1 /* $NetBSD: isqemu.h,v 1.4 2015/01/03 14:21:05 gson Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 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. Neither the name of The NetBSD Foundation nor the names of its 19 * contributors may be used to endorse or promote products derived 20 * from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 #include <sys/param.h> 35 #include <sys/sysctl.h> 36 #include <stdbool.h> 37 #include <stdlib.h> 38 #include <string.h> 39 #include <errno.h> 40 #include <err.h> 41 42 static __inline bool 43 isQEMU(void) { 44 #ifdef __FreeBSD__ 45 char *vm_guest_name_buf; 46 size_t len; 47 bool is_vm; 48 49 if (sysctlbyname("kern.vm_guest", NULL, &len, NULL, 0) == -1) 50 err(EXIT_FAILURE, "sysctl"); 51 52 if ((vm_guest_name_buf = malloc(len)) == NULL) 53 err(EXIT_FAILURE, "malloc"); 54 55 if (sysctlbyname("kern.vm_guest", vm_guest_name_buf, &len, NULL, 0) 56 == -1) 57 err(EXIT_FAILURE, "sysctl"); 58 59 if (strcmp(vm_guest_name_buf, "none") == 0) 60 is_vm = false; 61 else 62 is_vm = true; 63 64 free(vm_guest_name_buf); 65 66 return is_vm; 67 #else 68 #if defined(__i386__) || defined(__x86_64__) 69 char name[1024]; 70 size_t len = sizeof(name); 71 72 if (sysctlbyname("machdep.cpu_brand", name, &len, NULL, 0) == -1) { 73 if (errno == ENOENT) 74 return false; 75 err(EXIT_FAILURE, "sysctl"); 76 } 77 return strstr(name, "QEMU") != NULL; 78 #else 79 return false; 80 #endif 81 #endif 82 } 83 84 #ifdef TEST 85 int 86 main(void) { 87 return isQEMU(); 88 } 89 #endif 90