#! /bin/bash
#
# 'saveconfig'
#
# - writes important configuration data to USB stick
# - archives important configuration files to USB stick
#
# Note: - a few files/commands are only accessible as root.
#       - most file locations here "should be" LSB compliant
#
# -------------------------------------------------------------------
# Creation: 2000-04-20, JHa.
# Revision: 2001-01-07, JHa (sorted & multicolumn rpm output)
#           2001-11-04, JHa (adjusted for new directory structure)
#           2002-09-29, JHa (some changed file locations)
#           2004-12-29, JHa (some changed file locations)
#           2005-05-21, JHa (now /media/floppy)
#           2006-12-26, JHa (updated file list; now allows other media)
#           2007-12-21, JHa (misc updates; saves to usb)
#           2011-01-01, JHa (complete rewrite in bash)
# -------------------------------------------------------------------
# Copyright (c) 2000-2011 Joerg Hau <joerg.hau.at.dplanet.ch>.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of version 2 of the GNU General Public
# License as published by the Free Software Foundation, provided
# that the copyright notice remains intact even in future versions.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# -------------------------------------------------------------------


# ------------------------------------------------------------
# subroutine to check error status of last command
# argument: error message
# will exit with rc=1 if errorlevel was not 0
# ------------------------------------------------------------
function errcheck()
{
if [ $? != 0 ]; then
    echo "Abort: $1, status: $?"
    exit 1
fi
}


# ------------------------------------------------------------
# subroutine to print usage mode
# ------------------------------------------------------------
function usage()
{
cat << eof

${0##*/} -  Extract and save system configuration data.

Copyright (c) 2000...2011 Joerg Hau <joerg.hau(at)sunrise.ch>.

This program is free software; you can redistribute it and/or
modify it under the terms of version 2 of the GNU General Public
License as published by the Free Software Foundation.

This program is distribute[ -z $DEST ] || errcheck "You must specify the destination directory."d in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

Usage: ${0##*/} /path/to/save-directory

eof
}


#
# === main script starts here ===
#


# see if you have the right to access all this stuff
# 
if [ `whoami` != 'root' ]; then
    echo "You must be root to run this script."
    exit 2
fi

# if script is called w/o arguments, give usage instructions
# 
if (( $# < 1 )) ;  then
    usage
    exit 1
fi


# DEST was passed as an argument on the command line
#
DEST="$1"

[ -d $DEST ]  || errcheck "Directory '$DEST' does not exist"
[ -r $DEST ]  || errcheck "Directory '$DEST' exists but is not writeable"

# Get the system name (without domain suffix)
#
HOST=${HOSTNAME%%.*}

# derive archive basename from system name and actual date (not time)
#
ARCH=$HOST.`date +%Y%m%d`

LOGFILE=$DEST/$ARCH.txt

# Prepare a file containig the names of files and directories to be archived
#
LISTFILE="/tmp/temp.$$"

echo "--- Going to save configuration data and files to $DEST ---"

########################################################################
# Part I : extract configuration data and write them into a text file
########################################################################

# list of files to print
#
filelist="/etc/fstab    \
    /etc/init.d/boot.local \
    /boot/grub/menu.lst   \
    /etc/crontab          \
    /etc/dhcpd.conf    \
    /etc/ntp.conf     \
    /etc/hosts /etc/hosts.equiv      \
    /etc/hosts.allow /etc/hosts.deny \
    /etc/hosts.equiv /etc/hosts.lpd  \
    /etc/exports /etc/resolv.conf   \
    /etc/printcap /etc/ppp/options"

