#!/bin/busybox sh
#----------------------------------------------------------------------------
# /etc/rc - boot script
#
# Creation:     29.03.2000  fm
# Last Update:  $Id$
#
# Copyright (c) 2000-2002 - Frank Meyer
# Copyright (c) 2002-2016 - fli4l-Team <team@fli4l.de>
#----------------------------------------------------------------------------

#----------------------------------------------------------------------------
# stop-function to be used instead of 'exit' to keep error-messages readable
#----------------------------------------------------------------------------
stop()
{
    log_error "$1"
    while true; do
        /bin/sh
    done
}

#----------------------------------------------------------------------------
# read_config <config file> - load configuration from rc.cfg
#----------------------------------------------------------------------------
read_config()
{
    file=$1
    [ -f $file ] || stop "missing config file ('$file')"

    cp $file /tmp/rc.$$
    dtou -s /tmp/rc.$$
    . /tmp/rc.$$                        # get fli4l config
    rm /tmp/rc.$$                       # clean up
}

#----------------------------------------------------------------------------
# exec_scripts <dir> : executes all scripts in directory <dir>
#----------------------------------------------------------------------------
rename_ln()
{
    mv /bin/ln /bin/ln.real
    cat <<-EOF > /bin/ln
        #! /bin/sh
        param="\$*"
        . /etc/boot.d/base-helper
        case \$1 in
            -s) shift ;;
        esac
        case \$2 in
            /*) path=\$2 ;;
            *)  path=\`pwd\`/\$2 ;;
        esac
        case \$path in
            /opt/*)
                SCRIPT=\$script
                log_error "trying to create link in wrong location (ln \$param), please fix this (maybe by removing /opt prefix)."
                ;;
        esac
        busybox ln \$param
EOF
    chmod +x /bin/ln
}

exec_scripts()
{
    dir=$1
    if [ ! -d $dir ]
    then
        log_error "exec_scripts called for non existing directory $dir"
        return
    fi
    rename_ln
    for script in $dir/rc[0-9][0-9][0-9]*.*
    do
        if [ -f $script ]
        then
            echo "script=$script" > /var/run/rc.script
            . $script
        fi
    done
    rm -f /var/run/rc.script
    if [ -f /bin/ln.real ]; then
        mv /bin/ln.real /bin/ln
    fi
}

#-----------------------------------------------------------------------------
# extract_opt [<file> [<target dir>]]
#    - fetch opt.tar from specified location and extract it
#-----------------------------------------------------------------------------
extract_opt() {
    file=$1
    target_dir=$2

    case $COMP_TYPE_OPT in
        bzip2) method="bunzip2 -c" ;;
        lzma) method="unlzma -c" ;;
        xz) method="unxz -c" ;;
        *) method="cat" ;;
    esac

    case x$target_dir in
        x) target_dir=/ ;;
    esac

    case x$file in
        x- | x )
            # file comes from stdin
            file=
            ;;
        *)
            [ -f $file ] || stop "extract_opt: missing file $file"
            ;;
    esac
    log_info "extracting files from opt archive"
    cd $target_dir

    if ! $method $file | tar -xf - --warning=no-timestamp --checkpoint=50 --checkpoint-action=dot
    then
        log_error "extraction failed!"
        stop "either your archives are corrupt or you have run out of memory"
    else
        # --checkpoint-action=dot does not emit a final newline
        echo
    fi
}

do_mknod()
{
    while read name typ major minor
    do
        mknod $tmp/dev/$name $typ $major $minor
    done
}

do_mkdev()
{
    while read name typ major minor first last base
    do
        makedevs $name $typ $major $minor $first $last $base
    done
}

static_devices()
{
    # create devices missed by mdev (see [16829] for
    # complete list)

    cd /dev
    echo "Creating static device nodes..."

    cat <<EOF | do_mknod
fd0 b 2 0
fd0h1440 b 2 40
fd0u1440 b 2 28
fd0u1680 b 2 44
fd0u2880 b 2 32
fd1 b 2 1
fd1h1440 b 2 41
fd1u1440 b 2 29
fd1u1680 b 2 45
fd1u2880 b 2 33
isdninfo c 45 255
lcd c 120 0
sndstat c 14 6
temperature c 10 131
EOF

    cat <<EOF | do_mkdev
ippp    c 45  128 0 15
isdn    c 45  0   0 15
isdnctrl c 45 64  0 15
lp      c 6   0   0 2
ttyI    c 43  0   0 15
ttyp    c 3   0   0 9
EOF
    cd /
}

do_beep()
{
    beep -f750 -l120
}

#----------------------------------------------------------------------------
# main function -- put everything together
#----------------------------------------------------------------------------
PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin:.; export PATH
trap "" 1

#
# setup busybox
#
busybox mount -t proc proc /proc

if busybox grep -q ^/dev/root /proc/mounts
then
    set `busybox grep ^/dev/root /proc/mounts`
    case $3 in
        ext*)
            busybox mount -o remount,rw,noatime /dev/root /
            busybox echo $1 $2 $3 rw >> /etc/fstab
            ;;
    esac
fi
busybox --install

mount -t sysfs  sysfs  /sys
mount -t devpts devpts /dev/pts

# tmpfs is mounted with mode=1777, but e.g. dropbear does not like this
# correct this as early as possible
chmod 0755 /

kernel_version=`cat /proc/version | cut -d' ' -f 3`
set -- `echo $kernel_version | sed -e "s/\([0-9]\+\.[0-9]\+\)\.\([0-9]\+\).*/\1 \2/"`
kernel_major=$1
kernel_minor=$2
echo $kernel_version > /etc/kernel-version
echo $kernel_major   > /etc/kernel-major
echo $kernel_minor   > /etc/kernel-minor

echo "" > /proc/sys/kernel/hotplug
static_devices

# TODO: remove this once commit d1cadce15af85e409b199c541badd5c9b8839aa0
# has been backported to kernels < 3.16
set -- ${kernel_major//./ }
if [ $1 -eq 3 -a $2 -lt 16 ]
then
    cat <<EOF >>/etc/mdev.conf

