1 /***
2 This file is part of libdaemon.
3
4 Copyright 2003-2008 Lennart Poettering
5
6 libdaemon is free software; you can redistribute it and/or modify
7 it 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 libdaemon is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with libdaemon. If not, see
18 <http://www.gnu.org/licenses/>.
19 ***/
20
21 #ifdef HAVE_CONFIG_H
22 #include <config.h>
23 #endif
24
25 #include <fcntl.h>
26
27 #include "dnonblock.h"
28
daemon_nonblock(int fd,int b)29 int daemon_nonblock(int fd, int b) {
30 int a, c;
31
32 if ((a = fcntl(fd, F_GETFL)) < 0)
33 return -1;
34
35 if (b)
36 c = a | O_NONBLOCK;
37 else
38 c = a & ~O_NONBLOCK;
39
40 if (c == a)
41 return 0;
42
43 return fcntl(fd, F_SETFL, c);
44 }
45