Command Line to see the contents Shared Object Module(lib*.so)

Question

What is the command line to see the contents of a Shared Object module (lib*.so)?

Like how we use:

ar -t lib*.a

for archives(lib*.a) an

Answer 1

use nm -D --defined-only libname.so to get the symbol names from your dynamic library.
The --defined-only switch shows you only the symbol that are defined in these files, and not references to external functions.

An alternative is to use objdump, and catch only the symbols in the text section :

objdump -T /usr/lib/libjpeg.so | grep text
...
0001b5c0 g    DF .text  00000016  Base        jdiv_round_up
00003730 g    DF .text  00000417  Base        jpeg_set_colorspace
0000cda0 g    DF .text  000002de  Base        jpeg_consume_input
00002b30 g    DF .text  00000023  Base        jpeg_abort_compress
00003b50 g    DF .text  000000b6  Base        jpeg_default_colorspace
00002810 g    DF .text  00000067  Base        jpeg_suppress_tables
00004110 g    DF .text  00000130  Base        jpeg_add_quant_table
000100c0 g    DF .text  0000011f  Base        jpeg_save_markers
...