elf/ldd.sh.in

   1 #! /bin/sh
   2
   3 # Copyright (C) 1996, 1997 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   --v | --ve | --ver | --vers | --versi | --versio | --version)
  34     echo 'ldd (GNU libc) @VERSION@
  35 Copyright (C) 1996, 1997 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     exit 0 ;;
  39   --h | --he | --hel | --help)
  40     echo "ldd [OPTION]... FILE...
  41       --help              print this help and exit
  42       --version           print version information and exit
  43   -d, --data-relocs       process data relocations
  44   -r, --function-relocs   process data and function relocations
  45 Report bugs using the \`glibcbug' script to <bugs@gnu.ai.mit.edu>."
  46     exit 0 ;;
  47   -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \
  48   --data-rel | --data-relo | --data-reloc | --data-relocs)
  49     warn=yes
  50     shift ;;
  51   -r | --f | --fu | --fun | --func | --funct | --functi | --functio | \
  52   --function | --function- | --function-r | --function-re | --function-rel | \
  53   --function-relo | --function-reloc | --function-relocs)
  54     warn=yes
  55     bind_now=yes
  56     shift ;;
  57   --)           # Stop option processing.
  58     shift; break ;;
  59   -*)
  60     echo >&2 "\
  61 ldd: unrecognized option \`$1'
  62 Try \`ldd --help' for more information."
  63     exit 1 ;;
  64   *)
  65     break ;;
  66   esac
  67 done
  68
  69 add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now"
  70 case $# in
  71 0)
  72   echo >&2 "\
  73 ldd: missing file arguments
  74 Try \`ldd --help' for more information."
  75   exit 1 ;;
  76 1)
  77   # We don't list the file name when there is only one.
  78   case "$1" in
  79   /*) file="$1" ;;
  80   *) file="./$1" ;;
  81   esac
  82   if test ! -f "$file"; then
  83     echo "ldd: ${file}: no such file"
  84     exit 1
  85   else
  86     if test -r "$file"; then
  87       test -x "$file" ||
  88         echo "ldd: warning: you do not have execution permission for \`$file'"
  89       ${RTLD} --verify "$file"
  90       case $? in
  91       0)
  92         eval $add_env exec '"$file"' || exit 1
  93         ;;
  94       1)
  95         echo '  not a dynamic executable'
  96         exit 1
  97         ;;
  98       2)
  99         eval $add_env exec \${RTLD} '"$file"' || exit 1
 100         ;;
 101       *)
 102         echo "ldd: ${RTLD} exited with unknown exit code ($?)" >&2
 103         exit 1
 104         ;;
 105       esac
 106     else
 107       echo "ldd: error: you do not have read permission for \`$file'"
 108       exit 1
 109     fi
 110   fi
 111   exit ;;
 112 *)
 113   set -e        # Bail out immediately if ${RTLD} loses on any argument.
 114   result=0
 115   for file; do
 116     echo "${file}:"
 117     case "$file" in
 118     /*) : ;;
 119     *) file="./$file" ;;
 120     esac
 121     if test ! -f "$file"; then
 122       echo "ldd: ${file}: no such file"
 123       result=1
 124     else
 125       if test -r "$file"; then
 126         test -x "$file" || echo "\
 127 ldd: warning: you do not have execution permission for \`$file'"
 128         ${RTLD} --verify "$file"
 129         case $? in
 130         0)
 131           eval $add_env '"$file"' || result=1
 132           ;;
 133         1)
 134           echo '        not a dynamic executable'
 135           result=1
 136           ;;
 137         2)
 138           eval $add_env ${RTLD} '"$file"' || result=1
 139           ;;
 140         *)
 141           echo "ldd: ${RTLD} exited with unknown exit code ($?)" >&2
 142           exit 1
 143           ;;
 144         esac
 145       else
 146         echo "ldd: error: you do not have read permission for \`$file'"
 147         result=1
 148       fi
 149     fi
 150   done
 151 esac
 152
 153 exit $result