modemsetup

<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 = "@(#)modemsetup	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 -h
trap 'Original_State_Routine; exit 1' 1 2 3 18
LL="
"
SWITCH=$1
TTD=$2
TTY=`expr $TTD : '.*\([0-9]\)'`
TTY=tty0$TTY
MVFLG=0
ED_ERROR="

Errors occured while attempting to edit the terminal initialization
file /etc/ttys during this procedure. A temporary error file called
/usr/tmp/ed_errs is created to trap any errors that might occur while
attempting to add a terminal device using this procedure. Check
/usr/tmp/ed_errs to determine the nature of the error, and then check
/etc/ttys to see if a valid entry was made for tty00. Refer to the
Guide to System Environment Setup for more information about the
terminal initialization file /etc/ttys, it's format, and description 
of it's entries; or contact your system administrator."

###################
# SH5 Subroutines #
###################
#############################################################
#
: Error_Routine - error handler from tty_stat program
#
# Return Code	Meaning
#	0	Success
#	1	Generic Failure
#	2	Undefined
#	3	grep failed to find tty in /etc/ttys
#	4	more than one tty entry in /etc/ttys
#	5	tty entry already turned on in /etc/ttys
#
#############################################################
Error_Routine()
{
	case $1 in
	3 )
		clear
		echo "
$PROCEDURE_NAME

Line $TTD does not exist in /etc/ttys file.  Check the file for
corruption by refering to the Guide to System Environment Setup,
Terminal Initialization File section.  

Press <RETURN> to continue: \c"
		read resp
		return 1
		;;
	4 )
		clear
		echo "
$PROCEDURE_NAME

$TTD is defined more than once in the /etc/ttys file.
________________________________________________________________________________"
		cat /usr/tmp/tty_lines
		echo "_______________________________________________________________________________

This causes unpredictable results and is unsupported by this
procedure.  You may want to take corrective action by manually
editing the Terminal Initialization File /etc/ttys refering to
the Guide to System Environment Setup, Terminal Initialization
File section, for information about it's format, and description
of it's entries; or contact your system administrator.

Press <RETURN> to continue: \c"
		read resp
		return 1
		;;
	5 )
		TTD_ERROR=`cat /usr/tmp/tty_stat`
		while :
		do
			clear
			echo "
$PROCEDURE_NAME

Line $TTD has already been activated for the following use:

	$TTD - $TTD_ERROR

If you want to override the current $TTD entry in /etc/ttys
and create a new modem line on $TTD anyway, type 'y' to the
confirmation request below. 

Do you want to override the current $TTD entry? (y/n) [n]: \c"
			read resp
			case $resp in
			[Nn]* | "" )
				return 1
				;;
			[Yy]* )
				return 0
				;;
			* )
				;;
			esac
		done
		;;
	* )
		clear
		echo "
$PROCEDURE_NAME

Line $TTD is in an unknown state.  Check the entries of line $TTD
in /etc/ttys by refering to the Guide to System Environment Setup,
Terminal Initialization File section.

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

}


###########################################################
: Baud_Rate_Routine - User selects type of terminal to add
###########################################################
Baud_Rate_Routine()
{
	while :
	do
		clear
		echo "
$PROCEDURE_NAME

Select a baud rate below, that matches the baud
rate of the modem you will be using:

	1 - 300
	2 - 1200
	3 - 2400

	0 - None of the above

Enter your choice [3]: \c"
		read resp
		case $resp in
		0 )
			exit 0
			;;
		1 )
			BAUD=300
			break
			;;
		2 )
			BAUD=1200
			break
			;;
		"" | 3 )
			BAUD=2400
			break
			;;
		* )
			;;
		esac
	done
}


#################################################
: Modem_On_Routine - Turn on modem in ttys
#################################################
Modem_On_Routine()
{
	clear
	echo "
$PROCEDURE_NAME

Creating modem line on $TTD.....\c"

	ed - /etc/ttys <<xxEOFxx >/usr/tmp/ed_errs
	/^$TTD/d
	i
$TTD	"/etc/getty std.$BAUD"	dialup	on shared secure	#modem line
.
	w
	q
xxEOFxx

	if [ -s /usr/tmp/ed_errs ]
	then
		echo "Error creating modem line! $ED_ERROR"
		Original_State_Routine
	else
		kill -1 1
		echo "done."
	fi

	echo "${LL}Press <RETURN> to continue: \c"
	read resp
}


###################################################
: Modem_Off_Routine - Turn off terminal in ttys
###################################################
Modem_Off_Routine()
{
	clear
	echo "
$PROCEDURE_NAME

Removing modem line on $TTD.....\c"

	ed - /etc/ttys <<xxEOFxx >/usr/tmp/ed_errs
	/^$TTD/d
	i
$TTD	"/etc/getty std.9600"	vt100	off shared secure	#modem line
.
	w
	q
xxEOFxx

	if [ -s /usr/tmp/ed_errs ]
	then
		echo "Error removing modem line! $ED_ERROR"
	else
		kill -1 1
		echo "done."
	fi

	echo "${LL}Press <RETURN> to continue: \c"
	read resp
}


##########################################################
: File_Check_Routine - Make sure proper files are around.
##########################################################
File_Check_Routine()
{
	if [ ! -c /dev/$TTD ]
	then
		if [ ! -c /dev/$TTY ]
		then
			clear
			echo "
$PROCEDURE_NAME

A file consistency check was unable to locate the file '/dev/$TTD'
which is required in order to set up or use modem lines on this
machine.  

Check the '/dev' directory to verify whether '/dev/$TTD' actually
exists.  If it does not, refer to the MAKEDEV(8) manpage, or contact
your system administrator.

Press <RETURN> to continue: \c"
			read resp
			exit 1
		else
			MVFLG=1
			mv /dev/$TTY /dev/$TTD
			chmod 666 /dev/$TTD
		fi
	fi
}


###############################################################
: Original_State_Routine - Return /dev files to previous state
###############################################################
Original_State_Routine()
{
	case $MVFLG in
	1 )
		mv /dev/$TTD /dev/$TTY 2>/dev/null
		chmod 640 /dev/$TTY 2>/dev/null
		MVFLG=0
		;;
	esac
}


###########################################################
# MAIN PROGRAM PROCEDURE ROUTINE #
##################################
while :
do
	case $SWITCH in
	-A )
		PROCEDURE_NAME="*** Modem Line Creation Procedure ***"
		tty_scan $TTD
		case $? in
		0 )
			;;
		* )
			Error_Routine $?
			case $? in
			1 )
				exit 1
				;;
			esac
			;;
		esac
		Baud_Rate_Routine
		File_Check_Routine
		Modem_On_Routine
		break
		;;
	-R )
		PROCEDURE_NAME="*** Modem Line Removal Procedure ***"
		tty_scan $TTD
		case $? in
		0 | 5 )
			;;
		* )
			Error_Routine $?
			case $? in
			1 )
				exit 1
				;;
			esac
			;;
		esac
		Modem_Off_Routine
		break
		;;
	esac
done

exit 0