Add conscontrol, a front end interface for manipulating consoles.

sbin/conscontrol/Makefile

@@ -0,0 +1,7 @@
+# $FreeBSD$
+
+PROG=	conscontrol
+MAN=	conscontrol.8
+NOMAN=1
+
+.include <bsd.prog.mk>

sbin/conscontrol/conscontrol.c

@@ -0,0 +1,150 @@
+/*-
+ * Copyright (c) 2001 Jonathan Lemon <jlemon@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/sysctl.h>
+
+static void __dead2
+usage(void)
+{
+	const char *pname = getprogname();
+
+	fprintf(stderr, "usage: %s [list]\n", pname);
+	fprintf(stderr, "       %s mute on|off\n", pname);
+	fprintf(stderr, "       %s add|delete console\n", pname);
+	exit(1);
+}
+
+#define CONSBUFSIZE	32
+
+static void
+constatus(void)
+{
+	int mute;
+	size_t len;
+	char *buf, *p, *avail;
+
+	len = sizeof(mute);
+	if (sysctlbyname("kern.consmute", &mute, &len, NULL, 0) == -1)
+		goto fail;
+
+	len = 0;
+alloc:
+	len += CONSBUFSIZE;
+	buf = malloc(len);
+	if (buf == NULL)
+		err(1, "Could not malloc sysctl buffer");
+
+	if (sysctlbyname("kern.console", buf, &len, NULL, 0) == -1) {
+		if (errno == ENOMEM) {
+			free(buf);
+			goto alloc;
+		}
+		goto fail;
+	}
+	avail = strchr(buf, '/');
+	p = avail;
+	*avail++ = '\0';
+	if (p != buf)
+		*--p = '\0';			/* remove trailing ',' */
+	p = avail + strlen(avail);
+	if (p != avail)
+		*--p = '\0';			/* remove trailing ',' */
+	printf("Configured: %s\n", buf);
+	printf(" Available: %s\n", avail);
+	printf("    Muting: %s\n", mute ? "on" : "off");
+	free(buf);
+	return;
+fail:
+	err(1, "Could not get console information");
+}
+
+static void
+consmute(const char *onoff)
+{
+	int mute;
+	size_t len;
+
+	if (strcmp(onoff, "on") == 0)
+		mute = 1;
+	else if (strcmp(onoff, "off") == 0)
+		mute = 0;
+	else
+		usage();
+	len = sizeof(mute);
+	if (sysctlbyname("kern.consmute", NULL, NULL, &mute, len) == -1)
+		err(1, "Could not change console muting");
+}
+
+static void
+consadd(char *devname)
+{
+	size_t len;
+
+	len = strlen(devname);
+	if (sysctlbyname("kern.console", NULL, NULL, devname, len) == -1)
+		err(1, "Could not add %s as a console", devname);
+}
+
+#define MAXDEVNAME	32
+
+static void
+consdel(const char *devname)
+{
+	char buf[MAXDEVNAME];
+	size_t len;
+
+	snprintf(buf, MAXDEVNAME, "-%s", devname);
+	len = strlen(buf);
+	if (sysctlbyname("kern.console", NULL, NULL, &buf, len) == -1)
+		err(1, "Could not remove %s as a console", devname);
+}
+
+int
+main(int argc, char **argv)
+{
+
+	if (argc < 2 || strcmp(argv[1], "list") == 0)
+		goto done;
+	if (argc < 3)
+		usage();
+	if (strcmp(argv[1], "mute") == 0)
+		consmute(argv[2]);
+	else if (strcmp(argv[1], "add") == 0)
+		consadd(argv[2]);
+	else if (strcmp(argv[1], "delete") == 0)
+		consdel(argv[2]);
+	else
+		usage();
+done:
+	constatus();
+}