elf/ldd.bash.in

   1 #! @BASH@
   2
   3 # Copyright (C) 1996, 1997, 1998, 1999 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 # We should be able to find the translation right at the beginning.
  28 TEXTDOMAIN=libc
  29 TEXTDOMAINDIR=@TEXTDOMAINDIR@
  30
  31 RTLDLIST=@RTLD@
  32 warn=
  33 bind_now=
  34 verbose=
  35
  36 while test $# -gt 0; do
  37   case "$1" in
  38   --vers | --versi | --versio | --version)
  39     echo 'ldd (GNU libc) @VERSION@'
  40     echo $"Copyright (C) 1999 Free Software Foundation, Inc.
  41 This is free software; see the source for copying conditions.  There is NO
  42 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  43 Written by Roland McGrath and Ulrich Drepper."
  44     exit 0
  45     ;;
  46   --h | --he | --hel | --help)
  47     echo $"Usage: ldd [OPTION]... FILE...
  48       --help              print this help and exit
  49       --version           print version information and exit
  50   -d, --data-relocs       process data relocations
  51   -r, --function-relocs   process data and function relocations
  52   -v, --verbose           print all information
  53 Report bugs using the \`glibcbug' script to <bugs@gnu.org>."
  54     exit 0
  55     ;;
  56   -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \
  57   --data-rel | --data-relo | --data-reloc | --data-relocs)
  58     warn=yes
  59     shift
  60     ;;
  61   -r | --f | --fu | --fun | --func | --funct | --functi | --functio | \
  62   --function | --function- | --function-r | --function-re | --function-rel | \
  63   --function-relo | --function-reloc | --function-relocs)
  64     warn=yes
  65     bind_now=yes
  66     shift
  67     ;;
  68   -v | --verb | --verbo | --verbos | --verbose)
  69     verbose=yes
  70     shift
  71     ;;
  72   --v | --ve | --ver)
  73     echo >&2 $"ldd: option \`$1' is ambiguous"
  74     exit 1
  75     ;;
  76   --)           # Stop option processing.
  77     shift; break
  78     ;;
  79   -*)
  80     echo >&2 'ldd:' $"unrecognized option" "\`$1'"
  81     echo >&2 $"Try \`ldd --help' for more information."
  82     exit 1
  83     ;;
  84   *)
  85     break
  86     ;;
  87   esac
  88 done
  89
  90 nonelf ()
  91 {
  92   # Maybe extra code for non-ELF binaries.
  93   return 1;
  94 }
  95
  96 add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now"
  97 add_env="$add_env LD_VERBOSE=$verbose"
  98 case $# in
  99 0)
 100   echo >&2 'ldd:' $"missing file arguments"
 101   echo >&2 $"Try \`ldd --help' for more information."
 102   exit 1
 103   ;;
 104 1)
 105   single_file=t
 106   ;;
 107 *)
 108   single_file=f
 109   ;;
 110 esac
 111
 112 result=0
 113 for file do
 114   # We don't list the file name when there is only one.
 115   test $single_file = t || echo "${file}:"
 116   case $file in
 117   */*) :
 118        ;;
 119   *) file=./$file
 120      ;;
 121   esac
 122   if test ! -f "$file"; then
 123     echo "ldd: ${file}:" $"No such file or directory" >&2
 124     result=1
 125   elif test -r "$file"; then
 126     test -x "$file" || echo 'ldd:' $"\
 127 warning: you do not have execution permission for" "\`$file'" >&2
 128     RTLD=
 129     for rtld in ${RTLDLIST}; do
 130       if test -x $rtld; then
 131         verify_out=`${rtld} --verify "$file"`
 132         ret=$?
 133         case $ret in
 134         [02]) RTLD=${rtld}; break;;
 135         esac
 136       fi
 137     done
 138     if test -z "${RTLD}"; then
 139       set ${RTLDLIST}
 140       RTLD=$1
 141       verify_out=`${RTLD} --verify "$file"`
 142       ret=$?
 143     fi
 144     case $ret in
 145     0)
 146       eval $add_env '"$file"' || result=1
 147       ;;
 148     1)
 149       # This can be a non-ELF binary or no binary at all.
 150       nonelf "$file" || {
 151         echo $" not a dynamic executable"
 152         result=1
 153       }
 154       ;;
 155     2)
 156       eval $add_env \${RTLD} '"$file"' || result=1
 157       ;;
 158     *)
 159       echo 'ldd:' ${RTLD} $"exited with unknown exit code" "($ret)" >&2
 160       exit 1
 161       ;;
 162     esac
 163   else
 164     echo 'ldd:' $"error: you do not have read permission for" "\`$file'" >&2
 165     result=1
 166   fi
 167 done
 168
 169 exit $result
 170 # Local Variables:
 171 #  mode:ksh
 172 # End: