From 3acfabcd1ae55e864601a6ce321bc3830cd57ddd Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Mon, 15 Jan 2018 03:45:27 +0000
Subject:  Don't add the MDEV envvar more than once

---
 src/mdevd/mdevd.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/mdevd/mdevd.c b/src/mdevd/mdevd.c
index 162a6f5..ed83384 100644
--- a/src/mdevd/mdevd.c
+++ b/src/mdevd/mdevd.c
@@ -803,9 +803,12 @@ static inline int run_scriptelem (struct uevent_s *event, scriptelem const *elem
 
   if (action & elem->cmdtype)
   {
-    event->vars[event->varn++] = event->len ;
-    memcpy(event->buf + event->len, "MDEV=", 5) ;
-    event->len += 6 + nodelen ;
+    if (!event_getvar(event, "MDEV"))
+    {
+      event->vars[event->varn++] = event->len ;
+      memcpy(event->buf + event->len, "MDEV=", 5) ;
+      event->len += 6 + nodelen ;
+    }
     if (dryrun)
     {
       strerr_warni2x("dry run: spawn ", storage + elem->command) ;
-- 
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