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openwrt-xburst/package/base-files/default/sbin/ifdown
nbd 0d67238dc6 use lock to remove race conditions in bringing up ppp and dhcp that would lead to multiple active processes
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@5298 3c298f89-4303-0410-b956-a3cf2f4a3e73
2006-10-26 01:33:36 +00:00

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#!/bin/sh
# Copyright (C) 2006 OpenWrt.org
[ $# = 0 ] && { echo " $0 <group>"; exit; }
. /etc/functions.sh
include /lib/network
scan_interfaces
cfg=$1
debug "### ifdown $cfg ###"
config_get proto "$cfg" proto
[ -z "$proto" ] && { echo "interface not found."; exit; }
# make sure all locks are removed
for lock in "/var/lock/dhcp-$iface" "/var/lock/ppp-$iface"; do
[ -f "$lock" ] && {
lock -u "$lock"
sleep 1
}
done
# kill active ppp daemon and other processes
config_get ifname "$cfg" ifname
pids="$(cat /var/run/${ifname}.pid /var/run/ppp-${cfg}.pid 2>/dev/null)"
for pid in $pids; do
[ -d "/proc/$pid" ] && {
kill $pid
[ -d "/proc/$pid" ] && {
sleep 1
kill -9 $pid 2>/dev/null >/dev/null
}
}
done
rm -f /var/run/${ifname}.pid /var/run/ppp-${cfg}.pid
config_get ifname "$cfg" ifname
config_get device "$cfg" ifname
[ ."$device" != ."$ifname" ] || device=
for dev in $ifname $device; do
ifconfig "$ifname" 0.0.0.0 down >/dev/null 2>/dev/null
done
config_get iftype "$cfg" type
[ "$iftype" = "bridge" ] && brctl delbr "$ifname" >/dev/null 2>/dev/null