1 /* $Id: fcntl.h,v 1.11 1998/10/26 20:03:10 davem Exp $ */
5 /* open/fcntl - O_SYNC is only implemented on blocks devices and on files
6 located on an ext2 file system */
7 #define O_RDONLY 0x0000
8 #define O_WRONLY 0x0001
10 #define O_ACCMODE 0x0003
11 #define O_APPEND 0x0008
12 #define FASYNC 0x0040 /* fcntl, for BSD compatibility */
13 #define O_CREAT 0x0200 /* not fcntl */
14 #define O_TRUNC 0x0400 /* not fcntl */
15 #define O_EXCL 0x0800 /* not fcntl */
17 #define O_NONBLOCK 0x4000
18 #define O_NDELAY (0x0004 | O_NONBLOCK)
19 #define O_NOCTTY 0x8000 /* not fcntl */
20 #define O_DIRECTORY 0x10000 /* must be a directory */
21 #define O_NOFOLLOW 0x20000 /* don't follow links */
23 #define F_DUPFD 0 /* dup */
24 #define F_GETFD 1 /* get f_flags */
25 #define F_SETFD 2 /* set f_flags */
26 #define F_GETFL 3 /* more flags (cloexec) */
28 #define F_GETOWN 5 /* for sockets. */
29 #define F_SETOWN 6 /* for sockets. */
33 #define F_SETSIG 10 /* for sockets. */
34 #define F_GETSIG 11 /* for sockets. */
36 /* for F_[GET|SET]FL */
37 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */
39 /* for posix fcntl() and lockf() */
44 /* for old implementation of bsd flock () */
45 #define F_EXLCK 4 /* or 3 */
46 #define F_SHLCK 8 /* or 4 */
48 /* operations for bsd flock(), also used by the kernel implementation */
49 #define LOCK_SH 1 /* shared lock */
50 #define LOCK_EX 2 /* exclusive lock */
51 #define LOCK_NB 4 /* or'd with one of the above to prevent
53 #define LOCK_UN 8 /* remove lock */