serial

pcmcia source code

#!/bin/sh
#
# serial 1.42 2002/06/25 06:15:10 (David Hinds)
#
# Initialize or shutdown a PCMCIA serial device
#
# The first argument should be either 'start' or 'stop'.  The second
# argument is the base name for the device.
#
# The script passes an extended device address to 'serial.opts' in the 
# ADDRESS variable, to retrieve device-specific configuration options.
# The address format is "scheme,socket,instance" where "scheme" is the
# PCMCIA configuration scheme, "socket" is the socket number, and
# "instance" is used to number multiple ports on a single card.  
#

if [ -r ./shared ] ; then . ./shared ; else . /etc/pcmcia/shared ; fi

# Get device attributes
get_info $DEVICE

# Load site-specific settings
ADDRESS="$SCHEME,$SOCKET,$INSTANCE"
start_fn () { return; }
stop_fn () { return; }
. $0.opts

# Newer kernels deprecate use of "cua" devices, but we need to
# keep track of them anyway, if the device files are present
NR=`expr $MINOR - 64`
if [ -c /dev/cua1 ] ; then
    CALLOUT=cua$NR
else
    CALLOUT=$DEVICE
fi

case "$ACTION" in

'start')
    [ -n "$VERBOSE" -a -n "$INFO" ] && echo "$INFO"
    if [ ! -c /dev/$DEVICE ] ; then
	cd /dev ; log ./MAKEDEV $DEVICE
    fi
    if [ -n "$LINK" ] ; then
	if [ -L $LINK ] ; then rm $LINK ; fi
	if match `uname -r` "2.[2345].*" ; then
	    ln -s /dev/$DEVICE $LINK
	else
	    ln -s /dev/$CALLOUT $LINK
	fi
    fi
    if [ -x /bin/setserial ] ; then
	# Workaround for serial driver bug
	IRQ=`setserial /dev/$DEVICE | sed -e 's/.*IRQ: //'`
	setserial /dev/$DEVICE irq 0 ; setserial /dev/$DEVICE irq $IRQ
	if [ -n "$SERIAL_OPTS" ] ; then
	    log setserial /dev/$DEVICE $SERIAL_OPTS
	fi
    fi
    if [ -n "$INITTAB" ] ; then
	echo "S$NR:12345:respawn:$INITTAB $DEVICE" >> /etc/inittab
	telinit q
    fi
    start_fn $DEVICE
    ;;

'check')
    is_true $NO_CHECK && exit 0
    if [ -n "$INITTAB" ] ; then
	do_fuser -v /dev/$DEVICE /dev/$CALLOUT $LINK | grep -v getty \
	    | grep -q /dev/$DEVICE && exit 1
    else
	do_fuser -s /dev/$DEVICE /dev/$CALLOUT $LINK && exit 1
    fi
    ;;

'cksum')
    chk_simple "$NEW_SCHEME,$SOCKET,$INSTANCE" || exit 1
    ;;
    
'stop')
    if [ -n "$INITTAB" ] ; then
	grep -v $DEVICE /etc/inittab > /etc/inittab.new
	mv /etc/inittab.new /etc/inittab
	telinit q
    fi
    do_fuser -k /dev/$DEVICE /dev/$CALLOUT $LINK > /dev/null
    if [ -L "$LINK" ] ; then rm $LINK ; fi
    stop_fn $DEVICE
    ;;

'suspend')
    do_fuser -k -STOP /dev/$DEVICE /dev/$CALLOUT > /dev/null
    ;;

'resume')
    if [ -n "$SERIAL_OPTS" ] ; then
	setserial /dev/$DEVICE $SERIAL_OPTS
    fi
    do_fuser -k -CONT /dev/$DEVICE /dev/$CALLOUT $LINK > /dev/null
    ;;

*)
    usage
    ;;

esac

exit 0