#!/bin/bash
#
# /etc/rc.d/init.d/usb - Red Hat SysV-style initscript to load and remove the
#                        appropriate modules for the USB bus and USB devices.
#
# Written by Alex Stewart as part of the Sony Z505 fixup kit.
#
# chkconfig: 2345 04 96
# description: The Universal Serial Bus (USB) provides plug-and-play access \
#              to a wide variety of hardware peripherals.  This script \
#              manages the necessary drivers to use USB devices under Linux.

# (the following settings should really be in an /etc/sysconfig/usb file (or
#  even managed by a more sophisticated load-on-demand facility), but I wanted
#  to keep things simple for people adding this to an existing system, and
#  currently load-on-demand doesn't work quite right for things like mousedev)

# The driver required for the USB host bus:
usb_controller="usb-uhci"

# Drivers required for USB peripherals.  Add additional device drivers here,
# separated by spaces:
# (these defaults should support almost all floppy/zip/etc drives, USB mice,
#  and USB keyboards)
usb_drivers="usb-storage hid mousedev keybdev"

# source function library
. /etc/rc.d/init.d/functions

# This function returns a list of all usb modules currently listed, in the
# order in which their dependencies require they be removed.
loaded_usb_modules() {
  modules=""
  test_modules="usbcore input"
  while [ -n "$test_modules" ]; do
    next_pass=""
    for module in $test_modules; do
      line=`lsmod | grep "^$module "`
      if [ -n "$line" ]; then
        modules="$modules $module"
        if echo $line | fgrep -q "["; then
          next_pass="$next_pass `echo $line | sed -e 's/.*\[\(.*\)\].*/\1/'`"
        fi
      fi
    done
    test_modules="$next_pass"
  done
  output=""
  for module in $modules; do
    output=" $module `echo \"$output\" | sed -e \"s/ $module / /g\"`"
  done
  echo $output
}

blanking="                \b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"

RETVAL=0
case "$1" in
  start)
        for m in $usb_controller $usb_drivers; do
	  echo -en "\rStarting USB services: $m $blanking"
          modprobe $m || RETVAL=$?
        done
	echo -en "\rStarting USB services: $blanking"
	touch /var/lock/subsys/usb
        [ $RETVAL -eq 0 ] && success || failure
	echo
	;;
  stop)
        for m in `loaded_usb_modules`; do
	  echo -en "\rShutting down USB services: $m $blanking"
          rmmod $m || RETVAL=$?
        done
	echo -en "\rShutting down USB services: $blanking"
        [ $RETVAL -eq 0 ] && success || failure
	echo
	[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/gpm
	;;
  restart|reload)
	$0 stop
	$0 start
	RETVAL=$?
	;;
  status)
        modules=`loaded_usb_modules`
        if [ -n "$modules" ]; then
          echo "The following USB modules are loaded:"
          for m in $modules; do
            echo "  $m"
          done
          RETVAL=0
        else
          echo "No USB modules are currently loaded."
          RETVAL=1
        fi
	;;
  *)
	echo "Usage: usb {start|stop|status|restart|reload}"
	exit 1
esac

exit $RETVAL