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 RELOCS=
  29
  30 while test $# -gt 0; do
  31   case "$1" in
  32   --v | --ve | --ver | --vers | --versi | --versio | --version)
  33     echo 'ldd (GNU libc) @VERSION@
  34 Copyright (C) 1996, 1997 Free Software Foundation, Inc.
  35 This is free software; see the source for copying conditions.  There is NO
  36 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.'
  37     exit 0 ;;
  38   --h | --he | --hel | --help)
  39     echo "ldd [OPTION]... FILE...
  40       --help              print this help and exit
  41       --version           print version information and exit
  42   -d, --data-relocs       process data relocations
  43   -r, --function-relocs   process data and function relocations
  44 Report bugs using the \`glibcbug' script to <bugs@gnu.ai.mit.edu>."
  45     exit 0 ;;
  46   -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \
  47   --data-rel | --data-relo | --data-reloc | --data-relocs)
  48     RELOCS='--data-relocs'
  49     shift ;;
  50   -r | --f | --fu | --fun | --func | --funct | --functi | --functio | \
  51   --function | --function- | --function-r | --function-re | --function-rel | \
  52   --function-relo | --function-reloc | --function-relocs)
  53     RELOCS='--function-relocs'
  54     shift ;;
  55   --)           # Stop option processing.
  56     shift; break ;;
  57   -*)
  58     echo >&2 "\
  59 ldd: unrecognized option \`$1'
  60 Try \`ldd --help' for more information."
  61     exit 1 ;;
  62   *)
  63     break ;;
  64   esac
  65 done
  66
  67 case $# in
  68 0)
  69   echo >&2 "\
  70 ldd: missing file arguments
  71 Try \`ldd --help' for more information."
  72   exit 1 ;;
  73 1)
  74   # We don't list the file name when there is only one.
  75   case "$1" in
  76   /*) file="$1" ;;
  77   *) file="./$1" ;;
  78   esac
  79   if test ! -f "$file"; then
  80     echo "ldd: ${file}: no such file"
  81     exit 1
  82   else
  83     if test -r "$file"; then
  84       test -x "$file" ||
  85         echo "ldd: warning: you do not have execution permission for \`$file'"
  86       if ${RTLD} --verify "$file"; then
  87         LD_TRACE_LOADED_OBJECTS=1 exec ${RTLD} ${RELOCS} "$file" || exit 1
  88       else
  89         echo '  not a dynamic executable'
  90         exit 1
  91       fi
  92     else
  93       echo "ldd: error: you do not have read permission for \`$file'"
  94       exit 1
  95     fi
  96   fi
  97   exit ;;
  98 *)
  99   set -e        # Bail out immediately if ${RTLD} loses on any argument.
 100   result=0
 101   for file; do
 102     echo "${file}:"
 103     case "$file" in
 104     /*) : ;;
 105     *) file="./$file" ;;
 106     esac
 107     if test ! -f "$file"; then
 108       echo "ldd: ${file}: no such file"
 109       result=1
 110     else
 111       if test -r "$file"; then
 112         test -x "$file" || echo "\
 113 ldd: warning: you do not have execution permission for \`$file'"
 114         if ${RTLD} --verify "$file"; then
 115           LD_TRACE_LOADED_OBJECTS=1 ${RTLD} ${RELOCS} "$file" || result=1
 116         else
 117           echo '        not a dynamic executable'
 118           result=1
 119         fi
 120       else
 121         echo "ldd: error: you do not have read permission for \`$file'"
 122         result=1
 123       fi
 124     fi
 125   done
 126 esac
 127
 128 exit $result