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 OPENSOLARIS

echo

echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME

       echo - echo arguments to standard output

SYNOPSIS

       /usr/ucb/echo [-n] [argument]

DESCRIPTION

       echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output.

       echo  is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi-
       ronment variables.

       For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows:

	   o	  echo your current-working-directory's full pathname

	   o	  pipe the output through tr to translate the path's embedded slash-characters into space-characters

	   o	  pipe that output through wc -w for a count of the names in your path.

		    example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w"

       See tr(1) and wc(1) for their functionality.

       The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be  invoked	if
       the  user  calls  echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape
       characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the  black-slashed  escape  characters,	and  ksh's
       echo() also understands a as the audible bell character; however, these commands do not have an -n option.

OPTIONS

       -n    Do not add the NEWLINE to the output.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5)

NOTES

       The -n option is a transition aid for BSD applications, and may not be supported in future  releases.

SunOS 5.11							    3 Aug 1994								  echo(1B)

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