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isqemu.h revision 1.4 
      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 #if defined(__i386__) || defined(__x86_64__)
     45 	char name[1024];
     46 	size_t len = sizeof(name);
     47 
     48 	if (sysctlbyname("machdep.cpu_brand", name, &len, NULL, 0) == -1) {
     49 		if (errno == ENOENT)
     50 			return false;
     51 		err(EXIT_FAILURE, "sysctl");
     52 	}
     53 	return strstr(name, "QEMU") != NULL;
     54 #else
     55 	return false;
     56 #endif
     57 }
     58 
     59 #ifdef TEST
     60 int
     61 main(void) {
     62 	return isQEMU();
     63 }
     64 #endif
     65