#!/bin/bash

# runvdr - VDR launcher
#
# runvdr [VDROPTION]...

shopt -s nocasematch nullglob

VDR=/usr/sbin/vdr
PLUGINDIR=/usr/lib/vdr
PLUGINVER=VDR_PLUGIN_VERSION
PLUGINSUF=${PLUGINVER:+.$PLUGINVER}

prog=$(basename $0)
log()
{
    [ -x /usr/bin/logger ] && \
        /usr/bin/logger -s -pdaemon.info -t"$prog" "$1" || echo "INFO: $1"
}

plugconf()
{
    local plugin="$1" PLUGIN_OPTIONS= PLUGIN_ENABLED=
    if [ -e "/etc/sysconfig/vdr-plugins.d/$plugin.conf" ] ; then
        . "/etc/sysconfig/vdr-plugins.d/$plugin.conf"
        case "$PLUGIN_ENABLED" in no|false|0) return ;; esac
    fi
    VDR_OPTIONS[${#VDR_OPTIONS[@]}]=-P
    if [ -z "$PLUGIN_OPTIONS" ] ; then
        VDR_OPTIONS[${#VDR_OPTIONS[@]}]="$plugin"
    else
        VDR_OPTIONS[${#VDR_OPTIONS[@]}]="$plugin $PLUGIN_OPTIONS"
    fi
}

build_cmdline()
{
    local file= plugin= p=
    # Add "priority" plugins.
    for plugin in $VDR_PLUGIN_ORDER ; do
        if [ -e $PLUGINDIR/libvdr-${plugin}.so$PLUGINSUF ] ; then
            plugconf $plugin
        fi
    done
    # Add the rest available.
    for file in $PLUGINDIR/libvdr-*.so$PLUGINSUF ; do
        plugin=$(basename ${file##*/libvdr-} .so$PLUGINSUF)
        for p in $VDR_PLUGIN_ORDER ; do
            if [ "$plugin" = "$p" ] ; then
                # Already added.
                continue 2
            fi
        done
        plugconf "$plugin"
    done
}

reload_dvb()
{
    log "Reloading DVB modules"
    modules=$(/sbin/lsmod | grep ^dvb_core | awk '{ print $4 }' | tr , ' ')
    /sbin/modprobe -r $modules dvb_core
    for module in $modules ; do
        /sbin/modprobe $module
    done
}

rc=
while true ; do

    VDR_OPTIONS=()
    if [ -n "$VDR_INIT" ] ; then
        [ -f /etc/sysconfig/vdr ] && . /etc/sysconfig/vdr
        if [ -n "$DAEMON_COREFILE_LIMIT" ] ; then
            ulimit -S -c $DAEMON_COREFILE_LIMIT >/dev/null 2>&1 && \
                cd ${TMPDIR:-/tmp}
        fi
        export WAKEUP_BEFORE_RECORDING RELOAD_DVB
        build_cmdline
    fi

    $VDR "$@" "${VDR_OPTIONS[@]}"
    rc=$?

    # 137: "kill -KILL" eg in killproc(), others: "man vdr"
    case $rc in
        0|2|137)
            log "VDR exited with status $rc, exiting"
            break
            ;;
        *)
            log "VDR exited with status $rc, attempting restart"
            case $RELOAD_DVB in yes|true|1) reload_dvb ;; esac
            ;;
    esac

done

exit $rc