From 66ab73d01f264bd8d3043809d47ab071ad3670a0 Mon Sep 17 00:00:00 2001
From: Jo-Philipp Wich <jow@openwrt.org>
Date: Wed, 5 May 2010 23:24:11 +0000
Subject: [PATCH] base-files, ppp: remove protocol specific cleanup code from
 /sbin/ifdown and move it to protocol stop callbacks

SVN-Revision: 21383
---
 .../base-files/files/lib/network/config.sh    | 27 +++++++++++++++----
 package/base-files/files/sbin/ifdown          | 22 ---------------
 package/ppp/files/ppp.sh                      |  7 ++++-
 3 files changed, 28 insertions(+), 28 deletions(-)

diff --git a/package/base-files/files/lib/network/config.sh b/package/base-files/files/lib/network/config.sh
index e64198b7f6..80547b76d5 100755
--- a/package/base-files/files/lib/network/config.sh
+++ b/package/base-files/files/lib/network/config.sh
@@ -264,7 +264,6 @@ setup_interface() {
 	}
 	set_interface_ifname "$config" "$iface_main"
 
-	pidfile="/var/run/$iface_main.pid"
 	[ -n "$proto" ] || config_get proto "$config" proto
 	case "$proto" in
 		static)
@@ -272,11 +271,14 @@ setup_interface() {
 			setup_interface_static "$iface_main" "$config"
 		;;
 		dhcp)
+			local lockfile="/var/lock/dhcp-$iface_main"
+			lock "$lockfile"
+
 			# prevent udhcpc from starting more than once
-			lock "/var/lock/dhcp-$iface_main"
+			local pidfile="/var/run/dhcp-${iface_main}.pid"
 			local pid="$(cat "$pidfile" 2>/dev/null)"
-			if [ -d "/proc/$pid" ] && grep udhcpc "/proc/${pid}/cmdline" >/dev/null 2>/dev/null; then
-				lock -u "/var/lock/dhcp-$iface_main"
+			if [ -d "/proc/$pid" ] && grep -qs udhcpc "/proc/${pid}/cmdline"; then
+				lock -u "$lockfile"
 			else
 				local ipaddr netmask hostname proto1 clientid
 				config_get ipaddr "$config" ipaddr
@@ -292,7 +294,7 @@ setup_interface() {
 				local dhcpopts
 				[ ."$proto1" != ."$proto" ] && dhcpopts="-n -q"
 				$DEBUG eval udhcpc -t 0 -i "$iface_main" ${ipaddr:+-r $ipaddr} ${hostname:+-H $hostname} ${clientid:+-c $clientid} -b -p "$pidfile" ${dhcpopts:- -O rootpath -R &}
-				lock -u "/var/lock/dhcp-$iface_main"
+				lock -u "$lockfile"
 			fi
 		;;
 		none)
@@ -329,6 +331,21 @@ setup_interface() {
 
 stop_interface_dhcp() {
 	local config="$1"
+
+	local iface
+	config_get iface "$config" iface
+
+	local lock="/var/lock/dhcp-${iface}"
+	[ -f "$lock" ] && lock -u "$lock"
+
+	local pidfile="/var/run/dhcp-${iface}.pid"
+	local pid="$(cat "$pidfile" 2>/dev/null)"
+	[ -d "/proc/$pid" ] && {
+		grep -qs udhcpc "/proc/$pid/cmdline" && kill -TERM $pid && \
+			while grep -qs udhcpc "/proc/$pid/cmdline"; do sleep 1; done
+		rm -f "$pidfile"
+	}
+
 	uci -P /var/state revert "network.$config"
 }
 
diff --git a/package/base-files/files/sbin/ifdown b/package/base-files/files/sbin/ifdown
index 8de414d8b6..7c6a5b7061 100755
--- a/package/base-files/files/sbin/ifdown
+++ b/package/base-files/files/sbin/ifdown
@@ -29,28 +29,6 @@ config_get iface "$cfg" device
 # call interface stop handler
 ( type "stop_interface_$proto" ) >/dev/null 2>/dev/null && eval "stop_interface_$proto '$cfg'"
 
-# 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 "$cfg" ifname
-pids="$(head -n1 -q /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" device
 
diff --git a/package/ppp/files/ppp.sh b/package/ppp/files/ppp.sh
index bc18d1ec9a..b3c9e53655 100644
--- a/package/ppp/files/ppp.sh
+++ b/package/ppp/files/ppp.sh
@@ -10,8 +10,13 @@ stop_interface_ppp() {
 	local link="${proto:-ppp}-$ifname"
 	[ -f "/var/run/ppp-${link}.pid" ] && {
 		local pid="$(head -n1 /var/run/ppp-${link}.pid 2>/dev/null)"
-		grep -qs pppd "/proc/$pid/cmdline" && kill -TERM $pid
+		grep -qs pppd "/proc/$pid/cmdline" && kill -TERM $pid && \
+			while grep -qs pppd "/proc/$pid/cmdline"; do sleep 1; done
+		rm -f "/var/run/ppp-${link}.pid"
 	}
+
+	local lock="/var/lock/ppp-$link"
+	[ -f "$lock" ] && lock -u "$lock"
 }
 
 start_pppd() {