#!/bin/bash

function createHookHeader(){
    #1 - hook name
    #2 - modificator
    #3 - common path
    if [ ! -e "${3}/tmp" ]; then
        mkdir -p "${3}/tmp"
    fi
    if [ ! -e "${1}" ]; then
        echo "#!/bin/bash" > "${1}"
        chmod 755 "${1}"
    else
        chmod 755 "${1}"
        tmp=`/bin/sed -n '/#\!\/bin\/\(ba\)\?sh/p' "${1}"`
        if [ -z "${tmp}" ];then
            /bin/grep -q "${1}.${2}.bak" "${1}"
            if [ $? = 1 ];then
                mv -f "${1}" "${1}.${2}.bak"
                echo "#!/bin/bash" > "${1}"
                echo "${1}.${2}.bak"' "$@"' >> "${1}"
                chmod 755 "${1}"
                chmod 755 "${1}.${2}.bak"
            fi
        fi
    fi
}

function checkHookString(){
    #1 - hook name
    #2 - pattern string
    #3 - comment srting
    if [ -e "${1}" ];then
        tmp=`cat "${1}" | grep "${2}"`
        if [ -z "${tmp}" ];then
            echo "${1}   #${3}" >> ${1}
        fi
    fi
}

function removeEmptyStringsFromFile(){
    filename="${1}"
    res=`sed -e '/^$/d' "${filename}"`
    echo "${res}" > "${filename}"
}

if [ ! -e "/usr/local/cpanel/cpanel" ]; then
    exit 0
fi

if [ ! -e "/proc/sys/fs/protected_symlinks_allow_gid" ]; then
    exit 0
fi

POSTUPCP="/scripts/postupcp"
TARGET="cloudlinux-linksafe"
COMMON_PATH="/usr/share/${TARGET}/cpanel/hooks"
POSTUPCP_HOOK="${COMMON_PATH}/cloudlinux_linksafe_hook.sh"

createHookHeader "${POSTUPCP}" "${TARGET}" "${COMMON_PATH}"
checkHookString "${POSTUPCP}" "${POSTUPCP_HOOK}" "${TARGET}"
removeEmptyStringsFromFile "$POSTUPCP"

"${POSTUPCP_HOOK}"
