84 lines
2.8 KiB
C
84 lines
2.8 KiB
C
/* This file is part of the sample code and exercises
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* used by the class "Advanced Programming in the UNIX
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* Environment" taught by Jan Schaumann
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* <jschauma@netmeister.org> at Stevens Institute of
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* Technology.
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*
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* https://stevens.netmeister.org/631/
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*/
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/* $NetBSD: udgramsend.c,v 1.3 2003/08/07 10:30:50 agc Exp $
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*
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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. 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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* @(#)udgramsend.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 <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/* 'Dover Beach' by Matthew Arnold -- look it up. */
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#define DATA "The sea is calm tonight, the tide is full . . ."
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/*
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* Here I send a datagram to a receiver whose name I get from the command
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* line arguments. The form of the command line is udgramsend pathname
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*/
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int main(int argc, char **argv)
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{
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int sock;
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struct sockaddr_un name;
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if (argc != 2) {
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perror("usage: send <socket>");
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exit(1);
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}
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sock = socket(PF_LOCAL, SOCK_DGRAM, 0);
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if (sock < 0) {
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perror("opening datagram socket");
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exit(1);
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}
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name.sun_family = PF_LOCAL;
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(void)strncpy(name.sun_path, argv[1], sizeof(name.sun_path));
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if (sendto(sock, DATA, sizeof(DATA), 0,
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(struct sockaddr *)&name, sizeof(struct sockaddr_un)) < 0) {
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perror("sending datagram message");
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}
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close(sock);
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return 0;
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}
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