102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
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/* $NetBSD: h_netget.c,v 1.2 2012/04/17 09:23:21 jruoho Exp $ */
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/*-
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* Copyright (c) 2011 Antti Kantee. 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 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 OR
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* 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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/*
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* simple utility to fetch a webpage. we wouldn't need this
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* if we had something like netcat in base
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: h_netget.c,v 1.2 2012/04/17 09:23:21 jruoho Exp $");
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <err.h>
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#include <fcntl.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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#define GETSTR "GET / HTTP/1.0\n\n"
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int
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main(int argc, char *argv[])
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{
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char buf[8192];
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struct sockaddr_in sin;
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ssize_t n;
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int s, fd;
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setprogname(argv[0]);
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if (argc != 4) {
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fprintf(stderr, "usage: %s address port savefile\n",
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getprogname());
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return EXIT_FAILURE;
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}
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s = socket(PF_INET, SOCK_STREAM, 0);
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if (s == -1)
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err(EXIT_FAILURE, "socket");
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memset(&sin, 0, sizeof(sin));
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sin.sin_len = sizeof(sin);
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sin.sin_family = AF_INET;
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sin.sin_port = htons(atoi(argv[2]));
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sin.sin_addr.s_addr = inet_addr(argv[1]);
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fd = open(argv[3], O_CREAT | O_RDWR, 0644);
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if (fd == -1)
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err(EXIT_FAILURE, "open");
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if (ftruncate(fd, 0) == -1)
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err(EXIT_FAILURE, "ftruncate savefile");
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if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) == -1)
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err(EXIT_FAILURE, "connect");
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if (write(s, GETSTR, strlen(GETSTR)) != strlen(GETSTR))
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err(EXIT_FAILURE, "socket write");
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for (;;) {
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n = read(s, buf, sizeof(buf));
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if (n == 0)
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break;
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if (n == -1)
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err(EXIT_FAILURE, "socket read");
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if (write(fd, buf, n) != n)
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err(EXIT_FAILURE, "write file");
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}
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return EXIT_SUCCESS;
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}
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