datetime

<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 = "@(#)datetime	4.1	(ULTRIX)	7/27/90"
#
#	000	Jonathan Wallace	1-Jun-1990
#
########################################################################
#
#
LL="
"
trap 'exit' 1 2 3 18

: Check_Date_Routine
Check_Date_Routine()
{
	DATETIME=$1
	DATE=`expr $DATETIME : '\([0-9][0-9][0-9][0-9][0-9][0-9]\)'`
	YY=`expr $DATE : '\([0-9][0-9]\)'`
	MM=`expr $DATE : '[0-9][0-9]\([0-9][0-9]\)'`
	DD=`expr $DATE : '.*\([0-9][0-9]\)'`
	TIME=`expr $DATETIME : '.*\([0-9][0-9][0-9][0-9]\)'`
	HH=`expr $TIME : '\([0-9][0-9]\)'`
	MI=`expr $TIME : '[0-9][0-9]\([0-9][0-9]\)'`
	CYEAR=`date +%y`
	set Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
	shift `expr $MM - 1`
	MMM=$1

	if [ $YY -lt 70 ]
	then
		clear
		echo
		echo "Sorry, you cannot enter any date earlier than 1970."
		return 1
	fi

	case $YY in
	$CYEAR )
		;;
	* )
		clear
		echo "
*** DATE AND TIME SPECIFICATION ***

Warning:  Making date and time changes of more than a few minutes using
this utility is not recommended.  For making large date and time changes,
it is recommended that you shut down the system to single user mode, and
then use the date (8) command to make the actual date/time change.

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


clear
while : true
do
	echo "
*** DATE AND TIME SPECIFICATION ***

The current system date and time is `date`.


The date and time should be specified using the following format:

	yymmddhhmm

Use two digits for year (yy), month (mm), day (dd), hour (hh), and
minute (mm).  Enter the time in 24-hour format.  For example, 11:30
p.m. on May 3, 1990 would be entered as:

	9005032330

Enter the date and time: \c"
	read tnc
	case $tnc in
	T) 	
		echo "
The system date and time is now set to `date`.
Is this correct? (y/n) [y]: \c"
		read resp
		case $resp in
		"" | [Yy]* )
			break
			;;
		* )
			clear
			;;
		esac
   		;;
	"")
		clear
   		;;
	[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9])
		Check_Date_Routine $tnc
		case $? in
		1 )
			continue
			;;
		esac
		date $tnc > /dev/null 
 		case $? in 
 		0 )
			echo "
The system date and time is now set to `date`.
Is this correct? (y/n) [y]: \c"
			read resp
			case $resp in
			"" | [Yy]* )
				break
				;;
			* )
				clear
				;;
			esac
			;;
 		* )
			clear
			echo "${LL}Sorry, '${tnc}', is not a valid date entry."
			;;
 		esac
  		;;
	* )
		clear
		echo "${LL}Sorry, '${tnc}', is not a valid date entry."
		;;
	esac
done