aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/unix/bsd/bits/fcntl.h
blob: 4081b4d0dbb1ae6292f11e84f0921706f0ef35fe (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
/* O_*, F_*, FD_* bit values for 4.3 BSD.
   Copyright (C) 1991, 1992, 1997 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifndef	_FCNTL_H
# error "Never use <bits/fcntl.h> directly; include <fcntl.h> instead."
#endif


/* File access modes for `open' and `fcntl'.  */
#define	O_RDONLY	0	/* Open read-only.  */
#define	O_WRONLY	1	/* Open write-only.  */
#define	O_RDWR		2	/* Open read/write.  */


/* Bits OR'd into the second argument to open.  */
#define	O_CREAT		0x0200	/* Create file if it doesn't exist.  */
#define	O_EXCL		0x0800	/* Fail if file already exists.  */
#define	O_TRUNC		0x0400	/* Truncate file to zero length.  */
/* Apparently not assigning a controlling terminal is the default
   behavior in BSD, so no bit is required to request that behavior.  */
#define	O_NOCTTY	0	/* Don't assign a controlling terminal.  */
#if defined __USE_BSD || defined __USE_SVID
# define O_ASYNC		0x0040	/* Send SIGIO to owner when data is ready.  */
# define O_FSYNC		0x2000	/* Synchronous writes.  */
# define O_SYNC		O_FSYNC
#endif

/* File status flags for `open' and `fcntl'.  */
#define	O_APPEND	0x0008	/* Writes append to the file.  */
#define	O_NONBLOCK	0x0004	/* Non-blocking I/O.  */

#ifdef __USE_BSD
/* BSD before 4.4 doesn't support POSIX.1 O_NONBLOCK,
   but O_NDELAY is close.  */
# define O_NDELAY	O_NONBLOCK
#endif

#ifdef __USE_BSD
/* Bits in the file status flags returned by F_GETFL.
   These are all the O_* flags, plus FREAD and FWRITE, which are
   independent bits set by which of O_RDONLY, O_WRONLY, and O_RDWR, was
   given to `open'.  */
# define FREAD		1
# define FWRITE		2

/* Traditional BSD names the O_* bits.  */
# define FASYNC		O_ASYNC
# define FCREAT		O_CREAT
# define FEXCL		O_EXCL
# define FTRUNC		O_TRUNC
# define FNOCTTY	O_NOCTTY
# define FFSYNC		O_FSYNC
# define FSYNC		O_SYNC
# define FAPPEND	O_APPEND
# define FNONBLOCK	O_NONBLOCK
# define FNDELAY	O_NDELAY
#endif

/* Mask for file access modes.  This is system-dependent in case
   some system ever wants to define some other flavor of access.  */
#define	O_ACCMODE	(O_RDONLY|O_WRONLY|O_RDWR)

/* XXX missing */
#define O_LARGEFILE	0

/* Values for the second argument to `fcntl'.  */
#define	F_DUPFD	  	0	/* Duplicate file descriptor.  */
#define	F_GETFD		1	/* Get file descriptor flags.  */
#define	F_SETFD		2	/* Set file descriptor flags.  */
#define	F_GETFL		3	/* Get file status flags.  */
#define	F_SETFL		4	/* Set file status flags.  */
#ifdef __USE_BSD
# define F_GETOWN	5	/* Get owner (receiver of SIGIO).  */
# define F_SETOWN	6	/* Set owner (receiver of SIGIO).  */
#endif
#define	F_GETLK		7	/* Get record locking info.  */
#define	F_SETLK		8	/* Set record locking info (non-blocking).  */
#define	F_SETLKW	9	/* Set record locking info (blocking).  */

/* XXX missing */
#define F_GETLK64	7	/* Get record locking info.  */
#define F_SETLK64	8	/* Set record locking info (non-blocking).  */
#define F_SETLKW64	9	/* Set record locking info (blocking).  */

/* File descriptor flags used with F_GETFD and F_SETFD.  */
#define	FD_CLOEXEC	1	/* Close on exec.  */


#include <bits/types.h>

/* The structure describing an advisory lock.  This is the type of the third
   argument to `fcntl' for the F_GETLK, F_SETLK, and F_SETLKW requests.  */
struct flock
  {
    short int l_type;	/* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
    short int l_whence;	/* Where `l_start' is relative to (like `lseek').  */
#ifndef __USE_FILE_OFFSET64
    __off_t l_start;	/* Offset where the lock begins.  */
    __off_t l_len;	/* Size of the locked area; zero means until EOF.  */
#else
    __off64_t l_start;	/* Offset where the lock begins.  */
    __off64_t l_len;	/* Size of the locked area; zero means until EOF.  */
#endif
    short int l_pid;	/* Process holding the lock.  */
    short int l_xxx;	/* Reserved for future use.  */
  };

#ifdef __USE_LARGEFILE64
struct flock64
  {
    short int l_type;	/* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.  */
    short int l_whence;	/* Where `l_start' is relative to (like `lseek').  */
    __off64_t l_start;	/* Offset where the lock begins.  */
    __off64_t l_len;	/* Size of the locked area; zero means until EOF.  */
    short int l_pid;	/* Process holding the lock.  */
    short int l_xxx;	/* Reserved for future use.  */
  };
#endif

/* Values for the `l_type' field of a `struct flock'.  */
#define	F_RDLCK	1	/* Read lock.  */
#define	F_WRLCK	2	/* Write lock.  */
#define	F_UNLCK	3	/* Remove lock.  */