149 lines
3.9 KiB
C
149 lines
3.9 KiB
C
/*-
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* Copyright (c) 2001 Jonathan Lemon <jlemon@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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static void __dead2
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usage(void)
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{
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(void)fprintf(stderr, "%s\n%s\n%s\n",
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"usage: conscontrol [list]",
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" conscontrol mute on | off",
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" conscontrol add | delete console");
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exit(1);
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}
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static void
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consstatus(void)
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{
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int mute;
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size_t len;
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char *buf, *p, *avail;
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len = sizeof(mute);
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if (sysctlbyname("kern.consmute", &mute, &len, NULL, 0) == -1)
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err(1, "kern.consmute retrieval failed");
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if (sysctlbyname("kern.console", NULL, &len, NULL, 0) == -1)
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err(1, "kern.console estimate failed");
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if ((buf = malloc(len)) == NULL)
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errx(1, "kern.console malloc failed");
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if (sysctlbyname("kern.console", buf, &len, NULL, 0) == -1)
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err(1, "kern.console retrieval failed");
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if ((avail = strchr(buf, '/')) == NULL)
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errx(1, "kern.console format not understood");
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p = avail;
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*avail++ = '\0';
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if (p != buf)
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*--p = '\0'; /* remove trailing ',' */
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p = avail + strlen(avail);
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if (p != avail)
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*--p = '\0'; /* remove trailing ',' */
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printf("Configured: %s\n", buf);
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printf(" Available: %s\n", avail);
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printf(" Muting: %s\n", mute ? "on" : "off");
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free(buf);
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}
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static void
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consmute(const char *onoff)
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{
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int mute;
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size_t len;
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if (strcmp(onoff, "on") == 0)
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mute = 1;
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else if (strcmp(onoff, "off") == 0)
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mute = 0;
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else
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usage();
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len = sizeof(mute);
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if (sysctlbyname("kern.consmute", NULL, NULL, &mute, len) == -1)
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err(1, "could not change console muting");
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}
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static void
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consadd(char *devnam)
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{
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size_t len;
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len = strlen(devnam);
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if (sysctlbyname("kern.console", NULL, NULL, devnam, len) == -1)
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err(1, "could not add %s as a console", devnam);
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}
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static void
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consdel(const char *devnam)
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{
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char *buf;
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size_t len;
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len = strlen(devnam) + sizeof("-");
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if ((buf = malloc(len)) == NULL)
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errx(1, "malloc failed");
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buf[0] = '-';
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strcpy(buf + 1, devnam);
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if (sysctlbyname("kern.console", NULL, NULL, buf, len) == -1)
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err(1, "could not remove %s as a console", devnam);
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free(buf);
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}
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int
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main(int argc, char **argv)
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{
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if (getopt(argc, argv, "") != -1)
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usage();
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argc -= optind;
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argv += optind;
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if (argc > 0 && strcmp(argv[0], "list") != 0) {
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if (argc != 2)
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usage();
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if (strcmp(argv[0], "mute") == 0)
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consmute(argv[1]);
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else if (strcmp(argv[0], "add") == 0)
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consadd(argv[1]);
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else if (strcmp(argv[0], "delete") == 0)
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consdel(argv[1]);
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else
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usage();
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}
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consstatus();
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exit(0);
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}
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