shell中 shift的使用

[[email protected] shell]# cat shift.sh

#!/bin/bash

until [ $# -eq 0 ];do

echo "the first is:$1  total is $#"

shift

done

[[email protected] shell]# ./shift.sh  1 2 3 4 5 6

the first is:1  total is 6

the first is:2  total is 5

the first is:3  total is 4

the first is:4  total is 3

the first is:5  total is 2

the first is:6  total is 1

[[email protected] shell]# cat shiftest.sh

#!/bin/bash

until [ -z "$1" ]

do

echo "[email protected] "

shift

done

[[email protected] shell]# ./shiftest.sh 1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9

2 3 4 5 6 7 8 9

3 4 5 6 7 8 9

4 5 6 7 8 9

5 6 7 8 9

6 7 8 9

7 8 9

8 9

9