1: #! @BASH@ 2: # Copyright (C) 1996-2004, 2005, 2006, 2007 Free Software Foundation, Inc. 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 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. 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 13: # Lesser General Public License for more details. 14: 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. 19: 20: 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: 26: # We should be able to find the translation right at the beginning. 27: TEXTDOMAIN=libc 28: TEXTDOMAINDIR=@TEXTDOMAINDIR@ 29: 30: RTLDLIST=@RTLD@ 31: warn= 32: bind_now= 33: verbose= 34: 35: while test $# -gt 0; do 36: case "$1" in 37: --vers | --versi | --versio | --version) 38: echo 'ldd (GNU libc) @VERSION@' 39: printf $"Copyright (C) %s Free Software Foundation, Inc. 40: This is free software; see the source for copying conditions. There is NO 41: warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 42: " "2007" 43: printf $"Written by %s and %s. 44: " "Roland McGrath" "Ulrich Drepper" 45: exit 0 46: ;; 47: --h | --he | --hel | --help) 48: echo $"Usage: ldd [OPTION]... FILE... 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 53: -u, --unused print unused direct dependencies 54: -v, --verbose print all information 55: For bug reporting instructions, please see: 56: <http://www.gnu.org/software/libc/bugs.html>." 57: exit 0 58: ;; 59: -d | --d | --da | --dat | --data | --data- | --data-r | --data-re | \ 60: --data-rel | --data-relo | --data-reloc | --data-relocs) 61: warn=yes 62: shift 63: ;; 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) 67: warn=yes 68: bind_now=yes 69: shift 70: ;; 71: -v | --verb | --verbo | --verbos | --verbose) 72: verbose=yes 73: shift 74: ;; 75: -u | --u | --un | --unu | --unus | --unuse | --unused) 76: unused=yes 77: shift 78: ;; 79: --v | --ve | --ver) 80: echo >&2 $"ldd: option \`$1' is ambiguous" 81: exit 1 82: ;; 83: --) # Stop option processing. 84: shift; break 85: ;; 86: -*) 87: echo >&2 'ldd:' $"unrecognized option" "\`$1'" 88: echo >&2 $"Try \`ldd --help' for more information." 89: exit 1 90: ;; 91: *) 92: break 93: ;; 94: esac 95: done 96: 97: nonelf () 98: { 99: # Maybe extra code for non-ELF binaries. 100: return 1; 101: } 102: 103: add_env="LD_TRACE_LOADED_OBJECTS=1 LD_WARN=$warn LD_BIND_NOW=$bind_now" 104: add_env="$add_env LD_VERBOSE=$verbose" 105: if test "$unused" = yes; then 106: add_env="$add_env LD_DEBUG=\"$LD_DEBUG${LD_DEBUG:+,}unused\"" 107: fi 108: 109: # The following use of cat is needed to make ldd work in SELinux 110: # environments where the executed program might not have permissions 111: # to write to the console/tty. But only bash 3.x supports the pipefail 112: # option, and we don't bother to handle the case for older bash versions. 113: if set -o pipefail 2> /dev/null; then 114: try_trace() { 115: eval $add_env '"$@"' | cat 116: } 117: else 118: try_trace() { 119: eval $add_env '"$@"' 120: } 121: fi 122: 123: case $# in 124: 0) 125: echo >&2 'ldd:' $"missing file arguments" 126: echo >&2 $"Try \`ldd --help' for more information." 127: exit 1 128: ;; 129: 1) 130: single_file=t 131: ;; 132: *) 133: single_file=f 134: ;; 135: esac 136: 137: result=0 138: for file do 139: # We don't list the file name when there is only one. 140: test $single_file = t || echo "${file}:" 141: case $file in 142: */*) : 143: ;; 144: *) file=./$file 145: ;; 146: esac 147: if test ! -e "$file"; then 148: echo "ldd: ${file}:" $"No such file or directory" >&2 149: result=1 150: elif test ! -f "$file"; then 151: echo "ldd: ${file}:" $"not regular file" >&2 152: result=1 153: elif test -r "$file"; then 154: test -x "$file" || echo 'ldd:' $"\ 155: warning: you do not have execution permission for" "\`$file'" >&2 156: RTLD= 157: ret=1 158: for rtld in ${RTLDLIST}; do 159: if test -x $rtld; then 160: verify_out=`${rtld} --verify "$file"` 161: ret=$? 162: case $ret in 163: [02]) RTLD=${rtld}; break;; 164: esac 165: fi 166: done 167: case $ret in 168: 0) 169: # If the program exits with exit code 5, it means the process has been 170: # invoked with __libc_enable_secure. Fall back to running it through 171: # the dynamic linker. 172: try_trace "$file" 173: rc=$? 174: if [ $rc = 5 ]; then 175: try_trace "$RTLD" "$file" 176: rc=$? 177: fi 178: [ $rc = 0 ] || result=1 179: ;; 180: 1) 181: # This can be a non-ELF binary or no binary at all. 182: nonelf "$file" || { 183: echo $" not a dynamic executable" 184: result=1 185: } 186: ;; 187: 2) 188: try_trace "$RTLD" "$file" || result=1 189: ;; 190: *) 191: echo 'ldd:' ${RTLD} $"exited with unknown exit code" "($ret)" >&2 192: exit 1 193: ;; 194: esac 195: else 196: echo 'ldd:' $"error: you do not have read permission for" "\`$file'" >&2 197: result=1 198: fi 199: done 200: 201: exit $result 202: # Local Variables: 203: # mode:ksh 204: # End: