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[PATCH v2 1/2] fcntl-linux.h: add new definitions for file-private lock cmd values


Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
 ChangeLog                                  |  5 +++++
 sysdeps/unix/sysv/linux/bits/fcntl-linux.h | 19 +++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 5708d4eb64c2..55a84e598e46 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2014-04-11  Jeff Layton  <jlayton@redhat.com>
+
+	* sysdeps/unix/sysv/linux/bits/fcntl-linux.h:
+	  (F_GETLKP, F_SETLKP, F_SETLKPW): New macros.
+
 2014-04-11  Stefan Liebler  <stli@linux.vnet.ibm.com>
 
 	* sysdeps/s390/s390-32/configure.ac: Unify file with ...
diff --git a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
index 915eb3ede560..ae8ec1598a15 100644
--- a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
+++ b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
@@ -117,6 +117,25 @@
 # define F_SETLKW64	14	/* Set record locking info (blocking).	*/
 #endif
 
+/* fd "private" POSIX locks.
+
+   Usually POSIX locks held by a process are released on *any* close and are
+   not inherited across a fork.
+
+   These cmd values will set locks that conflict with normal POSIX locks, but
+   are "owned" by the opened file, not the process.  This means that they are
+   inherited across fork like BSD (flock) locks, and they are only released
+   automatically when the last reference to the the open file against which
+   they were acquired is put.
+ */
+#ifdef __USE_GNU
+# ifndef F_GETLKP
+#  define F_GETLKP	36
+#  define F_SETLKP	37
+#  define F_SETLKPW	38
+# endif
+#endif
+
 #ifdef __USE_LARGEFILE64
 # define O_LARGEFILE __O_LARGEFILE
 #endif
-- 
1.9.0


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