library陷阱

fog posted @ 2008年8月29日 20:12 in 技术相关 with tags linux , 2551 阅读

今天在做一个embedded system的测试的时候发现一个奇怪的问题。新做的fs, 启动后一切正常。ping外部ip也可以正常工作,但是添加/etc/resolv.conf后,始终无法解析dns。

/ # ping www.sina.com.cn
ping: www.sina.com.cn: Unknown server error
 

于是porting了一个strace,跟踪了一下,发现原来是少了动态链接库libresolv*和libnss_dns*(这是glibc里面的, uclibc库名不一样)。

拷过来,问题解决。

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