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f0e44959 | 1 | #! @BASH@ |
81fb02b0 | 2 | # Copyright (C) 1996-2011, 2012 Free Software Foundation, Inc. |
84384f5b UD |
3 | # This file is part of the GNU C Library. |
4 | ||
5 | # The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | # modify it under the terms of the GNU Lesser General Public |
7 | # License as published by the Free Software Foundation; either | |
8 | # version 2.1 of the License, or (at your option) any later version. | |
84384f5b UD |
9 | |
10 | # The GNU C Library is distributed in the hope that it will be useful, | |
11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | # Lesser General Public License for more details. |
84384f5b | 14 | |
41bdb6e2 AJ |
15 | # You should have received a copy of the GNU Lesser General Public |
16 | # License along with the GNU C Library; if not, write to the Free | |
17 | # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | # 02111-1307 USA. | |
84384f5b UD |
19 | |
20 | ||
f0e44959 UD |
21 | # This is the `ldd' command, which lists what shared libraries are |
22 | # used by given dynamically-linked executables. It works by invoking the | |
23 | # run-time dynamic linker as a command and setting the environment | |
24 | # variable LD_TRACE_LOADED_OBJECTS to a non-empty value. | |
25 | ||
84384f5b UD |
26 | # We should be able to find the translation right at the beginning. |
27 | TEXTDOMAIN=libc | |
28 | TEXTDOMAINDIR=@TEXTDOMAINDIR@ | |
29 | ||
3a8599b2 | 30 | RTLDLIST=@RTLD@ |
c84142e8 UD |
31 | warn= |
32 | bind_now= | |
ce37fa88 | 33 | verbose= |
f0e44959 UD |
34 | |
35 | while test $# -gt 0; do | |
36 | case "$1" in | |
ce37fa88 | 37 | --vers | --versi | --versio | --version) |
1f205a47 | 38 | echo 'ldd (GNU libc) @VERSION@' |
8e597a18 | 39 | printf $"Copyright (C) %s Free Software Foundation, Inc. |
84384f5b | 40 | This is free software; see the source for copying conditions. There is NO |
ce37fa88 | 41 | warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
81fb02b0 | 42 | " "2012" |
8e597a18 UD |
43 | printf $"Written by %s and %s. |
44 | " "Roland McGrath" "Ulrich Drepper" | |
9eb2730e UD |
45 | exit 0 |
46 | ;; | |
fd26970f | 47 | --h | --he | --hel | --help) |
43fc8f18 | 48 | echo $"Usage: ldd [OPTION]... FILE... |
fd26970f UD |
49 | --help print this help and exit |
50 | --version print version information and exit | |
51 | -d, --data-relocs process data relocations | |
52 | -r, --function-relocs process data and function relocations | |
7a11603d | 53 | -u, --unused print unused direct dependencies |
ce37fa88 | 54 | -v, --verbose print all information |
cbbcaf23 UD |
55 | " |
56 | echo $"For bug reporting instructions, please see: | |
57 | <http://www.gnu.org/software/libc/bugs.html>. | |
58 | " | |
9eb2730e UD |
59 | exit 0 |
60 | ;; | |
fd26970f UD |
61 | -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \ |
62 | --data-rel | --data-relo | --data-reloc | --data-relocs) | |
c84142e8 | 63 | warn=yes |
9eb2730e UD |
64 | shift |
65 | ;; | |
fd26970f UD |
66 | -r | --f | --fu | --fun | --func | --funct | --functi | --functio | \ |
67 | --function | --function- | --function-r | --function-re | --function-rel | \ | |
68 | --function-relo | --function-reloc | --function-relocs) | |
c84142e8 UD |
69 | warn=yes |
70 | bind_now=yes | |
9eb2730e UD |
71 | shift |
72 | ;; | |
ce37fa88 UD |
73 | -v | --verb | --verbo | --verbos | --verbose) |
74 | verbose=yes | |
9eb2730e UD |
75 | shift |
76 | ;; | |
7a11603d UD |
77 | -u | --u | --un | --unu | --unus | --unuse | --unused) |
78 | unused=yes | |
79 | shift | |
366ca3ac | 80 | ;; |
ce37fa88 | 81 | --v | --ve | --ver) |
d705269e | 82 | echo >&2 $"ldd: option \`$1' is ambiguous" |
9eb2730e UD |
83 | exit 1 |
84 | ;; | |
6d52618b | 85 | --) # Stop option processing. |
9eb2730e UD |
86 | shift; break |
87 | ;; | |
fd26970f | 88 | -*) |
51702635 | 89 | echo >&2 'ldd:' $"unrecognized option" "\`$1'" |
