elf/ldd.sh.in

   1 #! /bin/sh
   2
   3 # Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
   4 # This file is part of the GNU C Library.
   5
   6 # The GNU C Library is free software; you can redistribute it and/or
   7 # modify it under the terms of the GNU Library General Public License as
   8 # published by the Free Software Foundation; either version 2 of the
   9 # License, or (at your option) any later version.
  10
  11 # The GNU C Library is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # Library General Public License for more details.
  15
  16 # You should have received a copy of the GNU Library General Public
  17 # License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18 # write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19 # Boston, MA 02111-1307, USA.
  20
  21
  22 # This is the `ldd' command, which lists what shared libraries are
  23 # used by given dynamically-linked executables.  It works by invoking the
  24 # run-time dynamic linker as a command and setting the environment
  25 # variable LD_TRACE_LOADED_OBJECTS to a non-empty value.
  26
  27 RTLD=@RTLD@
  28 warn=
  29 bind_now=
  30
  31 while test $# -gt 0; do
  32   case "$1" in
  33   --vers | --versi | --versio | --version)
  34     echo 'ldd (GNU libc) @VERSION@
  35 Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
  36 This is free software; see the source for copying conditions.  There is NO
  37 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  38 Written by Roland McGrath and Ulrich Drepper.'
  39     exit 0
  40     ;;
  41   --h | --he | --hel | --help)
  42     echo "ldd [OPTION]... FILE...
  43       --help              print this help and exit
  44       --version           print version information and exit
  45   -d, --data-relocs       process data relocations
  46   -r, --function-relocs   process data and function relocations
  47   -v, --verbose           print all information
  48 Report bugs using the \`glibcbug' script to <bugs@gnu.org>."
  49     exit 0
  50     ;;
  51   -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \
  52   --data-rel | --data-relo | --data-reloc | --data-relocs)
  53     warn=yes
  54     shift
  55     ;;
  56   -r | --f | --fu | --fun | --func | --funct | --functi | --functio | \
  57   --function | --function- | --function-r | --function-re | --function-rel | \
  58   --function-relo | --function-reloc | --function-relocs)
  59     warn=yes
  60     bind_now=yes
  61     shift
  62     ;;
  63   -v | --verb | --verbo | --verbos | --verbose)
  64     verbose=yes
  65     shift
  66     ;;
  67   --v | --ve | --ver)
  68     echo >&2 "ldd: option \`$1' is ambiguous"
  69     exit 1
  70     ;;
  71   --)           # Stop option processing.
  72     shift; break
  73     ;;
  74   -*)
  75     echo >&2 "\
  76 ldd: unrecognized option \`$1'
  77 Try \`ldd --help' for more information."
  78     exit 1
  79     ;;
  80   *)
  81     break
  82     ;;
  83   esac
  84 done
  85
  86 nonelf ()
  87 {
  88   # Maybe extra code for non-ELF binaries.
  89   return 1;
  90 }
  91
  92 add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now"
  93 add_env="$add_env LD_VERBOSE=$verbose"
  94 case $# in
  95 0)
  96   echo >&2 "\
  97 ldd: missing file arguments
  98 Try \`ldd --help' for more information."
  99   exit 1
 100   ;;
 101 1)
 102   # We don't list the file name when there is only one.
 103   case "$1" in
 104   */*) file="$1"
 105        ;;
 106   *) file="./$1"
 107      ;;
 108   esac
 109   if test ! -f "$file"; then
 110     echo "ldd: ${file}: no such file"
 111     exit 1
 112   else
 113     if test -r "$file"; then
 114       test -x "$file" ||
 115         echo "ldd: warning: you do not have execution permission for \`$file'"
 116       verify_out=`${RTLD} --verify "$file"`
 117       case $? in
 118       0)
 119         eval $add_env exec '"$file"' || exit 1
 120         ;;
 121       1)
 122         nonelf $file ||
 123         echo '  not a dynamic executable'
 124         exit 1
 125         ;;
 126       2)
 127         eval $add_env exec \${RTLD} '"$file"' || exit 1
 128         ;;
 129       *)
 130         echo "ldd: ${RTLD} exited with unknown exit code ($?)" >&2
 131         exit 1
 132         ;;
 133       esac
 134     else
 135       echo "ldd: error: you do not have read permission for \`$file'"
 136       exit 1
 137     fi
 138   fi
 139   exit
 140   ;;
 141 *)
 142   set -e        # Bail out immediately if ${RTLD} loses on any argument.
 143   result=0
 144   for file; do
 145     echo "${file}:"
 146     case "$file" in
 147     */*) :
 148          ;;
 149     *) file="./$file"
 150        ;;
 151     esac
 152     if test ! -f "$file"; then
 153       echo "ldd: ${file}: no such file"
 154       result=1
 155     else
 156       if test -r "$file"; then
 157         test -x "$file" || echo "\
 158 ldd: warning: you do not have execution permission for \`$file'"
 159         verify_out=`${RTLD} --verify "$file"`
 160         case $? in
 161         0)
 162           eval $add_env '"$file"' || result=1
 163           ;;
 164         1)
 165           nonelf $file ||
 166           echo '        not a dynamic executable'
 167           result=1
 168           ;;
 169         2)
 170           eval $add_env ${RTLD} '"$file"' || result=1
 171           ;;
 172         *)
 173           echo "ldd: ${RTLD} exited with unknown exit code ($?)" >&2
 174           exit 1
 175           ;;
 176         esac
 177       else
 178         echo "ldd: error: you do not have read permission for \`$file'"
 179         result=1
 180       fi
 181     fi
 182   done
 183 esac
 184
 185 exit $result