2012 lines
70 KiB
Groff
2012 lines
70 KiB
Groff
|
.\" $NetBSD: sysctl.7,v 1.1 2006/12/04 08:59:13 pavel Exp $
|
||
|
|
.\"
|
||
|
|
.\" Copyright (c) 1993
|
||
|
|
.\" The Regents of the University of California. All rights reserved.
|
||
|
|
.\"
|
||
|
|
.\" 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. 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.
|
||
|
|
.\"
|
||
|
|
.\" @(#)sysctl.3 8.4 (Berkeley) 5/9/95
|
||
|
|
.\"
|
||
|
|
.Dd December 4, 2006
|
||
|
|
.Dt SYSCTL 7
|
||
|
|
.Os
|
||
|
|
.Sh NAME
|
||
|
|
.Nm sysctl
|
||
|
|
.Nd system information variables
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
The
|
||
|
|
.Xr sysctl 3
|
||
|
|
library function and the
|
||
|
|
.Xr sysctl 8
|
||
|
|
utility are used to get and set values of system variables, maintained
|
||
|
|
by the kernel.
|
||
|
|
The variables are organized in a tree and identified by a sequence of
|
||
|
|
numbers, conventionally separated by dots with the topmost identifier
|
||
|
|
at the left side.
|
||
|
|
The numbers have corresponding text names.
|
||
|
|
The
|
||
|
|
.Xr sysctlnametomib 3
|
||
|
|
function or the
|
||
|
|
.Fl M
|
||
|
|
argument to the
|
||
|
|
.Xr sysctl 8
|
||
|
|
utility can be used to convert the text representation to the
|
||
|
|
numeric one.
|
||
|
|
.Pp
|
||
|
|
The individual sysctl variables are described below, both the textual
|
||
|
|
and numeric form where applicable.
|
||
|
|
The textual names can be used as argument to the
|
||
|
|
.Xr sysctl 8
|
||
|
|
utility and in the file
|
||
|
|
.Pa /etc/sysctl.conf .
|
||
|
|
The numeric names are usually defined as preprocessor constants and
|
||
|
|
are intended for use by programs.
|
||
|
|
Every such constant expands to one integer, which identifies the
|
||
|
|
sysctl variable relative to the upper level of the tree.
|
||
|
|
See the
|
||
|
|
.Xr sysctl 3
|
||
|
|
manual page for programming examples.
|
||
|
|
.Sh Top level names
|
||
|
|
The top level names are defined with a CTL_ prefix in
|
||
|
|
.Aq Pa sys/sysctl.h ,
|
||
|
|
and are as follows.
|
||
|
|
The next and subsequent levels down are found in the include files
|
||
|
|
listed here, and described in separate sections below.
|
||
|
|
.Bl -column securityXX CTLXSECURITYXX "Next level namesXX"
|
||
|
|
.It Sy Name Constant Next level names Description
|
||
|
|
.It kern CTL\_KERN sys/sysctl.h High kernel limits
|
||
|
|
.It vm CTL\_VM uvm/uvm_param.h Virtual memory
|
||
|
|
.It vfs CTL\_VFS sys/mount.h Filesystem
|
||
|
|
.It net CTL\_NET sys/socket.h Networking
|
||
|
|
.It debug CTL\_DEBUG sys/sysctl.h Debugging
|
||
|
|
.It hw CTL\_HW sys/sysctl.h Generic CPU, I/O
|
||
|
|
.It machdep CTL\_MACHDEP sys/sysctl.h Machine dependent
|
||
|
|
.It user CTL\_USER sys/sysctl.h User-level
|
||
|
|
.It ddb CTL\_DDB sys/sysctl.h In-kernel debugger
|
||
|
|
.It proc CTL\_PROC sys/sysctl.h Per-process
|
||
|
|
.It vendor CTL\_VENDOR ? Vendor specific
|
||
|
|
.It emul CTL\_EMUL sys/sysctl.h Emulation settings
|
||
|
|
.It security CTL\_SECURITY sys/sysctl.h Security settings
|
||
|
|
.El
|
||
|
|
.Sh The debug.* subtree
|
||
|
|
The debugging variables vary from system to system.
|
||
|
|
A debugging variable may be added or deleted without need to recompile
|
||
|
|
.Nm
|
||
|
|
to know about it.
|
||
|
|
Each time it runs,
|
||
|
|
.Nm
|
||
|
|
gets the list of debugging variables from the kernel and
|
||
|
|
displays their current values.
|
||
|
|
The system defines twenty
|
||
|
|
.Va ( struct ctldebug )
|
||
|
|
variables named
|
||
|
|
.Dv debug0
|
||
|
|
through
|
||
|
|
.Dv debug19 .
|
||
|
|
They are declared as separate variables so that they can be
|
||
|
|
individually initialized at the location of their associated variable.
|
||
|
|
The loader prevents multiple use of the same variable by issuing errors
|
||
|
|
if a variable is initialized in more than one place.
|
||
|
|
For example, to export the variable
|
||
|
|
.Dv dospecialcheck
|
||
|
|
as a debugging variable, the following declaration would be used:
|
||
|
|
.Bd -literal -offset indent -compact
|
||
|
|
int dospecialcheck = 1;
|
||
|
|
struct ctldebug debug5 = { "dospecialcheck", \*[Am]dospecialcheck };
|
||
|
|
.Ed
|
||
|
|
.Pp
|
||
|
|
Note that the dynamic implementation of
|
||
|
|
.Nm
|
||
|
|
currently in use largely makes this particular
|
||
|
|
.Nm
|
||
|
|
interface obsolete.
|
||
|
|
See
|
||
|
|
.Xr sysctl 8
|
||
|
|
.\" and
|
||
|
|
.\" .Xr sysctl 9
|
||
|
|
for more information.
|
||
|
|
.Sh The vfs.* subtree
|
||
|
|
A distinguished second level name,
|
||
|
|
.Li vfs.generic ( VFS_GENERIC ) ,
|
||
|
|
is used to get general information about all filesystems.
|
||
|
|
One of its third level identifiers is
|
||
|
|
.Li vfs.generic.maxtypenum ( VFS_MAXTYPENUM )
|
||
|
|
that gives the highest valid filesystem type number.
|
||
|
|
Its other third level identifier is
|
||
|
|
.Li vfs.generic.conf ( VFS_CONF )
|
||
|
|
that returns configuration information about the filesystem
|
||
|
|
type given as a fourth level identifier.
