Solved

shell program

Posted on 2000-04-23
4
324 Views
Last Modified: 2010-04-21
write a shell program(boune shell) on the following topic.

watching all people logging in and out and report as people come and go- a sort of incremental who. also display statistics of people logged in and logged out every 2 minutes.
0
Comment
Question by:sriram_bandi
  • 3
4 Comments
 
LVL 2

Expert Comment

by:jonke
ID: 2744204
Is this the sort of thing you are after?

#!/bin/ksh
#
#Lets see who is on the system at the moment
#
clear
echo "USERS WHO ARE CURRENTLY ON THE SYSTEM"
echo ""
who
who > /tmp/who1
#
#Create an eternal loop
#
LOOP=1
while (( $LOOP == 1 ))
        do
        sleep 20
#
#Make it all nice and neat
#
        clear
        echo "USERS WHO ARE CURRENTLY ON THE SYSTEM"
        echo ""
        who
        who > /tmp/who2
#
#Compare who output, with the one from 2 mins ago
#
        diff /tmp/who1 /tmp/who2 > /tmp/who_diff
        grep ">" /tmp/who_diff > /tmp/who_joined
        grep "<" /tmp/who_diff > /tmp/who_left
#
#Then output who is currently on the system, who has left and who has joined
#in a presentable format
#
        echo ""
        echo "USERS THAT HAVE LOGGED ONTO THE SYSTEM"
        echo ""
                if [[ -s /tmp/who_joined ]]
                then
                cat /tmp/who_joined
                else
                echo "No users have logged onto the system in the last 2 mins"
                fi
0
 
LVL 2

Expert Comment

by:jonke
ID: 2744243
Sorry- you wanted bourne shell didn't you?

Here is the revised version:

#!/bin/sh
#
#Lets see who is on the system st the moment
#
clear
echo "USERS WHO ARE CURRENTLY ON THE SYSTEM"
echo ""
who
who > /tmp/who1
#
#Create an eternal loop
#
while [ 1 ]
        do
        sleep 120
#
#Make it all nice and neat
#
        clear
        echo "USERS WHO ARE CURRENTLY ON THE SYSTEM"
        echo ""
        who
        who > /tmp/who2
#
#Compare who output, with the one from 2 mins ago
#
        diff /tmp/who1 /tmp/who2 > /tmp/who_diff
        grep ">" /tmp/who_diff > /tmp/who_joined
        grep "<" /tmp/who_diff > /tmp/who_left
#
#Then output who is currently on the system, who has left and who has joined
#in a presentable format
#
        echo ""
        echo "USERS THAT HAVE LOGGED ONTO THE SYSTEM"
        echo ""
                if [ -s /tmp/who_joined ]
                then
                cat /tmp/who_joined
                else
                echo "No users have logged onto the system in the last 2 mins"
                fi
        echo ""
        echo "USERS THAT HAVE LEFT THE SYSTEM"
        echo ""
                if [ -s /tmp/who_left ]

then
                cat /tmp/who_left
                else
                echo "No users have logged off the system in the last 2 mins"
                fi
        echo ""
        cp /tmp/who2 /tmp/who1
        rm /tmp/who_joined /tmp/who_left
done
0
 
LVL 2

Accepted Solution

by:
jonke earned 50 total points
ID: 2746515
Is the above ok?
0
 

Author Comment

by:sriram_bandi
ID: 2750742
Thanks a lot jonke... I executed the program it is working good.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
how to check for shares on aix 1 66
Where to get php 5.6 for AIX 7.1? 5 80
Linux: disable vim auto-comment 7 95
How to calculate the current use of PVU on my TSM server. 4 59
My previous tech tip, Installing the Solaris OS From the Flash Archive On a Tape (http://www.experts-exchange.com/articles/OS/Unix/Solaris/Installing-the-Solaris-OS-From-the-Flash-Archive-on-a-Tape.html), discussed installing the Solaris Operating S…
FreeBSD on EC2 FreeBSD (https://www.freebsd.org) is a robust Unix-like operating system that has been around for many years. FreeBSD is available on Amazon EC2 through Amazon Machine Images (AMIs) provided by FreeBSD developer and security office…
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
In a previous video, we went over how to export a DynamoDB table into Amazon S3.  In this video, we show how to load the export from S3 into a DynamoDB table.

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

26 Experts available now in Live!

Get 1:1 Help Now