You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.7 KiB
43 lines
1.7 KiB
commit 0961f7e1e300ef633b0c1ad95d0999fb5c169f4e |
|
Author: Jeff Layton <jlayton@poochiereds.net> |
|
Date: Wed Jul 23 14:21:05 2014 -0400 |
|
|
|
fcntl-linux.h: add new definitions and manual updates for open file description locks |
|
|
|
Open file description locks have been merged into the Linux kernel for |
|
v3.15. Add the appropriate command-value definitions and an update to |
|
the manual that describes their usage. |
|
|
|
Note by DJ: the implementation doesn't work correctly for 32-bit file |
|
offsets. Upstream changed the ABI to compensate but RHEL can't, so we |
|
enable these only for when file offsets are 64 bits. |
|
|
|
diff -rup a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h |
|
--- a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h 2018-04-13 18:38:24.000000000 -0400 |
|
+++ b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h 2018-04-13 20:05:21.743234360 -0400 |
|
@@ -117,6 +117,25 @@ |
|
# define F_SETLKW64 14 /* Set record locking info (blocking). */ |
|
#endif |
|
|
|
+#ifdef __USE_FILE_OFFSET64 |
|
+/* open file description locks. |
|
+ |
|
+ Usually record 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 process-associated record |
|
+ locks, but are "owned" by the opened file description, not the process. |
|
+ This means that they are inherited across fork or clone with CLONE_FILES |
|
+ like BSD (flock) locks, and they are only released automatically when the |
|
+ last reference to the the file description against which they were acquired |
|
+ is put. */ |
|
+#ifdef __USE_GNU |
|
+# define F_OFD_GETLK 36 |
|
+# define F_OFD_SETLK 37 |
|
+# define F_OFD_SETLKW 38 |
|
+#endif |
|
+#endif |
|
+ |
|
#ifdef __USE_LARGEFILE64 |
|
# define O_LARGEFILE __O_LARGEFILE |
|
#endif
|
|
|