|
||
|
|
The remaining second level identifiers are the
|
||
|
|
filesystem type number returned by a
|
||
|
|
.Xr statvfs 2
|
||
|
|
call or from
|
||
|
|
.Li vfs.generic.conf .
|
||
|
|
The third level identifiers available for each filesystem
|
||
|
|
are given in the header file that defines the mount
|
||
|
|
argument structure for that filesystem.
|
||
|
|
.Sh The hw.* subtree
|
||
|
|
The string and integer information available for the
|
||
|
|
.Li hw
|
||
|
|
level is detailed below.
|
||
|
|
The changeable column shows whether a process with appropriate
|
||
|
|
privilege may change the value.
|
||
|
|
.Bl -column "Second level nameXXXXXX" "struct disk_sysctlXXX" -offset indent
|
||
|
|
.It Sy Second level name Type Changeable
|
||
|
|
.It hw.alignbytes integer no
|
||
|
|
.It hw.byteorder integer no
|
||
|
|
.It hw.cnmagic string yes
|
||
|
|
.It hw.disknames string no
|
||
|
|
.It hw.diskstats struct no
|
||
|
|
.It hw.machine string no
|
||
|
|
.It hw.machine_arch string no
|
||
|
|
.It hw.model string no
|
||
|
|
.It hw.ncpu integer no
|
||
|
|
.It hw.pagesize integer no
|
||
|
|
.It hw.physmem integer no
|
||
|
|
.It hw.physmem64 quad no
|
||
|
|
.It hw.usermem integer no
|
||
|
|
.It hw.usermem64 quad no
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li hw.alignbytes ( HW_ALIGNBYTES )
|
||
|
|
Alignment constraint for all possible data types.
|
||
|
|
This shows the value
|
||
|
|
.Dv ALIGNBYTES
|
||
|
|
in
|
||
|
|
.Pa /usr/include/machine/param.h ,
|
||
|
|
at the kernel compilation time.
|
||
|
|
.It Li hw.byteorder ( HW_BYTEORDER )
|
||
|
|
The byteorder (4,321, or 1,234).
|
||
|
|
.It Li hw.cnmagic ( HW_CNMAGIC )
|
||
|
|
The console magic key sequence.
|
||
|
|
.It Li hw.disknames ( HW_DISKNAMES )
|
||
|
|
The list of (space separated) disk device names on the system.
|
||
|
|
.It Li hw.iostatnames ( HW_IOSTATNAMES )
|
||
|
|
A space separated list of devices that will have I/O statistics
|
||
|
|
collected on them.
|
||
|
|
.It Li hw.iostats ( HW_IOSTATS )
|
||
|
|
Return statistical information on the NFS mounts, disk and tape
|
||
|
|
devices on the system.
|
||
|
|
An array of
|
||
|
|
.Va struct io_sysctl
|
||
|
|
structures is returned,
|
||
|
|
whose size depends on the current number of such objects in the system.
|
||
|
|
The third level name is the size of the
|
||
|
|
.Va struct io_sysctl .
|
||
|
|
The type of object can be determined by examining the
|
||
|
|
.Va type
|
||
|
|
element of
|
||
|
|
.Va struct io_sysctl .
|
||
|
|
Which can be
|
||
|
|
.Dv IOSTAT_DISK
|
||
|
|
(disk drive),
|
||
|
|
.Dv IOSTAT_TAPE
|
||
|
|
(tape drive), or
|
||
|
|
.Dv IOSTAT_NFS
|
||
|
|
(NFS mount).
|
||
|
|
.It Li hw.machine ( HW_MACHINE )
|
||
|
|
The machine class.
|
||
|
|
.It Li hw.machine_arch ( HW_MACHINE_ARCH )
|
||
|
|
The machine CPU class.
|
||
|
|
.It Li hw.model ( HW_MODEL )
|
||
|
|
The machine model.
|
||
|
|
.It Li hw.ncpu ( HW_NCPU )
|
||
|
|
The number of CPUs.
|
||
|
|
.ne 1i
|
||
|
|
.It Li hw.pagesize ( HW_PAGESIZE )
|
||
|
|
The software page size.
|
||
|
|
.It Li hw.physmem ( HW_PHYSMEM )
|
||
|
|
The bytes of physical memory as a 32-bit integer.
|
||
|
|
.It Li hw.physmem64 ( HW_PHYSMEM64 )
|
||
|
|
The bytes of physical memory as a 64-bit integer.
|
||
|
|
.It Li hw.usermem ( HW_USERMEM )
|
||
|
|
The bytes of non-kernel memory as a 32-bit integer.
|
||
|
|
.It Li hw.usermem64 ( HW_USERMEM64 )
|
||
|
|
The bytes of non-kernel memory as a 64-bit integer.
|
||
|
|
.El
|
||
|
|
.Sh The kern.* subtree
|
||
|
|
The string and integer information available for the
|
||
|
|
.Li kern
|
||
|
|
level is detailed below.
|
||
|
|
The changeable column shows whether a process with appropriate
|
||
|
|
privilege may change the value.
|
||
|
|
The types of data currently available are process information,
|
||
|
|
system vnodes, the open file entries, routing table entries,
|
||
|
|
virtual memory statistics, load average history, and clock rate
|
||
|
|
information.
