#! @BASH@

# Copyright (C) 1996-2018 Free Software Foundation, Inc.

# This file is part of the GNU C Library.

# The GNU C Library is free software; you can redistribute it and/or

# modify it under the terms of the GNU Lesser General Public

# License as published by the Free Software Foundation; either

# version 2.1 of the License, or (at your option) any later version.

# The GNU C Library is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public

# License along with the GNU C Library; if not, see

# <http://www.gnu.org/licenses/>.

# This is the `ldd' command, which lists what shared libraries are

# used by given dynamically-linked executables.  It works by invoking the

# run-time dynamic linker as a command and setting the environment

# variable LD_TRACE_LOADED_OBJECTS to a non-empty value.

# We should be able to find the translation right at the beginning.

TEXTDOMAIN=libc

TEXTDOMAINDIR=@TEXTDOMAINDIR@

RTLDLIST=@RTLD@

warn=

bind_now=

verbose=

while test $# -gt 0; do

  case "$1" in

  --vers | --versi | --versio | --version)

    echo 'ldd @PKGVERSION@@VERSION@'

    printf $"Copyright (C) %s Free Software Foundation, Inc.

This is free software; see the source for copying conditions.  There is NO

warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

" "2018"

    printf $"Written by %s and %s.

" "Roland McGrath" "Ulrich Drepper"

    exit 0

    ;;

  --h | --he | --hel | --help)

    echo $"Usage: ldd [OPTION]... FILE...

      --help              print this help and exit

      --version           print version information and exit

  -d, --data-relocs       process data relocations

  -r, --function-relocs   process data and function relocations

  -u, --unused            print unused direct dependencies

  -v, --verbose           print all information

"

    printf $"For bug reporting instructions, please see:\\n%s.\\n" \

      "@REPORT_BUGS_TO@"

    exit 0

    ;;

  -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \

  --data-rel | --data-relo | --data-reloc | --data-relocs)

    warn=yes

    shift

    ;;

  -r | --f | --fu | --fun | --func | --funct | --functi | --functio | \

  --function | --function- | --function-r | --function-re | --function-rel | \

  --function-relo | --function-reloc | --function-relocs)

    warn=yes

    bind_now=yes

    shift

    ;;

  -v | --verb | --verbo | --verbos | --verbose)

    verbose=yes

    shift

    ;;

  -u | --u | --un | --unu | --unus | --unuse | --unused)

    unused=yes

    shift

    ;;

  --v | --ve | --ver)

    echo >&2 $"ldd: option \`$1' is ambiguous"

    exit 1

    ;;

  --)		# Stop option processing.

    shift; break

    ;;

  -*)

    echo >&2 'ldd:' $"unrecognized option" "\`$1'"

    echo >&2 $"Try \`ldd --help' for more information."

    exit 1

    ;;

  *)

    break

    ;;

  esac

done

nonelf ()

{

  # Maybe extra code for non-ELF binaries.

  return 1;

}

add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now"

add_env="$add_env LD_VERBOSE=$verbose"

if test "$unused" = yes; then

  add_env="$add_env LD_DEBUG=\"$LD_DEBUG${LD_DEBUG:+,}unused\""

fi

# The following command substitution is needed to make ldd work in SELinux

# environments where the RTLD might not have permission to write to the

# terminal.  The extra "x" character prevents the shell from trimming trailing

# newlines from command substitution results.  This function is defined as a

# subshell compound list (using "(...)") to prevent parameter assignments from

# affecting the calling shell execution environment.

try_trace() (

  output=$(eval $add_env '"$@"' 2>&1; rc=$?; printf 'x'; exit $rc)

  rc=$?

  printf '%s' "${output%x}"

  return $rc

)

case $# in

0)

  echo >&2 'ldd:' $"missing file arguments"

  echo >&2 $"Try \`ldd --help' for more information."

  exit 1

  ;;

1)

  single_file=t

  ;;

*)

  single_file=f

  ;;

esac

result=0

for file do

  # We don't list the file name when there is only one.

  test $single_file = t || echo "${file}:"

  case $file in

  */*) :

       ;;

  *) file=./$file

     ;;

  esac

  if test ! -e "$file"; then

    echo "ldd: ${file}:" $"No such file or directory" >&2

    result=1

  elif test ! -f "$file"; then

    echo "ldd: ${file}:" $"not regular file" >&2

    result=1

  elif test -r "$file"; then

    test -x "$file" || echo 'ldd:' $"\

warning: you do not have execution permission for" "\`$file'" >&2

    RTLD=

    ret=1

    for rtld in ${RTLDLIST}; do

      if test -x $rtld; then

	verify_out=`${rtld} --verify "$file"`

	ret=$?

	case $ret in

	[02]) RTLD=${rtld}; break;;

	esac

      fi

    done

    case $ret in

    1)

      # This can be a non-ELF binary or no binary at all.

      nonelf "$file" || {

	echo $"	not a dynamic executable"

	result=1

      }

      ;;

    0|2)

      try_trace "$RTLD" "$file" || result=1

      ;;

    *)

      echo 'ldd:' ${RTLD} $"exited with unknown exit code" "($ret)" >&2

      exit 1

      ;;

    esac

  else

    echo 'ldd:' $"error: you do not have read permission for" "\`$file'" >&2

    result=1

  fi

done

exit $result

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