151 lines
3.7 KiB
C
151 lines
3.7 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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* $FreeBSD$
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*/
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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 <sys/types.h>
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#include <sys/sysctl.h>
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static void __dead2
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usage(void)
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{
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const char *pname = getprogname();
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fprintf(stderr, "usage: %s [list]\n", pname);
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fprintf(stderr, " %s mute on|off\n", pname);
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fprintf(stderr, " %s add|delete console\n", pname);
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exit(1);
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}
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#define CONSBUFSIZE 32
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static void
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constatus(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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goto fail;
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len = 0;
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alloc:
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len += CONSBUFSIZE;
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buf = malloc(len);
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if (buf == NULL)
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err(1, "Could not malloc sysctl buffer");
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if (sysctlbyname("kern.console", buf, &len, NULL, 0) == -1) {
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if (errno == ENOMEM) {
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free(buf);
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goto alloc;
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}
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goto fail;
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}
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avail = strchr(buf, '/');
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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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return;
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fail:
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err(1, "Could not get console information");
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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 *devname)
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{
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size_t len;
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len = strlen(devname);
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if (sysctlbyname("kern.console", NULL, NULL, devname, len) == -1)
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err(1, "Could not add %s as a console", devname);
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}
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#define MAXDEVNAME 32
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static void
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consdel(const char *devname)
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{
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char buf[MAXDEVNAME];
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size_t len;
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snprintf(buf, MAXDEVNAME, "-%s", devname);
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len = strlen(buf);
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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", devname);
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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 (argc < 2 || strcmp(argv[1], "list") == 0)
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goto done;
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if (argc < 3)
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usage();
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if (strcmp(argv[1], "mute") == 0)
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consmute(argv[2]);
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else if (strcmp(argv[1], "add") == 0)
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consadd(argv[2]);
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else if (strcmp(argv[1], "delete") == 0)
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consdel(argv[2]);
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else
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usage();
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done:
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constatus();
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}
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