|
||
|
|
.Bl -column "kern.posix_reader_writer_locks" "struct clockrateXXX" -offset indent
|
||
|
|
.It Sy Second level name Type Changeable
|
||
|
|
.It kern.argmax integer no
|
||
|
|
.It kern.autonicetime integer yes
|
||
|
|
.It kern.autoniceval integer yes
|
||
|
|
.It kern.boottime struct timeval no
|
||
|
|
.It kern.bufq node not applicable
|
||
|
|
.It kern.ccpu integer no
|
||
|
|
.It kern.clockrate struct clockinfo no
|
||
|
|
.It kern.consdev integer no
|
||
|
|
.It kern.cp\_id struct no
|
||
|
|
.It kern.cp\_time uint64_t[\|] no
|
||
|
|
.It kern.defcorename string yes
|
||
|
|
.It kern.domainname string yes
|
||
|
|
.It kern.drivers struct kinfo_drivers no
|
||
|
|
.It kern.file struct file no
|
||
|
|
.It kern.forkfsleep integer yes
|
||
|
|
.It kern.fscale integer no
|
||
|
|
.It kern.fsync integer no
|
||
|
|
.It kern.hardclock\_ticks integer no
|
||
|
|
.It kern.hostid integer yes
|
||
|
|
.It kern.hostname string yes
|
||
|
|
.It kern.iov\_max integer no
|
||
|
|
.It kern.job\_control integer no
|
||
|
|
.It kern.labeloffset integer no
|
||
|
|
.It kern.labelsector integer no
|
||
|
|
.It kern.login\_name\_max integer no
|
||
|
|
.It kern.logsigexit integer yes
|
||
|
|
.It kern.mapped\_files integer no
|
||
|
|
.It kern.maxfiles integer yes
|
||
|
|
.It kern.maxpartitions integer no
|
||
|
|
.It kern.maxphys integer no
|
||
|
|
.It kern.maxproc integer yes
|
||
|
|
.It kern.maxptys integer yes
|
||
|
|
.It kern.maxvnodes integer yes
|
||
|
|
.It kern.mbuf node not applicable
|
||
|
|
.It kern.memlock integer no
|
||
|
|
.It kern.memlock\_range integer no
|
||
|
|
.It kern.memory\_protection integer no
|
||
|
|
.It kern.monotonic\_clock integer no
|
||
|
|
.It kern.msgbuf integer no
|
||
|
|
.It kern.msgbufsize integer no
|
||
|
|
.It kern.ngroups integer no
|
||
|
|
.It kern.ntptime struct ntptimeval no
|
||
|
|
.It kern.osrelease string no
|
||
|
|
.It kern.osrev integer no
|
||
|
|
.It kern.ostype string no
|
||
|
|
.It kern.pipe node not applicable
|
||
|
|
.It kern.posix1 integer no
|
||
|
|
.It kern.posix\_barriers integer no
|
||
|
|
.It kern.posix\_reader\_writer\_locks integer no
|
||
|
|
.It kern.posix\_semaphores integer no
|
||
|
|
.It kern.posix\_spin\_locks integer no
|
||
|
|
.It kern.posix\_threads integer no
|
||
|
|
.It kern.posix\_timers integer no
|
||
|
|
.It kern.proc struct kinfo_proc no
|
||
|
|
.It kern.proc2 struct kinfo_proc2 no
|
||
|
|
.It kern.proc\_args string no
|
||
|
|
.It kern.prof node not applicable
|
||
|
|
.It kern.rawpartition integer no
|
||
|
|
.It kern.root\_device string no
|
||
|
|
.It kern.root\_partition integer no
|
||
|
|
.It kern.rtc\_offset integer yes
|
||
|
|
.It kern.saved\_ids integer no
|
||
|
|
.It kern.securelevel integer raise only
|
||
|
|
.It kern.synchronized\_io integer no
|
||
|
|
.It kern.ipc node not applicable
|
||
|
|
.It kern.timex struct no
|
||
|
|
.It kern.tkstat node not applicable
|
||
|
|
.It kern.urandom integer no
|
||
|
|
.It kern.version string no
|
||
|
|
.It kern.vnode struct vnode no
|
||
|
|
.El
|
||
|
|
.ne 1i
|
||
|
|
.Pp
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li kern.argmax ( KERN_ARGMAX )
|
||
|
|
The maximum bytes of argument to
|
||
|
|
.Xr execve 2 .
|
||
|
|
.It Li kern.autonicetime ( KERN_AUTONICETIME )
|
||
|
|
The number of seconds of CPU-time a non-root process may accumulate before
|
||
|
|
having its priority lowered from the default to the value of KERN_AUTONICEVAL.
|
||
|
|
If set to 0, automatic lowering of priority is not performed, and if set to \-1
|
||
|
|
all non-root processes are immediately lowered.
|
||
|
|
.It Li kern.autoniceval ( KERN_AUTONICEVAL )
|
||
|
|
The priority assigned for automatically niced processes.
|
||
|
|
.It Li kern.boottime ( KERN_BOOTTIME )
|
||
|
|
A
|
||
|
|
.Va struct timeval
|
||
|
|
structure is returned.
|
||
|
|
This structure contains the time that the system was booted.
|
||
|
|
.It Li kern.ccpu ( KERN_CCPU )
|
||
|
|
The scheduler exponential decay value.
|
||
|
|
.It Li kern.clockrate ( KERN_CLOCKRATE )
|
||
|
|
A
|
||
|
|
.Va struct clockinfo
|
||
|
|
structure is returned.
|
||
|
|
This structure contains the clock, statistics clock and profiling clock
|
||
|
|
frequencies, the number of micro-seconds per hz tick, and the clock
|
||
|
|
skew rate.
|
||
|
|
.It Li kern.consdev ( KERN_CONSDEV )
|
||
|
|
Console device.
|
||
|
|
.It Li kern.cp_id ( KERN_CP_ID )
|
||
|
|
Mapping of CPU number to CPU id.
|
||
|
|
.It Li kern.cp_time ( KERN_CP_TIME )
|
||
|
|
Returns an array of CPUSTATES uint64_ts.
|
||
|
|
This array contains the
|
||
|
|
number of clock ticks spent in different CPU states.
|
||
|
|
On multi-processor systems, the sum across all CPUs is returned unless
|
||
|
|
appropriate space is given for one data set for each CPU.
|
||
|
|
Data for a specific CPU can also be obtained by adding the number of the
|
||
|
|
CPU at the end of the MIB, enlarging it by one.
|
||
|
|
.It Li kern.defcorename ( KERN_DEFCORENAME )
|
||
|
|
Default template for the name of core dump files (see also
|
||
|
|
.Li proc.pid.corename
|
||
|
|
in the per-process variables
|
||
|
|
.Li proc.* ,
|
||
|
|
and
|
||
|
|
.Xr core 5
|
||
|
|
for format of this template).
|
||
|
|
The default value is
|
||
|
|
.Nm %n.core
|
||
|
|
and can be changed with the kernel configuration option
|
||
|
|
.Cd options DEFCORENAME
|
||
|
|
(see
|
||
|
|
.Xr options 4
|
||
|
|
).
|
||
|
|
.It Li kern.domainname ( KERN_DOMAINNAME )
|
||
|
|
Get or set the YP domain name.
|
||
|
|
.It Li kern.dump_on_panic ( KERN_DUMP_ON_PANIC )
|
||
|
|
Perform a crash dump on system panic.
|
||
|
|
.It Li kern.drivers ( KERN_DRIVERS )
|
||
|
|
Return an array of
|
||
|
|
.Va struct kinfo_drivers
|
||
|
|
that contains the name and major device numbers of all the device drivers
|
||
|
|
in the current kernel.
