elf/ldd.bash.in

   1 #! @BASH@
   2 # Copyright (C) 1996-2001, 2002, 2003 Free Software Foundation, Inc.
   3 # This file is part of the GNU C Library.
   4
   5 # The GNU C Library is free software; you can redistribute it and/or
   6 # modify it under the terms of the GNU Lesser General Public
   7 # License as published by the Free Software Foundation; either
   8 # version 2.1 of the License, or (at your option) any later version.
   9
  10 # The GNU C Library is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 # Lesser General Public License for more details.
  14
  15 # You should have received a copy of the GNU Lesser General Public
  16 # License along with the GNU C Library; if not, write to the Free
  17 # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18 # 02111-1307 USA.
  19
  20
  21 # This is the `ldd' command, which lists what shared libraries are
  22 # used by given dynamically-linked executables.  It works by invoking the
  23 # run-time dynamic linker as a command and setting the environment
  24 # variable LD_TRACE_LOADED_OBJECTS to a non-empty value.
  25
  26 # We should be able to find the translation right at the beginning.
  27 TEXTDOMAIN=libc
  28 TEXTDOMAINDIR=@TEXTDOMAINDIR@
  29
  30 RTLDLIST=@RTLD@
  31 warn=
  32 bind_now=
  33 verbose=
  34
  35 while test $# -gt 0; do
  36   case "$1" in
  37   --vers | --versi | --versio | --version)
  38     echo 'ldd (GNU libc) @VERSION@'
  39     echo $"Copyright (C) 2003 Free Software Foundation, Inc.
  40 This is free software; see the source for copying conditions.  There is NO
  41 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  42 Written by Roland McGrath and Ulrich Drepper."
  43     exit 0
  44     ;;
  45   --h | --he | --hel | --help)
  46     echo $"Usage: ldd [OPTION]... FILE...
  47       --help              print this help and exit
  48       --version           print version information and exit
  49   -d, --data-relocs       process data relocations
  50   -r, --function-relocs   process data and function relocations
  51   -v, --verbose           print all information
  52 Report bugs using the \`glibcbug' script to <bugs@gnu.org>."
  53     exit 0
  54     ;;
  55   -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \
  56   --data-rel | --data-relo | --data-reloc | --data-relocs)
  57     warn=yes
  58     shift
  59     ;;
  60   -r | --f | --fu | --fun | --func | --funct | --functi | --functio | \
  61   --function | --function- | --function-r | --function-re | --function-rel | \
  62   --function-relo | --function-reloc | --function-relocs)
  63     warn=yes
  64     bind_now=yes
  65     shift
  66     ;;
  67   -v | --verb | --verbo | --verbos | --verbose)
  68     verbose=yes
  69     shift
  70     ;;
  71   --v | --ve | --ver)
  72     echo >&2 $"ldd: option \`$1' is ambiguous"
  73     exit 1
  74     ;;
  75   --)           # Stop option processing.
  76     shift; break
  77     ;;
  78   -*)
  79     echo >&2 'ldd:' $"unrecognized option" "\`$1'"
  80     echo >&2 $"Try \`ldd --help' for more information."
  81     exit 1
  82     ;;
  83   *)
  84     break
  85     ;;
  86   esac
  87 done
  88
  89 nonelf ()
  90 {
  91   # Maybe extra code for non-ELF binaries.
  92   return 1;
  93 }
  94
  95 add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now"
  96 add_env="$add_env LD_VERBOSE=$verbose"
  97 case $# in
  98 0)
  99   echo >&2 'ldd:' $"missing file arguments"
 100   echo >&2 $"Try \`ldd --help' for more information."
 101   exit 1
 102   ;;
 103 1)
 104   single_file=t
 105   ;;
 106 *)
 107   single_file=f
 108   ;;
 109 esac
 110
 111 result=0
 112 for file do
 113   # We don't list the file name when there is only one.
 114   test $single_file = t || echo "${file}:"
 115   case $file in
 116   */*) :
 117        ;;
 118   *) file=./$file
 119      ;;
 120   esac
 121   if test ! -f "$file"; then
 122     echo "ldd: ${file}:" $"No such file or directory" >&2
 123     result=1
 124   elif test -r "$file"; then
 125     test -x "$file" || echo 'ldd:' $"\
 126 warning: you do not have execution permission for" "\`$file'" >&2
 127     RTLD=
 128     for rtld in ${RTLDLIST}; do
 129       if test -x $rtld; then
 130         verify_out=`${rtld} --verify "$file"`
 131         ret=$?
 132         case $ret in
 133         [02]) RTLD=${rtld}; break;;
 134         esac
 135       fi
 136     done
 137     if test -z "${RTLD}"; then
 138       set ${RTLDLIST}
 139       RTLD=$1
 140       verify_out=`${RTLD} --verify "$file"`
 141       ret=$?
 142     fi
 143     case $ret in
 144     0)
 145       eval $add_env '"$file"' || result=1
 146       ;;
 147     1)
 148       # This can be a non-ELF binary or no binary at all.
 149       nonelf "$file" || {
 150         echo $" not a dynamic executable"
 151         result=1
 152       }
 153       ;;
 154     2)
 155       eval $add_env \${RTLD} '"$file"' || result=1
 156       ;;
 157     *)
 158       echo 'ldd:' ${RTLD} $"exited with unknown exit code" "($ret)" >&2
 159       exit 1
 160       ;;
 161     esac
 162   else
 163     echo 'ldd:' $"error: you do not have read permission for" "\`$file'" >&2
 164     result=1
 165   fi
 166 done
 167
 168 exit $result
 169 # Local Variables:
 170 #  mode:ksh
 171 # End: