#!/bin/sh
# First argument is the path to the kernel headers.
-KPATH=$1
+KPATH="$1"
-if [ ! -f ${KPATH}/include/generated/uapi/linux/version.h ]; then
+if [ ! -f "${KPATH}/include/generated/uapi/linux/version.h" ]; then
echo 0
exit 0
fi
# Assuming KPATH is the target kernel headers directory
-RHEL_RELEASE=$(sed -rn 's/^#define RHEL_RELEASE "(.*)"/\1/p' ${KPATH}/include/generated/uapi/linux/version.h)
+RHEL_RELEASE=$(sed -rn 's/^#define RHEL_RELEASE "(.*)"/\1/p' "${KPATH}/include/generated/uapi/linux/version.h")
-RHEL_RELEASE_MAJOR=$(echo ${RHEL_RELEASE} | sed -r 's/^([0-9]+)\.([0-9]+)\.([0-9]+)/\1/')
-RHEL_RELEASE_MINOR=$(echo ${RHEL_RELEASE} | sed -r 's/^([0-9]+)\.([0-9]+)\.([0-9]+)/\2/')
-RHEL_RELEASE_PATCH=$(echo ${RHEL_RELEASE} | sed -r 's/^([0-9]+)\.([0-9]+)\.([0-9]+)/\3/')
+RHEL_RELEASE_MAJOR=$(echo "${RHEL_RELEASE}" | sed -r 's/^([0-9]+)\.([0-9]+)\.([0-9]+)/\1/')
+RHEL_RELEASE_MINOR=$(echo "${RHEL_RELEASE}" | sed -r 's/^([0-9]+)\.([0-9]+)\.([0-9]+)/\2/')
+RHEL_RELEASE_PATCH=$(echo "${RHEL_RELEASE}" | sed -r 's/^([0-9]+)\.([0-9]+)\.([0-9]+)/\3/')
# Combine all update numbers into one
RHEL_API_VERSION=$((RHEL_RELEASE_MAJOR * 10000 + RHEL_RELEASE_MINOR * 100 + RHEL_RELEASE_PATCH))