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5188a9d0 | 1 | #!/bin/bash |
6d7e8eda | 2 | # Copyright (C) 1996-2023 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 | 15 | # You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | # License along with the GNU C Library; if not, see |
5a82c748 | 17 | # <https://www.gnu.org/licenses/>. |
84384f5b UD |
18 | |
19 | ||
f0e44959 UD |
20 | # This is the `ldd' command, which lists what shared libraries are |
21 | # used by given dynamically-linked executables. It works by invoking the | |
22 | # run-time dynamic linker as a command and setting the environment | |
23 | # variable LD_TRACE_LOADED_OBJECTS to a non-empty value. | |
24 | ||
84384f5b UD |
25 | # We should be able to find the translation right at the beginning. |
26 | TEXTDOMAIN=libc | |
27 | TEXTDOMAINDIR=@TEXTDOMAINDIR@ | |
28 | ||
3a8599b2 | 29 | RTLDLIST=@RTLD@ |
c84142e8 UD |
30 | warn= |
31 | bind_now= | |
ce37fa88 | 32 | verbose= |
f0e44959 UD |
33 | |
34 | while test $# -gt 0; do | |
35 | case "$1" in | |
ce37fa88 | 36 | --vers | --versi | --versio | --version) |
8b748aed | 37 | echo 'ldd @PKGVERSION@@VERSION@' |
8e597a18 | 38 | printf $"Copyright (C) %s Free Software Foundation, Inc. |
84384f5b | 39 | This is free software; see the source for copying conditions. There is NO |
ce37fa88 | 40 | warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
634b5eba | 41 | " "2022" |
8e597a18 UD |
42 | printf $"Written by %s and %s. |
43 | " "Roland McGrath" "Ulrich Drepper" | |
9eb2730e UD |
44 | exit 0 |
45 | ;; | |
fd26970f | 46 | --h | --he | --hel | --help) |
43fc8f18 | 47 | echo $"Usage: ldd [OPTION]... FILE... |
fd26970f UD |
48 | --help print this help and exit |
49 | --version print version information and exit | |
50 | -d, --data-relocs process data relocations | |
51 | -r, --function-relocs process data and function relocations | |
7a11603d | 52 | -u, --unused print unused direct dependencies |
ce37fa88 | 53 | -v, --verbose print all information |
cbbcaf23 | 54 | " |
8b748aed JM |
55 | printf $"For bug reporting instructions, please see:\\n%s.\\n" \ |
56 | "@REPORT_BUGS_TO@" | |
9eb2730e UD |
57 | exit 0 |
58 | ;; | |
fd26970f UD |
59 | -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \ |
60 | --data-rel | --data-relo | --data-reloc | --data-relocs) | |
c84142e8 | 61 | warn=yes |
9eb2730e UD |
62 | shift |
63 | ;; | |
fd26970f UD |
64 | -r | --f | --fu | --fun | --func | --funct | --functi | --functio | \ |
65 | --function | --function- | --function-r | --function-re | --function-rel | \ | |
66 | --function-relo | --function-reloc | --function-relocs) | |
c84142e8 UD |
67 | warn=yes |
68 | bind_now=yes | |
9eb2730e UD |
69 | shift |
70 | ;; | |
ce37fa88 UD |
71 | -v | --verb | --verbo | --verbos | --verbose) |
72 | verbose=yes | |
9eb2730e UD |
73 | shift |
74 | ;; | |
7a11603d UD |
75 | -u | --u | --un | --unu | --unus | --unuse | --unused) |
76 | unused=yes | |
77 | shift | |
366ca3ac | 78 | ;; |
ce37fa88 | 79 | --v | --ve | --ver) |
d705269e | 80 | echo >&2 $"ldd: option \`$1' is ambiguous" |
9eb2730e UD |
81 | exit 1 |
82 | ;; | |
6d52618b | 83 | --) # Stop option processing. |
9eb2730e UD |
84 | shift; break |
85 | ;; | |
fd26970f | 86 | -*) |
51702635 | 87 | echo >&2 'ldd:' $"unrecognized option" "\`$1'" |
fd26970f | 88 | echo >&2 $"Try \`ldd --help' for more information." |
9eb2730e UD |
89 | exit 1 |
90 | ;; | |
f0e44959 | 91 | *) |
9eb2730e UD |
92 | break |
93 | ;; | |
f0e44959 UD |
94 | esac |
