pci.rc

这是关于usb等方面的热拔插源代码

#!/bin/sh
# vim: syntax=sh
#
# pci.rc	mostly to recover lost boot-time pci hotplug events
#
# $Id: pci.rc,v 1.11 2004/04/01 07:24:31 kroah Exp $
#

PATH=/sbin:/bin:/usr/sbin:/usr/bin

cd /etc/hotplug
. ./hotplug.functions

pci_boot_events ()
{
    # make sure the pci agent will run
    ACTION=add
    PCI_CLASS=0
    PCI_ID=0:0
    PCI_SLOT=0:0.0
    PCI_SLOT_NAME=0:0.0
    PCI_SUBSYS_ID=0:0
    export ACTION PCI_CLASS PCI_ID PCI_SLOT PCI_SLOT_NAME PCI_SUBSYS_ID

    if [ -d /sys/bus ]; then
	# 2.6 kernels
	if [ -d /sys/bus/pci/devices/ ]; then
	    cd /sys/bus/pci/devices/
	    for PCI_DEVICE in *; do
		set `echo $PCI_DEVICE \
		    | sed -e 's/\([^:]*\):\(.*\):\(.*\)\.\(.*\)/\1 \2 \3 \4/'`
		PCI_SLOT_NAME=$2:$3.$4
		PCI_CLASS="`cat $PCI_DEVICE/class`"
		PCI_CLASS=${PCI_CLASS#0x}
		vendor_id=`cat $PCI_DEVICE/vendor`
		device_id=`cat $PCI_DEVICE/device`
		PCI_ID="${vendor_id#0x}:${device_id#0x}"
		sub_vendor_id=`cat $PCI_DEVICE/subsystem_vendor`
		sub_device_id=`cat $PCI_DEVICE/subsystem_device`
		PCI_SUBSYS_ID="${sub_vendor_id#0x}:${sub_device_id#0x}"
		/sbin/hotplug pci
	    done
	fi
    else
	# 2.4 kernels
	LISTER=`which pcimodules`
	if [ "$LISTER" = "" -o ! -f /proc/bus/pci/devices -o ! -x pci.agent ]; then
	    echo $"** can't synthesize pci hotplug events"
	    return 1
	fi

	# these notifications will be handled by pcimodules
	for BUS in `cd /proc/bus/pci;find * -type d -print`; do
	    for SLOT_FUNC in `cd /proc/bus/pci/$BUS; echo *`; do
		PCI_SLOT=$BUS:$SLOT_FUNC
		/sbin/hotplug pci
	    done
	done
    fi

    return 0
}

# See how we were called.
case "$1" in
  start)
	pci_boot_events
        ;;
  stop)
	# echo $"pci stop -- ignored"
        ;;
  status)
	echo $"PCI Status for kernel: "  `uname -srm`
	echo ''

	if [ -f /proc/bus/pci/devices ]; then
	    COUNT=`ls /proc/bus/pci | wc -l`
	    if [ $COUNT -gt 1 ]; then
		COUNT=`expr $COUNT - 1`
		echo $"PCI up; bus count is $COUNT"
		if [ -x /sbin/lspci ]; then
		    /sbin/lspci
		fi
	    else
		echo $"no PCI busses?"
	    fi
	    echo ''
	else
	    echo $"no PCI /proc support?"
	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