1 /*- 2 * Copyright (c) 2001 Jonathan Lemon <jlemon@FreeBSD.org> 3 * 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 THE AUTHOR 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 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/types.h> 31 #include <sys/sysctl.h> 32 33 #include <err.h> 34 #include <errno.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 static void __dead2 41 usage(void) 42 { 43 44 (void)fprintf(stderr, "%s\n%s\n%s\n", 45 "usage: conscontrol [list]", 46 " conscontrol mute on | off", 47 " conscontrol add | delete console"); 48 exit(1); 49 } 50 51 static void 52 consstatus(void) 53 { 54 int mute; 55 size_t len; 56 char *buf, *p, *avail; 57 58 len = sizeof(mute); 59 if (sysctlbyname("kern.consmute", &mute, &len, NULL, 0) == -1) 60 err(1, "kern.consmute retrieval failed"); 61 if (sysctlbyname("kern.console", NULL, &len, NULL, 0) == -1) 62 err(1, "kern.console estimate failed"); 63 if ((buf = malloc(len)) == NULL) 64 errx(1, "kern.console malloc failed"); 65 if (sysctlbyname("kern.console", buf, &len, NULL, 0) == -1) 66 err(1, "kern.console retrieval failed"); 67 if ((avail = strchr(buf, '/')) == NULL) 68 errx(1, "kern.console format not understood"); 69 p = avail; 70 *avail++ = '\0'; 71 if (p != buf) 72 *--p = '\0'; /* remove trailing ',' */ 73 p = avail + strlen(avail); 74 if (p != avail) 75 *--p = '\0'; /* remove trailing ',' */ 76 printf("Configured: %s\n", buf); 77 printf(" Available: %s\n", avail); 78 printf(" Muting: %s\n", mute ? "on" : "off"); 79 free(buf); 80 } 81 82 static void 83 consmute(const char *onoff) 84 { 85 int mute; 86 size_t len; 87 88 if (strcmp(onoff, "on") == 0) 89 mute = 1; 90 else if (strcmp(onoff, "off") == 0) 91 mute = 0; 92 else 93 usage(); 94 len = sizeof(mute); 95 if (sysctlbyname("kern.consmute", NULL, NULL, &mute, len) == -1) 96 err(1, "could not change console muting"); 97 } 98 99 static void 100 consadd(char *devnam) 101 { 102 size_t len; 103 104 len = strlen(devnam); 105 if (sysctlbyname("kern.console", NULL, NULL, devnam, len) == -1) 106 err(1, "could not add %s as a console", devnam); 107 } 108 109 static void 110 consdel(const char *devnam) 111 { 112 char *buf; 113 size_t len; 114 115 len = strlen(devnam) + sizeof("-"); 116 if ((buf = malloc(len)) == NULL) 117 errx(1, "malloc failed"); 118 buf[0] = '-'; 119 strcpy(buf + 1, devnam); 120 if (sysctlbyname("kern.console", NULL, NULL, buf, len) == -1) 121 err(1, "could not remove %s as a console", devnam); 122 free(buf); 123 } 124 125 int 126 main(int argc, char **argv) 127 { 128 129 if (getopt(argc, argv, "") != -1) 130 usage(); 131 argc -= optind; 132 argv += optind; 133 134 if (argc > 0 && strcmp(argv[0], "list") != 0) { 135 if (argc != 2) 136 usage(); 137 if (strcmp(argv[0], "mute") == 0) 138 consmute(argv[1]); 139 else if (strcmp(argv[0], "add") == 0) 140 consadd(argv[1]); 141 else if (strcmp(argv[0], "delete") == 0) 142 consdel(argv[1]); 143 else 144 usage(); 145 } 146 consstatus(); 147 exit(0); 148 } 149