showpci

linux 下的PCI设备枚举源码 此文件非常复杂

print_usage() {
	echo 
	echo "usage: showpci [-l] [-v num] [-d num] [-c num]"
	echo 
}

vendor="vendor="
device="device="
class="class="
detail="detail=0"
vendor_flag=0
device_flag=0
class_flag=0

while getopts ":lv:d:c:" opt;
do
	case $opt in
		"l")	detail=${detail}1
			;;

		"v")	vendor=${vendor}${OPTARG}
			vendor_flag=`expr ${vendor_flag} + 1`
			;;

		"d")	device=${device}${OPTARG}
			device_flag=`expr ${device_flag} + 1`
			;;

		"c")	class=${class}${OPTARG}
			class_flag=`expr ${class_flag} + 1`
			;;

		*)	print_usage
			exit 1
			;;
	esac
done

if [ ${vendor_flag} -eq 0 ]; then
	vendor=${vendor}0
fi

if [ ${device_flag} -eq 0 ]; then
	device=${device}0
fi

if [ ${class_flag} -eq 0 ]; then
	class=${class}0
fi

mod_dir=/lib/modules/my/
mod_name=showpci

if [ -f ${mod_dir}${mod_name}.o ]; then
	/sbin/insmod ${mod_dir}${mod_name}.o ${vendor} ${device} ${class} ${detail}
	if [ $? -eq 0 ]; then
		/sbin/rmmod ${mod_name}
	fi
fi