[shell] 一次性赋值多个变量

管道符是fork子进程，子进程的变量无法传回父进程

[root@XM-v106 ~]# echo "1 2 3" | read a b c;echo $a

[root@XM-v106 ~]# echo "1 2 3" | { read a b c;echo $a; }
1
[root@XM-v106 ~]# echo $a;echo end

end

 

read放到前面来

[root@XM-v106 ~]# read a b c <<< "4 5 6"
[root@XM-v106 ~]# echo $a
4
[root@localhost ~]# read x y z < <(echo 4 5 6)
[root@localhost ~]# echo $y
5