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mount_kernfs(8) [netbsd man page]

MOUNT_KERNFS(8) 					    BSD 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.  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 separated 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 format.  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 ALSO

     mount(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

Check Out this Related Man Page

MOUNT_FDESC(8)						    BSD System Manager's Manual 					    MOUNT_FDESC(8)

NAME

     mount_fdesc -- mount the file-descriptor file system

SYNOPSIS

     mount_fdesc [-o options] fdesc mount_point

DESCRIPTION

     The mount_fdesc command attaches an instance of the per-process file descriptor namespace to the global filesystem namespace.  The conven-
     tional mount point is /dev and the filesystem should be union mounted in order to augment, rather than replace, the existing entries in /dev.
     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 options are as follows:

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

     The contents of the mount point are fd, stderr, stdin, stdout and tty.

     fd is a directory whose contents appear as a list of numbered files which correspond to the open files of the process reading the directory.
     The files /dev/fd/0 through /dev/fd/# refer to file descriptors which can be accessed through the file system.  If the file descriptor is
     open and the mode the file is being opened with is a subset of the mode of the existing descriptor, the call:

	   fd = open("/dev/fd/0", mode);

     and the call:

	   fd = fcntl(0, F_DUPFD, 0);

     are equivalent.

     The files /dev/stdin, /dev/stdout and /dev/stderr appear as symlinks to the relevant entry in the /dev/fd sub-directory.  Opening them is
     equivalent to the following calls:

	   fd = fcntl(STDIN_FILENO,  F_DUPFD, 0);
	   fd = fcntl(STDOUT_FILENO, F_DUPFD, 0);
	   fd = fcntl(STDERR_FILENO, F_DUPFD, 0);

     Flags to the open(2) call other than O_RDONLY, O_WRONLY and O_RDWR are ignored.

     The /dev/tty entry is an indirect reference to the current process's controlling terminal.  It appears as a named pipe (FIFO) but behaves in
     exactly the same way as the real controlling terminal device.

FILES

     /dev/fd/#
     /dev/stdin
     /dev/stdout
     /dev/stderr
     /dev/tty

SEE ALSO

     mount(2), unmount(2), tty(4), fstab(5), mount(8)

HISTORY

     The mount_fdesc utility first appeared in 4.4BSD.

BUGS

     This filesystem may not be NFS-exported.

BSD
								  March 27, 1994							       BSD
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