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
isQEMU(void)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
main(void)86 main(void) {
87 return isQEMU();
88 }
89 #endif
90