A simple Python script to dump the shared library dependencies of a given executable file or shared library.
Unlike tools like ldd or nm alone, this script tries to track which specific symbols (e.g. functions) are imported from each shared library file! Internally, the script invokes ldd to detect the required libraries and nm to detect the imported or exported symbols of each file. These information are then combined to build the dependency graph.
This is script requires Python 3.7+ and was written for Linux and ✱BSD platforms. No non-standard Python packages are required. It is assumed that the standard command-line tools file, ldd and nm are available.
This script is used as follows:
python3 /path/to/dependencies.py [OPTIONS] input [input ...]
positional arguments:
input The input file(s) to be processed
options:
-h, --help show this help message and exit
-r, --recursive Recursively analyze shared library dependencies
-j, --json-format Generate JSON compatible output
-t, --print-types Output the type of each resolved symbol
-v, --version Print the script version
--no-preload Ignore pre-loaded libraries (only relevant with --recursive)
--no-filter Do not ignore "weak" unresolved symbols
--keep-going Keep going, even when an error is encountered
--indent INDENT Set number of spaces to use for indentation (default: 3)
The first column (no indentation) shows the binary, i.e. executable file or shared library, whose dependencies are being analyzed. The second column (first level of indentation) shows the "soname" and the resolved path of each shared library that the current binary (column #1) depends on. Finally, the third column (second level of indentation) shows the individual symbols that are imported by the current binary (column #1) from the current shared library (column #2). Symbols that need to be imported by the binary but that could not be traced back to one of the required shared libraries, if any, are shown under the unresolved symbols label.
Note: By default, only direct dependencies are tracked. Use the --recursive option to enable recursive mode! This will automatically analyze the dependencies of each required shared library that has been found.
In this example, the dependencies of the /usr/bin/pandoc program are dumped (output was shortened):
$ ./dependencies -rt /usr/bin/pandoc
/usr/bin/pandoc
libm.so.6 => /usr/lib/x86_64-linux-gnu/libm.so.6
acos@GLIBC_2.2.5 [W]
acosf@GLIBC_2.2.5 [W]
acosh@GLIBC_2.2.5 [W]
...
tanf@GLIBC_2.2.5 [W]
tanh@GLIBC_2.2.5 [W]
tanhf@GLIBC_2.2.5 [W]
libz.so.1 => /usr/lib/x86_64-linux-gnu/libz.so.1.2.11
adler32 [T]
crc32 [T]
deflate [T]
...
inflateReset [T]
inflateSetDictionary [T]
zlibVersion [T]
libpcre.so.3 => /usr/lib/x86_64-linux-gnu/libpcre.so.3.13.3
pcre_compile [T]
pcre_config [T]
pcre_exec [T]
pcre_fullinfo [T]
pcre_version [T]
libcmark-gfm.so.0.29.0.gfm.3 => /usr/lib/x86_64-linux-gnu/libcmark-gfm.so.0.29.0.gfm.3
cmark_find_syntax_extension [T]
cmark_get_default_mem_allocator [T]
cmark_llist_append [T]
...
cmark_render_latex [T]
cmark_render_man [T]
cmark_render_xml [T]
libcmark-gfm-extensions.so.0.29.0.gfm.3 => /usr/lib/x86_64-linux-gnu/libcmark-gfm-extensions.so.0.29.0.gfm.3
cmark_gfm_core_extensions_ensure_registered [T]
cmark_gfm_extensions_get_table_alignments [T]
cmark_gfm_extensions_get_table_columns [T]
libgmp.so.10 => /usr/lib/x86_64-linux-gnu/libgmp.so.10.4.1
__gmpn_add [T]
__gmpn_add_1 [T]
__gmpn_and_n [T]
...
__gmpz_powm_sec [T]
__gmpz_probab_prime_p [T]
__gmpz_sizeinbase [T]
libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6
__assert_fail@GLIBC_2.2.5 [T]
__ctype_b_loc@GLIBC_2.3 [T]
__ctype_tolower_loc@GLIBC_2.3 [T]
...
waitpid@GLIBC_2.2.5 [W]
write@GLIBC_2.2.5 [W]
writev@GLIBC_2.2.5 [W]
libffi.so.8 => /usr/lib/x86_64-linux-gnu/libffi.so.8.1.0
ffi_call@LIBFFI_BASE_8.0 [T]
ffi_closure_alloc@LIBFFI_CLOSURE_8.0 [T]
ffi_closure_free@LIBFFI_CLOSURE_8.0 [T]
...
