Shell 函数

系统函数

basename 获取文件名，返回绝对路径最后/的部分

basename [pathname] [suffix]

basename [string] [suffix]

basename /root/shell/myShell.sh
myShell.sh
basename /root/shell/myShell.sh .sh #去掉.sh后缀
myShell

basename /root/shell
shell

dirname 获取路径，返回去除绝对路径最后部分的目录，与basename相反

dirname /root/shell/myShell.sh
/root/shell

dirname /root/shell
/root

自定义函数

[ function ] funname[()]
{
        content;
        [return int;]
}

#!/bin/bash
function getSum()
{
      SUM=$[$1+$2]
      ECHO "SUM=$SUM"
}
read -p "NUM1=" NUM1
read -p "NUM2=" NUM2
getSUM $NUM1 $NUM2