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Diffstat (limited to 'share/doc/psd/20.ipctut/streamread.c')
| -rw-r--r-- | share/doc/psd/20.ipctut/streamread.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/share/doc/psd/20.ipctut/streamread.c b/share/doc/psd/20.ipctut/streamread.c new file mode 100644 index 000000000000..ffad802f63e0 --- /dev/null +++ b/share/doc/psd/20.ipctut/streamread.c @@ -0,0 +1,102 @@ +.\" 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. +.\" +.\" @(#)streamread.c 8.1 (Berkeley) 6/8/93 +.\" +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <netdb.h> +#include <stdio.h> +#define TRUE 1 + +/* + * This program creates a socket and then begins an infinite 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, length; + struct sockaddr_in server; + int msgsock; + char buf[1024]; + int rval; + int i; + + /* Create socket */ + sock = socket(AF_INET, SOCK_STREAM, 0); + if (sock < 0) { + perror("opening stream socket"); + exit(1); + } + /* Name socket using wildcards */ + server.sin_family = AF_INET; + server.sin_addr.s_addr = INADDR_ANY; + server.sin_port = 0; + if (bind(sock, &server, sizeof(server))) { + perror("binding stream socket"); + exit(1); + } + /* Find out assigned port number and print it out */ + length = sizeof(server); + if (getsockname(sock, &server, &length)) { + perror("getting socket name"); + exit(1); + } + printf("Socket has port #%d\en", ntohs(server.sin_port)); + + /* Start accepting connections */ + listen(sock, 5); + do { + 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"); + i = 0; + if (rval == 0) + printf("Ending connection\en"); + else + printf("-->%s\en", buf); + } while (rval != 0); + close(msgsock); + } while (TRUE); + /* + * Since this program has an infinite loop, the socket "sock" is + * never explicitly closed. However, all sockets will be closed + * automatically when a process is killed or terminates normally. + */ +} |