#b.sh 首頁（登入介面）：

echo "------->haha<-------";
echo "  1、登入";
echo "  2、註冊";
echo "  3、退出";
echo
read -p "" a;
case "$a" in
1)
    clear ; #清屏！
A () {
   echo "++++++登入介面++++++"
   read -p "使用者名稱：" n;
   read -s -p "密碼：" pw;
    echo;
   while [ -z $n ] & [ -z $pw ] ;do
            echo "使用者名稱或密碼為空！請重新輸入！";
            A;
   done
 }
    A;
   name=`cat /root/shell/ming/1.txt | grep -w $n | cut -d " " -f 1`;
    if [ -z $name ] ;then
            echo "使用者不存在";
            read -p "是否註冊(y/n)" a1;
                    if [ $a1 == y ] ;then
                            /root/shell/ming/a.sh ;
                    else
                            A;
                    fi
    fi
   passwd=`cat /root/shell/ming/1.txt | grep -w $n | cut -d " " -f 4`;
    if [ -z $pw ] ;then
            echo "密碼不能為空！";
            A;
    fi
    if [ $name = $n ] && [ $passwd = $pw ] ;then
            echo "登陸成功！";
            /root/shell/ming/c.sh ;
   else
            echo "使用者名稱或密碼錯誤！";
            /root/shell/ming/b.sh ;
   fi
;;
2)
    clear ;
  /root/shell/ming/a.sh
  echo "使用者建立成功！";
;;
3)
    clear ;
  echo "已退出！";
;;
*)
  /root/shell/ming/b.sh
;;
esac
 

#a.sh 用於註冊，資訊存放在1.txt中：

name () {
    read -p "使用者名稱：" n;
    while [ -z $n ] ;do
            name;
    done
}
sex () {
    read -p "性別：" s;
    if [ $s = "男" -o $s = "女" ] ;then
            age;
    else
            echo "請選擇有效性別，謝謝！";
            sex;
    fi
}
age () {
    read -p "年齡：" a;
    while [ -z $a ] ;do
            age;
    done
}
passwd () {
    read -s -p "密碼：" pw;
    while [ -z $pw ] ;do
            echo "密碼不能為空！";
            passwd;
    done
}
name;
sex;
passwd;
echo "使用者資訊：$n ,$s ,$a";
echo "$n $s $a $pw" >> 1.txt
echo "使用者建立成功！";
/root/shell/ming/b.sh ;
 

#c.sh 主頁面（寫日記，檢視，刪除）

read -p "
+++++++Welcome+++++++
 ------To------
1、寫日記;
2、檢視日記;
3、刪除日記;
4、退出登入;
" a;
i=`ls /root/shell/ming/a | wc -l`;
case "$a" in
1)
    clear ;
#寫日記到使用者目錄；
    echo "y:儲存！";
    echo "n:退出！";
    read -p "
-------草稿---------
" a;
    read -p "是否儲存(y/n)" b;
    if [ $b == y ] ;then
            j=`expr $i + 1` ;
            echo $a >> a/$j;
            /root/shell/ming/c.sh ;
    else
            echo "已退出！";
            /root/shell/ming/c.sh ;
    fi
;;
2)
    clear ;
#檢視日記；
    echo `ls /root/shell/ming/a` ;
    read -p "選擇您要檢視的日記：" b;
    b1=`ls /root/shell/ming/a | grep $b`
    if [ -n $b1 ] ;then
            cat /root/shell/ming/a/$b1 ;
            /root/shell/ming/c.sh ;
    else
            echo "檔案不存在！";
            /root/shell/ming/c.sh ; #迴圈到開始介面；
    fi
;;
3)
    clear ;
#刪除日記；
    echo "`ls /root/shell/ming/a`";
    read -p "選擇要刪除的日記：" a;
    b=`ls /root/shell/ming/a | grep -w $a` ;
    if [ -z $b ] ;then
            echo "檔案不存在！";
            /root/shell/ming/c.sh ;
    else
            rm -rf /root/shell/ming/a/$b ;
            /root/shell/ming/c.sh ;
    fi
;;
4)
    clear ;
#退出登入
    /root/shell/ming/b.sh ;
;;
*)
    echo "操作不當！";
    /root/shell/ming/c.sh ;
;;
esac