# capi
capi              0:0 0660 =capi20
capi([0-9]+)      0:0 0660 =capi/%1
EOF
fi

if [ -f /etc/rc.cfg ]; then
   grep -q "^DEBUG_MDEV='yes'" /etc/rc.cfg && > /dev/mdev.log
fi
mdev -s

# wait for the first bunch of devices to be created, otherwise e.g. bootlogd
# may miss the tty device
sleep 2

ln -sf /proc/mounts /etc/mtab

# add alias names to modprobe.conf
[ -f /lib/modules/$kernel_version/modules.alias ] && cat /lib/modules/$kernel_version/modules.alias >> /etc/modprobe.conf

#----------------------------------------------------------------------------
# relocate core dumps
#----------------------------------------------------------------------------
if [ -f /proc/sys/kernel/core_pattern ]; then
    mkdir /var/log/dumps
    chmod 1777 /var/log/dumps
    echo '/var/log/dumps/core.%e' > /proc/sys/kernel/core_pattern
fi

#----------------------------------------------------------------------------
# create marker file if core dumps have been requested
#----------------------------------------------------------------------------
if [ -f /etc/rc.cfg ] && grep -q "^DEBUG_ENABLE_CORE='yes'" /etc/rc.cfg
then
    > /var/run/coredumps.enabled
fi

#-----------------------------------------------------------------------------
# setup boot logging and startup debugging
#-----------------------------------------------------------------------------
[ -x /sbin/bootlogd ] && /sbin/bootlogd -c -l /var/tmp/boot.log

case "$fli4ldebug" in
yes)
    > /var/run/debugging
    set -x
    stack_0='yes'
esac

#----------------------------------------------------------------------------
# initialize some variables
#----------------------------------------------------------------------------
script=rc
export script
booting=yes
extfs=ext4
export booting

# remove stale /files link
rm -f /files
#----------------------------------------------------------------------------
# mount devices, e.g. /proc
#----------------------------------------------------------------------------
cd /        # be in root directory
mount -av   # mount /proc
mount

#----------------------------------------------------------------------------
# check for recover-version activation by kernel APPEND
#----------------------------------------------------------------------------
rc_name=rc.cfg
opt_name=opt.img
case "$fli4l_mode" in
    recover)
        rcfile=rc2.cfg
        opt_archive=opt2.img
        fli4l_ramdisk=yes
        log_info "booting recovery version ..." cy
        ;;
    test)
        rcfile=rc-test.cfg
        opt_archive=opt-test.img
        fli4l_ramdisk=yes
        log_info "booting test version ..." cy
        ;;
    *)
        rcfile=$rc_name
        opt_archive=$opt_name
        fli4l_ramdisk=
        ;;
esac

#----------------------------------------------------------------------------
# ?- == depends on boot method,  !- == mandatory
# ?- load drivers
# ?- mount boot medium
# !- read rc.cfg
# ?- extract/mount opt files
#----------------------------------------------------------------------------
. /etc/boot.d/base-helper

# load speaker module
do_modprobe_if_exists kernel/drivers/input/misc pcspkr

(
    # use separate environment for boot scripts
    if [ -f /etc/rc.cfg ]; then
        read_config /etc/rc.cfg
    else
        log_error "Missing initial boot configuration file /etc/rc.cfg"
    fi

    log_info "running boot scripts"
    exec_scripts /etc/boot.d
    log_info "finished boot scripts"
    echo -e "boot_dev=$boot_dev\nboot_fs=$boot_fs\nhd_data=$hd_data" > /var/run/boot.cfg
    cat /var/run/boot.cfg
)

#-----------------------------------------------------------------------------
# read rc.cfg
#-----------------------------------------------------------------------------
mv -f /etc/rc.cfg /etc/rc.cfg.orig
if [ -f /var/run/$rcfile ]; then
   cp -L /var/run/$rcfile /etc/rc.cfg
else
   cp -L /boot/$rcfile /etc/rc.cfg
fi
read_config /etc/rc.cfg
. /var/run/boot.cfg
grep -q /boot /proc/mounts && umount /boot

#-----------------------------------------------------------------------------
# exec rc scripts
#-----------------------------------------------------------------------------
exec_scripts /etc/rc.d

# wait a bit as pending ip-up scripts are executed now
sleep 15

#-----------------------------------------------------------------------------
# version logging
#-----------------------------------------------------------------------------

log_info "fli4l boot finished - VERSION: `cat /etc/version` KERNEL: `uname -r` ARCH: `uname -m` "
mkdir -p /var/lib/persistent/base
echo "`date '+%Y-%m-%d %T (%Z)'` | boot finished | `cat /etc/version` | `uname -r ` | `uname -m` " >> /var/lib/persistent/base/boot_upd.log

#-----------------------------------------------------------------------------
# stop boot logging
#-----------------------------------------------------------------------------
if [ -x /sbin/bootlogd ]
then
    if [ "$DEBUG_KEEP_BOOTLOGD" != yes ]; then
        # stop bootlog daemon
        log_info "terminating bootlogd to close bootlog ..."
        killall bootlogd
    fi
fi