diff options
| -rw-r--r-- | winsup/cygwin/ChangeLog | 4 | ||||
| -rw-r--r-- | winsup/cygwin/posix.sgml | 9 | ||||
| -rw-r--r-- | winsup/cygwin/release/1.7.12 | 14 |
3 files changed, 23 insertions, 4 deletions
diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog index 1c632eb..84110b2 100644 --- a/winsup/cygwin/ChangeLog +++ b/winsup/cygwin/ChangeLog @@ -1,5 +1,9 @@ 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. (DEV_VIRTFS_MAJOR): Ditto. * fhandler_dev.cc (fhandler_dev::readdir): Add comments. Tweak tests diff --git a/winsup/cygwin/posix.sgml b/winsup/cygwin/posix.sgml index 5bb27d7..5e5df46 100644 --- a/winsup/cygwin/posix.sgml +++ b/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>, diff --git a/winsup/cygwin/release/1.7.12 b/winsup/cygwin/release/1.7.12 index f81cbf1..4072ad3 100644 --- a/winsup/cygwin/release/1.7.12 +++ b/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. |