#!/bin/sh
#
# config3270 -- Autoconfigure /dev/3270/* and /etc/inittab
#
#       Usage:
#               config3270
#
#       Output:
#               /tmp/mkdev3270
#
#       Operation:
#               1. Run this script
#               2. Run the script it produces: /tmp/mkdev3270
#               3. Issue "telinit q" or reboot, as appropriate.
#
setglobal P = '/proc/tty/driver/tty3270'
setglobal ROOT = ''
setglobal D = "$ROOT/dev"
setglobal SUBD = '3270'
setglobal TTY = "$SUBD/tty"
setglobal TUB = "$SUBD/tub"
setglobal SCR = "$ROOT/tmp/mkdev3270"
setglobal SCRTMP = "$SCR.a"
setglobal GETTYLINE = ':2345:respawn:/sbin/mingetty'
setglobal INITTAB = "$ROOT/etc/inittab"
setglobal NINITTAB = "$ROOT/etc/NEWinittab"
setglobal OINITTAB = "$ROOT/etc/OLDinittab"
setglobal ADDNOTE = ''\'"# Additional mingettys for the 3270/tty* driver, tub3270 ---'\\"

if ! ls $P > /dev/null !2 > !1 {
	modprobe tub3270 > /dev/null !2 > !1
}
ls $P > /dev/null !2 > !1 || exit 1

# Initialize two files, one for /dev/3270 commands and one
# to replace the /etc/inittab file (old one saved in OLDinittab)
echo "#!/bin/sh" > $SCR || exit 1
echo " " >> $SCR
echo "# Script built by /sbin/config3270" >> $SCR
if test ! -d /dev/dasd {
	echo rm -rf "$D/$SUBD/*" >> $SCR
}
echo "grep -v $TTY $INITTAB > $NINITTAB" > $SCRTMP || exit 1
echo "echo $ADDNOTE >> $NINITTAB" >> $SCRTMP
if test ! -d /dev/dasd {
	echo mkdir -p $D/$SUBD >> $SCR
}

# Now query the tub3270 driver for 3270 device information
# and add appropriate mknod and mingetty lines to our files
echo what=config > $P
while read devno maj min{
	if test $min = 0 {
		setglobal fsmaj = $maj
		if test ! -d /dev/dasd {
			echo mknod $D/$TUB c $fsmaj 0 >> $SCR
			echo chmod 666 $D/$TUB >> $SCR
		}
	} elif test $maj = CONSOLE {
		if test ! -d /dev/dasd {
			echo mknod $D/$TUB$devno c $fsmaj $min >> $SCR
		}
	} else {
		if test ! -d /dev/dasd {
			echo mknod $D/$TTY$devno c $maj $min >>$SCR
			echo mknod $D/$TUB$devno c $fsmaj $min >> $SCR
		}
		echo "echo t$min$GETTYLINE $TTY$devno >> $NINITTAB" >> $SCRTMP
	}
} < $P

echo mv $INITTAB $OINITTAB >> $SCRTMP || exit 1
echo mv $NINITTAB $INITTAB >> $SCRTMP
cat $SCRTMP >> $SCR
rm $SCRTMP
exit 0