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#! @BASH@
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# Copyright (C) 1996-2018 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <http://www.gnu.org/licenses/>.
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# This is the `ldd' command, which lists what shared libraries are
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# used by given dynamically-linked executables. It works by invoking the
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# run-time dynamic linker as a command and setting the environment
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# variable LD_TRACE_LOADED_OBJECTS to a non-empty value.
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# We should be able to find the translation right at the beginning.
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TEXTDOMAIN=libc
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TEXTDOMAINDIR=@TEXTDOMAINDIR@
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RTLDLIST=@RTLD@
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warn=
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bind_now=
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verbose=
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while test $# -gt 0; do
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case "$1" in
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--vers | --versi | --versio | --version)
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echo 'ldd @PKGVERSION@@VERSION@'
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printf $"Copyright (C) %s Free Software Foundation, Inc.
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This is free software; see the source for copying conditions. There is NO
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warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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" "2018"
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printf $"Written by %s and %s.
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" "Roland McGrath" "Ulrich Drepper"
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exit 0
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;;
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--h | --he | --hel | --help)
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echo $"Usage: ldd [OPTION]... FILE...
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--help print this help and exit
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--version print version information and exit
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-d, --data-relocs process data relocations
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-r, --function-relocs process data and function relocations
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-u, --unused print unused direct dependencies
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-v, --verbose print all information
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"
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printf $"For bug reporting instructions, please see:\\n%s.\\n" \
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"@REPORT_BUGS_TO@"
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exit 0
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;;
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-d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \
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--data-rel | --data-relo | --data-reloc | --data-relocs)
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warn=yes
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shift
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;;
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-r | --f | --fu | --fun | --func | --funct | --functi | --functio | \
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--function | --function- | --function-r | --function-re | --function-rel | \
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--function-relo | --function-reloc | --function-relocs)
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warn=yes
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bind_now=yes
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shift
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;;
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-v | --verb | --verbo | --verbos | --verbose)
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verbose=yes
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shift
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;;
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-u | --u | --un | --unu | --unus | --unuse | --unused)
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unused=yes
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shift
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;;
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--v | --ve | --ver)
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echo >&2 $"ldd: option \`$1' is ambiguous"
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exit 1
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;;
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--) # Stop option processing.
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shift; break
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;;
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-*)
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echo >&2 'ldd:' $"unrecognized option" "\`$1'"
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echo >&2 $"Try \`ldd --help' for more information."
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exit 1
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;;
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*)
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break
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;;
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esac
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done
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nonelf ()
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{
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# Maybe extra code for non-ELF binaries.
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return 1;
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}
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add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now"
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add_env="$add_env LD_VERBOSE=$verbose"
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if test "$unused" = yes; then
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add_env="$add_env LD_DEBUG=\"$LD_DEBUG${LD_DEBUG:+,}unused\""
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fi
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# The following command substitution is needed to make ldd work in SELinux
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# environments where the RTLD might not have permission to write to the
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# terminal. The extra "x" character prevents the shell from trimming trailing
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# newlines from command substitution results. This function is defined as a
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# subshell compound list (using "(...)") to prevent parameter assignments from
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# affecting the calling shell execution environment.
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try_trace() (
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output=$(eval $add_env '"$@"' 2>&1; rc=$?; printf 'x'; exit $rc)
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rc=$?
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printf '%s' "${output%x}"
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return $rc
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)
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case $# in
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0)
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echo >&2 'ldd:' $"missing file arguments"
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echo >&2 $"Try \`ldd --help' for more information."
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exit 1
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;;
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1)
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single_file=t
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;;
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*)
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single_file=f
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;;
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esac
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result=0
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for file do
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# We don't list the file name when there is only one.
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test $single_file = t || echo "${file}:"
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case $file in
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*/*) :
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;;
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*) file=./$file
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;;
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esac
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if test ! -e "$file"; then
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echo "ldd: ${file}:" $"No such file or directory" >&2
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result=1
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elif test ! -f "$file"; then
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echo "ldd: ${file}:" $"not regular file" >&2
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result=1
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elif test -r "$file"; then
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test -x "$file" || echo 'ldd:' $"\
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warning: you do not have execution permission for" "\`$file'" >&2
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RTLD=
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ret=1
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for rtld in ${RTLDLIST}; do
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if test -x $rtld; then
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verify_out=`${rtld} --verify "$file"`
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ret=$?
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case $ret in
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[02]) RTLD=${rtld}; break;;
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esac
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fi
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done
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case $ret in
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1)
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# This can be a non-ELF binary or no binary at all.
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nonelf "$file" || {
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echo $" not a dynamic executable"
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result=1
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}
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;;
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0|2)
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try_trace "$RTLD" "$file" || result=1
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;;
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*)
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echo 'ldd:' ${RTLD} $"exited with unknown exit code" "($ret)" >&2
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exit 1
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;;
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esac
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else
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echo 'ldd:' $"error: you do not have read permission for" "\`$file'" >&2
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result=1
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fi
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done
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exit $result
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# Local Variables:
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# mode:ksh
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# End:
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