source: udev/cdsymlink_helper.sh@ d1fc2f3

#!/bin/sh
########################################################################
#
# Description : cdsymlink_helper.sh
#
# Authors     : Jim Gifford
#
# Version     : 00.00
#
# Notes       :
#
########################################################################

. /lib/udev/helper.functions
. /etc/sysconfig/udev_helper

KERN_NAME="$1"
BUS="$2"
test=0

if [ "$KERN_NAME" = "" ]; then
        mesg Bad invocation: \$1 is not set
        exit 1
fi

if [ "$BUS" = "ide" ]; then
        FILES="`ls /sys/bus/ide/drivers/ide-cdrom | grep '\.' `"
                for file in $FILES; do
                        TEST="`ls /sys/bus/ide/drivers/ide-cdrom/$file | grep -c $KERN_NAME`"
                        if [ "$TEST" = "1" ]; then
                                link="`echo $file | cut -f2 -d.`"
                                while [ $test -lt 1 ] ; do
                                        if [ -e /dev/cdrom$link ]; then
                                                link=$[$link+1]
                                        else
                                                test=1
                                                echo $link
                                        fi
                                done
                        fi
                done
fi

if [ "$BUS" = "scsi" ]; then
        link=$KERN_NAME
                while [ $test -lt 1 ] ; do
                        if [ -e /dev/cdrom$link ]; then
                                link=$[$link+1]
                        else
                                test=1
                                echo $link
                        fi
                done
fi