blob: 0080c52bdfde29160bca3760155cfd8b82f43a14 (
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
|
/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2015, Joyent, Inc.
*/
#include <sys/signalfd.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
int
signalfd(int fd, const sigset_t *mask, int flags)
{
int origfd = fd;
if (fd == -1) {
int oflags = O_RDONLY;
if (flags & ~(SFD_NONBLOCK | SFD_CLOEXEC)) {
errno = EINVAL;
return (-1);
}
if (flags & SFD_NONBLOCK)
oflags |= O_NONBLOCK;
if (flags & SFD_CLOEXEC)
oflags |= O_CLOEXEC;
if ((fd = open("/dev/signalfd", oflags)) < 0)
return (-1);
}
if (ioctl(fd, SIGNALFDIOC_MASK, mask) != 0) {
if (origfd == -1) {
int old = errno;
(void) close(fd);
errno = old;
}
/*
* Trying to modify an existing sigfd so if this failed
* it's because it's not a valid fd or not a sigfd. ioctl
* returns the correct errno for these cases.
*/
return (-1);
}
return (fd);
}
|
