| /* Example of Local-Namespace Sockets |
| Copyright (C) 1991-2014 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, if not, see <http://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; |
| } |