elf/ldd.bash.in

   1 #! @BASH@
   2 # Copyright (C) 1996-2001, 2002, 2003, 2004 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     printf $"Copyright (C) %s 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 " "2004"
  43     printf $"Written by %s and %s.
  44 " "Roland McGrath" "Ulrich Drepper"
  45     exit 0
  46     ;;
  47   --h | --he | --hel | --help)
  48     echo $"Usage: ldd [OPTION]... FILE...
  49       --help              print this help and exit
  50       --version           print version information and exit
  51   -d, --data-relocs       process data relocations
  52   -r, --function-relocs   process data and function relocations
  53   -v, --verbose           print all information
  54 Report bugs using the \`glibcbug' script to <bugs@gnu.org>."
  55     exit 0
  56     ;;
  57   -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \
  58   --data-rel | --data-relo | --data-reloc | --data-relocs)
  59     warn=yes
  60     shift
  61     ;;
  62   -r | --f | --fu | --fun | --func | --funct | --functi | --functio | \
  63   --function | --function- | --function-r | --function-re | --function-rel | \
  64   --function-relo | --function-reloc | --function-relocs)
  65     warn=yes
  66     bind_now=yes
  67     shift
  68     ;;
  69   -v | --verb | --verbo | --verbos | --verbose)
  70     verbose=yes
  71     shift
  72     ;;
  73   --v | --ve | --ver)
  74     echo >&2 $"ldd: option \`$1' is ambiguous"
  75     exit 1
  76     ;;
  77   --)           # Stop option processing.
  78     shift; break
  79     ;;
  80   -*)
  81     echo >&2 'ldd:' $"unrecognized option" "\`$1'"
  82     echo >&2 $"Try \`ldd --help' for more information."
  83     exit 1
  84     ;;
  85   *)
  86     break
  87     ;;
  88   esac
  89 done
  90
  91 nonelf ()
  92 {
  93   # Maybe extra code for non-ELF binaries.
  94   return 1;
  95 }
  96
  97 add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now"
  98 add_env="$add_env LD_VERBOSE=$verbose"
  99 case $# in
 100 0)
 101   echo >&2 'ldd:' $"missing file arguments"
 102   echo >&2 $"Try \`ldd --help' for more information."
 103   exit 1
 104   ;;
 105 1)
 106   single_file=t
 107   ;;
 108 *)
 109   single_file=f
 110   ;;
 111 esac
 112
 113 result=0
 114 for file do
 115   # We don't list the file name when there is only one.
 116   test $single_file = t || echo "${file}:"
 117   case $file in
 118   */*) :
 119        ;;
 120   *) file=./$file
 121      ;;
 122   esac
 123   if test ! -f "$file"; then
 124     echo "ldd: ${file}:" $"No such file or directory" >&2
 125     result=1
 126   elif test -r "$file"; then
 127     test -x "$file" || echo 'ldd:' $"\
 128 warning: you do not have execution permission for" "\`$file'" >&2
 129     RTLD=
 130     for rtld in ${RTLDLIST}; do
 131       if test -x $rtld; then
 132         verify_out=`${rtld} --verify "$file"`
 133         ret=$?
 134         case $ret in
 135         [02]) RTLD=${rtld}; break;;
 136         esac
 137       fi
 138     done
 139     if test -z "${RTLD}"; then
 140       set ${RTLDLIST}
 141       RTLD=$1
 142       verify_out=`${RTLD} --verify "$file"`
 143       ret=$?
 144     fi
 145     case $ret in
 146     0)
 147       eval $add_env '"$file"' || result=1
 148       ;;
 149     1)
 150       # This can be a non-ELF binary or no binary at all.
 151       nonelf "$file" || {
 152         echo $" not a dynamic executable"
 153         result=1
 154       }
 155       ;;
 156     2)
 157       eval $add_env \${RTLD} '"$file"' || result=1
 158       ;;
 159     *)
 160       echo 'ldd:' ${RTLD} $"exited with unknown exit code" "($ret)" >&2
 161       exit 1
 162       ;;
 163     esac
 164   else
 165     echo 'ldd:' $"error: you do not have read permission for" "\`$file'" >&2
 166     result=1
 167   fi
 168 done
 169
 170 exit $result
 171 # Local Variables:
 172 #  mode:ksh
 173 # End: