\" Copyright (c) 1986 Regents of the University of California.
\" All rights reserved. The Berkeley software License Agreement
\" specifies the terms and conditions for redistribution.
\"
\" @(#)ustreamread.c 6.3 (Berkeley) 5/8/86
\"
#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);
}
