Chip 2007 January, February, March & April/Chip-Cover-CD-2007-02.iso/Pakiet bezpieczenstwa/mini Pentoo LiveCD 2006.1/mpentoo-2006.1.iso/livecd.squashfs/etc/hotplug/hotplug.functions

Text File | 2006-05-01 | 5KB | 195 lines

#
# Setup and BASH utility functions for use in hotplug agents
#
# Most essential parameters are passed from the kernel using
# environment variables.  For more information, see the docs
# on-line at http://linux-hotplug.sourceforge.net or the
# sources for each hotplug-aware kernel subsystem.
#
# $Id: hotplug.functions,v 1.27 2004/09/20 23:12:07 kroah Exp $
#
#

# DEBUG=yes; export DEBUG
PATH=/bin:/sbin:/usr/sbin:/usr/bin

KERNEL=`uname -r`
MODULE_DIR=/lib/modules/$KERNEL

HOTPLUG_DIR=/etc/hotplug

if [ -f /etc/sysconfig/hotplug ]; then
    . /etc/sysconfig/hotplug
fi

if [ -x /usr/bin/logger ]; then
    LOGGER=/usr/bin/logger
elif [ -x /bin/logger ]; then
    LOGGER=/bin/logger
else
    unset LOGGER
fi
#
# for diagnostics
#
if [ -t 1 -o -z "$LOGGER" ]; then
    mesg () {
    echo "$@"
    }
else
    mesg () {
    $LOGGER -t $(basename $0)"[$$]" "$@"
    }
fi

debug_mesg () {
    test "$DEBUG" = "" -o "$DEBUG" = no && return
    mesg "$@"
}


#
# Not "modprobe --autoclean" ... one driver module can handle many
# devices.  Unloading should be done when no devices are present.
# Autocleaning happens if none of the devices are open, once any of
# them gets opened; wrong timing.
#
MODPROBE="/sbin/modprobe -s -q"
#MODPROBE="/sbin/modprobe -vs"


####################################################################
#
# usage: load_driver type filename description
#
# modprobes driver module(s) if appropriate, and optionally
# invokes a driver-specific setup script (or user-mode driver).
#
# the "modules.*map" format file is guaranteed to exist
#
load_drivers ()
{
    local LOADED TYPE FILENAME DESCRIPTION LISTER
    DRIVERS=""

    # make this routine more readable
    TYPE=$1
    FILENAME=$2
    DESCRIPTION=$3

    # should we use usbmodules, pcimodules?  not on 2.5+, because sysfs
    # ought to expose the data we need to find all candidate drivers.
    # (on 2.5.48 it does for usb; but maybe not yet for pci.)
    case "$KERNEL" in
    2.2*|2.3*|2.4*)    LISTER=`which ${TYPE}modules` ;;
    *)            LISTER="" ;;
    esac

    if [ "$LISTER" != "" ]; then
    # lister programs MIGHT be preferable to parsing from shell scripts:
    # - usbmodules used for (a) multi-interface devices, (b) coldplug
    # - pcimodules used only for coldplug
    case $TYPE in
    usb)
        # "usbutils-0.8" (or later) is needed in $PATH
        # only works if we have usbfs
        # ... reads more descriptors than are passed in env
        # ... doesn't handle comment syntax either
        if [ "$DEVICE" = "" -o ! -f "$DEVICE" ]; then
        LISTER=
        else
        DRIVERS=`$LISTER --mapfile $FILENAME --device $DEVICE`
        fi ;;

    pci)
        debug_mesg "pcimodules is scanning more than $PCI_SLOT ..."
        DRIVERS=`$LISTER`
        ;;
    esac
    fi

    # try parsing by shell scripts if no luck yet
    if [ "$DRIVERS" = "" ]; then
    ${TYPE}_map_modules < $FILENAME
    fi

    # FIXME remove dups and blacklisted modules from $DRIVERS here

    if [ "$DRIVERS" = "" ]; then
    return
    fi

    # Note that DRIVERS aren't all going to be modules.
    # For USB, some user-mode drivers or setup scripts may be listed.
    debug_mesg Setup $DRIVERS for $DESCRIPTION

    # either kernel or user mode drivers may need to be set up
    for MODULE in $DRIVERS
    do
    # maybe driver modules need loading
        LOADED=false
    if ! lsmod | grep -q "^$(echo $MODULE|sed -e 's/-/_/g') " > /dev/null 2>&1; then
        if grep -q "^$(echo $MODULE|sed -e 's/[-_]/[-_]/g')\$" $HOTPLUG_DIR/blacklist \
                $HOTPLUG_DIR/blacklist.d/* \
            >/dev/null 2>&1; then
        debug_mesg "... blacklisted module:  $MODULE"
        continue
        fi

        # statically linked modules aren't shown by 'lsmod',
        # and user mode drivers will ONLY have a setup script;
        # it's not an error if a module doesn't exist or won't load.
        if $MODPROBE -n $MODULE >/dev/null 2>&1 &&
            ! $MODPROBE $MODULE >/dev/null 2>&1 ; then
        mesg "... can't load module $MODULE"
        else
        # /etc/modules.conf may have set non-default module
        # parameters ... handle per-device parameters in apps
        # (ioctls etc) not in setup scripts or modules.conf
        LOADED=true
        fi
    else
        # This module is already loaded
        LOADED=true
    fi

    # always run setup scripts after any matching kernel code has had
    # a chance to do its thing, no matter whether it was dynamically
    # or statically linked, or if there is only a user mode driver.
    # the script might re-enumerate usb devices after firmware download,
    # giving kernel code another chance.
    if [ -x $HOTPLUG_DIR/$TYPE/$MODULE ]; then
        debug_mesg Module setup $MODULE for $DESCRIPTION
        $HOTPLUG_DIR/$TYPE/$MODULE
        LOADED=true
    fi

    if [ "$LOADED" = "false" ]; then
        mesg "missing kernel or user mode driver $MODULE "
    fi
    if echo "$MODULE" | grep -q "usb-storage" > /dev/null 2>&1 ; then
        [ -x /usr/sbin/updfstab ] &&  /usr/sbin/updfstab
    fi
    done
}

####################################################################
#
# usage: log_to_stdout filename
#
# writes a copy of the current hotplug event to stdout.
# add buffering, to avoid interleaving reports!
#
log_to_stdout ()
{
    if [ -x /bin/date ]; then
    echo "HOTPLUG_TIME='$(/bin/date)'"
    fi

    env | egrep -v '^PATH=|^PWD=|^_=|^OLDPWD=|^SHLVL=|^HOME='
    echo ''
    # empty line terminates events
}

# vim:syntax=sh