|
||
|
|
The
|
||
|
|
.Va d_name
|
||
|
|
field is always a NUL terminated string.
|
||
|
|
The
|
||
|
|
.Va d_bmajor
|
||
|
|
field will be set to \-1 if the driver doesn't have a block device.
|
||
|
|
.It Li kern.file ( KERN_FILE )
|
||
|
|
Return the entire file table.
|
||
|
|
The returned data consists of a single
|
||
|
|
.Va struct filelist
|
||
|
|
followed by an array of
|
||
|
|
.Va struct file ,
|
||
|
|
whose size depends on the current number of such objects in the system.
|
||
|
|
.It Li kern.forkfsleep ( KERN_FORKFSLEEP )
|
||
|
|
If
|
||
|
|
.Xr fork 2
|
||
|
|
system call fails due to limit on number of processes (either
|
||
|
|
the global maxproc limit or user's one), wait for this many
|
||
|
|
milliseconds before returning
|
||
|
|
.Er EAGAIN
|
||
|
|
error to process.
|
||
|
|
Useful to keep heavily forking runaway processes in bay.
|
||
|
|
Default zero (no sleep).
|
||
|
|
Maximum is 20 seconds.
|
||
|
|
.It Li kern.fscale ( KERN_FSCALE )
|
||
|
|
The kernel fixed-point scale factor.
|
||
|
|
.It Li kern.fsync ( KERN_FSYNC )
|
||
|
|
Return 1 if the POSIX 1003.1b File Synchronization Option is available
|
||
|
|
on this system,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.hardclock_ticks ( KERN_HARDCLOCK_TICKS )
|
||
|
|
Returns the number of
|
||
|
|
.Xr hardclock 9
|
||
|
|
ticks.
|
||
|
|
.It Li kern.hostid ( KERN_HOSTID )
|
||
|
|
Get or set the host id.
|
||
|
|
.It Li kern.hostname ( KERN_HOSTNAME )
|
||
|
|
Get or set the hostname.
|
||
|
|
.It Li kern.iov_max ( KERN_IOV_MAX )
|
||
|
|
Return the maximum number of
|
||
|
|
.Va iovec
|
||
|
|
structures that a process has available for use with
|
||
|
|
.Xr preadv 2 ,
|
||
|
|
.Xr pwritev 2 ,
|
||
|
|
.Xr readv 2 ,
|
||
|
|
.Xr recvmsg 2 ,
|
||
|
|
.Xr sendmsg 2
|
||
|
|
and
|
||
|
|
.Xr writev 2 .
|
||
|
|
.It Li kern.job_control ( KERN_JOB_CONTROL )
|
||
|
|
Return 1 if job control is available on this system, otherwise 0.
|
||
|
|
.It Li kern.labeloffset ( KERN_LABELOFFSET )
|
||
|
|
The offset within the sector specified by KERN_LABELSECTOR of the
|
||
|
|
.Xr disklabel 5 .
|
||
|
|
.It Li kern.labelsector ( KERN_LABELSECTOR )
|
||
|
|
The sector number containing the
|
||
|
|
.Xr disklabel 5 .
|
||
|
|
.It Li kern.login_name_max ( KERN_LOGIN_NAME_MAX )
|
||
|
|
The size of the storage required for a login name, in bytes,
|
||
|
|
including the terminating NUL.
|
||
|
|
.It Li kern.logsigexit ( KERN_LOGSIGEXIT )
|
||
|
|
If this flag is non-zero, the kernel will
|
||
|
|
.Xr log 9
|
||
|
|
all process exits due to signals which create a
|
||
|
|
.Xr core 5
|
||
|
|
file, and whether the coredump was created.
|
||
|
|
.It Li kern.mapped_files ( KERN_MAPPED_FILES )
|
||
|
|
Returns 1 if the POSIX 1003.1b Memory Mapped Files Option is available
|
||
|
|
on this system,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.maxfiles ( KERN_MAXFILES )
|
||
|
|
The maximum number of open files that may be open in the system.
|
||
|
|
.It Li kern.maxpartitions ( KERN_MAXPARTITIONS )
|
||
|
|
The maximum number of partitions allowed per disk.
|
||
|
|
.It Li kern.maxphys ( KERN_MAXPHYS )
|
||
|
|
Maximum raw I/O transfer size.
|
||
|
|
.It Li kern.maxproc ( KERN_MAXPROC )
|
||
|
|
The maximum number of simultaneous processes the system will allow.
|
||
|
|
.It Li kern.maxptys ( KERN_MAXPTYS )
|
||
|
|
The maximum number of pseudo terminals.
|
||
|
|
This value can be both raised and lowered, though it cannot
|
||
|
|
be set lower than number of currently used ptys.
|
||
|
|
See also
|
||
|
|
.Xr pty 4 .
|
||
|
|
.It Li kern.maxvnodes ( KERN_MAXVNODES )
|
||
|
|
The maximum number of vnodes available on the system.
|
||
|
|
This can only be raised.
|
||
|
|
.It Li kern.mbuf ( KERN_MBUF )
|
||
|
|
Return information about the mbuf control variables.
|
||
|
|
Mbufs are data structures which store network packets and other data
|
||
|
|
structures in the networking code, see
|
||
|
|
.Xr mbuf 9 .
|
||
|
|
The third level names for the mbuf variables are detailed below.
|
||
|
|
The changeable column shows whether a process with appropriate
|
||
|
|
privilege may change the value.
|
||
|
|
.Bl -column "kern.mbuf.nmbclusters" "struct integerXXX" -offset indent
|
||
|
|
.It Sy Third level name Type Changeable
|
||
|
|
.\" XXX Changeable? really?
|
||
|
|
.It kern.mbuf.mblowat integer yes
|
||
|
|
.It kern.mbuf.mclbytes integer yes
|
||
|
|
.It kern.mbuf.mcllowat integer yes
|
||
|
|
.It kern.mbuf.msize integer yes
|
||
|
|
.It kern.mbuf.nmbclusters integer yes
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
The variables are as follows:
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li kern.mbuf.mblowat ( MBUF_MBLOWAT )
|
||
|
|
The mbuf low water mark.
|
||
|
|
.It Li kern.mbuf.mclbytes ( MBUF_MCLBYTES )
|
||
|
|
The mbuf cluster size.
|
||
|
|
.It Li kern.mbuf.mcllowat ( MBUF_MCLLOWAT )
|
||
|
|
The mbuf cluster low water mark.
