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   --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 Written by Roland McGrath and Ulrich Drepper.'
  39     exit 0 ;;
  40   --h | --he | --hel | --help)
  41     echo "ldd [OPTION]... FILE...
  42       --help              print this help and exit
  43       --version           print version information and exit
  44   -d, --data-relocs       process data relocations
  45   -r, --function-relocs   process data and function relocations
  46   -v, --verbose           print all information
  47 Report bugs using the \`glibcbug' script to <bugs@gnu.ai.mit.edu>."
  48     exit 0 ;;
  49   -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \
  50   --data-rel | --data-relo | --data-reloc | --data-relocs)
  51     warn=yes
  52     shift ;;
  53   -r | --f | --fu | --fun | --func | --funct | --functi | --functio | \
  54   --function | --function- | --function-r | --function-re | --function-rel | \
  55   --function-relo | --function-reloc | --function-relocs)
  56     warn=yes
  57     bind_now=yes
  58     shift ;;
  59   -v | --verb | --verbo | --verbos | --verbose)
  60     verbose=yes
  61     shift ;;
  62   --v | --ve | --ver)
  63     echo >&2 "ldd: option \`$1' is ambiguous"
  64     exit 1 ;;
  65   --)           # Stop option processing.
  66     shift; break ;;
  67   -*)
  68     echo >&2 "\
  69 ldd: unrecognized option \`$1'
  70 Try \`ldd --help' for more information."
  71     exit 1 ;;
  72   *)
  73     break ;;
  74   esac
  75 done
  76
  77 add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now"
  78 add_env="$add_env LD_VERBOSE=$verbose"
  79 case $# in
  80 0)
  81   echo >&2 "\
  82 ldd: missing file arguments
  83 Try \`ldd --help' for more information."
  84   exit 1 ;;
  85 1)
  86   # We don't list the file name when there is only one.
  87   case "$1" in
  88   /*) file="$1" ;;
  89   *) file="./$1" ;;
  90   esac
  91   if test ! -f "$file"; then
  92     echo "ldd: ${file}: no such file"
  93     exit 1
  94   else
  95     if test -r "$file"; then
  96       test -x "$file" ||
  97         echo "ldd: warning: you do not have execution permission for \`$file'"
  98       ${RTLD} --verify "$file"
  99       case $? in
 100       0)
 101         eval $add_env exec '"$file"' || exit 1
 102         ;;
 103       1)
 104         echo '  not a dynamic executable'
 105         exit 1
 106         ;;
 107       2)
 108         eval $add_env exec \${RTLD} '"$file"' || exit 1
 109         ;;
 110       *)
 111         echo "ldd: ${RTLD} exited with unknown exit code ($?)" >&2
 112         exit 1
 113         ;;
 114       esac
 115     else
 116       echo "ldd: error: you do not have read permission for \`$file'"
 117       exit 1
 118     fi
 119   fi
 120   exit ;;
 121 *)
 122   set -e        # Bail out immediately if ${RTLD} loses on any argument.
 123   result=0
 124   for file; do
 125     echo "${file}:"
 126     case "$file" in
 127     /*) : ;;
 128     *) file="./$file" ;;
 129     esac
 130     if test ! -f "$file"; then
 131       echo "ldd: ${file}: no such file"
 132       result=1
 133     else
 134       if test -r "$file"; then
 135         test -x "$file" || echo "\
 136 ldd: warning: you do not have execution permission for \`$file'"
 137         ${RTLD} --verify "$file"
 138         case $? in
 139         0)
 140           eval $add_env '"$file"' || result=1
 141           ;;
 142         1)
 143           echo '        not a dynamic executable'
 144           result=1
 145           ;;
 146         2)
 147           eval $add_env ${RTLD} '"$file"' || result=1
 148           ;;
 149         *)
 150           echo "ldd: ${RTLD} exited with unknown exit code ($?)" >&2
 151           exit 1
 152           ;;
 153         esac
 154       else
 155         echo "ldd: error: you do not have read permission for \`$file'"
 156         result=1
 157       fi
 158     fi
 159   done
 160 esac
 161
 162 exit $result