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 42int 43main(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