# Here we go ...
#
echo "==================================================================" > $LOGFILE
echo "Configuration of $HOST, as of "`date`"." >> $LOGFILE
echo "==================================================================" >> $LOGFILE
echo "" 					            >> $LOGFILE
echo "----- Output of 'uname -a' -----"	>> $LOGFILE
/bin/uname -a 					        >> $LOGFILE
echo ""				 		            >> $LOGFILE

echo " " 					            >> $LOGFILE
echo "----- Output of 'fdisk -l' -----" >> $LOGFILE
/sbin/fdisk -l 					        >> $LOGFILE
echo " "					            >> $LOGFILE

echo " "					            >> $LOGFILE
echo "----- Disk usage -----"			>> $LOGFILE
/bin/df -h					            >> $LOGFILE
echo " "					            >> $LOGFILE

echo " "					            >> $LOGFILE
echo "----- Networking -----"			>> $LOGFILE
/sbin/ifconfig					        >> $LOGFILE
echo " "					            >> $LOGFILE

echo " "                                >> $LOGFILE
echo "----- Running Services -----"     >> $LOGFILE
/sbin/chkconfig --list|grep ":on"       >> $LOGFILE
echo " "                                >> $LOGFILE

for i in $filelist; do 
	echo " "				            >> $LOGFILE
	echo "----- "$i " -----"		    >> $LOGFILE
	# 1st grep removes comment lines (starting with #)
	# 2nd removes empty lines
	grep -v "^#" $i | grep -v ^$ 		>> $LOGFILE
  	echo " "				            >> $LOGFILE
done

echo " "                                >> $LOGFILE
echo "----- iptables-save -----"        >> $LOGFILE
iptables-save                           >> $LOGFILE
echo " "                                >> $LOGFILE

echo " "                                >> $LOGFILE
echo "----- ip6tables-save -----"       >> $LOGFILE
ip6tables-save                          >> $LOGFILE
echo " "                                >> $LOGFILE

echo " "                                >> $LOGFILE
echo "----- /etc/modprobe.d/ -----"     >> $LOGFILE
ls /etc/modprobe.d/                     >> $LOGFILE
echo " "                                >> $LOGFILE

echo " "					            >> $LOGFILE
echo "----- rpm packages installed -----"	>> $LOGFILE
/bin/rpm -qa | sort | pr -3 -l 1		>> $LOGFILE
echo " "					            >> $LOGFILE

echo " "                                >> $LOGFILE
echo "----- Listing of '/usr/local/bin' -----"   >> $LOGFILE
ls /usr/local/bin | pr -3 -l 1          >> $LOGFILE
echo " "                                >> $LOGFILE

echo " "                                >> $LOGFILE
echo "----- Listing of '/usr/local/src' -----"   >> $LOGFILE
ls /usr/local/src | pr -3 -l 1          >> $LOGFILE
echo " "                                >> $LOGFILE

echo " "                                >> $LOGFILE
echo "----- Listing of '/opt' -----"   >> $LOGFILE
ls /opt | pr -3 -l 1                    >> $LOGFILE
echo " "                                >> $LOGFILE

echo "System configuration log written to $LOGFILE."


########################################################################
# Part II: tar the configuration files to $DEST
########################################################################

# create $LISTFILE ...
#
echo "/etc/fstab
/etc/passwd
/etc/group
/etc/sysconfig/
/etc/init.d/
/etc/profile.local
/etc/X11/
/etc/crontab
/etc/xinetd.conf
/etc/xinetd.d
/etc/services
/etc/dhcp.conf
/etc/ntp.conf
/etc/resolv.conf
/etc/nsswitch.conf
/etc/samba/
/etc/httpd/
/boot/grub/menu.lst
/etc/modprobe.d/
/etc/hosts
/etc/hosts.equiv
/etc/hosts.allow
/etc/hosts.deny
/etc/hosts.equiv
/etc/hosts.lpd
/etc/exports
/etc/networks
/etc/printcap
/etc/ppp/" > $LISTFILE

echo "Archiving configuration data of $HOST to $DEST/$ARCH.tgz ..."

# We do NOT use absolute pathnmames. This is safer on extraction,
# as you will have to be in '/' to accidently overwrite files ;-)
#
tar -czf $DEST/$ARCH.tgz -T $LISTFILE

# no error check here; we do not want to interrupt the script
# if some file is not present on the system.

# Note: With these files, you may want to use interactive mode
# while extracting, this is 'tar xwzf /floppy/archivename'.
# (Extraction is relative to your actual directory).

echo "Configuration files copied."
rm $LISTFILE
exit 0