Personal Computer World 2009 February/PCWFEB09.iso/Software/Linux/Kubuntu 8.10/kubuntu-8.10-desktop-i386.iso/casper/filesystem.squashfs/etc/wpa_supplicant/ifupdown.sh

Linux/UNIX/POSIX Shell Script | 2008-09-03 | 5KB | 173 lines

#!/bin/sh

#####################################################################
## Purpose
# This file is executed by ifupdown in pre-up, post-up, pre-down and
# post-down phases of network interface configuration. It allows
# ifup(8), and ifdown(8) to manage wpa_supplicant(8) and wpa_cli(8)
# processes running in daemon mode.
#
# /etc/wpa_supplicant/functions.sh is sourced by this file.
#
# This file is provided by the wpasupplicant package.

#####################################################################
# Copyright (C) 2006 - 2008 Debian/Ubuntu wpasupplicant Maintainers
# <[e-mail]>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# On Debian GNU/Linux systems, the text of the GPL license can be
# found in /usr/share/common-licenses/GPL.

if [ -n "$IF_WPA_MAINT_DEBUG" ]; then
    set -x
fi

# quit if we're called for the loopback
if [ "$IFACE" = lo ]; then
    exit 0
fi

# allow wpa_supplicant interface to be specified via wpa-iface
# useful for starting wpa_supplicant on one interface of a bridge
if [ -n "$IF_WPA_IFACE" ]; then
    WPA_IFACE="$IF_WPA_IFACE"
else
    WPA_IFACE="$IFACE"
fi

# source functions
if [ -f /etc/wpa_supplicant/functions.sh ]; then
    . /etc/wpa_supplicant/functions.sh
else
    exit 0
fi

# quit if executables are not installed
if [ ! -x "$WPA_SUP_BIN" ] || [ ! -x "$WPA_CLI_BIN" ]; then
    exit 0
fi

do_start () {
    if test_wpa_cli; then
        # if wpa_action is active for this IFACE, do nothing
        ifupdown_locked && exit 0

        # if the administrator is calling ifup, say something useful
        if [ "$PHASE" = "pre-up" ]; then
            wpa_msg stderr "wpa_action is managing ifup/ifdown state of $WPA_IFACE"
            wpa_msg stderr "execute \`ifdown --force $WPA_IFACE' to stop wpa_action"
        fi
        exit 1
    elif ! set | grep -q "^IF_WPA"; then
        # no wpa- option defined for IFACE, do nothing
        exit 0
    fi

    # ensure stale ifupdown_lock marker is purged
    ifupdown_unlock

    # preliminary sanity checks for roaming daemon
    if [ -n "$IF_WPA_ROAM" ]; then
        if [ "$METHOD" != "manual" ]; then
            wpa_msg stderr "wpa-roam can only be used with the \"manual\" inet METHOD"
            exit 1
        fi
        if [ -n "$IF_WPA_MAPPING_SCRIPT" ]; then
            if ! type "$IF_WPA_MAPPING_SCRIPT" >/dev/null; then
                wpa_msg stderr "wpa-mapping-script \"$IF_WPA_MAPPING_SCRIPT\" is not valid"
                exit 1
            fi
        fi
        if [ -n "$IF_WPA_MAPPING_SCRIPT_PRIORITY" ] && [ -z "$IF_WPA_MAPPING_SCRIPT" ]; then
            wpa_msg stderr "\"wpa-mapping-script-priority 1\" is invalid without a wpa-mapping-script"
            exit 1
        fi
        IF_WPA_CONF="$IF_WPA_ROAM"
        WPA_ACTION_SCRIPT="/sbin/wpa_action"
    fi

    # master function; determines if ifupdown.sh should do something or not
    if [ -n "$IF_WPA_CONF" ] && [ "$IF_WPA_CONF" != "managed" ]; then
        if [ ! -s "$IF_WPA_CONF" ]; then
            wpa_msg stderr "cannot read contents of $IF_WPA_CONF"
            exit 1
        fi
        WPA_SUP_CONF_CTRL_DIR=$(sed -n -e 's/[[:space:]]*#.*//g' -e 's/[[:space:]]\+.*$//g' \
            -e 's/^ctrl_interface=\(DIR=\)\?\(.*\)/\2/p' "$IF_WPA_CONF")
        if [ -n "$WPA_SUP_CONF_CTRL_DIR" ]; then
            WPA_CTRL_DIR="$WPA_SUP_CONF_CTRL_DIR"
            WPA_SUP_CONF="-c $IF_WPA_CONF"
        else
            # specify the default ctrl_interface since none was defined in
            # the given IF_WPA_CONF
            WPA_SUP_CONF="-c $IF_WPA_CONF -C $WPA_CTRL_DIR"
        fi
    else
        # specify the default ctrl_interface
        WPA_SUP_CONF="-C $WPA_CTRL_DIR"
    fi
}

do_stop () {
    if test_wpa_cli; then
        # if wpa_action is active for this IFACE and calling ifdown,
        # do nothing
        ifupdown_locked && exit 0
    elif test_wpa_supplicant; then
        # wpa_supplicant process exists for this IFACE, but wpa_cli
        # process does not. Allow stop mode to kill this process.
        :
    else
        exit 0
    fi
}

case "$MODE" in
    start)
        do_start
        case "$PHASE" in
            pre-up)
                kill_wpa_supplicant
                init_wpa_supplicant    || exit 1
                conf_wpa_supplicant     || { kill_wpa_supplicant; exit 1; }
                ;;
            post-up)
                init_wpa_cli         || { kill_wpa_supplicant; exit 1; }
                ;;
        esac
        ;;

    stop)
        do_stop
        case "$PHASE" in
            pre-down)
                kill_wpa_cli
                ;;
            post-down)
                kill_wpa_supplicant
                ;;
            *)
                wpa_msg stderr "unknown phase: \"$PHASE\""
                exit 1
                ;;
        esac
        ;;

    *)
        wpa_msg stderr "unknown mode: \"$MODE\""
        exit 1
        ;;
esac

exit 0