fd26970f | 90 | echo >&2 $"Try \`ldd --help' for more information." |
9eb2730e UD |
91 | exit 1 |
92 | ;; | |
f0e44959 | 93 | *) |
9eb2730e UD |
94 | break |
95 | ;; | |
f0e44959 UD |
96 | esac |
97 | done | |
98 | ||
cb343854 UD |
99 | nonelf () |
100 | { | |
101 | # Maybe extra code for non-ELF binaries. | |
102 | return 1; | |
103 | } | |
104 | ||
2f6d1f1b | 105 | add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now" |
ce37fa88 | 106 | add_env="$add_env LD_VERBOSE=$verbose" |
7a11603d | 107 | if test "$unused" = yes; then |
366ca3ac | 108 | add_env="$add_env LD_DEBUG=\"$LD_DEBUG${LD_DEBUG:+,}unused\"" |
7a11603d | 109 | fi |
f57a3c94 RM |
110 | |
111 | # The following use of cat is needed to make ldd work in SELinux | |
112 | # environments where the executed program might not have permissions | |
113 | # to write to the console/tty. But only bash 3.x supports the pipefail | |
114 | # option, and we don't bother to handle the case for older bash versions. | |
115 | if set -o pipefail 2> /dev/null; then | |
116 | try_trace() { | |
117 | eval $add_env '"$@"' | cat | |
118 | } | |
119 | else | |
120 | try_trace() { | |
121 | eval $add_env '"$@"' | |
122 | } | |
123 | fi | |
124 | ||
f0e44959 UD |
125 | case $# in |
126 | 0) | |
51702635 | 127 | echo >&2 'ldd:' $"missing file arguments" |
fd26970f | 128 | echo >&2 $"Try \`ldd --help' for more information." |
9eb2730e UD |
129 | exit 1 |
130 | ;; | |
f0e44959 | 131 | 1) |
ed1ac6a2 UD |
132 | single_file=t |
133 | ;; | |
134 | *) | |
135 | single_file=f | |
136 | ;; | |
137 | esac | |
138 | ||
139 | result=0 | |
140 | for file do | |
f0e44959 | 141 | # We don't list the file name when there is only one. |
ed1ac6a2 UD |
142 | test $single_file = t || echo "${file}:" |
143 | case $file in | |
144 | */*) : | |
9eb2730e | 145 | ;; |
ed1ac6a2 | 146 | *) file=./$file |
9eb2730e | 147 | ;; |
f0e44959 | 148 | esac |
7cd67fd8 | 149 | if test ! -e "$file"; then |
ed1ac6a2 UD |
150 | echo "ldd: ${file}:" $"No such file or directory" >&2 |
151 | result=1 | |
7cd67fd8 UD |
152 | elif test ! -f "$file"; then |
153 | echo "ldd: ${file}:" $"not regular file" >&2 | |
154 | result=1 | |
7cc27f44 | 155 | elif test -r "$file"; then |
ed1ac6a2 | 156 | test -x "$file" || echo 'ldd:' $"\ |
df777c40 | 157 | warning: you do not have execution permission for" "\`$file'" >&2 |
3a8599b2 | 158 | RTLD= |
34e21278 | 159 | ret=1 |
3a8599b2 UD |
160 | for rtld in ${RTLDLIST}; do |
161 | if test -x $rtld; then | |
162 | verify_out=`${rtld} --verify "$file"` | |
561470e0 | 163 | ret=$? |
3a8599b2 UD |
164 | case $ret in |
165 | [02]) RTLD=${rtld}; break;; | |
166 | esac | |
167 | fi | |
168 | done | |
3a8599b2 | 169 | case $ret in |
2f6d1f1b | 170 | 0) |
f57a3c94 RM |
171 | # If the program exits with exit code 5, it means the process has been |
172 | # invoked with __libc_enable_secure. Fall back to running it through | |
173 | # the dynamic linker. | |
174 | try_trace "$file" | |
175 | rc=$? | |
176 | if [ $rc = 5 ]; then | |
177 | try_trace "$RTLD" "$file" | |
178 | rc=$? | |
179 | fi | |
180 | [ $rc = 0 ] || result=1 | |
2f6d1f1b UD |
181 | ;; |
182 | 1) | |
cb343854 | 183 | # This can be a non-ELF binary or no binary at all. |
ed1ac6a2 UD |
184 | nonelf "$file" || { |
185 | echo $" not a dynamic executable" | |
186 | result=1 | |
187 | } | |
2f6d1f1b UD |
188 | ;; |
189 | 2) | |
f57a3c94 | 190 | try_trace "$RTLD" "$file" || result=1 |
2f6d1f1b UD |
191 | ;; |
192 | *) | |
3a8599b2 | 193 | echo 'ldd:' ${RTLD} $"exited with unknown exit code" "($ret)" >&2 |
2f6d1f1b UD |
194 | exit 1 |
195 | ;; | |
196 | esac | |
7cc27f44 | 197 | else |
df777c40 | 198 | echo 'ldd:' $"error: you do not have read permission for" "\`$file'" >&2 |
ed1ac6a2 | 199 | result=1 |
f0e44959 | 200 | fi |
ed1ac6a2 | 201 | done |
f0e44959 | 202 | |
fd26970f | 203 | exit $result |
84384f5b UD |
204 | # Local Variables: |
205 | # mode:ksh | |
206 | # End: |