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