暂停执行并等待用户输入

Question

我有一个正在制作的脚本，但我遇到了一个问题：我想暂停执行并等待用户输入。我以为我有这个read -p -n 1 $foo命令，但系统有这个命令的问题。这是我当前的脚本：

#!/bin/sh

# Ititialization

mainmenu () {
  echo "Press 1 to update your system"
  echo "Press 2 to install samba"
  echo "Press 3 to install vsFTPd"
  echo "Press 4 to install the current version of Webmin"
  echo "Press 5 to configure samba for Active Directory"
  echo "Press x to exit the script"
  read -n 1 -p "Input Selection:" mainmenuinput
  if [ "$mainmenuinput" = "1" ]; then
            updatesystem
        elif [ "$mainmenuinput" = "2" ]; then
            installsamba
        elif [ "$mainmenuinput" = "3" ]; then
            installvsftpd
        elif [ "$mainmenuinput" = "4" ]; then
            installwebmin
        elif [ "$mainmenuinput" = "5" ]; then
            configuresambaforactivedirectory
        elif [ "$mainmenuinput" = "x" ];then
            quitprogram
        elif [ "$mainmenuinput" = "X" ];then
            quitprogram
        else
            echo "You have entered an invallid selection!"
            echo "Please try again!"
            echo ""
            echo "Press any key to continue..."
            read -n 1
            clear
            mainmenu
        fi
}

# This builds the main menu and routs the user to the function selected.

mainmenu

# This executes the main menu function.
# Let the fun begin!!!! WOOT WOOT!!!!

您可能会在主菜单功能中注意到 read -n 1 -p "text go here" 条目。根据ubuntu，这就是我遇到问题的地方。有人能告诉我出了什么问题吗？谢谢！

Answer 1

应该：

read  -n 1 -p "Input Selection:" mainmenuinput

需要将n标志放在后面，因为这是告诉 read 在输入N 个字符后执行，不要等待整行。检查help read和这个细节。