|
||
|
|
.It Li kern.mbuf.msize ( MBUF_MSIZE )
|
||
|
|
The mbuf base size.
|
||
|
|
.It Li kern.mbuf.nmbclusters ( MBUF_NMBCLUSTERS )
|
||
|
|
The limit on the number of mbuf clusters.
|
||
|
|
The variable can only be increased, and only increased on machines with
|
||
|
|
direct-mapped pool pages.
|
||
|
|
.El
|
||
|
|
.It Li kern.memlock ( KERN_MEMLOCK )
|
||
|
|
Returns 1 if the POSIX 1003.1b Process Memory Locking Option is available
|
||
|
|
on this system,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.memlock_range ( KERN_MEMLOCK_RANGE )
|
||
|
|
Returns 1 if the POSIX 1003.1b Range Memory Locking Option is available
|
||
|
|
on this system,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.memory_protection ( KERN_MEMORY_PROTECTION )
|
||
|
|
Returns 1 if the POSIX 1003.1b Memory Protection Option is available
|
||
|
|
on this system,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.monotonic_clock ( KERN_MONOTONIC_CLOCK )
|
||
|
|
Returns the standard version the implementation of the POSIX 1003.1b
|
||
|
|
Monotonic Clock Option conforms to,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.msgbuf ( KERN_MSGBUF )
|
||
|
|
The kernel message buffer, rotated so that the head of the circular kernel
|
||
|
|
message buffer is at the start of the returned data.
|
||
|
|
The returned data may contain NUL bytes.
|
||
|
|
.It Li kern.msgbufsize ( KERN_MSGBUFSIZE )
|
||
|
|
The maximum number of characters that the kernel message buffer can hold.
|
||
|
|
.It Li kern.ngroups ( KERN_NGROUPS )
|
||
|
|
The maximum number of supplemental groups.
|
||
|
|
.It Li kern.ntptime ( KERN_NTPTIME )
|
||
|
|
A
|
||
|
|
.Va struct ntptimeval
|
||
|
|
structure is returned.
|
||
|
|
This structure contains data used by the
|
||
|
|
.Xr ntpd 8
|
||
|
|
program.
|
||
|
|
.It Li kern.osrelease ( KERN_OSRELEASE )
|
||
|
|
The system release string.
|
||
|
|
.It Li kern.osrevision ( KERN_OSREV )
|
||
|
|
The system revision string.
|
||
|
|
.It Li kern.ostype ( KERN_OSTYPE )
|
||
|
|
The system type string.
|
||
|
|
.It Li kern.pipe ( KERN_PIPE )
|
||
|
|
Pipe settings.
|
||
|
|
The third level names for the integer pipe settings is detailed below.
|
||
|
|
The changeable column shows whether a process with appropriate
|
||
|
|
privilege may change the value.
|
||
|
|
.Bl -column "kern.pipe.maxbigpipesXXX" "integerXXX" -offset indent
|
||
|
|
.It Sy Third level name Type Changeable
|
||
|
|
.It kern.pipe.kvasiz integer yes
|
||
|
|
.It kern.pipe.maxbigpipes integer yes
|
||
|
|
.It kern.pipe.maxkvasz integer yes
|
||
|
|
.It kern.pipe.limitkva integer yes
|
||
|
|
.It kern.pipe.nbigpipes integer yes
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
The variables are as follows:
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li kern.pipe.kvasiz ( KERN_PIPE_KVASIZ )
|
||
|
|
Amount of kernel memory consumed by pipe buffers.
|
||
|
|
.It Li kern.pipe.maxbigpipes ( KERN_PIPE_MAXBIGPIPES )
|
||
|
|
Maximum number of "big" pipes.
|
||
|
|
.It Li kern.pipe.maxkvasz ( KERN_PIPE_MAXKVASZ )
|
||
|
|
Maximum amount of kernel memory to be used for pipes.
|
||
|
|
.It Li kern.pipe.limitkva ( KERN_PIPE_LIMITKVA )
|
||
|
|
Limit for direct transfers via page loan.
|
||
|
|
.It Li kern.pipe.nbigpipes ( KERN_PIPE_NBIGPIPES )
|
||
|
|
Number of "big" pipes.
|
||
|
|
.El
|
||
|
|
.It Li kern.posix1version ( KERN_POSIX1 )
|
||
|
|
The version of ISO/IEC 9945 (POSIX 1003.1) with which the system
|
||
|
|
attempts to comply.
|
||
|
|
.It Li kern.posix_barriers ( KERN_POSIX_BARRIERS )
|
||
|
|
The version of
|
||
|
|
.St -p1003.1
|
||
|
|
and its
|
||
|
|
Barriers
|
||
|
|
option to which the system attempts to conform,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.posix_reader_writer_locks ( KERN_POSIX_READER_WRITER_LOCKS )
|
||
|
|
The version of
|
||
|
|
.St -p1003.1
|
||
|
|
and its
|
||
|
|
Read-Write Locks
|
||
|
|
option to which the system attempts to conform,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.posix_semaphores ( KERN_POSIX_SEMAPHORES )
|
||
|
|
The version of
|
||
|
|
.St -p1003.1
|
||
|
|
and its
|
||
|
|
Semaphores
|
||
|
|
option to which the system attempts to conform,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.posix_spin_locks ( KERN_POSIX_SPIN_LOCKS )
|
||
|
|
The version of
|
||
|
|
.St -p1003.1
|
||
|
|
and its
|
||
|
|
Spin Locks
|
||
|
|
option to which the system attempts to conform,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.posix_threads ( KERN_POSIX_THREADS )
|
||
|
|
The version of
|
||
|
|
.St -p1003.1
|
||
|
|
and its
|
||
|
|
Threads
|
||
|
|
option to which the system attempts to conform,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.posix_timers ( KERN_POSIX_TIMERS )
|
||
|
|
The version of
|
||
|
|
.St -p1003.1
|
||
|
|
and its
|
||
|
|
Timers
|
||
|
|
option to which the system attempts to conform,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.proc ( KERN_PROC )
|
||
|
|
Return the entire process table, or a subset of it.
|
||
|
|
An array of
|
||
|
|
.Va struct kinfo_proc
|
||
|
|
structures is returned,
|
||
|
|
whose size depends on the current number of such objects in the system.
