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 1.4 2005/12/05 02:40:28 swildner 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 <errno.h> 37 #include <sys/ioctl.h> 38 39 static void 40 usage(void) 41 { 42 fprintf(stderr, "usage: rndcontrol [-q] [-s irq_no] [-c irq_no]\n"); 43 exit(1); 44 } 45 46 int 47 main(int argc, char *argv[]) 48 { 49 int verbose, ch, fd, result, i; 50 u_int16_t irq; 51 52 verbose = 1; 53 54 fd = open("/dev/random", O_RDONLY, 0); 55 if (fd == -1) { 56 warn("/dev/random"); 57 return (1); 58 } 59 else { 60 while ((ch = getopt(argc, argv, "qs:c:")) != -1) 61 switch (ch) { 62 case 'q': 63 verbose = 0; 64 break; 65 case 's': 66 irq = (u_int16_t)atoi(optarg); 67 if (verbose) 68 printf("%s: setting irq %d\n", argv[0], irq); 69 result = ioctl(fd, MEM_SETIRQ, (char *)&irq); 70 if (result == -1) { 71 warn("%s", argv[0]); 72 return (1); 73 } 74 break; 75 case 'c': 76 irq = (u_int16_t)atoi(optarg); 77 if (verbose) 78 printf("%s: clearing irq %d\n", argv[0], irq); 79 result = ioctl(fd, MEM_CLEARIRQ, (char *)&irq); 80 if (result == -1) { 81 warn("%s", argv[0]); 82 return (1); 83 } 84 break; 85 case '?': 86 default: 87 usage(); 88 } 89 } 90 if (verbose) { 91 printf("%s: interrupts in use:", argv[0]); 92 irq = 0; 93 for (;;) { 94 result = ioctl(fd, MEM_FINDIRQ, (char *)&irq); 95 if (result < 0) 96 break; 97 printf(" %d", irq); 98 ++irq; 99 } 100 if (result < 0 && errno == ENOTSUP) { 101 printf(" unknown"); 102 } 103 printf("\n"); 104 } 105 argc -= optind; 106 argv += optind; 107 108 if (argc) { 109 fprintf(stderr, "%s: unknown argument(s): ", argv[-optind]); 110 for (i = 0; i < argc; i++) 111 fprintf(stderr, " %s", argv[i]); 112 fprintf(stderr, "\n"); 113 } 114 115 return 0; 116 } 117