rexec.c revision 1.2 
1/*	$NetBSD: rexec.c,v 1.2 2005/02/27 01:34:07 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2005 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38#include <sys/cdefs.h>
39__RCSID("$NetBSD: rexec.c,v 1.2 2005/02/27 01:34:07 christos Exp $");
40
41#include <stdio.h>
42#include <netdb.h>
43#include <stdlib.h>
44#include <unistd.h>
45#include <err.h>
46
47static void usage(void) __attribute__((__noreturn__));
48/*XXX*/
49int rexec(char **, int, char *, char *, char *, int *);
50
51int
52main(int argc, char **argv)
53{
54	int c, s;
55	ssize_t nr;
56	struct servent *sv;
57	char *host = __UNCONST("localhost");
58	char *user = __UNCONST("root");
59	char *pass = __UNCONST("h@x0R");
60	char *cmd  = __UNCONST("ls");
61	char line[BUFSIZ];
62
63	while ((c = getopt(argc, argv, "h:u:p:c:")) != -1)
64		switch (c) {
65		case 'h':
66			host = optarg;
67			break;
68		case 'u':
69			user = optarg;
70			break;
71		case 'p':
72			pass = optarg;
73			break;
74		case 'c':
75			cmd = optarg;
76			break;
77		default:
78			usage();
79		}
80
81	if ((sv = getservbyname("exec", "tcp")) == NULL)
82		errx(1, "Cannot find service exec/tcp");
83
84	if ((s = rexec(&host, sv->s_port, user, pass, cmd, NULL)) == -1)
85		return 1;
86	while ((nr = read(s, line, sizeof(line))) > 0)
87		(void)write(STDOUT_FILENO, line, nr);
88	if (nr == -1)
89		err(1, "read failed");
90	return 0;
91}
92
93static void
94usage(void)
95{
96	(void)fprintf(stderr, "Usage: %s [-u <user>] [-p <password>]"
97	    "[-h <hostname>] [-c <cmd>]\n", getprogname());
98	exit(1);
99}
100