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Full Discussion: Execute function as soon as input is provided in menu drive shell script
Top Forums Shell Programming and Scripting Execute function as soon as input is provided in menu drive shell script Post 302975840 by kiran_j on Monday 20th of June 2016 02:31:39 AM
Old 06-20-2016
Execute function as soon as input is provided in menu drive shell script
Hi All,

I have a menu driven scripts. As you know while running the script we have to input the option such as 1,2, and 3 to execute function accordingly. but after selecting the input we have to press Enter.

My requirement is to execute function as soon as we press the option.

Is there any way to do this? Please suggest.

Display Menu:

Code:
Code:
-------------------------------------
            Main Menu
-------------------------------------
[1] Option 1
[2] Option 2
[3] Option 3
[4] Option 4
[5] Exit
=====================================
Enter your menu choice [1-5] [Default :1]:


Current Shell Script Code:


Code:


Code:
#!/usr/bin/bash

# Menu Item

main_menu()
{

while :
do
	clear
	echo " "
	echo "-------------------------------------"
	echo "            Main Menu "
	echo "-------------------------------------"
	echo "[1] Option 1"
	echo "[2] Option 2"
	echo "[3] Option 3"
	echo "[4] Option 4"
	echo "[5] Exit"
	echo "====================================="
	echo "Enter your menu choice [1-5] [Default : 1]: \c "
	read m_menu
	
	case "$m_menu" in

		1) option_1;;
		2) option_2;;
		3) option_3;;
		4) option_4;;
		5) exit 0;;
                "") option_1;;
		*) echo "\nOpps!!! Please Select Correct Choice";
		   echo "Press ENTER To Continue..." ; read ;;
	esac
done
}

option_1()
{
  echo "option 1"
  echo "\nPress ENTER To Continue..."
    read
	return
}

option_2()
{
	echo "option 2"
	echo "\nPress ENTER To Continue..."
    read
	return
}

option_3()
{
	echo "option 3"
	echo "\nPress ENTER To Continue..."
    read
	return
}

option_4()
{
	echo "option 4"
	echo "\nPress ENTER To Continue..."
    read
	return
}

main_menu


Regards,
Kiran
Last edited by kiran_j; 06-20-2016 at 03:37 AM..
 

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LEARN ABOUT OPENSOLARIS

echo

echo(3XCURSES)						  X/Open Curses Library Functions					    echo(3XCURSES)

NAME

       echo, noecho - enable/disable terminal echo

SYNOPSIS

       cc [ flag... ] file... -I /usr/xpg4/include  -L	/usr/xpg4/lib 
	-R  /usr/xpg4/lib  -lcurses  [ library... ]

       c89 [ flag... ] file... -lcurses [ library... ]

       #include <curses.h>

       int echo(void);

       int noecho(void);

DESCRIPTION

       The  echo()  function enables Echo mode for the current screen. The noecho() function disables Echo mode for the current screen. Initially,
       curses software echo mode is enabled and hardware echo mode of the tty driver is disabled. The echo() and noecho() functions control  soft-
       ware echo only. Hardware echo must remain disabled for the duration of the application, else the behavior is undefined.

RETURN VALUES

       Upon successful completion, these functions return OK. Otherwise, they return ERR.

ERRORS

       No errors are defined.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       getch(3XCURSES), getstr(3XCURSES), initscr(3XCURSES), libcurses(3XCURSES), scanw(3XCURSES), attributes(5), standards(5)

SunOS 5.11							    5 Jun 2002							    echo(3XCURSES)
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