|
||
|
|
The third and fourth level numeric names are as follows:
|
||
|
|
.Bl -column "Third level nameXXXXXX" "Fourth level is:XXXXXX" -offset indent
|
||
|
|
.It Sy Third level name Fourth level is:
|
||
|
|
.It KERN\_PROC\_ALL None
|
||
|
|
.It KERN\_PROC\_GID A group ID
|
||
|
|
.It KERN\_PROC\_PID A process ID
|
||
|
|
.It KERN\_PROC\_PGRP A process group
|
||
|
|
.It KERN\_PROC\_RGID A real group ID
|
||
|
|
.It KERN\_PROC\_RUID A real user ID
|
||
|
|
.It KERN\_PROC\_SESSION A session ID
|
||
|
|
.It KERN\_PROC\_TTY A tty device
|
||
|
|
.It KERN\_PROC\_UID A user ID
|
||
|
|
.El
|
||
|
|
.It Li kern.proc2 ( KERN_PROC2 )
|
||
|
|
As for KERN_PROC, but an array of
|
||
|
|
.Va struct kinfo_proc2
|
||
|
|
structures are returned.
|
||
|
|
The fifth level name is the size of the
|
||
|
|
.Va struct kinfo_proc2
|
||
|
|
and the sixth level name is the number of structures to return.
|
||
|
|
.It Li kern.proc_args ( KERN_PROC_ARGS )
|
||
|
|
Return the argv or environment strings (or the number thereof)
|
||
|
|
of a process.
|
||
|
|
Multiple strings are returned separated by NUL characters.
|
||
|
|
The third level name is the process ID.
|
||
|
|
The fourth level name is as follows:
|
||
|
|
.Bl -column "Third level nameXXXXXX" -offset indent
|
||
|
|
.It KERN\_PROC\_ARGV The argv strings
|
||
|
|
.It KERN\_PROC\_ENV The environ strings
|
||
|
|
.It KERN\_PROC\_NARGV The number of argv strings
|
||
|
|
.It KERN\_PROC\_NENV The number of environ strings
|
||
|
|
.El
|
||
|
|
.It Li kern.profiling ( KERN_PROF )
|
||
|
|
Return profiling information about the kernel.
|
||
|
|
If the kernel is not compiled for profiling,
|
||
|
|
attempts to retrieve any of the KERN_PROF values will
|
||
|
|
fail with
|
||
|
|
.Er EOPNOTSUPP .
|
||
|
|
The third level names for the string and integer profiling information
|
||
|
|
is detailed below.
|
||
|
|
The changeable column shows whether a process with appropriate
|
||
|
|
privilege may change the value.
|
||
|
|
.Bl -column "kern.profiling.gmonparam" "struct gmonparam" -offset indent
|
||
|
|
.It Sy Third level name Type Changeable
|
||
|
|
.It kern.profiling.count u_short[\|] yes
|
||
|
|
.It kern.profiling.froms u_short[\|] yes
|
||
|
|
.It kern.profiling.gmonparam struct gmonparam no
|
||
|
|
.It kern.profiling.state integer yes
|
||
|
|
.It kern.profiling.tos struct tostruct yes
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
The variables are as follows:
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li kern.profiling.count ( GPROF_COUNT )
|
||
|
|
Array of statistical program counter counts.
|
||
|
|
.It Li kern.profiling.froms ( GPROF_FROMS )
|
||
|
|
Array indexed by program counter of call-from points.
|
||
|
|
.It Li kern.profiling.gmonparams ( GPROF_GMONPARAM )
|
||
|
|
Structure giving the sizes of the above arrays.
|
||
|
|
.It Li kern.profiling.state ( GPROF_STATE )
|
||
|
|
Profiling state.
|
||
|
|
If set to GMON_PROF_ON, starts profiling.
|
||
|
|
If set to GMON_PROF_OFF, stops profiling.
|
||
|
|
.It Li kern.profiling.tos ( GPROF_TOS )
|
||
|
|
Array of
|
||
|
|
.Va struct tostruct
|
||
|
|
describing destination of calls and their counts.
|
||
|
|
.El
|
||
|
|
.It Li kern.rawpartition ( KERN_RAWPARTITION )
|
||
|
|
The raw partition of a disk (a == 0).
|
||
|
|
.It Li kern.root_device ( KERN_ROOT_DEVICE )
|
||
|
|
The name of the root device (e.g.,
|
||
|
|
.Dq wd0 ) .
|
||
|
|
.It Li kern.root_partition ( KERN_ROOT_PARTITION )
|
||
|
|
The root partition on the root device (a == 0).
|
||
|
|
.It Li kern.rtc_offset ( KERN_RTC_OFFSET )
|
||
|
|
Return the offset of real time clock from UTC in minutes.
|
||
|
|
.It Li kern.saved_ids ( KERN_SAVED_IDS )
|
||
|
|
Returns 1 if saved set-group and saved set-user ID is available.
|
||
|
|
.It Li kern.sbmax ( KERN_SBMAX )
|
||
|
|
Maximum socket buffer size.
|
||
|
|
.\" XXX units?
|
||
|
|
.It Li kern.securelevel ( KERN_SECURELVL )
|
||
|
|
The system security level.
|
||
|
|
This level may be raised by processes with appropriate privilege.
|
||
|
|
It may only be lowered by process 1.
|
||
|
|
.It Li kern.somaxkva ( KERN_SOMAXKVA )
|
||
|
|
Maximum amount of kernel memory to be used for socket buffers.
|
||
|
|
.\" XXX units?
|
||
|
|
.It Li kern.synchronized_io ( KERN_SYNCHRONIZED_IO )
|
||
|
|
Returns 1 if the POSIX 1003.1b Synchronized I/O Option is available
|
||
|
|
on this system,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.ipc ( KERN_SYSVIPC )
|
||
|
|
Return information about the SysV IPC parameters. The third
|
||
|
|
level names for the ipc variables are detailed below.
