.Dd August 24, 1993
.Dt MOUNT_PROCFS 8
.Os NetBSD 0.8a
.Sh NAME
.Nm mount_procfs
.Nd mount the proc file system
.Sh SYNOPSIS
.Nm mount_procfs
.Op Fl F Ar fsoptions
.Pa procfs
.Pa mount_point
.Sh DESCRIPTION
The
.Nm mount_procfs
command attaches an instance of the proc filesystem
to the global filesystem namespace.
The conventional mount point is
.Pa /proc .
This command is normally executed by
.Xr mount 8
at boot time.
.Pp
The proc filesystem presents a directory entry for each process in the system.
The name of an entry is process id in decimal notation.
Opening an entry for reading and/or writing gives access to the process
address space. Several ioctl(2) operations are available to gain additional
control over the process.
.Sh FILES
.Sh SEE ALSO
.Xr mount 2 ,
.Xr unmount 2 ,
.Xr fstab 5
.Sh CAVEATS
This filesystem may not be NFS-exported.
The interface and implementation of the proc filesystem are still under
development.
.Sh HISTORY
The
.Nm mount_procfs
utility first appeared in NetBSD 0.9.
em 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 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 kernfs
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
.Sh CAVEATS
This filesystem may not be NFS-exported.
.Sh HISTORY
The
.Nm mount_kernfs
utility first appeared in NetBSD 0.8a.