix system boot

PATH=/sbin:/bin:/usr/sbin:/usr/bin
export PATH

msg() {
    printf '\033[1m%s\033[0m\n' "$1"
}

err() {
    printf '\033[1;31m%s\033[0m\n' "$1" >&2
}

emergency_shell() {
    err "Dropping to emergency shell. Type 'exit' to reboot."
    sulogin -p
    printf '%s\n' "Rebooting..."
    umount -a -r
    mount -o remount,ro /
    reboot -f
    exit 0
}

printf '%s\n' "rawnix is starting..."

msg "Mounting /proc..."
mountpoint -q /proc || mount -t proc proc /proc

msg "Mounting /sys..."
mountpoint -q /sys || mount -t sysfs sysfs /sys

msg "Mounting /run..."
mountpoint -q /run || mount -t tmpfs -o mode=0755,nosuid,nodev tmpfs /run

msg "Mounting /dev..."
if ! mountpoint -q /dev; then
    mount -t devtmpfs -o mode=0755,nosuid devtmpfs /dev
else
    mount -o remount,mode=0755,nosuid devtmpfs /dev
fi

msg "Mounting /dev/pts..."
mkdir -m 755 -p /dev/pts
mountpoint -q /dev/pts || mount -t devpts -o gid=tty,mode=0620,noexec,nosuid devpts /dev/pts

msg "Mounting /dev/shm..."
mkdir -m 1777 -p /dev/shm
mountpoint -q /dev/shm || mount -t tmpfs -o mode=1777,nosuid,nodev tmpfs /dev/shm

msg "Mounting cgroups v2..."
if ! mountpoint -q /sys/fs/cgroup; then
    mount -t cgroup2 none /sys/fs/cgroup 2>/dev/null ||
        err "cgroup2 mount failed - containers will not work"
fi

# Bootstrap udevd for coldplug; sv/udevd takes over in stage 2
msg "Starting udevd..."
if udevd --daemon 2>/dev/null; then
    msg "Triggering udev coldplug..."
    udevadm trigger --type=subsystems --action=add
    udevadm trigger --type=devices --action=add

    msg "Waiting for udev to settle..."
    udevadm settle --timeout=30 || err "Timeout waiting for udev events"
else
    err "udevd not available - continuing without hotplug"
fi

msg "Bringing up loopback..."
ip addr add 127.0.0.1/8 dev lo 2>/dev/null
ip link set lo up 2>/dev/null

# LUKS volumes.  The root volume is not here -- the initramfs opened it
# before this script existed.  These are the extras: /home, data disks.
#
# The file is read on fd 3, not stdin.  With `done < /etc/crypttab` the
# passphrase prompt for a keyless entry reads the *next line of the
# crypttab* instead of the console: the volume fails to open with no
# indication why, and the line it ate is never processed.
if command -v cryptsetup >/dev/null 2>&1 && [ -r /etc/crypttab ]; then
    msg "Opening LUKS volumes..."
    while read -r name device key opts <&3; do
        case "$name" in ''|\#*) continue ;; esac
        case ",$opts," in *,noauto,*) continue ;; esac
        [ -n "$device" ] || { err "crypttab: $name has no device"; continue; }
        [ -e "/dev/mapper/$name" ] && continue

        case "$device" in
            UUID=*|PARTUUID=*|LABEL=*)
                _d=$(blkid -t "$device" -o device 2>/dev/null | head -1)
                [ -n "$_d" ] || { err "crypttab: $name: no device for $device"; continue; }
                device=$_d ;;
        esac

        case "$key" in
            ''|none|-) cryptsetup open "$device" "$name" ;;
            *)         cryptsetup open --key-file "$key" "$device" "$name" ;;
        esac || err "Failed to open LUKS volume: $name"
    done 3< /etc/crypttab
fi

msg "Remounting / read-only..."
mount -o remount,ro /

if [ -f /forcefsck ]; then
    msg "Forced filesystem check..."
    FORCEFSCK="-f"
fi

msg "Checking filesystems..."
fsck $FORCEFSCK -A -T -C -a 2>/dev/null
if [ $? -gt 1 ]; then
    err "Filesystem check failed!"
    err "Please repair manually. Root is mounted read-only."
    err "To remount read-write: mount -n -o remount,rw /"
    emergency_shell
fi

msg "Remounting / read-write..."
mount -o remount,rw /

msg "Seeding urandom..."
if [ -f /var/lib/random/seed ]; then
    cat /var/lib/random/seed >/dev/urandom
    rm -f /var/lib/random/seed
fi

msg "Setting shared mount propagation..."
mount --make-rshared /

msg "Activating swap..."
swapon -a 2>/dev/null

msg "Mounting local filesystems..."
mount -a -O no_netdev 2>/dev/null || emergency_shell

mkdir -m 0755 -p /run/user
mkdir -m 1777 -p /run/lock 
: >/run/utmp

rm -rf /forcefsck /fastboot /etc/nologin /etc/shutdownpid 2>/dev/null
rm -rf /tmp/* /tmp/.* 2>/dev/null

if [ -x /etc/rc.modules ]; then
    msg "Loading kernel modules..."
    /etc/rc.modules
fi

if [ -f /etc/sysctl.conf ]; then
    msg "Setting kernel parameters..."
    sysctl -p >/dev/null 2>&1
fi

if [ -f /etc/hostname ]; then
    msg "Setting hostname: $(cat /etc/hostname)"
    hostname "$(cat /etc/hostname)"
fi

hwclock --hctosys 2>/dev/null

[ -x /etc/rc.local ] && /etc/rc.local

touch /etc/runit/stopit
chmod 100 /etc/runit/stopit
touch /etc/runit/reboot
chmod 100 /etc/runit/reboot

dmesg > /var/log/boot.log 2>/dev/null

msg "Boot complete."
exit 0