#!/bin/bash
# SCRIPT : menu_dialog.sh
# PURPOSE : A menu driven Shell script using dialog utility
# which has following options:
# Display Today's Date and Time.
# Display calendar.
# Delete selected file from supplied directory.
# List of users currently logged in
# Disk Statistics
# Exit
#
##############################################################################
# Checking availability of dialog utility #
##############################################################################
# dialog is a utility installed by default on all major Linux distributions.
# But it is good to check availability of dialog utility on your Linux box.
which dialog &> /dev/null
[ $? -ne 0 ] && echo "Dialog utility is not available, Install it" && exit 1
##############################################################################
# Define Functions Here #
##############################################################################
###################### deletetempfiles function ##############################
# This function is called by trap command
# For conformation of deletion use rm -fi *.$$
deletetempfiles()
{
rm -f *.$$
}
######################## Show_time function #################################
# Shows today's date and time
show_time()
{
dialog --backtitle "MENU DRIVEN PROGRAM" --title "DATE & TIME" \
--msgbox "\n Today's Date: `date +"%d-%m-%Y"` \n\n \
Today's Time: `date +"%r %Z"`" 10 60
}
###################### user_add fuction #####################################
user_add()
{
if [ $(id -u) -eq 0 ]; then
# read -p "Enter username : " username
# read -s -p "Enter password : " password
dialog --backtitle "MENU DRIVEN PROGRAM" --title "User Add" \
--inputbox "\nEnter User name you want to add " 12 60 2> temp5.$$
username=`cat temp5.$$`
dialog --backtitle "MENU DRIVEN PROGRAM" --title "User Add" \
--inputbox "\nEnter User Password for user $useradd " 12 60 2> temp6.$$
password=`cat temp6.$$`
egrep "^$username" /etc/passwd >/dev/null
if [ $? -eq 0 ]; then
dialog --backtitle "MENU DRIVEN PROGRAM" --title "useradd" \
--msgbox "User $username already exists." 12 25
else
pass=$(perl -e 'print crypt($ARGV[0], "password")' $password)
useradd -m -p $pass $username
[ $? -eq 0 ] && dialog --backtitle "MENU DRIVEN PROGRAM" --title "useradd" \
--msgbox "User $username has been added to system." 12 25 || dialog --backtitle "MENU DRIVEN PROGRAM" --title "useradd" --msgbox "User $username failed to add." 12 25
fi
else
echo "Only root may add a user to the system"
fi
#dialog --backtitle "MENU DRIVEN PROGRAM" --title "User Add" \
#--inputbox "\nEnter User name you want to add " 12 60 2> temp5.$$
#useradd=`cat temp5.$$`
#dialog --backtitle "MENU DRIVEN PROGRAM" --title "User Add" \
#--inputbox "\nEnter User Password for user $useradd " 12 60 2> temp6.$$
#passwd=`cat temp6.$$`
#egrep "^$useradd" /etc/passwd >/dev/null
# if [ $? -eq 0 ]; then
# echo "$username exists!"
# exit
# else
# echo ${passwd} | ${PW} add user ${useradd} -h 0 >/dev/null 2>&1
#if [ $? -eq 0 ]
#then
#dialog --backtitle "MENU DRIVEN PROGRAM" --title "useradd" \
#--msgbox "User $useradd is successfully added" 12 25
#else
#dialog --backtitle "MENU DRIVEN PROGRAM" --title "useradd" \
#--msgbox "Failed to add user to the system." 12 25
#fi
#fi
}
###################### user_del fuction #####################################
user_del()
{
if [ $(id -u) -eq 0 ]; then
# read -p "Enter username : " username
# read -s -p "Enter password : " password
dialog --backtitle "MENU DRIVEN PROGRAM" --title "User del" \
--inputbox "\nEnter User name you want to delete " 12 60 2> temp55.$$
username=`cat temp55.$$`
egrep "^$username" /etc/passwd >/dev/null
if [ $? -eq 0 ]; then
userdel $username
dialog --backtitle "MENU DRIVEN PROGRAM" --title "userdel" \
--msgbox "User $username succsessfully deleted." 12 25
else
dialog --backtitle "MENU DRIVEN PROGRAM" --title "userdel" \
--msgbox "User $username has been not found in system." 12 25
fi
else
echo "Only root may add a user to the system"
fi
}
###################### log_clear fuction #####################################
####################### show_cal function ###################################
# Shows current month calendar
show_cal()
{
dialog --backtitle "MENU DRIVEN PROGRAM" --title "CALENDAR" \
--msgbox "`cal`" 12 25
}
####################### deletefile function #################################
# Used to delete file under supplied directory, not including sub dirs.
deletefile()
{
dialog --backtitle "MENU DRIVEN PROGRAM" --title "Directory Path" \
--inputbox "\nEnter directory path (Absolute or Relative) \
\nPress just Enter for current directory" 12 60 2> temp1.$$
if [ $? -ne 0 ]
then
rm -f temp1.$$
return
fi
rmdir=`cat temp1.$$`
if [ -z "$rmdir" ]
then
dirname=$(pwd) # You can also use `pwd`
rmdir=$dirname/*
else
# remove trailing * and / from directory path
echo "$rmdir" | grep "\*$" &> /dev/null && rmdir=${rmdir%\*}
echo "$rmdir" | grep "/$" &> /dev/null && rmdir=${rmdir%/}
# Check supplied directory exist or not
( cd $rmdir 2>&1 | grep "No such file or directory" &> /dev/null )
# Above codeblock run in sub shell, so your current directory persists.
if [ $? -eq 0 ]
