+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.
<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>,
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.