MOUNT_KERNFS(8) BSD System Manager's Manual MOUNT_KERNFS(8)NAMEmount_kernfs — mount the /kern file system
SYNOPSISmount_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. The directory specified by mount_point is converted to
an absolute path before use. 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-
independent 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 are specified with a -o flag followed by a comma sepa‐
rated string of options. See the mount(8) man page for possible
options and their meanings.
FILES
boottime the time at which the system was last booted (decimal ASCII).
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.
hz the frequency of the system clock (decimal ASCII).
ipsecsa the directory that contains IPsec security associations (SA)
in PF_KEY format. Filenames are SPI in decimal number. The
content of files can be inspected by using setkey(8).
ipsecsp the directory that contains IPsec security policies in PF_KEY
format. Filenames are security policy ID in decimal number.
The content of files can be inspected by using setkey(8).
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.
msgbuf the kernel message buffer, also read by syslogd(8), through
the log device, and by dmesg(8).
pagesize the machine pagesize (decimal ASCII).
physmem the number of pages of physical memory in the machine (decimal
ASCII).
rootdev the root device.
rrootdev the raw root device.
time the second and microsecond value of the system clock. Both
numbers are in decimal ASCII.
version the kernel version string. The head line for /etc/motd can be
generated by running: “sed 1q /kern/version”
SEE ALSOmount(2), unmount(2), ipsec(4), fstab(5), dmesg(8), mount(8), setkey(8),
syslogd(8)HISTORY
The mount_kernfs utility first appeared in 4.4BSD.
BUGS
This filesystem may not be NFS-exported.
lkm(4) version does not support IPsec-related files/directories.
BSD September 8, 2003 BSD
