63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
|
/* Example of Local-Namespace Sockets
|
||
|
|
Copyright (C) 1991-2022 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
This program is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU General Public License
|
||
|
|
as published by the Free Software Foundation; either version 2
|
||
|
|
of the License, or (at your option) any later version.
|
||
|
|
|
||
|
|
This program 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 General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with this program; if not, see <https://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <errno.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <sys/socket.h>
|
||
|
|
#include <sys/un.h>
|
||
|
|
|
||
|
|
int
|
||
|
|
make_named_socket (const char *filename)
|
||
|
|
{
|
||
|
|
struct sockaddr_un name;
|
||
|
|
int sock;
|
||
|
|
size_t size;
|
||
|
|
|
||
|
|
/* Create the socket. */
|
||
|
|
sock = socket (PF_LOCAL, SOCK_DGRAM, 0);
|
||
|
|
if (sock < 0)
|
||
|
|
{
|
||
|
|
perror ("socket");
|
||
|
|
exit (EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Bind a name to the socket. */
|
||
|
|
name.sun_family = AF_LOCAL;
|
||
|
|
strncpy (name.sun_path, filename, sizeof (name.sun_path));
|
||
|
|
name.sun_path[sizeof (name.sun_path) - 1] = '\0';
|
||
|
|
|
||
|
|
/* The size of the address is
|
||
|
|
the offset of the start of the filename,
|
||
|
|
plus its length (not including the terminating null byte).
|
||
|
|
Alternatively you can just do:
|
||
|
|
size = SUN_LEN (&name);
|
||
|
|
*/
|
||
|
|
size = (offsetof (struct sockaddr_un, sun_path)
|
||
|
|
+ strlen (name.sun_path));
|
||
|
|
|
||
|
|
if (bind (sock, (struct sockaddr *) &name, size) < 0)
|
||
|
|
{
|
||
|
|
perror ("bind");
|
||
|
|
exit (EXIT_FAILURE);
|
||
|
|
}
|
||
|
|
|
||
|
|
return sock;
|
||
|
|
}
|