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>C.2. hotplug: <TT
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>input.rc</TT
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><TT
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>/etc/hotplug/input.rc</TT
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> #!/bin/bash
#
# input.rc This loads handlers for those input devices
# that have drivers compiled in kernel
# Currently stopping is not supported
#
# Best invoked via /etc/init.d/hotplug or equivalent, with
# writable /tmp, /usr mounted, and syslogging active.
#
PATH=/sbin:/bin:/usr/sbin:/usr/bin
PROCDIR=/proc/bus/input
# source function library
if [ -f /etc/init.d/functions ]; then
. /etc/init.d/functions
elif [ -f /etc/rc.d/init.d/functions ]; then
. /etc/rc.d/init.d/functions
fi
if [ -f /etc/hotplug/hotplug.functions ]; then
. /etc/hotplug/hotplug.functions
fi
input_reset_state () {
PRODUCT=
NAME=
PHYS=
EV=
KEY=
REL=
ABS=
MSC=
LED=
SND=
FF=
}
#
# "COLD PLUG" ... load input handlers for compile-in input drivers loaded
# before the OS could really handle hotplug, perhaps because /sbin or
# $HOTPLUG_DIR wasn't available or /tmp wasn't writable. When/if the
# /sbin/hotplug program is invoked then, hotplug event notifications
# get dropped. To make up for such "cold boot" errors, we synthesize
# all the hotplug events we expect to have seen already. They can be
# out of order, and some might be duplicates.
#
input_boot_events ()
{
if [ ! -r $PROCDIR/devices ]; then
echo $"** can't synthesize input events - $PROCDIR/devices missing"
return
fi
ACTION=add
export ACTION
export PRODUCT NAME PHYS EV KEY REL ABS MSC LED SND FF
input_reset_state
declare line
#
# the following reads from /proc/bus/input/devices. It is inherently
# racy (esp. as this file may be changed by input.agent invocation)
# but so far input devices do not appear in sysfs
#
while read line; do
case "$line" in
I:* ) # product ID
eval "${line#I: }"
PRODUCT=$Bus/$Vendor/$Product/$Version
;;
N:* ) # name
eval "${line#N: }"
NAME="$Name"
;;
P:* ) # Physical
eval "${line#P: }"
PHYS=$Phys
;;
B:* ) # Controls supported
line="${line#B: }"
eval "${line%%=*}=\"${line#*=}\""
;;
"" ) # End of block
debug_mesg "Invoking input.agent"
debug_mesg "PRODUCT=$PRODUCT"
debug_mesg "NAME=$NAME"
debug_mesg "PHYS=$PHYS"
debug_mesg "EV=$EV"
debug_mesg "KEY=$KEY"
debug_mesg "REL=$REL"
debug_mesg "ABS=$ABS"
debug_mesg "MSC=$MSC"
debug_mesg "LED=$LED"
debug_mesg "SND=$SND"
debug_mesg "FF=$FF"
/etc/hotplug/input.agent < /dev/null
input_reset_state
;;
esac
done < $PROCDIR/devices
}
# See how we were called.
case "$1" in
start)
input_boot_events
;;
stop)
: not supported currently
;;
status)
echo $"INPUT status for kernel: " `uname -srm`
echo ''
echo "INPUT devices:"
if [ -r $PROCDIR/devices ]; then
grep "^[INHP]:" $PROCDIR/devices
else
echo "$PROCDIR/devices not available"
fi
echo ''
echo "INPUT handlers:"
if [ -r $PROCDIR/handlers ]; then
cat $PROCDIR/handlers
else
echo "$PROCDIR/handlers not available"
fi
echo ''
;;
restart)
# always invoke by absolute path, else PATH=$PATH:
$0 stop && $0 start
;;
*)
echo $"Usage: $0 {start|stop|status|restart}"
exit 1
esac
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