1 /* 2 * Copyright (c) 1995 3 * Mark Murray. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY MARK MURRAY AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: src/usr.sbin/rndcontrol/rndcontrol.c,v 1.11.2.1 2000/05/10 02:04:44 obrien Exp $ 27 * $DragonFly: src/usr.sbin/rndcontrol/rndcontrol.c,v 1.2 2003/06/17 04:30:02 dillon Exp $ 28 */ 29 30 #include <sys/random.h> 31 #include <err.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 #include <unistd.h> 35 #include <fcntl.h> 36 #include <sys/ioctl.h> 37 38 static void 39 usage() 40 { 41 fprintf(stderr, "usage: rndcontrol [-q] [-s irq_no] [-c irq_no]\n"); 42 exit(1); 43 } 44 45 int 46 main(int argc, char *argv[]) 47 { 48 int verbose, ch, fd, result, i; 49 u_int16_t irq; 50 51 verbose = 1; 52 53 fd = open("/dev/random", O_RDONLY, 0); 54 if (fd == -1) { 55 warn("/dev/random"); 56 return (1); 57 } 58 else { 59 while ((ch = getopt(argc, argv, "qs:c:")) != -1) 60 switch (ch) { 61 case 'q': 62 verbose = 0; 63 break; 64 case 's': 65 irq = (u_int16_t)atoi(optarg); 66 if (verbose) 67 printf("%s: setting irq %d\n", argv[0], irq); 68 result = ioctl(fd, MEM_SETIRQ, (char *)&irq); 69 if (result == -1) { 70 warn("%s", argv[0]); 71 return (1); 72 } 73 break; 74 case 'c': 75 irq = (u_int16_t)atoi(optarg); 76 if (verbose) 77 printf("%s: clearing irq %d\n", argv[0], irq); 78 result = ioctl(fd, MEM_CLEARIRQ, (char *)&irq); 79 if (result == -1) { 80 warn("%s", argv[0]); 81 return (1); 82 } 83 break; 84 case '?': 85 default: 86 usage(); 87 } 88 } 89 if (verbose) { 90 result = ioctl(fd, MEM_RETURNIRQ, (char *)&irq); 91 if (result == -1) { 92 warn("%s", argv[0]); 93 return (1); 94 } 95 printf("%s: interrupts in use:", argv[0]); 96 for (i = 0; i < 16; i++) 97 if (irq & (1 << i)) 98 printf(" %d", i); 99 printf("\n"); 100 } 101 argc -= optind; 102 argv += optind; 103 104 if (argc) { 105 fprintf(stderr, "%s: unknown argument(s): ", argv[-optind]); 106 for (i = 0; i < argc; i++) 107 fprintf(stderr, " %s", argv[i]); 108 fprintf(stderr, "\n"); 109 } 110 111 return 0; 112 } 113