backitup

<B>Digital的Unix操作系统VAX 4.2源码</B>

#!/bin/sh5
########################################################################
#
#			Copyright (c) 1988, 1989 by
#		Digital Equipment Corporation, Maynard, MA
#			All rights reserved.
#
#	This software is furnished under a license and may be used and
#	copied  only  in accordance with the terms of such license and
#	with the  inclusion  of  the  above  copyright  notice.   This
#	software  or  any  other copies thereof may not be provided or
#	otherwise made available to any other person.  No title to and
#	ownership of the software is hereby transferred.		
#
#	The information in this software is subject to change  without
#	notice  and should not be construed as a commitment by Digital
#	Equipment Corporation.					
#
#	Digital assumes no responsibility for the use  or  reliability
#	of its software on equipment which is not supplied by Digital.
#
#	SCCSID = "@(#)backitup	4.2	(ULTRIX)	8/5/90"
#
#	000	Jonathan Wallace	1-Jun-1990
#
#
#	001	James C. Overman	05-Aug-1990
#	    Moved references to /tmp to /usr/tmp 
#	    
########################################################################
#
#
#############################################
# Set variables, constants, and environment #
#############################################
set -h
trap 'Cleanup_Routine; exit 1' 0 1 2 3 18
LL="
"


########################################################################
# Subroutines #
###############
#####################################
: Cleanup_Routine - Remove usr/tmp files
#####################################
Cleanup_Routine()
{
	rm -f /usr/tmp/DEV.list /usr/tmp/DEV.menu 
	rm -f /usr/tmp/MFS.list /usr/tmp/MFS.menu
}


#####################################################################
: Select_Device_Routine
#
#	RETURN CODES
#		0 - Successful 
#		1 - Error that warrants termination of program
#		3 - Input error (call function again)
#		5 - User Termination (selected "none of the above")
#
#####################################################################
Select_Device_Routine()
{
	[ -s /usr/tmp/DEV.menu ] ||
	{
		clear
		echo "${LL}*** SYSTEM BACKUP PROCEDURE ***"
		echo "	Working ... `date` \c"
        	echo "
*** SYSTEM BACKUP PROCEDURE ***

Select the backup device from the menu below: ${LL}" >/usr/tmp/DEV.menu
		X=0
		FOUNDFLAG=0
		for K in /dev/rmt*
		do
			FI=`file $K`
			FI=`expr "$FI" : '\(.*\)tape'`
			FI=`expr "$FI" : '.*[#][0-9][0-9]*\(.*\)'`
			case $? in
			0 )
				X=`expr $X + 1`
				case $X in
				[0-9])
					X=" $X"
					;;
				esac
				FOUNDFLAG=1
				echo "$K" >>/usr/tmp/DEV.list
				echo "	${X} - $K$FI Tape" >>/usr/tmp/DEV.menu
				;;
			esac
		done

		case $FOUNDFLAG in
		1 )
			NODEV=`expr $X + 1`
			case $NODEV in
			[0-9])
				NODEV=" $NODEV"
				;;
			esac
			echo "	${NODEV} - None of the above" >>/usr/tmp/DEV.menu
			;;
		* )
			clear
			echo "
*** SYSTEM BACKUP PROCEDURE ***

No valid backup devices found on this machine.  Check to make sure a
backup device is actually connected to the machine, or contact your
system administrator.

Press <RETURN> to continue: \c"
			read resp
			return 1
			;;
		esac
	}


	clear
        more /usr/tmp/DEV.menu
        echo "${LL}Enter your choice [1]: \c"
        read DEVNUM
        case $DEVNUM in
        "" )
                DEVNUM=1
		return 0
                ;;
	[0-9] | [0-9][0-9] | [0-9][0-9][0-9] )
		[ $DEVNUM -eq $NODEV ] && return 5
                [ $DEVNUM -gt $NODEV ] &&
		{
			echo "${LL}Invalid Choice: $I (out of range)"
			echo "Press <RETURN> to continue: \c"
			read resp
			return 3
		}
		return 0
		;;
        * )
		return 3
                ;;
        esac
}


#######################################################
: Get_Device_Routine -
#######################################################
Get_Device_Routine()
{
	X=0
	set - `cat /usr/tmp/DEV.list`
	while [ $# -gt 0 ]
	do
		X=`expr $X + 1`
		case $X in
		$DEVNUM )
			DEVICE=$1
			return 0
			;;
		* )
			shift
			;;
		esac
	done

	return 1
}


#####################################################################
: Select_FS_Routine
#
#	RETURN CODES
#		0 - Successful 
#		1 - Error that warrants termination of program
#		3 - Input error (call function again)
#		5 - User Termination (selected "none of the above")
#
#####################################################################
Select_FS_Routine()
{
	[ -s /usr/tmp/MFS.menu ] ||
	{
		clear
		echo "${LL}*** SYSTEM BACKUP PROCEDURE ***"
		echo "	Working ... `date` \c"
		echo "
*** SYSTEM BACKUP PROCEDURE ***

Select the file system(s) you want to backup from the menu below: 

