1 /* $NetBSD: rump_open_tap.c,v 1.1 2020/09/30 14:43:15 roy Exp $ */
2
3 /*
4 * Copyright (c) 2020 The NetBSD Foundation, Inc.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Roy Marples.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __RCSID("$NetBSD: rump_open_tap.c,v 1.1 2020/09/30 14:43:15 roy Exp $");
32
33 #include <err.h>
34 #include <fcntl.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <unistd.h>
38
39 #include <rump/rump_syscalls.h>
40 #include <rump/rumpclient.h>
41
42 int
main(int argc,char ** argv)43 main(int argc, char **argv)
44 {
45 int fd;
46
47 if (argc < 2)
48 errx(EXIT_FAILURE, "No path specified");
49
50 rumpclient_init();
51
52 fd = rump_sys_open(argv[1], O_RDWR);
53 if (fd == -1)
54 err(EXIT_FAILURE, "open: %s", argv[1]);
55
56 if (argc > 2) {
57 FILE *fp;
58 pid_t pid;
59
60 fp = fopen(argv[2], "w");
61 if (fp == NULL)
62 err(EXIT_FAILURE, "fopen: %s", argv[2]);
63
64 pid = fork();
65 switch (pid) {
66 case -1:
67 err(EXIT_FAILURE, "fork");
68 case 0:
69 break;
70 default:
71 fprintf(fp, "%d\n", pid);
72 exit(EXIT_SUCCESS);
73 }
74 }
75
76 /* Spin with the fd open */
77 for (;;)
78 sleep(100);
79 }
80