/share/doc/psd/20.ipctut/ustreamread.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 96 lines · 74 code · 3 blank · 19 comment · 11 complexity · a9a1d5018fd58887938e5ce7d2e76d52 MD5 · raw file
- .\" Copyright (c) 1986, 1993
- .\" The Regents of the University of California. All rights reserved.
- .\"
- .\" Redistribution and use in source and binary forms, with or without
- .\" modification, are permitted provided that the following conditions
- .\" are met:
- .\" 1. Redistributions of source code must retain the above copyright
- .\" notice, this list of conditions and the following disclaimer.
- .\" 2. Redistributions in binary form must reproduce the above copyright
- .\" notice, this list of conditions and the following disclaimer in the
- .\" documentation and/or other materials provided with the distribution.
- .\" 3. All advertising materials mentioning features or use of this software
- .\" must display the following acknowledgement:
- .\" This product includes software developed by the University of
- .\" California, Berkeley and its contributors.
- .\" 4. Neither the name of the University nor the names of its contributors
- .\" may be used to endorse or promote products derived from this software
- .\" without specific prior written permission.
- .\"
- .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- .\" SUCH DAMAGE.
- .\"
- .\" @(#)ustreamread.c 8.1 (Berkeley) 6/8/93
- .\"
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <sys/un.h>
- #include <stdio.h>
- #define NAME "socket"
- /*
- * This program creates a socket in the UNIX domain and binds a name to it.
- * After printing the socket's name it begins a loop. Each time through the
- * loop it accepts a connection and prints out messages from it. When the
- * connection breaks, or a termination message comes through, the program
- * accepts a new connection.
- */
- main()
- {
- int sock, msgsock, rval;
- struct sockaddr_un server;
- char buf[1024];
- /* Create socket */
- sock = socket(AF_UNIX, SOCK_STREAM, 0);
- if (sock < 0) {
- perror("opening stream socket");
- exit(1);
- }
- /* Name socket using file system name */
- server.sun_family = AF_UNIX;
- strcpy(server.sun_path, NAME);
- if (bind(sock, &server, sizeof(struct sockaddr_un))) {
- perror("binding stream socket");
- exit(1);
- }
- printf("Socket has name %s\en", server.sun_path);
- /* Start accepting connections */
- listen(sock, 5);
- for (;;) {
- msgsock = accept(sock, 0, 0);
- if (msgsock == -1)
- perror("accept");
- else do {
- bzero(buf, sizeof(buf));
- if ((rval = read(msgsock, buf, 1024)) < 0)
- perror("reading stream message");
- else if (rval == 0)
- printf("Ending connection\en");
- else
- printf("-->%s\en", buf);
- } while (rval > 0);
- close(msgsock);
- }
- /*
- * The following statements are not executed, because they follow an
- * infinite loop. However, most ordinary programs will not run
- * forever. In the UNIX domain it is necessary to tell the file
- * system that one is through using NAME. In most programs one uses
- * the call unlink() as below. Since the user will have to kill this
- * program, it will be necessary to remove the name by a command from
- * the shell.
- */
- close(sock);
- unlink(NAME);
- }