then
dialog --backtitle "MENU DRIVEN PROGRAM" \
--title "Validating Directory" \
--msgbox "\n $rmdir: No such file or directory \
\n\n Press ENTER to return to the Main Menu" 10 60
return
fi
# Do you have proper permissions ?
( cd $rmdir 2> /dev/null )
if [ $? -ne 0 ]
then
dialog --backtitle "MENU DRIVEN PROGRAM" \
--title "Checking Permissions" \
--msgbox "\n $rmdir: Permission denied to access this directory \
\n\n Press ENTER to return to the Main Menu" 10 60
return
fi
if [ ! -r $rmdir ]
then
dialog --backtitle "MENU DRIVEN PROGRAM" \
--title "Checking Permissions" \
--msgbox "\n $rmdir: No read permission \
\n\n Press ENTER to return to the Main Menu" 10 60
return
fi
dirname=$rmdir
rmdir=$rmdir/* # get all the files under given directory
fi
for i in $rmdir # process each file
do
# Store all regular file names in temp2.$$
if [ -f $i ]
then
echo " $i delete? " >> temp2.$$
fi
done
if [ -f temp2.$$ ]
then
dialog --backtitle "MENU DRIVEN PROGRAM" \
--title "Select File to Delete" \
--menu "Use [UP/DOWN] keys to move, then press enter \
\nFiles under directory $dirname:" 18 60 12 \
`cat temp2.$$` 2> file2delete.$$
else
dialog --backtitle "MENU DRIVEN PROGRAM" --title "Select File to Delete" \
--msgbox "\n\n There are no regular files in $dirname directory" 10 60
return
fi
rtval=$?
file2remove=`cat file2delete.$$`
case $rtval in
0) dialog --backtitle "MENU DRIVEN PROGRAM" --title "ARE YOU SURE" \
--yesno "\nDo you Want to Delete File: $file2remove" 7 70
if [ $? -eq 0 ]
then
rm -f $file2remove 2> Errorfile.$$
# Check file successfully deleted or not.
if [ $? -eq 0 ]
then
dialog --backtitle "MENU DRIVEN PROGRAM" \
--title "Information : FILE DELETED" \
--msgbox "\nFile : $file2remove deleted" 8 70
else
dialog --backtitle "MENU DRIVEN PROGRAM" \
--title "Information : ERROR ON DELETION" \
--msgbox "\nProblem in Deleting File: $file2remove \
\n\nError: `cat Errorfile.$$` \n\nPress ENTER to return to the Main Menu" 12 70
fi
else
dialog --backtitle "MENU DRIVEN PROGRAM" \
--title "Information : DELETION ABORTED" \
--msgbox "Action Aborted: \n\n $file2remove not deleted" 8 70
fi ;;
*) deletetempfiles # Remove temporary files
return ;;
esac
deletetempfiles # remove temporary files
return
}
########################## currentusers function ############################
currentusers()
{
who > userslist.$$
dialog --backtitle "MENU DRIVEN PROGRAM" \
--title "CURRENTLY LOGGED IN USERS LIST" \
--textbox userslist.$$ 12 60
}
############################ diskstats function #############################
diskstats()
{
df -h | grep "^/" > statsfile.$$
dialog --backtitle "MENU DRIVEN PROGRAM" \
--title "DISK STATISTICS" \
--textbox statsfile.$$ 10 60
}
##############################################################################
# MAIN STRATS HERE #
##############################################################################
trap 'deletetempfiles' EXIT # calls deletetempfiles function on exit
while :
do
# Dialog utility to display options list
dialog --clear --backtitle "MENU DRIVEN PROGRAM" --title "MAIN MENU" \
--menu "Use [UP/DOWN] key to move" 12 60 6 \
"DATE_TIME" "TO DISPLAY DATE AND TIME" \
"CALENDAR" "TO DISPLAY CALENDAR" \
"DELETE" "TO DELETE FILES" \
"USERS" "TO LIST CURRENTLY LOGGED IN USERS" \
"DISK" "TO DISPLAY DISK STATISTICS" \
"USERADD" "TO ADD NEW user" \
"USERDEL" "TO delete Old User" \
"EXIT" "TO EXIT" 2> menuchoices.$$
retopt=$?
choice=`cat menuchoices.$$`
case $retopt in
0) case $choice in
DATE_TIME) show_time ;;
CALENDAR) show_cal ;;
DELETE) deletefile ;;
USERS) currentusers ;;
DISK) diskstats ;;
USERADD) user_add;;
USERDEL) user_del;;
EXIT) clear; exit 0;;
esac ;;
*)clear ; exit ;;
esac
done
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