man: document that udev_device_new_* functions set errno on error

2016-02-03 12:14:32 +01:00
parent c5c41f1e57
commit f471010353
1 changed files with 2 additions and 1 deletions
@@ -189,7 +189,8 @@
    <function>udev_device_new_from_device_id()</function> and
    <function>udev_device_new_from_environment()</function> return a
    pointer to the allocated udev device. On failure,
-    <constant>NULL</constant> is returned.
+    <constant>NULL</constant> is returned,
+    and <varname>errno</varname> is set appropriately.
    <function>udev_device_ref()</function> returns the argument
    that it was passed, unmodified.
    <function>udev_device_unref()</function> always returns