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ras3.c revision 1.5 
      1 /* $NetBSD: ras3.c,v 1.5 2004/01/18 16:47:06 martin Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by the NetBSD
     18  *      Foundation, Inc. and its contributors.
     19  * 4. Neither the name of The NetBSD Foundation nor the names of its
     20  *    contributors may be used to endorse or promote products derived
     21  *    from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33  * POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 #include <errno.h>
     37 #include <stdio.h>
     38 #include <signal.h>
     39 #include <unistd.h>
     40 #include <sys/ras.h>
     41 #include <sys/time.h>
     42 #include <sys/wait.h>
     43 
     44 #define COUNT	10
     45 
     46 __volatile int handled = 0;
     47 __volatile int count = 0;
     48 struct itimerval itv;
     49 
     50 void handler(int);
     51 
     52 void
     53 handler(int sig)
     54 {
     55 
     56 	handled++;
     57 }
     58 
     59 int
     60 main(int argc, char *argv[])
     61 {
     62 	int rv;
     63 	char *const args[] = { argv[0], "1", NULL };
     64 
     65         signal(SIGVTALRM, handler);
     66 
     67         itv.it_interval.tv_sec = 0;
     68         itv.it_interval.tv_usec = 0;
     69         itv.it_value.tv_sec = 10;
     70         itv.it_value.tv_usec = 0;
     71         setitimer(ITIMER_VIRTUAL, &itv, NULL);
     72 
     73 	if (argc != 2) {
     74 		if (rasctl((caddr_t)&&start, (caddr_t)&&end - (caddr_t)&&start,
     75 		    RAS_INSTALL) < 0) {
     76 			if (errno == EOPNOTSUPP) {
     77 				printf("RAS is not supported on this "
     78 				    "architecture\n");
     79 				return 0;
     80 			}
     81 			return (1);
     82 		}
     83 		if (fork() != 0) {
     84 			wait(&rv);
     85 			return (rv == 0);
     86 		}
     87 		if (execvp(argv[0],args) < 0) {
     88 			printf("exec failed\n");
     89 			return (0);
     90 		}
     91 	}
     92 
     93 	__insn_barrier();
     94 start:
     95 	count++;
     96 	if (count > COUNT)
     97 		goto end;
     98 
     99 	while (!handled) {
    100 		continue;
    101 	}
    102 end:
    103 	__insn_barrier();
    104 
    105 	return (handled != 0);
    106 }
    107