buildroot

#!/usr/bin/env bash

​

# This script scans $(HOST_DIR)/{bin,sbin} for all ELF files, and checks

# they have an RPATH to $(HOST_DIR)/usr/lib if they need libraries from

# there.

​

# Override the user's locale so we are sure we can parse the output of

# readelf(1) and file(1)

export LC_ALL=C

​

main() {

    local pkg="${1}"

    local hostdir="${2}"

    local file ret

​

    # Remove duplicate and trailing '/' for proper match

    hostdir="$( sed -r -e 's:/+:/:g; s:/$::;' <<<"${hostdir}" )"

​

    ret=0

    while read file; do

        elf_needs_rpath "${file}" "${hostdir}" || continue

        check_elf_has_rpath "${file}" "${hostdir}" && continue

        if [ ${ret} -eq 0 ]; then

            ret=1

            printf "***\n"

            printf "*** ERROR: package %s installs executables without proper RPATH:\n" "${pkg}"

        fi

        printf "***   %s\n" "${file}"

    done < <( find "${hostdir}"/{,usr/}{bin,sbin} -type f -exec file {} + 2>/dev/null \

              |sed -r -e '/^([^:]+):.*\<ELF\>.*\<executable\>.*/!d'                \

                      -e 's//\1/'                                                  \

            )

​

    return ${ret}

}

​

elf_needs_rpath() {

    local file="${1}"

    local hostdir="${2}"

    local lib

​

    while read lib; do

        [ -e "${hostdir}/usr/lib/${lib}" ] && return 0

    done < <( readelf -d "${file}"                                         \

              |sed -r -e '/^.* \(NEEDED\) .*Shared library: \[(.+)\]$/!d;' \

                     -e 's//\1/;'                                          \

            )

​

    return 1

}

​

check_elf_has_rpath() {

    local file="${1}"

    local hostdir="${2}"

    local rpath dir

​

    while read rpath; do

        for dir in ${rpath//:/ }; do

            # Remove duplicate and trailing '/' for proper match

            dir="$( sed -r -e 's:/+:/:g; s:/$::;' <<<"${dir}" )"

            [ "${dir}" = "${hostdir}/usr/lib" ] && return 0

        done

    done < <( readelf -d "${file}"                                              \