|
||
|
|
.Bl -column "KERN_SYSVIPC_MSGXXX" "integerXXX" "noXXX" -offset indent
|
||
|
|
.It Sy Third level name Type Changeable
|
||
|
|
.It kern.ipc.sysvmsg integer no
|
||
|
|
.It kern.ipc.sysvsem integer no
|
||
|
|
.It kern.ipc.sysvshm integer no
|
||
|
|
.It kern.ipc.sysvipc_info struct no
|
||
|
|
.It kern.ipc.shmmax integer no
|
||
|
|
.It kern.ipc.shmmni integer yes
|
||
|
|
.It kern.ipc.shmseg integer yes
|
||
|
|
.It kern.ipc.shmmaxpgs integer yes
|
||
|
|
.It kern.ipc.shm_use_phys integer yes
|
||
|
|
.El
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li kern.ipc.sysvmsg ( KERN_SYSVIPC_MSG )
|
||
|
|
Returns 1 if System V style message queue functionality is available
|
||
|
|
on this system,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.ipc.sysvsem ( KERN_SYSVIPC_SEM )
|
||
|
|
Returns 1 if System V style semaphore functionality is available
|
||
|
|
on this system,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.ipc.sysvshm ( KERN_SYSVIPC_SHM )
|
||
|
|
Returns 1 if System V style share memory functionality is available
|
||
|
|
on this system,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li kern.ipc.sysvipc_info ( KERN_SYSVIPC_INFO )
|
||
|
|
Return System V style IPC configuration and run-time information.
|
||
|
|
The fourth level name selects the System V style IPC facility.
|
||
|
|
.Bl -column "KERN_SYSVIPC_MSG_INFOXXX" "struct shm_sysctl_infoXXX" -offset indent
|
||
|
|
.It Sy Fourth level name Type
|
||
|
|
.It KERN\_SYSVIPC\_MSG\_INFO struct msg_sysctl_info
|
||
|
|
.It KERN\_SYSVIPC\_SEM\_INFO struct sem_sysctl_info
|
||
|
|
.It KERN\_SYSVIPC\_SHM\_INFO struct shm_sysctl_info
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li KERN_SYSVIPC_MSG_INFO
|
||
|
|
Return information on the System V style message facility.
|
||
|
|
The
|
||
|
|
.Sy msg_sysctl_info
|
||
|
|
structure is defined in
|
||
|
|
.Aq Pa sys/msg.h .
|
||
|
|
.It Li KERN_SYSVIPC_SEM_INFO
|
||
|
|
Return information on the System V style semaphore facility.
|
||
|
|
The
|
||
|
|
.Sy sem_sysctl_info
|
||
|
|
structure is defined in
|
||
|
|
.Aq Pa sys/sem.h .
|
||
|
|
.It Li KERN_SYSVIPC_SHM_INFO
|
||
|
|
Return information on the System V style shared memory facility.
|
||
|
|
The
|
||
|
|
.Sy shm_sysctl_info
|
||
|
|
structure is defined in
|
||
|
|
.Aq Pa sys/shm.h .
|
||
|
|
.El
|
||
|
|
.It Li kern.ipc.shmmax ( KERN_SYSVIPC_SHMMAX )
|
||
|
|
Max shared memory segment size in bytes.
|
||
|
|
.It Li kern.ipc.shmmni ( KERN_SYSVIPC_SHMMNI )
|
||
|
|
Max number of shared memory identifiers.
|
||
|
|
.It Li kern.ipc.shmseg ( KERN_SYSVIPC_SHMSEG )
|
||
|
|
Max shared memory segments per process.
|
||
|
|
.It Li kern.ipc.shmmaxpgs ( KERN_SYSVIPC_SHMMAXPGS )
|
||
|
|
Max amount of shared memory in pages.
|
||
|
|
.It Li kern.ipc.shm_use_phys ( KERN_SYSVIPC_SHMUSEPHYS )
|
||
|
|
Locking of shared memory in physical memory. If 0, memory can be swaped
|
||
|
|
out, otherwise it will be locked in physical memory.
|
||
|
|
.El
|
||
|
|
.It Li kern.timex ( KERN_TIMEX )
|
||
|
|
Not available.
|
||
|
|
.It Li kern.tkstat ( KERN_TKSTAT )
|
||
|
|
Return information about the number of characters sent and received
|
||
|
|
on ttys.
|
||
|
|
The third level names for the tty statistic variables are detailed below.
|
||
|
|
The changeable column shows whether a process
|
||
|
|
with appropriate privilege may change the value.
|
||
|
|
.Bl -column "KERNXTKSTATXRAWCCXXX" "struct integerXXX" -offset indent
|
||
|
|
.It Sy Third level name Type Changeable
|
||
|
|
.It kern.tkstat.cancc quad no
|
||
|
|
.It kern.tkstat.nin quad no
|
||
|
|
.It kern.tkstat.nout quad no
|
||
|
|
.It kern.tkstat.rawcc quad no
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
The variables are as follows:
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li kern.tkstat.cancc ( KERN_TKSTAT_CANCC )
|
||
|
|
The number of canonical input characters.
|
||
|
|
.It Li kern.tkstat.nin ( KERN_TKSTAT_NIN )
|
||
|
|
The total number of input characters.
|
||
|
|
.It Li kern.tkstat.nout ( KERN_TKSTAT_NOUT )
|
||
|
|
The total number of output characters.
|
||
|
|
.It Li kern.tkstat.rawcc ( KERN_TKSTAT_RAWCC )
|
||
|
|
The number of raw input characters.
|
||
|
|
.El
|
||
|
|
.It Li kern.urandom ( KERN_URND )
|
||
|
|
Random integer value.
|
||
|
|
.It Li kern.veriexec
|
||
|
|
Tunings for Verixec.
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li kern.veriexec.algorithms
|
||
|
|
Returns a string with the supported algorithms in Veriexec.
|
||
|
|
.It Li kern.veriexec.count
|
||
|
|
Sub-nodes are added to this node as new mounts are monitored by Veriexec.
|
||
|
|
Each mount will be under its own
|
||
|
|
.No tableN
|
||
|
|
node.
|
||
|
|
Under each node there will be three variables, indicating the mount
|
||
|
|
point, the file-system type, and the number of entries.
|
||
|
|
.It Li kern.veriexec.strict
|
||
|
|
Controls the strict level of Veriexec.
|
||
|
|
See
|
||
|
|
.Xr security 8
|
||
|
|
for more information on each level's implications.
|
||
|
|
.It Li kern.veriexec.verbose
|
||
|
|
Controls the verbosity level of Veriexec.
|
||
|
|
If 0, only the minimal
|
||
|
|
indication required will be given about what's happening - fingerprint
|
||
|
|
mismatches, removal of entries from the tables, modification of a
|
||
|
|
fingerprinted file.
|
||
|
|
If 1, more messages will be printed (ie., when a file with a valid
|
||
|
|
fingerprint is accessed).
|
||
|
|
Verbose level 2 is debug mode.
|
||
|
|
.El
|
||
|
|
.It Li kern.version ( KERN_VERSION )
|
||
|
|
The system version string.
