How to read user keyboard input inside the case? Post: 302728477

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Homework and Emergencies Homework & Coursework Questions How to read user keyboard input inside the case? Post 302728477 by femchi on Thursday 8th of November 2012 02:13:36 AM

11-08-2012

Registered User

how should I apply this part to the script?

The “Delete files or directories” selection should prompt for a list of files or directories to be deleted. The script asks user for confirmation before deleting a file or a whole directory. The script must perform reasonable argument validation.

I tried to read the list of files and directories in a string but it is pretty hard to split the string based on space and put them in an array and then check them one by one and delete them. Also I was thinking to run a while loop to ask user to enter the name of file and then delete it and again repeat the job but it is not a nice way.
would you give me some clue?

Code:

#!/bin/sh
clear
	echo "\t `date "+%d/%m/%Y"`"
	echo "\t Hostname Machine: `hostname`"
	echo "\t user: `whoami` "
	echo "\t M A I N - M E N U"
	echo "\t 1.Copey Directory Tree"
	echo "\t 2.Delete Files or Directories"
	echo "\t 3.Output Information"
while true ; do
	echo -n "\t Please enter an option [ 1 - 4 ] : "
	read opt

	case "$opt" in
		1) echo "Enter the source of the files and destination for copying "
                   read src dest
                if [ -n "$src" -a -n "$dest" ]
		then
			if [ -d "$src" -o -f "$src" -a -d "$dest" ]
			then
			cp -r "$src" "$dest"
			else
			echo "Enter the valid file or directory addresses" 
			fi
		else
		echo "please enter valid address as a source and destination to copy the files "
			fi ;;
		2) echo "enter the name of files want to be deleted"
		read files
		for f in "$files"
		do
		echo "$f\n"
		done  
		 ;;

		3) echo "\t the number of possible users on the system: `cat /etc/passwd |wc -l`"
		   echo "\t the number of current user on the system : `who | wc -l`"
		   echo "\t the number of processes running: `ps -e | wc -l`"
			 ;;


		*) exit ;; 
	esac
done

---------- Post updated at 02:13 AM ---------- Previous update was at 12:50 AM ----------

Code:

2) echo "enter the name of files want to be deleted"
		read a
		
	for CHARACTER in $a ; do
	  if [ -f $CHARACTER -o -d $CHARACTER ] ; then
		rm -ir $CHARACTER
	else
	echo "$CHARACTER is not a valid file or directory"
	fi
	done
		 ;;

femchi

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LEARN ABOUT DEBIAN

runit

runit(8)						      System Manager's Manual							  runit(8)

NAME

       runit - a UNIX process no 1

SYNOPSIS

       runit

DESCRIPTION

       runit must be run as Unix process no 1.	It performs the system's booting, running, and shutdown in three stages:

STAGE 1
       runit  runs  /etc/runit/1  and  waits  for  it  to terminate.  The system's one time tasks are done here.  /etc/runit/1 has full control of
       /dev/console to be able to start an emergency shell if the one time initialization tasks fail. If /etc/runit/1 crashes, or exits 100, runit
       will skip stage 2 and enter stage 3.

STAGE 2
       runit  runs  /etc/runit/2,  which  should  not  return  until system shutdown; if it crashes, or exits 111, it will be restarted.  Normally
       /etc/runit/2 starts runsvdir(8).  runit is able to handle the ctrl-alt-del keyboard request in stage 2, see below.

STAGE 3
       If runit is told to shutdown the system, or stage 2 returns, it terminates stage 2 if it is running, and runs  /etc/runit/3.   The  systems
       tasks  to  shutdown  and  possibly halt or reboot the system are done here.  If stage 3 returns, runit checks if the file /etc/runit/reboot
       exists and has the execute by owner permission set.  If so, the system is rebooted, it's halted otherwise.

CTRL-ALT-DEL
       If runit receives the ctrl-alt-del keyboard request and the file /etc/runit/ctrlaltdel exists and has the execute by owner permission  set,
       runit runs /etc/runit/ctrlaltdel, waits for it to terminate, and then sends itself a CONT signal.

SIGNALS

       runit only accepts signals in stage 2.

       If  runit  receives a CONT signal and the file /etc/runit/stopit exists and has the execute by owner permission set, runit is told to shut-
       down the system.

       if runit receives an INT signal, a ctrl-alt-del keyboard request is triggered.

SEE ALSO

       runit-init(8), runsvdir(8), runsvchdir(8), sv(8), runsv(8), chpst(8), utmpset(8), svlogd(8)

       http://smarden.org/runit/

AUTHOR

       Gerrit Pape <pape@smarden.org>

																	  runit(8)

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