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Bug#636947: ldd tries to call lddlibc4

* Aurelien Jarno <aurelien@aurel32.net>, 2011-08-07, 16:31:

$ ldd /etc/fstab
/usr/bin/ldd: line 104: lddlibc4: command not found
       not a dynamic executable
It's not something I am able to reproduce, also /usr/bin/ldd shipped with the current libc-bin doesn't have any mention of lddlibc4. 

It does, but oddly enough only on i386.


Could you please:
- send me a copy of your /usr/bin/ldd file
- send me the output of sh -x /usr/bin/ldd /etc/fstab


Both attached.

--
Jakub Wilk

#! /bin/bash
# Copyright (C) 1996-2008, 2009, 2010, 2011 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, 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.

# We should be able to find the translation right at the beginning.
TEXTDOMAIN=libc
TEXTDOMAINDIR=/usr/share/locale

RTLDLIST=/lib/ld-linux.so.2
warn=
bind_now=
verbose=

while test $# -gt 0; do
  case "$1" in
  --vers | --versi | --versio | --version)
    echo 'ldd (Debian EGLIBC 2.13-14) 2.13'
    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.
" "2011"
    printf $"Written by %s and %s.
" "Roland McGrath" "Ulrich Drepper"
    exit 0
    ;;
  --h | --he | --hel | --help)
    printf $"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:
%s.
" "<http://www.debian.org/Bugs/>"
    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.
  file=$1
  # Run the ldd stub.
  lddlibc4 "$file"
  # Test the result.
  if test $? -lt 3; then
    return 0;
  fi
  # In case of an error punt.
  return 1;
}

add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now"
add_env="$add_env LD_LIBRARY_VERSION=\$verify_out"
add_env="$add_env LD_VERBOSE=$verbose"
if test "$unused" = yes; then
  add_env="$add_env LD_DEBUG=\"$LD_DEBUG${LD_DEBUG:+,}unused\""
fi

# The following use of cat is needed to make ldd work in SELinux
# environments where the executed program might not have permissions
# to write to the console/tty.  But only bash 3.x supports the pipefail
# option, and we don't bother to handle the case for older bash versions.
if x=`set -o` && test "$x" != "${x#*pipefail}" && set -o pipefail ; then
  try_trace() {
    eval $add_env '"$@"' | cat
  }
else
  try_trace() {
    eval $add_env '"$@"'
  }
fi

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
    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 $ret in
    0|2)
      try_trace "$RTLD" "$file" || result=1
      ;;
    1|126)
      # This can be a non-ELF binary or no binary at all.
      nonelf "$file" || {
	echo $"	not a dynamic executable"
	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
# Local Variables:
#  mode:ksh
# End:

+ TEXTDOMAIN=libc
+ TEXTDOMAINDIR=/usr/share/locale
+ RTLDLIST=/lib/ld-linux.so.2
+ warn=
+ bind_now=
+ verbose=
+ test 1 -gt 0
+ break
+ add_env=LD_TRACE_LOADED_OBJECTS=1 LD_WARN= LD_BIND_NOW=
+ add_env=LD_TRACE_LOADED_OBJECTS=1 LD_WARN= LD_BIND_NOW= LD_LIBRARY_VERSION=$verify_out
+ add_env=LD_TRACE_LOADED_OBJECTS=1 LD_WARN= LD_BIND_NOW= LD_LIBRARY_VERSION=$verify_out LD_VERBOSE=
+ test  = yes
+ set -o
+ x=Current option settings
errexit         off
noglob          off
ignoreeof       off
interactive     off
monitor         off
noexec          off
stdin           off
xtrace          on
verbose         off
vi              off
emacs           off
noclobber       off
allexport       off
notify          off
nounset         off
nolog           off
debug           off
+ test Current option settings
errexit         off
noglob          off
ignoreeof       off
interactive     off
monitor         off
noexec          off
stdin           off
xtrace          on
verbose         off
vi              off
emacs           off
noclobber       off
allexport       off
notify          off
nounset         off
nolog           off
debug           off != Current option settings
errexit         off
noglob          off
ignoreeof       off
interactive     off
monitor         off
noexec          off
stdin           off
xtrace          on
verbose         off
vi              off
emacs           off
noclobber       off
allexport       off
notify          off
nounset         off
nolog           off
debug           off
+ single_file=t
+ result=0
+ test t = t
+ :
+ test ! -e /etc/fstab
+ test ! -f /etc/fstab
+ test -r /etc/fstab
+ RTLD=
+ ret=1
+ test -x /lib/ld-linux.so.2
+ /lib/ld-linux.so.2 --verify /etc/fstab
+ verify_out=
+ ret=1
+ nonelf /etc/fstab
+ file=/etc/fstab
+ lddlibc4 /etc/fstab
/usr/bin/ldd: 104: /usr/bin/ldd: lddlibc4: not found
+ test 127 -lt 3
+ return 1
+ echo $	not a dynamic executable
+ result=1
+ exit 1
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