我试图检查是否有任何无线接口与bash脚本。我想我可以通过为每个接口检查/proc/net/wireless中的状态字段来做到这一点。然而,我试图寻找该领域中可能存在的价值及其含义的参考,但似乎什么也没有出现。有人知道吗?这是解决这个问题的理想方法吗?
发布于 2012-10-09 02:06:12
您需要检查每个接口的operstate,以判断它是向上、向下还是未知。这里有一种使用GNU awk的方法
awk '{ split(FILENAME, array, "/"); print array[5] ": " $1 }' $(find /sys/class/net/*/operstate ! -type d)在我的系统中,下面是一些结果:
eth0: up
lo: unknown
vboxnet0: down
wlan0: up要只检查无线接口,您需要检查每个接口下的一个名为“无线”的文件夹。这里有一种使用GNU awk的方法。
awk -F "/" 'FNR==NR { wire[$5]++; next } { split(FILENAME, state, "/"); if (state[5] in wire && $1 == "up") print state[5] }' <(find /sys/class/net/*/wireless -type d) $(find /sys/class/net/*/operstate ! -type d)结果:
wlan0伪码:
1. Get the directory names of the wireless devices as the 1st argument
2. Split these names on the "/" delimiter
3. Add the 5th column (the name of the wireless device) to an array called 'wire'
4. Now read in the operstates of all network interfaces as the 2nd argument
5. Split the interface filenames on the "/" delimiter to an array called 'state'
6. If the interface is a wireless interface (i.e. if it's in the array called
wire) and its operstate is "up", print it.https://stackoverflow.com/questions/12791608
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