support/scripts/check-host-rpath

   1 #!/usr/bin/env bash
   2
   3 # This script scans $(HOST_DIR)/{bin,sbin} for all ELF files, and checks
   4 # they have an RPATH to $(HOST_DIR)/usr/lib if they need libraries from
   5 # there.
   6
   7 # Override the user's locale so we are sure we can parse the output of
   8 # readelf(1) and file(1)
   9 export LC_ALL=C
  10
  11 main() {
  12     local pkg="${1}"
  13     local hostdir="${2}"
  14     local file ret
  15
  16     # Remove duplicate and trailing '/' for proper match
  17     hostdir="$( sed -r -e 's:/+:/:g; s:/$::;' <<<"${hostdir}" )"
  18
  19     ret=0
  20     while read file; do
  21         elf_needs_rpath "${file}" "${hostdir}" || continue
  22         check_elf_has_rpath "${file}" "${hostdir}" && continue
  23         if [ ${ret} -eq 0 ]; then
  24             ret=1
  25             printf "***\n"
  26             printf "*** ERROR: package %s installs executables without proper RPATH:\n" "${pkg}"
  27         fi
  28         printf "***   %s\n" "${file}"
  29     done < <( find "${hostdir}"/{,usr/}{bin,sbin} -type f -exec file {} + 2>/dev/null \
  30               |sed -r -e '/^([^:]+):.*\<ELF\>.*\<executable\>.*/!d'                \
  31                       -e 's//\1/'                                                  \
  32             )
  33
  34     return ${ret}
  35 }
  36
  37 elf_needs_rpath() {
  38     local file="${1}"
  39     local hostdir="${2}"
  40     local lib
  41
  42     while read lib; do
  43         [ -e "${hostdir}/usr/lib/${lib}" ] && return 0
  44     done < <( readelf -d "${file}"                                         \
  45               |sed -r -e '/^.* \(NEEDED\) .*Shared library: \[(.+)\]$/!d;' \
  46                      -e 's//\1/;'                                          \
  47             )
  48
  49     return 1
  50 }
  51
  52 check_elf_has_rpath() {
  53     local file="${1}"
  54     local hostdir="${2}"
  55     local rpath dir
  56
  57     while read rpath; do
  58         for dir in ${rpath//:/ }; do
  59             # Remove duplicate and trailing '/' for proper match
  60             dir="$( sed -r -e 's:/+:/:g; s:/$::;' <<<"${dir}" )"
  61             [ "${dir}" = "${hostdir}/usr/lib" ] && return 0
  62         done
  63     done < <( readelf -d "${file}"                                              \
  64               |sed -r -e '/.* \(R(UN)?PATH\) +Library r(un)?path: \[(.+)\]$/!d' \
  65                       -e 's//\3/;'                                              \
  66             )
  67
  68     return 1
  69 }
  70
  71 main "${@}"