From 8bfef09df8e1011c6f413822f4455d084b30ba15 Mon Sep 17 00:00:00 2001
From: Tom Gundersen <teg@jklm.no>
Date: Sun, 24 May 2015 15:20:36 +0200
Subject: [PATCH] udevd: event - fix event queue in daemenozied mode
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We would enforce that events could only be added to the queue from the
main process, but that brake in daemonized mode. Relax the restriction
to only allow one process to add events to the queue.

Reported by Mantas Mikulėnas.

(cherry picked from commit 040e689654ef08c63ab93bf0875865398e8d9c91)
---
 src/udev/udevd.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/udev/udevd.c b/src/udev/udevd.c
index afd4640ad1..2a9a429e66 100644
--- a/src/udev/udevd.c
+++ b/src/udev/udevd.c
@@ -564,7 +564,10 @@ static int event_queue_insert(Manager *manager, struct udev_device *dev) {
         assert(manager);
         assert(dev);
 
-        /* only the main process can add events to the queue */
+        /* only one process can add events to the queue */
+        if (manager->pid == 0)
+                manager->pid = getpid();
+
         assert(manager->pid == getpid());
 
         event = new0(struct event, 1);
@@ -1300,8 +1303,6 @@ static int manager_new(Manager **ret) {
         if (!manager)
                 return log_oom();
 
-        manager->pid = getpid();
-
         manager->fd_ep = -1;
         manager->fd_ctrl = -1;
         manager->fd_uevent = -1;