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