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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 <config.h>
22 
23 #include <unistd.h>
24 #include <fcntl.h>
25 #include <errno.h>
26 #include <stdlib.h>
27 
28 #include "libusbi.h"
29 
usbi_pipe(int pipefd[2])30 int usbi_pipe(int pipefd[2])
31 {
32 	int ret = pipe(pipefd);
33 	if (ret != 0) {
34 		return ret;
35 	}
36 	ret = fcntl(pipefd[1], F_GETFL);
37 	if (ret == -1) {
38 		usbi_dbg("Failed to get pipe fd flags: %d", errno);
39 		goto err_close_pipe;
40 	}
41 	ret = fcntl(pipefd[1], F_SETFL, ret | O_NONBLOCK);
42 	if (ret != 0) {
43 		usbi_dbg("Failed to set non-blocking on new pipe: %d", errno);
44 		goto err_close_pipe;
45 	}
46 
47 	return 0;
48 
49 err_close_pipe:
50 	usbi_close(pipefd[0]);
51 	usbi_close(pipefd[1]);
52 	return ret;
53 }
54