initial import of NetBSD tree

3 files changed, 258 insertions, 0 deletions

diff --git a/sbin/mount_kernfs/Makefile b/sbin/mount_kernfs/Makefile
new file mode 100644
index 00000000000..f339cdea41c
--- /dev/null
+++ b/sbin/mount_kernfs/Makefile
@@ -0,0 +1,12 @@
+#	$NetBSD: Makefile,v 1.6 1995/03/18 14:57:23 cgd Exp $
+#	@(#)Makefile	8.2 (Berkeley) 3/27/94
+
+PROG=	mount_kernfs
+SRCS=	mount_kernfs.c getmntopts.c
+MAN=	mount_kernfs.8
+
+MOUNT=	${.CURDIR}/../mount
+CFLAGS+= -I${MOUNT}
+.PATH:	${MOUNT}
+
+.include <bsd.prog.mk>
diff --git a/sbin/mount_kernfs/mount_kernfs.8 b/sbin/mount_kernfs/mount_kernfs.8
new file mode 100644
index 00000000000..034ab184bb1
--- /dev/null
+++ b/sbin/mount_kernfs/mount_kernfs.8
@@ -0,0 +1,140 @@
+.\"	$NetBSD: mount_kernfs.8,v 1.6 1995/03/18 14:57:24 cgd Exp $
+.\"
+.\" Copyright (c) 1992, 1993, 1994
+.\"	The Regents of the University of California.  All rights reserved.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software donated to Berkeley by
+.\" Jan-Simon Pendry.
+.\"
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+.\"
+.\"	@(#)mount_kernfs.8	8.2 (Berkeley) 3/27/94
+.\"
+.Dd March 27, 1994
+.Dt MOUNT_KERNFS 8
+.Os BSD 4.4
+.Sh NAME
+.Nm mount_kernfs
+.Nd mount the /kern file system
+.Sh SYNOPSIS
+.Nm mount_kernfs
+.Op Fl o Ar options
+.Ar /kern
+.Ar mount_point
+.Sh DESCRIPTION
+The
+.Nm mount_kern
+command attaches an instance of the kernel parameter
+namespace to the global filesystem namespace.
+The conventional mount point is
+.Pa /kern .
+This command is normally executed by
+.Xr mount 8
+at boot time.
+.Pp
+The filesystem includes several regular files which can be read,
+some of which can also be written.
+The contents of the files is in a machine-independent format,
+either a string, or an integer in decimal ASCII.
+Where numbers are returned, a trailing newline character is also added.
+.Pp
+The options are as follows:
+.Bl -tag -width indent
+.It Fl o
+Options are specified with a
+.Fl o
+flag followed by a comma separated string of options.
+See the
+.Xr mount 8
+man page for possible options and their meanings.
+.El
+.Sh FILES
+.Bl -tag -width copyright -compact
+.It Pa boottime
+the time at which the system was last booted (decimal ASCII).
+.It Pa copyright
+kernel copyright message.
+.It Pa hostname
+the hostname, with a trailing newline.
+The hostname can be changed by writing to this file.
+A trailing newline will be stripped from the hostname being written.
+.It Pa hz
+the frequency of the system clock (decimal ASCII).
+.It Pa loadavg
+the 1, 5 and 15 minute load average in kernel fixed-point format.
+The final integer is the fix-point scaling factor.
+All numbers are in decimal ASCII.
+.It Pa msgbuf
+the kernel message buffer, also read by
+.Xr syslogd 8 ,
+through the
+.Pa log
+device, and by
+.Xr dmesg 8 .
+.It Pa pagesize
+the machine pagesize (decimal ASCII).
+.It Pa physmem
+the number of pages of physical memory in the machine (decimal ASCII).
+.\" .It Pa root
+.\" the system root directory.
+.\" In a chroot'ed environment,
+.\" .Nm
+.\" can be used to create a new
+.\" .Pa /kern
+.\" mount point.
+.\" .Pa /kern/root
+.\" will then refer to the system global root, not the current process root.
+.It Pa rootdev
+the root device.
+.It Pa rrootdev
+the raw root device.
+.It Pa time
+the second and microsecond value of the system clock.
+Both numbers are in decimal ASCII.
+.It Pa version
+the kernel version string.
+The head line for
+.Pa /etc/motd
+can be generated by running:
+.Dq Ic "sed 1q /kern/version"
+.El
+.Sh SEE ALSO
+.Xr mount 2 ,
+.Xr unmount 2 ,
+.Xr fstab 5 ,
+.Xr dmesg 8 ,
+.Xr mount 8 ,
+.Xr syslogd 8
+.Sh CAVEATS
+This filesystem may not be NFS-exported.
+.Sh HISTORY
+The
+.Nm mount_kernfs
+utility first appeared in 4.4BSD.
diff --git a/sbin/mount_kernfs/mount_kernfs.c b/sbin/mount_kernfs/mount_kernfs.c
new file mode 100644
index 00000000000..84f141b9d17
--- /dev/null
+++ b/sbin/mount_kernfs/mount_kernfs.c
@@ -0,0 +1,106 @@
+/*	$NetBSD: mount_kernfs.c,v 1.6 1995/03/18 14:57:27 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1990, 1992 Jan-Simon Pendry
+ * Copyright (c) 1992, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry.
+ *
+ * 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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+#ifndef lint
+char copyright[] =
+"@(#) Copyright (c) 1992, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)mount_kernfs.c	8.2 (Berkeley) 3/27/94";
+#else
+static char rcsid[] = "$NetBSD: mount_kernfs.c,v 1.6 1995/03/18 14:57:27 cgd Exp $";
+#endif
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/mount.h>
+
+#include <err.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "mntopts.h"
+
+struct mntopt mopts[] = {
+	MOPT_STDOPTS,
+	{ NULL }
+};
+
+void	usage __P((void));
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	int ch, mntflags;
+
+	mntflags = 0;
+	while ((ch = getopt(argc, argv, "o:")) != EOF)
+		switch (ch) {
+		case 'o':
+			getmntopts(optarg, mopts, &mntflags);
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 2)
+		usage();
+
+	if (mount(MOUNT_KERNFS, argv[1], mntflags, NULL))
+		err(1, NULL);
+	exit(0);
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr,
+		"usage: mount_kernfs [-o options] /kern mount_point\n");
+	exit(1);
+}