#!/bin/sh
#

# crucial mountpoints
mount -t proc none /proc
mount -t sysfs none /sys

ROOT_ON_SQUASHFS=`grep '/dev/root' /proc/mounts | grep -c squashfs`
if [ ${ROOT_ON_SQUASHFS} -ne 0 ]; then
    mount -n tmpfs /var -t tmpfs

    tar cf /tmp/devtmp.tar /dev
    mount dev /dev -t tmpfs
    tar xf /tmp/devtmp.tar && rm -f /tmp/devtmp.tar

    mknod /dev/console c 5 1
    mknod /dev/ttyS0 c 4 64

    mknod /dev/null c 1 3
    mknod /dev/gpio_reset c 10 129

    mknod /dev/zero c 1 5
    mknod /dev/tty c 5 0
    mknod /dev/tty0 c 4 0
    mknod /dev/tty1 c 4 1
    mknod /dev/random c 1 8
    mknod /dev/urandom c 1 9
    mknod /dev/ptmx c 5 2
    mknod /dev/mem c 1 1

    mknod /dev/watchdog c 10 130

    mknod /dev/mtdblock0 b 31 0
    mknod /dev/mtdblock1 b 31 1
    mknod /dev/mtdblock2 b 31 2
    mknod /dev/mtdblock3 b 31 3
    mknod /dev/mtdblock4 b 31 4
    mknod /dev/mtdblock5 b 31 5
    mknod /dev/mtdblock6 b 31 6
    mknod /dev/mtdblock7 b 31 7

    mknod /dev/mtd0 c 90 0
    mknod /dev/mtd1 c 90 2
    mknod /dev/mtd2 c 90 4
    mknod /dev/mtd3 c 90 6
    mknod /dev/mtd4 c 90 8
    mknod /dev/mtd5 c 90 10
    mknod /dev/mtd6 c 90 12
    mknod /dev/mtd7 c 90 14

    mknod /dev/ppp  c 108 0

    mkdir /dev/pts /dev/shm
#    mount -n tmpfs /var -t tmpfs -o size=${FLASH_SIZE}
fi

# rest of the mounts
mount none /dev/pts -t devpts

# setup console, consider using ptmx?
CIN=/dev/console
COUT=/dev/console

exec <$CIN &>$COUT

mkdir -p /var/run /var/tmp /var/log /var/etc /var/etc/persistent/cfg /var/lock

# insert hal module
[ ! -f /lib/modules/*/ubnthal.ko ] || insmod /lib/modules/*/ubnthal.ko

# insert the gpiodev and set the LED
if [ -f /lib/modules/*/gpiodev.ko ] ; then
        insmod /lib/modules/*/gpiodev.ko
        echo -n 20 > /proc/gpio/led_pattern     # boot up blinking
fi

# making sure that critical files are in place, make others as symbolic link
# we need to get /etc/inittab created here
# because we cannot do 'init -q' during rc / init
cp -f /usr/etc/inittab /etc/inittab

mkdir -p /etc/udhcpc
# do not update if exist
for f in passwd group login.defs profile hosts host.conf \
fstab udhcpc/udhcpc udhcpc/udhcpc_ip_only startup.list udhcpc_services; do
        if [ ! -e /etc/$f ]; then
                cp -f /usr/etc/$f /etc/$f
        fi
done

mkdir -p /etc/sysinit/
# make symlinks if do not exist
for f in services protocols shells mime.types ethertypes modules.d rc.d init.d; do
    [ ! -e /etc/$f ] || rm -Rf /etc/$f
    ln -s /usr/etc/$f /etc/$f
done

CFG_SYSTEM="/tmp/system.cfg"
CFG_RUNNING="/tmp/running.cfg"
CFG_DEFAULT="/usr/etc/system.cfg"

# detection + default config
if [ -e /sbin/ubntconf ]; then
        /sbin/ubntconf -i $CFG_DEFAULT
fi

# System configuration
/sbin/cfgmtd -r -p /etc/ -f $CFG_RUNNING
if [ $? -ne 0 ]; then
        /sbin/cfgmtd -r -p /etc/ -t 2 -f $CFG_RUNNING
        if [ $? -ne 0 ]; then
                cp $CFG_DEFAULT $CFG_RUNNING
        fi
fi
sort $CFG_RUNNING > $CFG_SYSTEM
rm $CFG_RUNNING
mkdir -p /var/etc/persistent/cfg

# Kernel tuning
# start the page cache/kmem cache cleanup timer in the kernel
echo 1 > /proc/sys/vm/drop_caches
# when processes uses page-cache more than 30% of system memory,
# lets force them to write
echo 20 > /proc/sys/vm/dirty_ratio
# when the dirty pages cross more than 5% of sys memory,
# kick in the pdflush
echo 5 > /proc/sys/vm/dirty_background_ratio

# Run configuration parser
if [ -e /sbin/ubntconf ]; then
        /sbin/ubntconf
fi
# what this implies is that ubntconf cannot rely on too
# many filesystem assumptions

echo "...running /sbin/init"
exec /sbin/init

echo "INTERNAL ERROR!!! Cannot run /sbin/init."
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