[patch] patch for wpa_cli.sh

wpa_cli-race-on-connect-disconnect.patch (text/plain), 1.78 KB, created by Justin Bronder (RETIRED) on 2009-08-26 21:08:23 UTC

diff --git a/net-wireless/wpa_supplicant-0.5.7/etc/wpa_supplicant/wpa_cli.sh b/net-wireless/wpa_supplicant-0.5.7/etc/wpa_supplicant/wpa_cli.sh
index d7d340b..9f8879a 100755
--- a/net-wireless/wpa_supplicant-0.5.7/etc/wpa_supplicant/wpa_cli.sh
+++ b/net-wireless/wpa_supplicant-0.5.7/etc/wpa_supplicant/wpa_cli.sh
@@ -5,6 +5,24 @@
 # Alternatively, this file may be distributed under the terms of the BSD License
 # $Header: /var/cvsroot/gentoo-x86/net-wireless/wpa_supplicant/files/wpa_cli.sh,v 1.1 2006/07/11 15:07:16 uberlord Exp $
 
+lockfile='/var/run/wpa_cli.sh-lock'
+get_lock() {
+	while true; do
+		if ( set -o noclobber; echo "$$" > "${lockfile}") 2> /dev/null; then
+			trap 'rm -f "${lockfile}"; exit $?' INT TERM EXIT
+			break
+		else
+			logger -t wpa_cli "$$ Waiting on lock held by $(<${lockfile})"
+		fi
+		/bin/sleep 0.5
+	done
+}
+
+release_lock() {
+	rm -f "${lockfile}"
+	trap - INT TERM EXIT
+}
+
 if [ -z "$1" -o -z "$2" ]; then
 	logger -t wpa_cli "Insufficient parameters"
 	exit 1
@@ -27,9 +45,11 @@ fi
 case ${ACTION} in
 	CONNECTED)
 		EXEC="${EXEC} start"
+		WAIT_FOR_DEPS=true
 		;;
 	DISCONNECTED)
 		EXEC="${EXEC} stop"
+		WAIT_FOR_DEPS=false
 		;;
 	*)
 		logger -t wpa_cli "Unknown action ${ACTION}"
@@ -41,5 +61,13 @@ esac
 # stopping the interface and a background process - like wpa_cli - is.
 export IN_BACKGROUND=true
 
-logger -t wpa_cli "interface ${INTERFACE} ${ACTION}"
-${EXEC} || logger -t wpa_cli "executing '${EXEC}' failed"
+logger -t wpa_cli "$$ interface ${INTERFACE} ${ACTION}"
+get_lock
+${EXEC} || logger -t wpa_cli "$$ executing '${EXEC}' failed"
+if [ ${WAIT_FOR_DEPS} == "true" ]; then
+	while /bin/rc-status --nocolor | grep '\[ starting  \]'>/dev/null; do
+		/bin/sleep 0.5
+	done
+fi
+release_lock
+logger -t wpa_cli "$$ Finished processing ${INTERFACE} ${ACTION}"