#!/bin/sh
# /usr/sbin/dphys-hotplug - call action scripts when hotplug events happen
# author franklin, last modification 2006.05.17
# This script is copyright ETH Zuerich Physics Departement,
#   use under either modified/non-advertising BSD or GPL license

# called directly by the kernel, after setting /proc/sys/kernel/hotplug
#   has as $1 the type of event, such as "usb" or "net"

set -e


# get ready to work
PATH=/sbin:/bin:/usr/sbin:/usr/bin
export PATH

# fix up the defective stdio situation, which crashes some  grep  and  sed
exec < /dev/null > /dev/null 2> /dev/null


# what we are
NAME=dphys-hotplug


# setup a few things
CONF_VERBOSE=yes
if [ -f /${NAME}.debug ] ; then
  DEBUG_LOG=yes
fi


# scripts directory, contains scripts named
#   ${SCRIPTS}/<event-type>.* (such as ${SCRIPTS}/usb.*) (old style names) or
#   ${SCRIPTS}/<event-type>-* (such as ${SCRIPTS}/usb-*) (new style names)
SCRIPTDIR=/etc/${NAME}.d


# tell the world we are doing something
if [ x${DEBUG_LOG} = xyes ] ; then
  /usr/bin/logger -t `/usr/bin/basename $0` -p user.debug \
      DEBUG: $1 ACTION=${ACTION} PRODUCT=${PRODUCT} INTERFACE=${INTERFACE} \
      TYPE=${TYPE} DEVFS=${DEVFS} DEVICE=${DEVICE}
fi


# first call the standard hotplug stuff, so that device gets registered
/sbin/hotplug $@


if [ x${DEVFS} = x ] ; then
  /usr/bin/logger -t `/usr/bin/basename $0` -p user.warning \
      WARNING: no usbdevfs, can not identify device type, aborting ...
  exit 1
fi

if [ x${DEVICE} = x ] ; then
  /usr/bin/logger -t `/usr/bin/basename $0` -p user.error \
      ERROR: usbdevfs faillure, did not identify device type, aborting ...
  exit 1
fi

# then call our own action scripts
if [ -d ${SCRIPTDIR} ] ; then

  # prevent trouble with * expansion when no files, so grep entire dir list
  SCRIPTS=`/bin/ls -1 ${SCRIPTDIR} | /bin/grep "^$1[\.-]" | \
      /usr/bin/wc -l | tr -d ' '`

  if [ x${DEBUG_LOG} = xyes ] ; then
    /usr/bin/logger -t `/usr/bin/basename $0` -p user.debug \
        DEBUG: SCRIPTS=${SCRIPTS}
  fi

  if [ ${SCRIPTS} != 0 ] ; then

    # tell the world we are going to do something
    if [ x${CONF_VERBOSE} = xyes ] ; then
      /usr/bin/logger -t `/usr/bin/basename $0` -p user.info \
          $1 ${ACTION} ${DEVICE}, run "script(s):" \
          `/bin/ls -1 ${SCRIPTDIR} | /bin/grep "^$1[\.-]"`
    fi

    # alphabetic row, so do not depend on other packages, just filter actions
    for SCRIPT in ${SCRIPTDIR}/$1[.-]* ; do
      # no parameters, as $1 has been used for all it can do
      #   is now implied in the choice of script to run
      ${SCRIPT}
    done

  else

    # tell the world we are going to do nothing
    if [ x${CONF_VERBOSE} = xyes ] ; then
      /usr/bin/logger -t `/usr/bin/basename $0` -p user.info \
          $1 ${ACTION} ${DEVICE}, no "script(s)" installed
    fi

  fi

else

  # tell the world we can't do anything
  if [ x${CONF_VERBOSE} = xyes ] ; then
    /usr/bin/logger -t `/usr/bin/basename $0` -p user.info \
        $1 ${ACTION} ${DEVICE}, no script directory ${SCRIPTDIR}
  fi

fi

exit 0