在Unix Shell脚本中分配chmod权限并排除文件

我正在尝试编写一个shell脚本，允许用户使用chmod命令输入权限、目录名和要排除的文件。我似乎无法使它正常工作。我对shell脚本非常陌生，所以这可能是一个简单的语法错误。我的代码如下所示：

    #!/bin/bash

clear
echo "   ====================================
    We need our rights!
    Set file permissions!
    Only use numerical representation
    of permissions listed below!
   ====================================

        1) r. read access to a file
        2) w. write access to a file
        3) x. Execute access to a file "

echo "Please enter a permission:"
read permish
echo
echo "Please enter your directory name:"
read directory
echo
echo "Please enter a file to exclude:"
read exclFile

perm=""

if [ "$permish" -eq 1 ]; then
   "$perm" = "u+r"
elif [ "$permish" -eq 2 ]; then
   "$perm" = "u+w"
elif [ "$permish" -eq 3 ]; then
   "$perm" = "u+x"
else
    echo "invalid input"
fi

<chmod perm= "$perm" >
  <fileset dir= "$directory" >
    <exclude name= "**/$exclFile" />
  </fileset>
</chmod>

echo "Done!"

---

您的脚本不是符合bash的文件：

---

像这样的XML标记在此脚本中没有任何作用。要排除文件，必须首先通过排除此列表中的文件来创建目录的文件列表，然后对未排除的文件应用chmod。对此有用的命令有ls/find、grep-v、xargs-n1。有关详细信息，请查看手册页。

您的解决方案不完整：排除意味着对$xcldfile中的文件根本不执行“chmod”。

#!/bin/bash
clear
echo "   ====================================
    We need our rights!
    Set file permissions!
    Only use numerical representation
    of permissions listed below!
   ====================================

        1) r. read access to a file
        2) w. write access to a file
        3) x. Execute access to a file "

echo "Please enter a permission number
 Exit with [x]:"
   read permish
 echo "Please enter a directory name:"
read dir
 echo "Please enter a file to exclude:"
read xcldfile
   case "$permish" in
1)
 chmod -R u+r $dir
 chmod u-r */$xcldfile
;;
2)
 chmod -R u+w $dir
 chmod u-w */$xcldfile
;;
3)
 chmod -R u+x $dir
 chmod u-x */$xcldfile
;;
x)
 exit;;
*)
 echo "invalid input. Try again"
 sleep 2
bash HW2P1.sh
;;
esac
 echo "Done!"