* posix.sgml (std-notes): Change description of flock restrictions.

winsup/cygwin/ChangeLog

@@ -1,3 +1,7 @@
+2012-03-30  Corinna Vinschen  <corinna@vinschen.de>
+
+	* posix.sgml (std-notes): Change description of flock restrictions.
+
 2012-03-30  Corinna Vinschen  <corinna@vinschen.de>
 
 	* devices.h (DEV_TTY_MAJOR): Define, use throughout where appropriate.

winsup/cygwin/posix.sgml

@@ -1457,10 +1457,11 @@ CLOCK_REALTIME and CLOCK_MONOTONIC.  <function>clock_setres</function>,
 <function>clock_settime</function>, and <function>timer_create</function>
 currently support only CLOCK_REALTIME.</para>
 
-<para>BSD file locks created via <function>flock</function> are not
-propagated to the parent process and sibling processes.  The locks are
-only valid in the creating process and subsequently started child processes
-sharing the same file descriptor.</para>
+<para>BSD file locks created via <function>flock</function> are only
+propagated to the direct parent process, not to grand parents or sibling
+processes.  The locks are only valid in the creating process, its parent,
+and subsequently started child processes sharing the same file descriptor.
+</para>
 
 <para><function>fpclassify</function>, <function>isfinite</function>,
 <function>isgreater</function>, <function>isgreaterequal</function>,

winsup/cygwin/release/1.7.12

@@ -5,3 +5,17 @@ What's new:
   existing POSIX devices.
 
 - Add virtual /proc/PID/mountinfo file.
+
+- flock now additionaly supports the following scenario, which requires
+  to propagate locks to the parent process:
+
+    (
+      flock -n 9 || exit 1
+      # ... commands executed under lock ...
+    } 9>/var/lock/mylockfile
+
+  Only propagation to the direct parent process is supported so far,
+  not to grand parents or sibling processes.
+
+- Add a "detect_bloda" setting for the CYGWIN environment variable to help
+  finding potential BLODAs.