95 | done | |
96 | ||
cb343854 UD |
97 | nonelf () |
98 | { | |
99 | # Maybe extra code for non-ELF binaries. | |
100 | return 1; | |
101 | } | |
102 | ||
2f6d1f1b | 103 | add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now" |
ce37fa88 | 104 | add_env="$add_env LD_VERBOSE=$verbose" |
7a11603d | 105 | if test "$unused" = yes; then |
366ca3ac | 106 | add_env="$add_env LD_DEBUG=\"$LD_DEBUG${LD_DEBUG:+,}unused\"" |
7a11603d | 107 | fi |
f57a3c94 | 108 | |
94bf958a PM |
109 | # The following command substitution is needed to make ldd work in SELinux |
110 | # environments where the RTLD might not have permission to write to the | |
111 | # terminal. The extra "x" character prevents the shell from trimming trailing | |
112 | # newlines from command substitution results. This function is defined as a | |
113 | # subshell compound list (using "(...)") to prevent parameter assignments from | |
114 | # affecting the calling shell execution environment. | |
115 | try_trace() ( | |
116 | output=$(eval $add_env '"$@"' 2>&1; rc=$?; printf 'x'; exit $rc) | |
117 | rc=$? | |
118 | printf '%s' "${output%x}" | |
119 | return $rc | |
120 | ) | |
f57a3c94 | 121 | |
f0e44959 UD |
122 | case $# in |
123 | 0) | |
51702635 | 124 | echo >&2 'ldd:' $"missing file arguments" |
fd26970f | 125 | echo >&2 $"Try \`ldd --help' for more information." |
9eb2730e UD |
126 | exit 1 |
127 | ;; | |
f0e44959 | 128 | 1) |
ed1ac6a2 UD |
129 | single_file=t |
130 | ;; | |
131 | *) | |
132 | single_file=f | |
133 | ;; | |
134 | esac | |
135 | ||
136 | result=0 | |
137 | for file do | |
f0e44959 | 138 | # We don't list the file name when there is only one. |
ed1ac6a2 UD |
139 | test $single_file = t || echo "${file}:" |
140 | case $file in | |
141 | */*) : | |
9eb2730e | 142 | ;; |
ed1ac6a2 | 143 | *) file=./$file |
9eb2730e | 144 | ;; |
f0e44959 | 145 | esac |
7cd67fd8 | 146 | if test ! -e "$file"; then |
ed1ac6a2 UD |
147 | echo "ldd: ${file}:" $"No such file or directory" >&2 |
148 | result=1 | |
7cd67fd8 UD |
149 | elif test ! -f "$file"; then |
150 | echo "ldd: ${file}:" $"not regular file" >&2 | |
151 | result=1 | |
7cc27f44 | 152 | elif test -r "$file"; then |
ed1ac6a2 | 153 | test -x "$file" || echo 'ldd:' $"\ |
df777c40 | 154 | warning: you do not have execution permission for" "\`$file'" >&2 |
3a8599b2 | 155 | RTLD= |
34e21278 | 156 | ret=1 |
3a8599b2 UD |
157 | for rtld in ${RTLDLIST}; do |
158 | if test -x $rtld; then | |
159 | verify_out=`${rtld} --verify "$file"` | |
561470e0 | 160 | ret=$? |
3a8599b2 UD |
161 | case $ret in |
162 | [02]) RTLD=${rtld}; break;; | |
163 | esac | |
164 | fi | |
165 | done | |
3a8599b2 | 166 | case $ret in |
2f6d1f1b | 167 | 1) |
cb343854 | 168 | # This can be a non-ELF binary or no binary at all. |
ed1ac6a2 | 169 | nonelf "$file" || { |
e7c8ffe4 | 170 | echo $" not a dynamic executable" >&2 |
ed1ac6a2 UD |
171 | result=1 |
172 | } | |
2f6d1f1b | 173 | ;; |
eedca977 | 174 | 0|2) |
f57a3c94 | 175 | try_trace "$RTLD" "$file" || result=1 |
2f6d1f1b UD |
176 | ;; |
177 | *) | |
3a8599b2 | 178 | echo 'ldd:' ${RTLD} $"exited with unknown exit code" "($ret)" >&2 |
2f6d1f1b UD |
179 | exit 1 |
180 | ;; | |
181 | esac | |
7cc27f44 | 182 | else |
df777c40 | 183 | echo 'ldd:' $"error: you do not have read permission for" "\`$file'" >&2 |
ed1ac6a2 | 184 | result=1 |
f0e44959 | 185 | fi |
ed1ac6a2 | 186 | done |
f0e44959 | 187 | |
fd26970f | 188 | exit $result |
84384f5b UD |
189 | # Local Variables: |
190 | # mode:ksh | |
191 | # End: |