From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 7 Sep 2005 16:54:13 +0000 (+0000)
Subject: make sure only one dhcp client is active for one interface
X-Git-Tag: whiterussian_rc4~197
X-Git-Url: http://git.openwrt.org/?a=commitdiff_plain;h=60a630f5a53f35b2d33f3bb34b1228e32a02a8ab;p=openwrt%2Fsvn-archive%2Fopenwrt.git

make sure only one dhcp client is active for one interface

SVN-Revision: 1872
---

diff --git a/openwrt/package/base-files/default/etc/functions.sh b/openwrt/package/base-files/default/etc/functions.sh
index dfbdb873f7..2bf4a8d998 100755
--- a/openwrt/package/base-files/default/etc/functions.sh
+++ b/openwrt/package/base-files/default/etc/functions.sh
@@ -66,7 +66,12 @@ do_ifup() {
 		DHCP_HOSTNAME=${DHCP_HOSTNAME%%.*}
 		[ -z $DHCP_HOSTNAME ] || DHCP_ARGS="$DHCP_ARGS -H $DHCP_HOSTNAME"
 		[ "$if_proto" = "pptp" ] && DHCP_ARGS="$DHCP_ARGS -n -q" || DHCP_ARGS="$DHCP_ARGS -R &"
+		oldpid=$(cat $pidfile)
 		${DEBUG:-eval} "udhcpc $DHCP_ARGS"
+		pidof udhcpc | grep "$oldpid" >&- 2>&- && {
+			sleep 1
+			kill -9 $oldpid
+		}
 	;;
 	none|"")
 	;;