1/* $Id$ */
2
3/***
4  This file is part of avahi.
5
6  avahi is free software; you can redistribute it and/or modify it
7  under the terms of the GNU Lesser General Public License as
8  published by the Free Software Foundation; either version 2.1 of the
9  License, or (at your option) any later version.
10
11  avahi is distributed in the hope that it will be useful, but WITHOUT
12  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14  Public License for more details.
15
16  You should have received a copy of the GNU Lesser General Public
17  License along with avahi; if not, write to the Free Software
18  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19  USA.
20***/
21
22#ifdef HAVE_CONFIG_H
23#include <config.h>
24#endif
25
26#include <sys/select.h>
27#include <unistd.h>
28#include <fcntl.h>
29#include <assert.h>
30
31#include "fdutil.h"
32
33int avahi_set_cloexec(int fd) {
34    int n;
35
36    assert(fd >= 0);
37
38    if ((n = fcntl(fd, F_GETFD)) < 0)
39        return -1;
40
41    if (n & FD_CLOEXEC)
42        return 0;
43
44    return fcntl(fd, F_SETFD, n|FD_CLOEXEC);
45}
46
47int avahi_set_nonblock(int fd) {
48    int n;
49
50    assert(fd >= 0);
51
52    if ((n = fcntl(fd, F_GETFL)) < 0)
53        return -1;
54
55    if (n & O_NONBLOCK)
56        return 0;
57
58    return fcntl(fd, F_SETFL, n|O_NONBLOCK);
59}
60
61int avahi_wait_for_write(int fd) {
62    fd_set fds;
63    int r;
64
65    FD_ZERO(&fds);
66    FD_SET(fd, &fds);
67
68    if ((r = select(fd+1, NULL, &fds, NULL, NULL)) < 0)
69        return -1;
70
71    assert(r > 0);
72
73    return 0;
74}
75