1/* Set the sun_path member of struct sockaddr_un.
2 Copyright (C) 2022-2023 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 <string.h>
21#include <sys/socket.h>
22#include <sys/un.h>
23
24int
25__sockaddr_un_set (struct sockaddr_un *addr, const char *pathname)
26{
27 size_t name_length = strlen (pathname);
28
29 /* The kernel supports names of exactly sizeof (addr->sun_path)
30 bytes, without a null terminator, but userspace does not; see the
31 SUN_LEN macro. */
32 if (name_length >= sizeof (addr->sun_path))
33 {
34 __set_errno (EINVAL); /* Error code used by the kernel. */
35 return -1;
36 }
37
38 addr->sun_family = AF_UNIX;
39 memcpy (addr->sun_path, pathname, name_length + 1);
40 return 0;
41}
42