我的環境是ubuntu16.04
glibc官網：http://www.gnu.org/software/libc/libc.html
方法一、一般來說，涉及到庫調用的程序，在鏈接時候都會鏈接到glibc，所以，可以用ldd命令來查看
ghostwu@ubuntu:~/c_program/linux_unix/chapter4$ ldd ./pwd | grep libc libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f7c45491000) ghostwu@ubuntu:~/c_program/linux_unix/chapter4$ /lib/x86_64-linux-gnu/libc.so.6 GNU C Library (Ubuntu GLIBC 2.23-0ubuntu9) stable release version 2.23, by Roland McGrath et al. Copyright (C) 2016 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Compiled by GNU CC version 5.4.0 20160609. Available extensions: crypt add-on version 2.1 by Michael Glad and others GNU Libidn by Simon Josefsson Native POSIX Threads Library by Ulrich Drepper et al BIND-8.2.3-T5B libc ABIs: UNIQUE IFUNC For bug reporting instructions, please see: <https://bugs.launchpad.net/ubuntu/+source/glibc/+bugs>.
這個就是我的電腦上glibc的路徑：/lib/x86_64-linux-gnu/libc.so.6
方法二：man -k glibc，可以找到一個系統函數gnu_get_libc_version，他可以用來獲取版本
ghostwu@ubuntu:~$ man -k libc cracklib-check (8) - Check passwords using libcrack2 create-cracklib-dict (8) - Check passwords using libcrack2 curl-config (1) - Get information about a libcurl installation error (3) - glibc error reporting functions error_at_line (3) - glibc error reporting functions error_message_count (3) - glibc error reporting functions error_one_per_line (3) - glibc error reporting functions error_print_progname (3) - glibc error reporting functions glibc (7) - overview of standard C libraries on Linux gnu_get_libc_release (3) - get glibc version and release gnu_get_libc_version (3) - get glibc version and release libc (7) - overview of standard C libraries on Linux ghostwu@ubuntu:~$ man 3 gnu_get_libc_version
/*================================================================ * Copyright (C) 2018 . All rights reserved. * * 文件名稱：check_glibc_version.c * 創 建 者：ghostwu(吳華) * 創建日期：2018年01月10日 * 描 述：獲取GNU C庫(glibc)的版本號 * ================================================================*/ #include <stdio.h> #include <gnu/libc-version.h> int main(int argc, char *argv[]) { printf( "glibc's version: %s\n", gnu_get_libc_version() ); return 0; }
方法三、getconf GNU_LIBC_VERSION