1/*      $NetBSD$	*/
2
3/*-
4 * Copyright (c) 2011 Antti Kantee.  All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28/*
29 * simple utility to fetch a webpage.  we wouldn't need this
30 * if we had something like netcat in base
31 */
32
33#include <sys/cdefs.h>
34__RCSID("$NetBSD$");
35
36#include <sys/types.h>
37#include <sys/socket.h>
38
39#include <arpa/inet.h>
40
41#include <netinet/in.h>
42
43#include <err.h>
44#include <fcntl.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <unistd.h>
49
50#define GETSTR "GET / HTTP/1.0\n\n"
51
52int
53main(int argc, char *argv[])
54{
55	char buf[8192];
56	struct sockaddr_in sin;
57	ssize_t n;
58	int s, fd;
59
60	setprogname(argv[0]);
61	if (argc != 4) {
62		fprintf(stderr, "usage: %s address port savefile\n",
63		    getprogname());
64		exit(1);
65	}
66
67	s = socket(PF_INET, SOCK_STREAM, 0);
68	if (s == -1)
69		err(1, "socket");
70
71	memset(&sin, 0, sizeof(sin));
72	sin.sin_len = sizeof(sin);
73	sin.sin_family = AF_INET;
74	sin.sin_port = htons(atoi(argv[2]));
75	sin.sin_addr.s_addr = inet_addr(argv[1]);
76
77	fd = open(argv[3], O_CREAT | O_RDWR, 0644);
78	if (fd == -1)
79		err(1, "open");
80	if (ftruncate(fd, 0) == -1)
81		err(1, "ftruncate savefile");
82
83	if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) == -1)
84		err(1, "connect");
85
86	if (write(s, GETSTR, strlen(GETSTR)) != strlen(GETSTR))
87		err(1, "socket write");
88
89	for (;;) {
90		n = read(s, buf, sizeof(buf));
91		if (n == 0)
92			break;
93		if (n == -1)
94			err(1, "socket read");
95
96		if (write(fd, buf, n) != n)
97			err(1, "write file");
98	}
99
100	exit(0);
101}
102