1 | /* |
---|
2 | * dhcpcd - DHCP client daemon |
---|
3 | * Copyright (c) 2006-2013 Roy Marples <roy@marples.name> |
---|
4 | * All rights reserved |
---|
5 | |
---|
6 | * Redistribution and use in source and binary forms, with or without |
---|
7 | * modification, are permitted provided that the following conditions |
---|
8 | * are met: |
---|
9 | * 1. Redistributions of source code must retain the above copyright |
---|
10 | * notice, this list of conditions and the following disclaimer. |
---|
11 | * 2. Redistributions in binary form must reproduce the above copyright |
---|
12 | * notice, this list of conditions and the following disclaimer in the |
---|
13 | * documentation and/or other materials provided with the distribution. |
---|
14 | * |
---|
15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
---|
16 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
---|
17 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
---|
18 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
---|
19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
---|
20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
---|
21 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
---|
22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
---|
23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
---|
24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
---|
25 | * SUCH DAMAGE. |
---|
26 | */ |
---|
27 | |
---|
28 | #include <sys/time.h> |
---|
29 | #include <sys/types.h> |
---|
30 | |
---|
31 | #include <limits.h> |
---|
32 | #include <poll.h> |
---|
33 | #include <signal.h> |
---|
34 | #include <unistd.h> |
---|
35 | |
---|
36 | #include "pollts.h" |
---|
37 | |
---|
38 | int |
---|
39 | pollts(struct pollfd *restrict fds, nfds_t nfds, |
---|
40 | const struct timespec *restrict ts, const sigset_t *restrict sigmask) |
---|
41 | { |
---|
42 | fd_set read_fds; |
---|
43 | nfds_t n; |
---|
44 | int maxfd, r; |
---|
45 | |
---|
46 | FD_ZERO(&read_fds); |
---|
47 | maxfd = 0; |
---|
48 | for (n = 0; n < nfds; n++) { |
---|
49 | if (fds[n].events & POLLIN) { |
---|
50 | FD_SET(fds[n].fd, &read_fds); |
---|
51 | if (fds[n].fd > maxfd) |
---|
52 | maxfd = fds[n].fd; |
---|
53 | } |
---|
54 | } |
---|
55 | |
---|
56 | r = pselect(maxfd + 1, &read_fds, NULL, NULL, ts, sigmask); |
---|
57 | if (r > 0) { |
---|
58 | for (n = 0; n < nfds; n++) { |
---|
59 | fds[n].revents = |
---|
60 | FD_ISSET(fds[n].fd, &read_fds) ? POLLIN : 0; |
---|
61 | } |
---|
62 | } |
---|
63 | |
---|
64 | return r; |
---|
65 | } |
---|