从嵌套的 for 循环中跳出

Question

我想知道有没有办法让循环层叠起来：

check_mac_address() {
    local mac=""
    for wunit in `get_wunit`; do
        for iuc in `get_iuc`; do            
            for assoc_mac in `get_iuc $wunit $iuc`;do
                if [ "$assoc_mac" = "$mac"]; then 
                    local int_type="WF" 
                    break #---> break from all loop  
                else
                    int_type="ETH"
                    break #---> break from all loop  
                fi 
            done
        done
    done
}

感谢任何帮助

Answer 1

break 接受一个参数，该参数指定要打破多少层周围循环；在你的情况下，我相信它会是 3:

http://www.gnu.org/software/bash/manual/bashref.html#Bourne-Shell-Builtins

Answer 2

来自http://tldp.org/LDP/abs/html/loopcontrol.html

A plain break terminates only the innermost loop in which it is embedded, but a break N breaks out of N levels of loop.

所以在你的情况下，你可以打破所有三个循环

break 3

从嵌套的 for 循环中跳出

Break from imbricated for loop

bash

shell

ash