1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)gethostid.c 5.2 (Berkeley) 05/24/93"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/param.h> 13 #include <sys/sysctl.h> 14 15 #if __STDC__ 16 long 17 gethostid(void) 18 #else 19 long 20 gethostid() 21 #endif 22 { 23 int mib[2]; 24 size_t size; 25 long value; 26 27 mib[0] = CTL_KERN; 28 mib[1] = KERN_HOSTID; 29 size = sizeof value; 30 if (sysctl(mib, 2, &value, &size, NULL, 0) == -1) 31 return (-1); 32 return (value); 33 } 34