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Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxn!mhuxm!mhuxf!mhuxi!mhuxh!mhuxj!mhuhk!mhuxt!houxm!ho2cad!brf
From: brf@ho2cad.UUCP (Bruce Fowler)
Newsgroups: net.micro.att
Subject: Selective Backups on AT&T UNIX PC
Message-ID: <398@ho2cad.UUCP>
Date: Mon, 19-May-86 15:18:25 EDT
Article-I.D.: ho2cad.398
Posted: Mon May 19 15:18:25 1986
Date-Received: Fri, 23-May-86 05:46:36 EDT
Organization: AT&T Bell Laboratories, Holmdel
Lines: 197

=================================================================

	Here for your amusement and edification is a shell script
I put together that makes me sleep much better after powering down
the UNIX PC.  It may have application on 3B2s or other machines
that have big hard disks and small floppies.  There are a lot of
lines, but it should be easy to follow.  I would be happy to
answer any questions and/or incorporate your suggestions.

					Bruce Fowler
					{ihnp4}!ho2cad!brf
					AT&T-Bell Labs
					Holmdel, N. J.
 ____  ==> [ unzip here ]
|____)-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-8-

# This script handles all the chores associated with selective
# backups of PC7300 files to floppy disk.  The selection is based
# on subtree of the directory structure, and file size.  Maximum
# size files can be specified on a directory subtree basis.  By
# eliminating executables and such, useful backups will often fit on
# one disk.  Several floppies or sets of floppies are assumed to be
# used in rotation, so that the oldest set is rewritten with the new
# backup.  About 600 blocks of data will fit on one floppy.
# Optional command line args are explained below.  The usual
# is no args, which just does the backup.
#
# set pager to specified or system available one
if test "X$PAGER" = "X"
then
	PAGER=more
fi
# error check number of args
ARG1=$1
if test $# -gt 1
then
	ARG1=TOMANY	# force "usage" message
fi
# analyze arg, if any
OPT=BACKUP
if test $# -ge 1
then
	case $ARG1 in
	-e)	# edit values in ./.bkuprc file
		OPT=EDIT
	;;
	-l)	# list files that will be backed up
		OPT=LIST
	;;
	-x)	# list files excluded from back up
		OPT=EXCLUDE
	;;
	-r)	# restore data from the backup set.  (it may be
		# put into a different directory than it came from)
		OPT=RESTORE
	;;
	*)
		echo "usage: backup  (no args - backs up current directory)"
		echo "  -or: backup -e  (Edit values in ./.bkuprc file)"
		echo "  -or: backup -l  (List files that will be backed up)"
		echo "  -or: backup -x  (list files eXcluded from back up)"
		echo "  -or: backup -r  (Restore files to current directory)"
		echo
		exit 0
	;;
	esac
fi
# for restore, we can skip all the .bkuprc stuff
if test "$OPT" = "RESTORE"
then
	echo "Data will be restored to the current directory, which is"
	pwd
	echo "Please insert the first floppy of the backup set from which"
	echo "the data is to be restored."
	echo "Hit <return> when ready, or <q><return> to abort: \c"
	read RPLY
	if test "X$RPLY" = "X"
	then
		cpio -idB </dev/rfp021
		dismount -f
		sleep 5
		echo "O.K. - The restore is done."
		exit 0
	fi
fi
# see if ./.bkuprc file exists: if not, create one
NEWRC=NO
if test ! -f ./.bkuprc
then
	echo "This is the first backup from this directory level."
	NEWRC=YES
	echo "File to control selective backups." >./.bkuprc
	echo "BKBLK=40" >>./.bkuprc
	echo "FLOPS=3" >>./.bkuprc
	echo "NXDSK=1" >>./.bkuprc
	echo "Date of last backup - NONE" >>./.bkuprc
else
	tail -1 ./.bkuprc
fi
# suck the parameter values out of the file
BKBLK=`sed -n "/^BKBLK=/s///p" ./.bkuprc`
FLOPS=`sed -n "/^FLOPS=/s///p" ./.bkuprc`
NXDSK=`sed -n "/^NXDSK=/s///p" ./.bkuprc`
# edit the values in the ./.bkuprc file
if test "$OPT" = "EDIT" -o "$NEWRC" = "YES"
then
	echo "What is the largest file (in blocks) that you want backed up? \c"
	echo "[$BKBLK]: \c"
	read RPLY
	if test "X$RPLY" != "X"
	then
		BKBLK=$RPLY
	fi
	echo "How many sets of floppies will you use in rotation? \c"
	echo "[$FLOPS]: \c"
	read RPLY
	if test "X$RPLY" != "X"
	then
		FLOPS=$RPLY
	fi
	echo "Which of the sets of floppies will you start with? \c"
	echo "[$NXDSK]: \c"
	read RPLY
	if test "X$RPLY" != "X"
	then
		NXDSK=$RPLY
	fi
	# fit the data back out onto the ./.bkuprc file
	ed - ./.bkuprc <<-!EDFILE
		/^BKBLK=.*\$/s//BKBLK=$BKBLK/
		/^FLOPS=.*\$/s//FLOPS=$FLOPS/
		/^NXDSK=.*\$/s//NXDSK=$NXDSK/
		w
		q
		!EDFILE
fi
# list the files that qualify for backup
if test "$OPT" = "LIST"
then
	XBKUP=`expr $BKBLK + 1`
	find . -type f -size -$XBKUP -exec ls -sd {} \; | awk '
	BEGIN { bktot = 0; nfil = 0 }
	/ *[0-9]+/ { bktot += $1 ; nfil++ }
	{ print }
	END { print "There are a total of " nfil " files"
	      print "not larger than " maxblk " blocks."
	      print "These files total to " bktot " blocks." }' \
	maxblk=$BKBLK - | $PAGER
fi
# list the files that will be excluded from backup
if test "$OPT" = "EXCLUDE"
then
	find . -type f -size +$BKBLK -exec ls -sd {} \; | awk '
	BEGIN { bktot = 0; nfil = 0 }
	/ *[0-9]+/ { bktot += $1 ; nfil++ }
	{ print }
	END { print "There are a total of " nfil " files"
	      print "larger than " maxblk " blocks."
	      print "These files total to " bktot " blocks." }' \
	maxblk=$BKBLK - | $PAGER
fi
# finally, if all else fails, DO THE BACKUP !!!
if test "$OPT" = "BACKUP"
then
	echo "Please put a floppy to be written in the disk drive."
	echo "You should use the first floppy in set number $NXDSK"
	echo "of the $FLOPS sets being used to backup directory"
	pwd
	echo "Hit <return> when ready, or <q><return> to abort: \c"
	read RPLY
	if test "X$RPLY" = "X"
	then
		echo "\n\n		>>> BACKUP IN PROGRESS <<<\n\n"
		XBKUP=`expr $BKBLK + 1`
		find . -type f -size -$XBKUP -print |
			cpio -oB >/dev/rfp021
		dismount -f
		# cycle the number of the floppy set for the next rotation
		if test $NXDSK -lt $FLOPS
		then
			NXDSK=`expr $NXDSK + 1`
		else
			NXDSK=1
		fi
		# update the .bkuprc file
		ed - ./.bkuprc <<-!EDFILE
			/^NXDSK=.*\$/s//NXDSK=$NXDSK/
			/^Date.*\$/s//Date of last backup - `date`/
			w
			q
			!EDFILE
		sleep 5
		echo "O.K. - Haul out the floppy, we're done!"
	else
		echo "Backup request not performed"
	fi
fi