From 85926fd54776578737ae2463b3f64ef733c76dea Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Tue, 24 Oct 2006 23:59:08 +0000
Subject: make network scripts more robust, prevent multiple instances of pppd
 and udhcpc for the same interface

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@5290 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 package/ppp/files/ppp.sh | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'package/ppp/files/ppp.sh')

diff --git a/package/ppp/files/ppp.sh b/package/ppp/files/ppp.sh
index 343223af1b..133400509c 100644
--- a/package/ppp/files/ppp.sh
+++ b/package/ppp/files/ppp.sh
@@ -7,6 +7,11 @@ scan_ppp() {
 
 start_pppd() {
 	local cfg="$1"; shift
+	
+	# make sure only one pppd process is started
+	local pid="$(cat /var/run/ppp-${cfg}.pid 2>/dev/null)"
+	[ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && return 0
+
 	config_get device "$cfg" device
 	config_get unit "$cfg" unit
 	config_get username "$cfg" username
-- 
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