blob: f988de5fe9daa53f4679574a16803400bb973c11 (
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
|
#ifndef __EVIL_FCNTL_H__
#define __EVIL_FCNTL_H__
# include <sys/types.h>
#if _MSC_VER
# define _CRT_DECLARE_NONSTDC_NAMES 1
# include <fcntl.h>
# undef _CRT_DECLARE_NONSTDC_NAMES
#endif
/**
* @def O_ACCMODE
* O_ACCMODE is an AND mask to extract file access modes.
*/
#ifdef _MSC_VER
# define O_ACCMODE 3
#endif
/**
* @def FD_CLOEXEC
* Specifies that the file descriptor should be closed when an exec()
* function is invoked.
*/
# define FD_CLOEXEC 1
/**
* @def O_NONBLOCK
* Specifies that the socket is in non-blocking mode.
*/
# define O_NONBLOCK 04000
/**
* @def F_SETFD
* Specifies that fcntl() should set the file descriptor flags
* associated with the filedes argument.
*/
/**
* @def F_SETLK
* Specifies that fcntl() should set or clear a file segment lock
* according to the lock description pointed to by the third argument.
*/
/**
* @def F_SETLKW
* Equivalent to F_SETLK except that if a shared or exclusive lock
* is blocked by other locks, the thread shall wait until the request
* can be satisfied.
*/
# define F_GETFD 1
# define F_SETFD 2
# define F_GETFL 3
# define F_SETFL 4
# define F_SETLK 6
# define F_SETLKW 7
/**
* @def F_RDLCK
* Read (or shared) lock
*/
/**
* @def F_WRLCK
* Write (or exclusive) lock
*/
/**
* @def F_UNLCK
* Remove lock
*/
# ifndef F_RDLCK
# define F_RDLCK 0
# define F_WRLCK 1
# define F_UNLCK 2
# endif /* ! F_RDLCK */
/**
* @struct flock
* @brief A structure that controls the lock of a file descriptor.
*/
struct flock
{
short int l_type; /**< lock type: read, write, ... */
short int l_whence; /**< type of l_start */
off_t l_start; /**< starting offset */
off_t l_len; /**< 0 means end of the file */
pid_t l_pid; /**< lock owner */
};
/**
* @brief Provide control over file descriptors.
*
* @param fd The file descriptor.
* @param cmd The type of control.
* @return 0 on success, -1 otherwise.
*
* Performs one of various miscellaneous operations on @p fd.
* The operation in question is determined by @p cmd:
*
* - F_SETFD: Set the close-on-exec flag to the value specified
* by the argument after command (only the least significant
* bit is used).
* - F_SETLK and F_SETLKW: used to manage discretionary file locks.
* The third argument must be a pointer to a struct flock (that
* may be overwritten by this call).
*
* This function returns 0 on success, -1 otherwise.
*
* Conformity: None.
*
* Supported OS: Windows Vista, Windows XP or Windows 2000
* Professional.
*
* @ingroup Evil
*/
EVIL_API int fcntl(int fd, int cmd, ...);
#endif /* __EVIL_FCNTL_H__ */
|
