MOUNT_KERNFS(8)         OpenBSD System Manager's Manual        MOUNT_KERNFS(8)

NAME
     mount_kernfs - mount the /kern file system

SYNOPSIS
     mount_kernfs [-o options] /kern mount_point

DESCRIPTION
     The mount_kernfs command attaches an instance of the kernel parameter
     namespace to the global filesystem namespace.  The conventional mount
     point is /kern. This command is invoked by mount(8) when using the syntax

         mount [options] -t kernfs /kern mount_point

     This command is normally executed by mount(8) at boot time.

     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-in-
     dependent format, either a string, or an integer in decimal ASCII.  Where
     numbers are returned, a trailing newline character is also added.

     The options are as follows:

     -o options
             Options are specified with a -o flag followed by a comma separat-
             ed string of options.  See the mount(8) man page for possible op-
             tions and their meanings.

     Statistics reported by df(1) on the /kern filesystem will indicate the
     amount of unwired/physical memory instead of `disk space', and the number
     of vnodes used/allocated instead of `inodes'. The filesystem's block size
     is the system's page size.

FILES
     boottime   Time at which the system was last booted (decimal ASCII).
     byteorder  _BYTE_ORDER for this kernel.
     copyright  Kernel copyright message.
     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.
     domainname
                The domainname, with a trailing newline.  Behaves like a host-
                name.
     hz         Frequency of the system clock (decimal ASCII).
     ipsec      The currently configured IPSec Security Associations.
     loadavg    The 1, 5 and 15 minute load average in kernel fixed-point for-
                mat.  The final integer is the fix-point scaling factor.  All
                numbers are in decimal ASCII.
     machine    Architecture this kernel compiled for.
     model      Model of the processor this machine running on.
     msgbuf     Kernel message buffer, also read by syslogd(8), through the
                log device, and by dmesg(8).
     ncpu       Number of CPUs in this machine.
     ostype     OS type for this kernel ("OpenBSD").
     osrelease  OS release number.
     osrev      OS revision number (BSD from <sys/param.h>).
     pagesize   Machine pagesize (decimal ASCII).
     posix      _POSIX_VERSION for this kernel.
     physmem    Number of pages of physical memory in the machine (decimal
                ASCII).
     rootdev    Root device.
     rrootdev   Raw root device.
     time       Second and microsecond value of the system clock.  Both num-

                bers are in decimal ASCII.
     usermem    Number of pages of physical memory available for user process-
                es.
     version    Kernel version string.  The head line for /etc/motd can be
                generated by running: ``sed 1q /kern/version''.

SEE ALSO
     mount(2), unmount(2), fstab(5), dmesg(8), mount(8), syslogd(8)

CAVEATS
     This filesystem may not be NFS-exported.

HISTORY
     The mount_kernfs utility first appeared in 4.4BSD.

OpenBSD 2.9                     March 27, 1994                               2
