1 /*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <errno.h>
30 #include <signal.h>
31 #include <string.h>
32 #include <time.h>
33
34 #include "private/kernel_sigset_t.h"
35
36 extern "C" int __rt_sigtimedwait(const sigset_t* uthese, siginfo_t* uinfo, const struct timespec* uts, size_t sigsetsize);
37
sigwait(const sigset_t * set,int * sig)38 int sigwait(const sigset_t* set, int* sig) {
39 kernel_sigset_t sigset(set);
40 while (true) {
41 // __rt_sigtimedwait can return EAGAIN or EINTR, we need to loop
42 // around them since sigwait is only allowed to return EINVAL.
43 int result = __rt_sigtimedwait(sigset.get(), NULL, NULL, sizeof(sigset));
44 if (result >= 0) {
45 *sig = result;
46 return 0;
47 }
48
49 if (errno != EAGAIN && errno != EINTR) {
50 return errno;
51 }
52 }
53 }
54