1 /*
2 * poll_posix: poll compatibility wrapper for POSIX systems
3 * Copyright © 2013 RealVNC Ltd.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 */
20
21 #include <unistd.h>
22 #include <fcntl.h>
23 #include <errno.h>
24 #include <stdlib.h>
25
26 #include "libusbi.h"
27
usbi_pipe(int pipefd[2])28 int usbi_pipe(int pipefd[2])
29 {
30 int ret = pipe(pipefd);
31 if (ret != 0) {
32 return ret;
33 }
34 ret = fcntl(pipefd[1], F_GETFL);
35 if (ret == -1) {
36 usbi_dbg("Failed to get pipe fd flags: %d", errno);
37 goto err_close_pipe;
38 }
39 ret = fcntl(pipefd[1], F_SETFL, ret | O_NONBLOCK);
40 if (ret != 0) {
41 usbi_dbg("Failed to set non-blocking on new pipe: %d", errno);
42 goto err_close_pipe;
43 }
44
45 return 0;
46
47 err_close_pipe:
48 usbi_close(pipefd[0]);
49 usbi_close(pipefd[1]);
50 return ret;
51 }
52