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Diffstat (limited to 'sbin/mount_kernfs/mount_kernfs.8')
-rw-r--r-- | sbin/mount_kernfs/mount_kernfs.8 | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/sbin/mount_kernfs/mount_kernfs.8 b/sbin/mount_kernfs/mount_kernfs.8 new file mode 100644 index 0000000..787c174 --- /dev/null +++ b/sbin/mount_kernfs/mount_kernfs.8 @@ -0,0 +1,131 @@ +.\" +.\" 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 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 mount 8 +.Sh CAVEATS +This filesystem may not be NFS-exported. +.Sh HISTORY +The +.Nm mount_kernfs +utility first appeared in 4.4BSD. |