1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
#! @BASH@
# Copyright (C) 1996-2013 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.
" "2013"
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 $ret in
0)
# If the program exits with exit code 5, it means the process has been
# invoked with __libc_enable_secure. Fall back to running it through
# the dynamic linker.
try_trace "$file"
rc=$?
if [ $rc = 5 ]; then
try_trace "$RTLD" "$file"
rc=$?
fi
[ $rc = 0 ] || result=1
;;
1)
# This can be a non-ELF binary or no binary at all.
nonelf "$file" || {
echo $" not a dynamic executable"
result=1
}
;;
2)
try_trace "$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
# Local Variables:
# mode:ksh
# End:
|
