Fetch all the configured libc versions and extract the symbol offset
$ ./get
Find all the libc's in the database that have a given name at the given address (only the last 12 bits are checked, because randomization usually works on page size level)
$ ./find printf 260
archive-eglibc (id 2.15-0ubuntu10_amd64)
archive-glibc (id 2.19-10ubuntu2_i386)
archive-glibc (id 2.19-10ubuntu2_i386)
Find a libc from the leaked return address into __libc_start_main.
$ ./find __libc_start_main_ret a83
ubuntu-trusty-i386 (id 2.19-0ubuntu6.6_i386)
archive-eglibc (id 2.19-0ubuntu6_i386)
ubuntu-utopic-i386 (id 2.19-10ubuntu2.3_i386)
archive-glibc (id 2.19-10ubuntu2_i386)
archive-glibc (id 2.19-15ubuntu2_i386)
Dump some useful offsets, given a libc ID:
$ ./dump 2.19-0ubuntu6.6_i386
offset___libc_start_main_ret = 0x19a83
offset_system = 0x00040190
offset_dup2 = 0x000db590
offset_recv = 0x000ed2d0
offset_str_bin_sh = 0x160a24