1/*-
2 * Copyright (c) 2012 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Pawel Jakub Dawidek under sponsorship from
6 * the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $P4: //depot/projects/trustedbsd/openbsm/bin/auditdistd/sigtimedwait.h#1 $
30 */
31
32#ifndef _SIGTIMEDWAIT_H_
33#define _SIGTIMEDWAIT_H_
34
35#include <sys/types.h>
36#include <sys/time.h>
37
38#include <assert.h>
39#include <errno.h>
40#include <signal.h>
41#include <stdio.h>
42#include <string.h>
43#include <unistd.h>
44
45#include <pjdlog.h>
46
47static int
48sigtimedwait(const sigset_t *set, siginfo_t *info,
49 const struct timespec *timeout)
50{
51 struct itimerval it;
52 sigset_t mask;
53 int error, signo;
54
55 PJDLOG_ASSERT(info == NULL);
56
57 PJDLOG_VERIFY(sigemptyset(&mask) == 0);
58 PJDLOG_VERIFY(sigaddset(&mask, SIGALRM) == 0);
59 PJDLOG_VERIFY(sigprocmask(SIG_BLOCK, &mask, NULL) == 0);
60
61 timerclear(&it.it_interval);
62 it.it_value.tv_sec = timeout->tv_sec;
63 it.it_value.tv_usec = timeout->tv_nsec / 1000;
64 if (it.it_value.tv_sec == 0 && it.it_value.tv_usec == 0)
65 it.it_value.tv_usec = 1;
66 PJDLOG_VERIFY(setitimer(ITIMER_REAL, &it, NULL) == 0);
67
68 bcopy(set, &mask, sizeof(mask));
69 PJDLOG_VERIFY(sigaddset(&mask, SIGALRM) == 0);
70
71 PJDLOG_VERIFY(sigwait(&mask, &signo) == 0);
72 error = errno;
73
74 timerclear(&it.it_interval);
75 timerclear(&it.it_value);
76 PJDLOG_VERIFY(setitimer(ITIMER_REAL, &it, NULL) == 0);
77
78 PJDLOG_VERIFY(sigemptyset(&mask) == 0);
79 PJDLOG_VERIFY(sigaddset(&mask, SIGALRM) == 0);
80 PJDLOG_VERIFY(sigprocmask(SIG_UNBLOCK, &mask, NULL) == 0);
81
82 if (signo == SIGALRM) {
83 errno = EAGAIN;
84 signo = -1;
85 } else {
86 errno = error;
87 }
88
89 return (signo);
90}
91
92#endif /* !_SIGTIMEDWAIT_H_ */