ffi_type_uint64@LIBFFI_BASE_8.0 [R]
ffi_type_uint8@LIBFFI_BASE_8.0 [R]
ffi_type_void@LIBFFI_BASE_8.0 [R]
/usr/lib/x86_64-linux-gnu/libm.so.6
libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6
__assert_fail@GLIBC_2.2.5 [T]
__cxa_finalize@GLIBC_2.2.5 [T]
__stack_chk_fail@GLIBC_2.4 [T]
...
fwrite@GLIBC_2.2.5 [W]
qsort@GLIBC_2.2.5 [T]
stderr@GLIBC_2.2.5 [D]
ld-linux-x86-64.so.2 => /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2
_rtld_global_ro@GLIBC_PRIVATE [D]
/usr/lib/x86_64-linux-gnu/libz.so.1.2.11
libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6
__cxa_finalize@GLIBC_2.2.5 [T]
__errno_location@GLIBC_2.2.5 [T]
__snprintf_chk@GLIBC_2.3.4 [T]
...
strerror@GLIBC_2.2.5 [T]
strlen@GLIBC_2.2.5 [i]
write@GLIBC_2.2.5 [W]
/usr/lib/x86_64-linux-gnu/libpcre.so.3.13.3
libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6
__ctype_b_loc@GLIBC_2.3 [T]
__ctype_tolower_loc@GLIBC_2.3 [T]
__ctype_toupper_loc@GLIBC_2.3 [T]
...
strlen@GLIBC_2.2.5 [i]
strncmp@GLIBC_2.2.5 [i]
sysconf@GLIBC_2.2.5 [W]
/usr/lib/x86_64-linux-gnu/libcmark-gfm.so.0.29.0.gfm.3
libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6
__assert_fail@GLIBC_2.2.5 [T]
__cxa_finalize@GLIBC_2.2.5 [T]
__fprintf_chk@GLIBC_2.3.4 [T]
...
strcpy@GLIBC_2.2.5 [i]
strlen@GLIBC_2.2.5 [i]
strncmp@GLIBC_2.2.5 [i]
/usr/lib/x86_64-linux-gnu/libcmark-gfm-extensions.so.0.29.0.gfm.3
libcmark-gfm.so.0.29.0.gfm.3 => /usr/lib/x86_64-linux-gnu/libcmark-gfm.so.0.29.0.gfm.3
cmark_arena_pop [T]
cmark_arena_push [T]
cmark_consolidate_text_nodes [T]
...
cmark_utf8proc_is_punctuation [T]
cmark_utf8proc_is_space [T]
cmark_utf8proc_iterate [T]
libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6
__assert_fail@GLIBC_2.2.5 [T]
__ctype_tolower_loc@GLIBC_2.3 [T]
__cxa_finalize@GLIBC_2.2.5 [T]
...
strlen@GLIBC_2.2.5 [i]
strncasecmp@GLIBC_2.2.5 [i]
strstr@GLIBC_2.2.5 [i]
/usr/lib/x86_64-linux-gnu/libgmp.so.10.4.1
libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6
__ctype_b_loc@GLIBC_2.3 [T]
__cxa_finalize@GLIBC_2.2.5 [T]
__fprintf_chk@GLIBC_2.3.4 [T]
...
strtol@GLIBC_2.2.5 [W]
ungetc@GLIBC_2.2.5 [T]
vfprintf@GLIBC_2.2.5 [T]
/usr/lib/x86_64-linux-gnu/libc.so.6
ld-linux-x86-64.so.2 => /usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2
__libc_enable_secure@GLIBC_PRIVATE [D]
__libc_stack_end@GLIBC_2.2.5 [D]
__nptl_change_stack_perm@GLIBC_PRIVATE [T]
...
_dl_rtld_di_serinfo@GLIBC_PRIVATE [T]
_rtld_global@GLIBC_PRIVATE [D]
_rtld_global_ro@GLIBC_PRIVATE [D]
/usr/lib/x86_64-linux-gnu/libffi.so.8.1.0
libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6
__cxa_finalize@GLIBC_2.2.5 [T]
__errno_location@GLIBC_2.2.5 [T]
__getdelim@GLIBC_2.2.5 [T]
...
sysconf@GLIBC_2.2.5 [W]
unlink@GLIBC_2.2.5 [W]
write@GLIBC_2.2.5 [W]
Copyright (c) 2024 "dEajL3kA" <[email protected]>
This work has been released under the MIT license. See LICENSE.txt for details!