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fcntl.h
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1 #ifndef _ASM_GENERIC_FCNTL_H
2 #define _ASM_GENERIC_FCNTL_H
3 
4 #include <linux/types.h>
5 
6 /*
7  * FMODE_EXEC is 0x20
8  * FMODE_NONOTIFY is 0x1000000
9  * These cannot be used by userspace O_* until internal and external open
10  * flags are split.
11  * -Eric Paris
12  */
13 
14 /*
15  * When introducing new O_* bits, please check its uniqueness in fcntl_init().
16  */
17 
18 #define O_ACCMODE 00000003
19 #define O_RDONLY 00000000
20 #define O_WRONLY 00000001
21 #define O_RDWR 00000002
22 #ifndef O_CREAT
23 #define O_CREAT 00000100 /* not fcntl */
24 #endif
25 #ifndef O_EXCL
26 #define O_EXCL 00000200 /* not fcntl */
27 #endif
28 #ifndef O_NOCTTY
29 #define O_NOCTTY 00000400 /* not fcntl */
30 #endif
31 #ifndef O_TRUNC
32 #define O_TRUNC 00001000 /* not fcntl */
33 #endif
34 #ifndef O_APPEND
35 #define O_APPEND 00002000
36 #endif
37 #ifndef O_NONBLOCK
38 #define O_NONBLOCK 00004000
39 #endif
40 #ifndef O_DSYNC
41 #define O_DSYNC 00010000 /* used to be O_SYNC, see below */
42 #endif
43 #ifndef FASYNC
44 #define FASYNC 00020000 /* fcntl, for BSD compatibility */
45 #endif
46 #ifndef O_DIRECT
47 #define O_DIRECT 00040000 /* direct disk access hint */
48 #endif
49 #ifndef O_LARGEFILE
50 #define O_LARGEFILE 00100000
51 #endif
52 #ifndef O_DIRECTORY
53 #define O_DIRECTORY 00200000 /* must be a directory */
54 #endif
55 #ifndef O_NOFOLLOW
56 #define O_NOFOLLOW 00400000 /* don't follow links */
57 #endif
58 #ifndef O_NOATIME
59 #define O_NOATIME 01000000
60 #endif
61 #ifndef O_CLOEXEC
62 #define O_CLOEXEC 02000000 /* set close_on_exec */
63 #endif
64 
65 /*
66  * Before Linux 2.6.33 only O_DSYNC semantics were implemented, but using
67  * the O_SYNC flag. We continue to use the existing numerical value
68  * for O_DSYNC semantics now, but using the correct symbolic name for it.
69  * This new value is used to request true Posix O_SYNC semantics. It is
70  * defined in this strange way to make sure applications compiled against
71  * new headers get at least O_DSYNC semantics on older kernels.
72  *
73  * This has the nice side-effect that we can simply test for O_DSYNC
74  * wherever we do not care if O_DSYNC or O_SYNC is used.
75  *
76  * Note: __O_SYNC must never be used directly.
77  */
78 #ifndef O_SYNC
79 #define __O_SYNC 04000000
80 #define O_SYNC (__O_SYNC|O_DSYNC)
81 #endif
82 
83 #ifndef O_PATH
84 #define O_PATH 010000000
85 #endif
86 
87 #ifndef O_NDELAY
88 #define O_NDELAY O_NONBLOCK
89 #endif
90 
91 #define F_DUPFD 0 /* dup */
92 #define F_GETFD 1 /* get close_on_exec */
93 #define F_SETFD 2 /* set/clear close_on_exec */
94 #define F_GETFL 3 /* get file->f_flags */
95 #define F_SETFL 4 /* set file->f_flags */
96 #ifndef F_GETLK
97 #define F_GETLK 5
98 #define F_SETLK 6
99 #define F_SETLKW 7
100 #endif
101 #ifndef F_SETOWN
102 #define F_SETOWN 8 /* for sockets. */
103 #define F_GETOWN 9 /* for sockets. */
104 #endif
105 #ifndef F_SETSIG
106 #define F_SETSIG 10 /* for sockets. */
107 #define F_GETSIG 11 /* for sockets. */
108 #endif
109 
110 #ifndef CONFIG_64BIT
111 #ifndef F_GETLK64
112 #define F_GETLK64 12 /* using 'struct flock64' */
113 #define F_SETLK64 13
114 #define F_SETLKW64 14
115 #endif
116 #endif
117 
118 #ifndef F_SETOWN_EX
119 #define F_SETOWN_EX 15
120 #define F_GETOWN_EX 16
121 #endif
122 
123 #ifndef F_GETOWNER_UIDS
124 #define F_GETOWNER_UIDS 17
125 #endif
126 
127 #define F_OWNER_TID 0
128 #define F_OWNER_PID 1
129 #define F_OWNER_PGRP 2
130 
131 struct f_owner_ex {
132  int type;
134 };
135 
136 /* for F_[GET|SET]FL */
137 #define FD_CLOEXEC 1 /* actually anything with low bit set goes */
138 
139 /* for posix fcntl() and lockf() */
140 #ifndef F_RDLCK
141 #define F_RDLCK 0
142 #define F_WRLCK 1
143 #define F_UNLCK 2
144 #endif
145 
146 /* for old implementation of bsd flock () */
147 #ifndef F_EXLCK
148 #define F_EXLCK 4 /* or 3 */
149 #define F_SHLCK 8 /* or 4 */
150 #endif
151 
152 /* operations for bsd flock(), also used by the kernel implementation */
153 #define LOCK_SH 1 /* shared lock */
154 #define LOCK_EX 2 /* exclusive lock */
155 #define LOCK_NB 4 /* or'd with one of the above to prevent
156  blocking */
157 #define LOCK_UN 8 /* remove lock */
159 #define LOCK_MAND 32 /* This is a mandatory flock ... */
160 #define LOCK_READ 64 /* which allows concurrent read operations */
161 #define LOCK_WRITE 128 /* which allows concurrent write operations */
162 #define LOCK_RW 192 /* which allows concurrent read & write ops */
164 #define F_LINUX_SPECIFIC_BASE 1024
165 
166 #ifndef HAVE_ARCH_STRUCT_FLOCK
167 #ifndef __ARCH_FLOCK_PAD
168 #define __ARCH_FLOCK_PAD
169 #endif
171 struct flock {
172  short l_type;
173  short l_whence;
178 };
179 #endif
180 
181 #ifndef CONFIG_64BIT
182 
183 #ifndef HAVE_ARCH_STRUCT_FLOCK64
184 #ifndef __ARCH_FLOCK64_PAD
185 #define __ARCH_FLOCK64_PAD
186 #endif
188 struct flock64 {
189  short l_type;
190  short l_whence;
195 };
196 #endif
197 #endif /* !CONFIG_64BIT */
198 
199 #endif /* _ASM_GENERIC_FCNTL_H */