#!/bin/bash
#
# $Header: /CVSROOT/public/scylla-charybdis/md5backup/bin/backup.sh,v 1.11 2004/09/28 23:52:52 tino Exp $
#
# PLEASE NOTE THAT THE CORRESPONDING RESTORE STILL IS MISSING!
#
# This is *my* backup script for Linux.
# It backs up all files *except* /proc, /var/lib/mysql and following mounts:
#
# /backup
# /mnt
# everything below /mnt/
#
# You can backup mounts by explicitely stating them on the command line,
# however this only backs up what you give on the command line.
#
# Output is written to /backup/md5backup/
# (this is why /backup is expected to be a mount)
#
# If you create directories /backup/md5backup/ln*
# then new output is hardlinked there, too ('=' feature of md5backup).
#
# Ignores can be added to directory /backup/md5backup/ign/
# either as softlinks to dir/file or files which contain the ignore list
# ('-' feature of md5backup).
#
# -Tino
#
# $Log: backup.sh,v $
# Revision 1.11  2004/09/28 23:52:52  tino
# iso9660 and loopback filesystems are now ignored
#
# Revision 1.10  2004/08/31 00:05:19  tino
# improved hostname detection
#
# Revision 1.9  2004/07/03 12:55:03  tino
# working version commit
#
# Revision 1.8  2004/06/18 23:51:16  tino
# see ChangeLog
#
# Revision 1.7  2004/05/01 04:38:39  tino
# sigh, forgot to take out a debug echo
#
# Revision 1.6  2004/05/01 04:37:36  tino
# now it works as expected
#
# Revision 1.5  2004/05/01 02:15:01  tino
# New feature: +/PATH/
#
# Revision 1.4  2004/04/24 01:10:46  tino
# Intermediate version, I start to implement linked file store now
#
# Revision 1.3  2004/01/11 20:29:29  tino
# Release candidate: Added features:
# Autoignore and stay in local filesystem
#
# Revision 1.2  2004/01/07 12:05:09  tino
# Scripts improved, some spelling corrections, and CVS headers added.
# md5backup.c now has a sanity check which slows down things factor 10.

MD5BACKUPWORKDIR=/backup/md5backup

getpath()
{
( cd "`dirname "$0"`"; cd "`/bin/pwd`"; cd "$1"; /bin/pwd; )
}

MD5BACKUP="`getpath ..`/md5backup"
if [ ! -x "$MD5BACKUP" ]
then
	echo "cannot locate md5backup utility: $MD5BACKUP" >&2
	exit 1
fi

backupper()
{
#echo "call: $*"; exit 1
i=0
a=""
while	let i=i+1
	[ $i -le $# ]
do
	eval v=\"\$$i\"
	a="$a \"\$$i\""
done
# moved this into a file as it can become quite big
# YESSSSS, I do not support linefeeds in names.
# Use a ign-softlink for that with some proper name, ok?
targs="$MD5BACKUPWORKDIR/tmp/targetlist.$$"
> "$targs"
for b in $MD5BACKUPWORKDIR/ln*
do
	[ -d "$b" ] &&
	echo "=$b" >> "$targs"
done
for b in $MD5BACKUPWORKDIR/ign/* /var/lib/mysql /proc
do
	if [ -f "$b" -a ! -L "$b" ]
	then
		# only transport lines which start with a /
		# this way you can comment out things easily
		# Note that I do not want you to add includes,
		# as this has surprising results (adds instead removes)
		sed -n 's|^/|-/|p' "$b" >> "$targs"
	elif [ -r "$b" ]
	then
		echo "-$b" >> "$targs"
	fi
done
#cat "$targs"
# Works with Network
HOST="`hostname -f`"
# Works with Hostname set
[ -z "$HOST" ] && HOST="`hostname`"
# Last resort
[ -z "$HOST" ] && HOST="`cat /etc/hostname`"
if [ -z "$HOST" ]
then
	echo "cannot detect your hostname (Hint: vi /etc/hostname)" >&2
	exit 1
fi
eval \"\$MD5BACKUP\" $MD5BACKUPWORKDIR/ \"\$HOST\" \"@\$targs\" $a
rm -f "$targs"
}

allfs()
{
{
echo /backup
awk '/^nodev/	{ print $2 }' /proc/filesystems
echo iso9660
} |
awk 'END { while (("mount" | getline)>0)
             if ($3~/^[/]/ && !ign[$5] && !ign[$3] && $3!~/^\/mnt\// && $6!~/loop=/)
               print $3;
         }
{ ign[$1]=1; }'
}

if [ 0 = $# ]
then
	backupper `allfs`
else
	backupper "$@"
fi