1 | /* Create socket with an unspecified address family for use with ioctl. |
2 | Copyright (C) 1999-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C 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 | The GNU C 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 the GNU C Library; if not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <errno.h> |
20 | #include <sys/socket.h> |
21 | |
22 | /* Return a socket of any type. The socket can be used in subsequent |
23 | ioctl calls to talk to the kernel. */ |
24 | int |
25 | __opensock (void) |
26 | { |
27 | /* SOCK_DGRAM is supported by all address families. */ |
28 | int type = SOCK_DGRAM | SOCK_CLOEXEC; |
29 | int fd; |
30 | |
31 | fd = __socket (AF_UNIX, type, 0); |
32 | if (fd >= 0) |
33 | return fd; |
34 | fd = __socket (AF_INET, type, 0); |
35 | if (fd >= 0) |
36 | return fd; |
37 | fd = __socket (AF_INET6, type, 0); |
38 | if (fd >= 0) |
39 | return fd; |
40 | __set_errno (ENOENT); |
41 | return fd; |
42 | } |
43 | |