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
140
141
142
143
144
145
146
147
148
149
150
|
/********************************************************************************
* include/fcntl.h
*
* Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
********************************************************************************/
#ifndef __INCLUDE_FCNTL_H
#define __INCLUDE_FCNTL_H
/********************************************************************************
* Included Files
********************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
/********************************************************************************
* Definitions
********************************************************************************/
/* open flag settings for open() (and related APIs) */
#define O_RDONLY 0x01 /* Open for read access */
#define O_WRONLY 0x02 /* Open for write access */
#define O_RDWR 0x03 /* Open for both read & write access */
#define O_CREAT 0x04 /* Create file/sem/mq object */
#define O_EXCL 0x08 /* Name must not exist when opened */
#define O_APPEND 0x10 /* Keep contents, append to end */
#define O_TRUNC 0x20 /* Delete contents */
#define O_NONBLOCK 0x40 /* Don't wait for data */
#define O_NDELAY O_NONBLOCK
#define O_SYNC 0x80 /* Synchronize output on write */
#define O_DSYNC O_SYNC
#define O_RSYNC 0x00 /* Sychronize input on read */
#define O_ACCMODE 0x00 /* Required by POSIX */
#define O_NOCTTY 0x00 /* Reqired by POSIX */
#define O_RDOK O_RDONLY /* Not POSIX */
#define O_WROK O_WRONLY /* Not POSIX */
/* fcntl() commands */
#define F_DUPFD 0 /* Duplicate a file descriptor */
#define F_GETFD 1 /* Read the file descriptor flags */
#define F_GETFL 2 /* Read the file status flags */
#define F_GETLEASE 3 /* Indicas what type of lease is held on fd (linux) */
#define F_GETLK 4 /* Check if we could place a lock */
#define F_GETOWN 5 /* Get the pid receiving SIGIO and SIGURG signals for fd */
#define F_GETSIG 6 /* Get the signal sent */
#define F_NOTIFY 7 /* Provide notification when directory referred to by fd changes (linux)*/
#define F_SETFD 8 /* Set the file descriptor flags to value */
#define F_SETFL 9 /* Set the file status flags to the value */
#define F_SETLEASE 10 /* Set or remove file lease (linux) */
#define F_SETLK 11 /* Acquire or release a lock on range of bytes */
#define F_SETLKW 12 /* Like F_SETLK, but wait for lock to become available */
#define F_SETOWN 13 /* Set pid that will receive SIGIO and SIGURG signals for fd */
#define F_SETSIG 14 /* Set the signal to be sent */
/* For posix fcntl() and lockf() */
#define F_RDLCK 0 /* Take out a read lease */
#define F_WRLCK 1 /* Take out a write lease */
#define F_UNLCK 2 /* Remove a lease */
/* close-on-exec flag for F_GETRL and F_SETFL */
#define FD_CLOEXEC 1
/* These are the notifications that can be received from F_NOTIFY (linux) */
#define DN_ACCESS 0 /* A file was accessed */
#define DN_MODIFY 1 /* A file was modified */
#define DN_CREATE 2 /* A file was created */
#define DN_DELETE 3 /* A file was unlinked */
#define DN_RENAME 4 /* A file was renamed */
#define DN_ATTRIB 5 /* Attributes of a file were changed */
/********************************************************************************
* Public Type Definitions
********************************************************************************/
/* struct flock is the third argument for F_GETLK, F_SETLK and F_SETLKW */
struct flock
{
sint16 l_type; /* Type of lock: F_RDLCK, F_WRLCK, F_UNLCK */
sint16 l_whence; /* How to interpret l_start: SEEK_SET, SEEK_CUR, SEEK_END */
off_t l_start; /* Starting offset for lock */
off_t l_len; /* Number of bytes to lock */
pid_t l_pid; /* PID of process blocking our lock (F_GETLK only) */
};
/********************************************************************************
* Public Variables
********************************************************************************/
/********************************************************************************
* Public Function Prototypes
********************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/* POSIX-like File System Interfaces */
EXTERN int creat(const char *path, mode_t mode);
EXTERN int open(const char *path, int oflag, ...);
EXTERN int fcntl(int fd, int cmd, ...);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_FCNTL_H */
|
