package/mstpd: fix mstpd bridge-stp use of pidof

Through mstpd version 0.1.0, the bridge-stp script uses the '-c'
option to the pidof command. Busybox does not support this option, so
mstpd does not work.

This has been fixed in the main development branch of mstpd, but it is
unclear when the next release will be. In the meantime, apply the fix
here so that mstpd will be useable until the next version release.

Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/mstpd/0001-bridge-stp.in-support-different-versions-of-pidof-13.patch

@@ -0,0 +1,48 @@
+From 181c453fc1a00573e19f14960dcc54ad84beea7c Mon Sep 17 00:00:00 2001
+From: colin-foster-in-advantage <colin.foster@in-advantage.com>
+Date: Tue, 12 Jul 2022 23:01:09 -0700
+Subject: [PATCH] bridge-stp.in: support different versions of pidof (#137)
+
+* bridge-stp.in: support different versions of pidof
+
+Busybox uses a version of pdiof that doesn't support the -c option. As
+such, this renders mstpd non-functional on any Busybox system.
+
+Just use the standard form of pidof to detect any running instances of mstpd.
+
+Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
+---
+ bridge-stp.in | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/bridge-stp.in b/bridge-stp.in
+index 47cbe79..3807873 100755
+--- a/bridge-stp.in
++++ b/bridge-stp.in
+@@ -139,7 +139,7 @@ case "$action" in
+         fi
+ 
+         # Start mstpd if necessary.
+-        if ! pidof -c -s mstpd >/dev/null; then
++        if ! pidof -s mstpd >/dev/null; then
+             if [ "$MANAGE_MSTPD" != 'y' ]; then
+                 errmsg 'mstpd is not running'
+                 exit 3
+@@ -212,12 +212,12 @@ case "$action" in
+         done
+ 
+         # Kill mstpd, since no bridges are currently using it.
+-        kill $(pidof -c mstpd)
++        kill $(pidof mstpd)
+         ;;
+     restart|restart_config)
+         if [ "$action" = 'restart' ]; then
+             # Kill mstpd.
+-            pids="$(pidof -c mstpd)" ; Err=$?
++            pids="$(pidof mstpd)" ; Err=$?
+             if [ $Err -eq 0 ]; then
+                 echo 'Stopping mstpd ...'
+                 kill $pids
+-- 
+2.25.1
+