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| author | Jeff Layton <jlayton@poochiereds.net> | 2014-07-23 14:21:05 -0400 |
|---|---|---|
| committer | Carlos O'Donell <carlos@redhat.com> | 2014-07-29 23:27:21 -0400 |
| commit | 0961f7e1e300ef633b0c1ad95d0999fb5c169f4e (patch) | |
| tree | 08b1ae51840c0b69a0c4bf9f98b8a71b919d2fa0 /sysdeps/unix | |
| parent | cc5fb300fce0c7ce1923d6f5c776fa83be47d55e (diff) | |
| download | glibc-0961f7e1e300ef633b0c1ad95d0999fb5c169f4e.zip glibc-0961f7e1e300ef633b0c1ad95d0999fb5c169f4e.tar.gz glibc-0961f7e1e300ef633b0c1ad95d0999fb5c169f4e.tar.bz2 | |
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.
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/bits/fcntl-linux.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h index 527eb5c..e224dab 100644 --- a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h +++ b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h @@ -117,6 +117,23 @@ # define F_SETLKW64 14 /* Set record locking info (blocking). */ #endif +/* 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 + #ifdef __USE_LARGEFILE64 # define O_LARGEFILE __O_LARGEFILE #endif |