 Selection	Device			File System
 -----------------------------------------------------------------------------" >/usr/tmp/MFS.menu
	        X=0
		SP="                                     "
		FW="................"
		MENNUM=
		FOUNDFLAG=0
		mount | grep "^\/dev" >/usr/tmp/MFS.list
		set xxx `cat /usr/tmp/MFS.list`
		while [ $# -gt 0 ]
		do
			case $1 in
			/dev* )
				X=`expr $X + 1`
				MENNUM="$MENNUM $X"
				case $X in
				[0-9])
					X=" $X"
					;;
				esac
				FOUNDFLAG=1
				FORMAT="$1$SP"
				FORMAT=`expr "$FORMAT" : '\('$FW'\).*'`
				echo "    $X		$FORMAT	$3" >>/usr/tmp/MFS.menu
				shift
				;;
			* )
				shift
				;;
			esac
		done
	
		case $FOUNDFLAG in
		1 )
			ALLNUM=`expr $X + 1`
			NONUM=`expr $ALLNUM + 1`
			case $ALLNUM in
			[0-9])
				ALLMEN=" $ALLNUM"
				;;
			* )
				ALLMEN=$ALLNUM
				;;
			esac
			case $NONUM in
			[0-9])
				NOMEN=" $NONUM"
				;;
			* )
				NOMEN=$NONUM
			esac

			echo "
    ${ALLMEN}		All of the above
    ${NOMEN}		None of the above
 -----------------------------------------------------------------------------" >>/usr/tmp/MFS.menu
			;;
		* )
			clear
			echo "
*** SYSTEM BACKUP PROCEDURE ***

No locally mounted file systems found on this machine.  This procedure
does not support backups of remotely mounted file systems.  Read the
Guide to Backup and Restore for information about backing up remotely
mounted file systems, or contact your system administrator.

Press <RETURN> to continue: \c"
			read resp
			return 1
			;;
		esac
	}

	clear
	more /usr/tmp/MFS.menu
	echo "${LL}Enter your choice(s), for example, 1 2 : \c"
	read FS_SELECTIONS
	case $FS_SELECTIONS in
	"" )
		return 3
		;;
	$NONUM )
		return 5
		;;
	* )
		return 0
		;;
	esac
}


############################################
: Sort_Routine - Sort the input by the user
#
#	RETURN CODES
#		0 - Successfull 
#		1 - Error
#
############################################
Sort_Routine()
{
	NONE=$1
	SORTED=
	set - $FS_SELECTIONS
	for I in $FS_SELECTIONS
	do
		# is it a number?
		J=`expr $I : '\([0-9][0-9]*\)'`

		case $I in
		$J)	;;
		*)	echo "${LL}Invalid choice: $I (not a number)"
			return 1
			;;
		esac

		# is it in range?
		[ $I -gt $NONE ] &&
		{
			echo "${LL}Invalid Choice: $I (out of range)"
			return 1
		}

		HI=$SORTED LO=
		# insert # into sorted list...
		for J in $SORTED
		{
			case "$I" in
			$J)	I=
				break
				;;
			esac
			if [ $I -gt $J ]
			then
				LO="$LO $J"
				set xx $HI
				shift;shift
				HI=$*
			else
				break
			fi
		}
		SORTED="$LO $I $HI"
	done
}


###############################
: Verify_Choice_Routine
###############################
Verify_Choice_Routine()
{
	clear
	BACKUPLIST=
	case $FS_SELECTIONS in
	$ALLNUM )
		SORTED=$MENNUM
		;;
	esac
		
	echo "
You want to backup the following filesystems:

	Device		 File System
------------------------------------------------------------------------------"
	for K in $SORTED
	do
		X=0
		set xxx `cat /usr/tmp/MFS.list`
		while [ $# -gt 0 ]
		do
			case $1 in
			/dev* )
				X=`expr $X + 1`
				case $K in
				$X )
					BACKUPLIST="$BACKUPLIST $1 $3"
					FORMAT="$1$SP"
					FORMAT=`expr "$FORMAT" : '\('$FW'\).*'`
					echo "	$FORMAT $3" 
					continue 2
					;;
				* )
					shift
					;;
				esac
				;;
			* )
				shift
				;;
			esac
		done
	done
	echo "------------------------------------------------------------------------------"
	echo "${LL}Is this correct? (y/n) [y]: \c"
	read resp
	case $resp in
	"" | [Yy]* )
		return 0
		;;
	[Nn]* )
		return 1
		;;
	* )
		Verify_Choice_Routine
		;;
	esac
}

###########################################
: Backup_Routine - Do the actual backup
###########################################
Backup_Routine()
{
	set - $BACKUPLIST
	while [ $# -gt 0 ]
	do
		clear
		echo "
*** SYSTEM BACKUP PROCEDURE ***

Backing up $2, mounted on $1

Please put a backup tape in $DEVICE, then make sure that the
tape is write enabled, and that the tape drive is on-line.  Press
<RETURN> when ready: \c"
		read resp
		echo
		dump 0uf $DEVICE $1
		case $? in
		1 )
			echo "${LL}Press <RETURN> to continue: \c"
			read resp
			shift 2
			continue
			;;
		* )
			echo "
*** SYSTEM BACKUP PROCEDURE ***

An error has occured while attempting to backup file system

	$2

located on device $1.  Check the Guide to System Backup and
Restore for more information on system backup procedures, or
contact your system administrator. 

Press <RETURN> to continue: \c"
			read resp
			return 1
			;;
		esac
	done

	return 0
}


###########################################
# Program Procedure Routine
###########################################
while :
do
	Select_Device_Routine
	case $? in
	0 ) 
		Get_Device_Routine
		break
		;;
	1 ) exit 1 ;;
	3 ) continue ;;
	5 ) exit 0 ;;
	esac
done

while :
do
	Select_FS_Routine
	case $? in
	0 ) 
		Sort_Routine $NONUM
		case $? in
		1 )
			echo "${LL}Press <RETURN> to re-enter choice(s): \c"
			read resp
			continue
			;;
		esac
		Verify_Choice_Routine
		case $? in
		0 )
			break
			;;
		1 )
			continue
			;;
		esac
		;;
	1 ) exit 1 ;;
	3 ) continue ;;
	5 ) exit 0 ;;
	esac
done

Backup_Routine
case $? in
0 )
	exit 0
	;;
1 )
	exit 1
	;;
esac