linux shell 编写菜单脚本事例

menu2文件代码：

---

#!/bin/sh
#menu2
#Main menu script
#ignore ctrl-c and QUIT interrupts
trap "" 2 3 15
MYDATE=`date +%d/%m/%Y`
THIS_HOST=`hostname -s`

USER=`whoami`

#user level file
USER_LEVELS=priv.user

#hold file
HOLD1=hold1.$$

#colour function

function colour ()
{
  case $1 in
    black_green)
       echo ''
       ;;
    black_yellow)
       echo ''
       ;;
    black_white)
       echo '[40;37'
       ;;
    black_cyan)
       echo ''
       ;;
    red_yellow)
       echo ''
       ;;
   esac
}

#just read a single key please
function get_char()
{
  #get_char
  #save current stty setting
  SAVEDSTTY=`stty -g`
  stty cbreak
  dd if=/dev/tty bs=1 count=1 2>/dev/null
  stty -cbreak
  #restore stty
  stty $SAVEDSTTY
}
#turn the cursor on or off
function cursor ()
{
  #turn cursor on/off
  _OPT=$1
  case $_OPT in
   on ) echo '[?25h'
        ;;
   off) echo '[?25l'
        ;;
   *) return 1
        ;;
   esac
}

#check what privilege level the user has
function restrict ()
{
   colour red_yellow
   echo -e -n "\n\n\007 Sorry your are not authorised to use this function"
   colour black_green

}

function user_level ()
{
  #read in the priv.user file
  while read LINE
  do
    case $LINE in
      #ignore comments
    \#*) ;;
      *) echo $LINE>>$HOLD1
         ;;
     esac
  done < $USER_LEVELS
  FOUND=false
  while read MENU_USER PRIV
  do
    if [ "$MENU_USER" = "$USER"  ] ; then
      FOUND=true
      case $PRIV in
        yes|YES)
           return 0
           ;;
        no|NO)
           return 1
           ;;
      esac
    else
    #no match found read next record
     continue
     fi
   done <$HOLD1
   if [ "$FOUND" = "false" ] ; then
      echo "Sorry $USER  you have not been authorsied to use this menu"
      exit 1
    fi   
}

#called when user selects quit
function my_exit ()
{
  colour black_white
  cursor on
  rm *.$$
  exit 0
}

tput init
#display their user levels on the screen
if user_level ; then
ACCESS="Access Mode is High"
else
ACCESS="Access Mode is Normal"
fi

tput init
while :
do
tput clear
colour black_green
cat <<MAYDAY
$ACCESS
---------------------------------------------------------------------
User:$USER                 Host:$THIS_HOST            Date:$MYDATE
---------------------------------------------------------------------
                   1:ADD A RECORD
                   2:VIEW A RECORD
                   3:PAGE ALL RECORD
                   4:CHANGE A RECORD
                   5:DELETE A RECORD
                   P:PRINT ALL RECORDS
                   H:Help screen
                   Q:Exit Menu
---------------------------------------------------------------------
MAYDAY
colour black_cyan
echo -e -n "\tYour Choice [1,2,3,4,5,P,H,Q] >"
CHOICE=`get_char`
 case $CHOICE in
  1) ls
     ;;
  2) vi
     ;;
  3) who
     ;;
  4) if user_level; then
       ls -l | wc
     else
       restrict
      fi
      ;;
  5) if user_level;then
       sort  /etc/passwd
     else
       restrict
     fi
       ;;
   P|p) echo -e "\n\nPrinting recirds ......"
       ;;
   H|h)
   tput clear
   cat <<MAYDAY
This is the help screen ,nothing here yet to help you!
MAYDAY
;;
    Q|q) my_exit
       ;;
    *) echo -e "\t\007unknown user respense"
       ;;
     esac
echo -e -n "\tHit the return key to continue"
read DUMMY
done

 

---

priv.user 文件代码：

#root quanxian wei  YES, daia quanxianwei no

root   yes

daia   no

 

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脚本执行后界面如下图：