mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 09:40:13 +00:00
6eaf10cbb7
It is not possible to use interface ioctls with netlink sockets
on all Linux kernels.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
(cherry picked from commit 3d981795cd)
43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/* Create socket with an unspecified address family for use with ioctl.
|
|
Copyright (C) 1999-2021 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <errno.h>
|
|
#include <sys/socket.h>
|
|
|
|
/* Return a socket of any type. The socket can be used in subsequent
|
|
ioctl calls to talk to the kernel. */
|
|
int
|
|
__opensock (void)
|
|
{
|
|
/* SOCK_DGRAM is supported by all address families. */
|
|
int type = SOCK_DGRAM | SOCK_CLOEXEC;
|
|
int fd;
|
|
|
|
fd = __socket (AF_UNIX, type, 0);
|
|
if (fd >= 0)
|
|
return fd;
|
|
fd = __socket (AF_INET, type, 0);
|
|
if (fd >= 0)
|
|
return fd;
|
|
fd = __socket (AF_INET6, type, 0);
|
|
if (fd >= 0)
|
|
return fd;
|
|
__set_errno (ENOENT);
|
|
return fd;
|
|
}
|