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
|
/*
* Copyright (C) 2003-2011 The Music Player Daemon Project
* http://www.musicpd.org
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - 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.
*
* 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 FOUNDATION 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.
*/
/*
* This library provides easy helper functions for working with file
* descriptors. It has wrappers for taking advantage of Linux 2.6
* specific features like O_CLOEXEC.
*
*/
#ifndef FD_UTIL_H
#define FD_UTIL_H
#include <stdbool.h>
#include <stddef.h>
#ifndef WIN32
#if !defined(_GNU_SOURCE) && (defined(HAVE_PIPE2) || defined(HAVE_ACCEPT4))
#define _GNU_SOURCE
#endif
#include <sys/types.h>
#endif
struct sockaddr;
/**
* Wrapper for dup(), which sets the CLOEXEC flag on the new
* descriptor.
*/
int
dup_cloexec(int oldfd);
/**
* Wrapper for open(), which sets the CLOEXEC flag (atomically if
* supported by the OS).
*/
int
open_cloexec(const char *path_fs, int flags, int mode);
/**
* Wrapper for pipe(), which sets the CLOEXEC flag (atomically if
* supported by the OS).
*/
int
pipe_cloexec(int fd[2]);
/**
* Wrapper for pipe(), which sets the CLOEXEC flag (atomically if
* supported by the OS).
*
* On systems that supports it (everybody except for Windows), it also
* sets the NONBLOCK flag.
*/
int
pipe_cloexec_nonblock(int fd[2]);
#ifndef WIN32
/**
* Wrapper for socketpair(), which sets the CLOEXEC flag (atomically
* if supported by the OS).
*/
int
socketpair_cloexec(int domain, int type, int protocol, int sv[2]);
/**
* Wrapper for socketpair(), which sets the flags CLOEXEC and NONBLOCK
* (atomically if supported by the OS).
*/
int
socketpair_cloexec_nonblock(int domain, int type, int protocol, int sv[2]);
#endif
/**
* Wrapper for socket(), which sets the CLOEXEC and the NONBLOCK flag
* (atomically if supported by the OS).
*/
int
socket_cloexec_nonblock(int domain, int type, int protocol);
/**
* Wrapper for accept(), which sets the CLOEXEC and the NONBLOCK flags
* (atomically if supported by the OS).
*/
int
accept_cloexec_nonblock(int fd, struct sockaddr *address,
size_t *address_length_r);
#ifndef WIN32
struct msghdr;
/**
* Wrapper for recvmsg(), which sets the CLOEXEC flag (atomically if
* supported by the OS).
*/
ssize_t
recvmsg_cloexec(int sockfd, struct msghdr *msg, int flags);
#endif
/**
* Wrapper for inotify_init(), which sets the CLOEXEC flag (atomically
* if supported by the OS).
*/
int
inotify_init_cloexec(void);
#endif
|
