在Linux上:如何以编程方式确定是否启用并插入了NIC接口? [英] On Linux: how can I programmatically determine if a NIC interface is enabled and plugged in?

问题描述

我想确定网卡是否已启用，启动和插入.基本上，我想知道网卡是否可以工作.我需要使用C ++程序获取此信息，并且想在网络无法正常工作时显示错误消息.如果可能的话，我想避免使用shell命令来确定此信息.

I want to determine if a network card is enabled, up, and plugged in. Basically, I want to know if the network card will work. I need this information from with a C++ program, and would like to display an error message when the network isn't working properly. If possible I would like to avoid using shell commands to determine this information.

推荐答案

您可以查看/sys/class/net/eth0/operstate，其中eth0是您的界面，以查看其是否可用.

You can look at /sys/class/net/eth0/operstate where eth0 is your interface to see if it's up.

查看/sys/class/net/eth0/carrier看看是否有承运人.

Look at /sys/class/net/eth0/carrier to see if there is a carrier.

尽管我想执行ifconfig，并且朋友会给您* BSD的更多兼容性.

Though I guess executing ifconfig and friends will give you more compatibility to *BSDs.

这篇关于在Linux上:如何以编程方式确定是否启用并插入了NIC接口?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！