#!/bin/bash
# Jack-Benny Persson
# LX13
# Exercise 7 lab 8 (Write a script to show logged in users in a HTML table
# Binaries
Awk="/usr/bin/awk"
Sed="/bin/sed"
Printf="/usr/bin/printf"
Who="/usr/bin/who"
# Variables
Outfile="/home/jake/loggedin.html"
# Sanity check
if [ ! -w `dirname $Outfile` ]; then
echo "Can't write to `dirname $Outfile`"
exit 1
fi
for Bin in $Awk $Sed $Printf $Who; do
if [ ! -x $Bin ]; then
echo "Can't execute $Bin"
exit 1
fi
done
### Main ###
exec 1> $Outfile
# Print the HTML header for us
$Printf "Logged in users\n"
$Printf "\n"
$Printf "
\n"
$Printf "
\n"
$Printf "
User
TTY
Date"
$Printf "
Time
\n"
$Printf "
\n"
# Print all the current logins for us in a nice table
$Who | \
awk 'BEGIN { OFS="