glibc/elf/ldd.sh.in

#! /bin/sh

# Copyright (C) 1996 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 Library General Public License as
# published by the Free Software Foundation; either version 2 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
# Library General Public License for more details.

# You should have received a copy of the GNU Library General Public
# License along with the GNU C Library; see the file COPYING.LIB.  If not,
# write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.


# 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.

RTLD=@RTLD@

while test $# -gt 0; do
  case "$1" in
  --v*)
    echo 'ldd (GNU libc) @VERSION@
Copyright (C) 1996 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.'
    exit 0 ;;
  --h*)
    echo 'ldd [OPTION]... FILE...
  --help           print this help and exit
  --version        print version information and exit
Report bugs to <bug-glibc@prep.ai.mit.edu>.'
    exit 0 ;;
  --)		# Stop option prcessing.
    shift; break ;;
  *)
    break ;;
  esac
done

case $# in
0)
  echo >&2 "\
ldd: missing file arguments
Try \`ldd --help' for more information."
  exit 1 ;;
1)
  # We don't list the file name when there is only one.
  case "$1" in
  /*) file="$1" ;;
  *) file="./$1" ;;
  esac
  if test ! -f "$file"; then
    echo "${file}: no such file"
  elif ${RTLD} --verify "$file"; then
    LD_TRACE_LOADED_OBJECTS=1 exec ${RTLD} "$file" && exit 1
  else
    echo '	not a dynamic executable'
  fi
  exit ;;
*)
  set -e	# Bail out immediately if ${RTLD} loses on any argument.
  for file; do
    echo "${file}:"
    case "$file" in
    /*) : ;;
    *) file="./$file" ;;
    esac
    if test ! -f "$file"; then
      echo "$file: no such file"
    elif ${RTLD} --verify "$file"; then
      LD_TRACE_LOADED_OBJECTS=1 ${RTLD} "$file"
    else
      echo '	not a dynamic executable'
    fi
  done
esac

exit 0