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-rw-r--r--src/libudev/libudev-monitor.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/libudev/libudev-monitor.c b/src/libudev/libudev-monitor.c
index 32319aca7b..2ad9e1c3ad 100644
--- a/src/libudev/libudev-monitor.c
+++ b/src/libudev/libudev-monitor.c
@@ -494,6 +494,11 @@ tag:
*
* Only socket connections with uid=0 are accepted.
*
+ * The monitor socket is by default set to NONBLOCK. A variant of poll() on
+ * the file descriptor returned by udev_monitor_get_fd() should to be used to
+ * wake up when new devices arrive, or alternatively the file descriptor
+ * switched into blocking mode.
+ *
* The initial refcount is 1, and needs to be decremented to
* release the resources of the udev device.
*