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
28int 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
47err_close_pipe:
48	usbi_close(pipefd[0]);
49	usbi_close(pipefd[1]);
50	return ret;
51}
52