S01mountall

#!/bin/bash

test -n "${OS_VERSION}" || source /etc/init.d/base

function mount_fs() {
    msg_begin "Mounting filesystems"
    /bin/mount -T /tmp/fstab.disk -a &&
    /bin/mount -T /tmp/fstab.extra -a &&
    if [[ -r /data/etc/fstab.user ]]; then /bin/mount -T /data/etc/fstab.user -a; fi

    test $? == 0 && msg_done || msg_fail
}

function mount_overlay() {
    modprobe overlay &>/dev/null
    grep -qw overlay /proc/filesystems || return

    msg_begin "Mounting overlay filesystems"
    grep -oE 'lowerdir=[^,]+' /tmp/fstab.overlay | cut -d '=' -f 2 | xargs -r mkdir -p
    grep -oE 'upperdir=[^,]+' /tmp/fstab.overlay | cut -d '=' -f 2 | xargs -r mkdir -p
    grep -oE 'workdir=[^ ]+' /tmp/fstab.overlay | cut -d '=' -f 2 | xargs -r mkdir -p
    cat /tmp/fstab.overlay | grep -vE '^#' | while read line; do
        parts=(${line})
        test ${#parts[@]} -ge 4 || continue
        fs=${parts[0]}
        mp=${parts[1]}
        type=${parts[2]}
        opts=${parts[3]}
        # Add index/metacopy options are only available after kernel 4.19
        if echo -e "$(uname -r)\n4.19.0" | semver-sort | head -n 1 | grep -q 4.19.0; then
            opts+=",index=off,metacopy=off"
        fi
        /bin/mount -t ${type} -o ${opts} ${fs} ${mp}
    done
    test $? == 0 && msg_done || msg_fail
}

function mount_cgroupfs() {
    kernel_maj_ver=$(uname -r | cut -d . -f 1)
    if [[ ${kernel_maj_ver} -ge 5 ]]; then
        /bin/mount -t cgroup2 cgroup2 /sys/fs/cgroup
    else
        /usr/bin/cgroupfs-mount
    fi
}

function install_factory_defaults() {
    if [[ -s /boot/factory-defaults.tar.xz ]]; then
        msg_begin "Installing factory defaults"
        xzcat /boot/factory-defaults.tar.xz  | tar --no-same-owner -mx -C /data
        sync
        msg_done
    fi
}

function remount_rw() {
    msg_begin "Remounting boot partition read-write"
    mount -o remount,rw /boot
    test $? == 0 && msg_done || msg_fail

    msg_begin "Remounting root partition read-write"
    mount -o remount,rw /
    test $? == 0 && msg_done || msg_fail
}

function mk_tty_login() {
    console=$(grep -oE 'console=[a-zA-Z0-9_/-]+' /proc/cmdline | cut -d = -f 2)
    if [[ -z "${console}" ]]; then console=/dev/console; fi
    if ! [[ ${console} == /* ]]; then console=/dev/${console}; fi
    ln -sf ${console} /dev/ttylogin
}

case "$1" in
    start)
        mount_fs
        mount_overlay
        if [[ -f /data/.install_factory_defaults ]]; then
            rm /data/.install_factory_defaults
            install_factory_defaults
        fi
        mount_cgroupfs 2>/dev/null

        # we need to source conf again, now that /data is available
        source /etc/init.d/os_conf
        test "${OS_DEBUG}" == "true" && remount_rw
        mk_tty_login
        ;;

    stop)
        true
        ;;

    *)
        echo "Usage: $0 {start}"
        exit 1
esac

exit $?