|
||
|
|
.It Li kern.vnode ( KERN_VNODE )
|
||
|
|
Return the entire vnode table.
|
||
|
|
Note, the vnode table is not necessarily a consistent snapshot of
|
||
|
|
the system.
|
||
|
|
The returned data consists of an array whose size depends on the
|
||
|
|
current number of such objects in the system.
|
||
|
|
Each element of the array contains the kernel address of a vnode
|
||
|
|
.Va struct vnode *
|
||
|
|
followed by the vnode itself
|
||
|
|
.Va struct vnode .
|
||
|
|
.It Li kern.coredump.setid
|
||
|
|
Settings related to set-id processes coredumps.
|
||
|
|
By default, set-id processes do not dump core in situations where
|
||
|
|
other processes would.
|
||
|
|
The settings in this node allows an administrator to change this
|
||
|
|
behavior.
|
||
|
|
.Pp
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li kern.coredump.setid.dump
|
||
|
|
If non-zero, set-id processes will dump core.
|
||
|
|
.It Li kern.coredump.setid.group
|
||
|
|
The group-id for the set-id processes' coredump.
|
||
|
|
.It Li kern.coredump.setid.mode
|
||
|
|
The mode for the set-id processes' coredump.
|
||
|
|
See
|
||
|
|
.Xr chmod 1 .
|
||
|
|
.It Li kern.coredump.setid.owner
|
||
|
|
The user-id that will be used as the owner of the set-id processes'
|
||
|
|
coredump.
|
||
|
|
.It Li kern.coredump.setid.path
|
||
|
|
The path to which set-id processes' coredumps will be saved to.
|
||
|
|
Same syntax as kern.defcorename.
|
||
|
|
.El
|
||
|
|
.\" XXX kern.lwp
|
||
|
|
.El
|
||
|
|
.Sh The machdep.* subtree
|
||
|
|
The set of variables defined is architecture dependent.
|
||
|
|
Most architectures define at least the following variables.
|
||
|
|
.Bl -column "CONSOLE_DEVICEXXX" "integerXXX" -offset indent
|
||
|
|
.It Sy Second level name Type Changeable
|
||
|
|
.It Li CPU_CONSDEV dev_t no
|
||
|
|
.El
|
||
|
|
.Sh The net.* subtree
|
||
|
|
The string and integer information available for the
|
||
|
|
.Li net
|
||
|
|
level is detailed below.
|
||
|
|
The changeable column shows whether a process with appropriate
|
||
|
|
privilege may change the value.
|
||
|
|
The second and third levels are typically the protocol family and
|
||
|
|
protocol number, though this is not always the case.
|
||
|
|
.Bl -column "Second level nameX" "IPsec key management valuesX" -offset indent
|
||
|
|
.It Sy Second level name Type Changeable
|
||
|
|
.It net.route routing messages no
|
||
|
|
.It net.inet IPv4 values yes
|
||
|
|
.It net.inet6 IPv6 values yes
|
||
|
|
.It net.key IPsec key management values yes
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li net.route ( PF_ROUTE )
|
||
|
|
.\" XXX really?
|
||
|
|
Return the entire routing table or a subset of it.
|
||
|
|
The data is returned as a sequence of routing messages (see
|
||
|
|
.Xr route 4
|
||
|
|
for the header file, format and meaning).
|
||
|
|
The length of each message is contained in the message header.
|
||
|
|
.Pp
|
||
|
|
The third level name is a protocol number, which is currently always 0.
|
||
|
|
The fourth level name is an address family, which may be set to 0 to
|
||
|
|
select all address families.
|
||
|
|
The fifth and sixth level names are as follows:
|
||
|
|
.Bl -column "Fifth level nameXXXXXX" "Sixth level is:XXX" -offset indent
|
||
|
|
.It Sy Fifth level name Sixth level is:
|
||
|
|
.It NET\_RT\_FLAGS rtflags
|
||
|
|
.It NET\_RT\_DUMP None
|
||
|
|
.It NET\_RT\_IFLIST None
|
||
|
|
.El
|
||
|
|
.It Li net.inet ( PF_INET )
|
||
|
|
Get or set various global information about the IPv4
|
||
|
|
.Pq Internet Protocol version 4 .
|
||
|
|
The third level name is the protocol.
|
||
|
|
The fourth level name is the variable name.
|
||
|
|
The currently defined protocols and names are:
|
||
|
|
.Bl -column "Protocol name" "sack.globalmaxholes" "integer" -offset 4n
|
||
|
|
.It Sy Protocol name Variable name Type Changeable
|
||
|
|
.It arp down integer yes
|
||
|
|
.It arp keep integer yes
|
||
|
|
.It arp prune integer yes
|
||
|
|
.It arp refresh integer yes
|
||
|
|
.It carp allow integer yes
|
||
|
|
.It carp preempt integer yes
|
||
|
|
.It carp log integer yes
|
||
|
|
.It carp arpbalance integer yes
|
||
|
|
.It icmp errppslimit integer yes
|
||
|
|
.It icmp maskrepl integer yes
|
||
|
|
.It icmp rediraccept integer yes
|
||
|
|
.It icmp redirtimeout integer yes
|
||
|
|
.It ip allowsrcrt integer yes
|
||
|
|
.It ip anonportmax integer yes
|
||
|
|
.It ip anonportmin integer yes
|
||
|
|
.It ip checkinterface integer yes
|
||
|
|
.It ip directed-broadcast integer yes
|
||
|
|
.It ip do_loopback_cksum integer yes
|
||
|
|
.It ip forwarding integer yes
|
||
|
|
.It ip forwsrcrt integer yes
|
||
|
|
.It ip gifttl integer yes
|
||
|
|
.It ip grettl integer yes
|
||
|
|
.It ip hostzerobroadcast integer yes
|
||
|
|
.It ip lowportmin integer yes
|
||
|
|
.It ip lowportmax integer yes
|
||
|
|
.It ip maxflows integer yes
|
||
|
|
.It ip maxfragpackets integer yes
|
||
|
|
.It ip mtudisc integer yes
|
||
|
|
.It ip mtudisctimeout integer yes
|
||
|
|
.It ip random_id integer yes
|
||
|
|
.It ip redirect integer yes
|
||
|
|
.It ip subnetsarelocal integer yes
|
||
|
|
.It ip ttl integer yes
|
||
|
|
.It tcp rfc1323 integer yes
|
||
|
|
.It tcp sendspace integer yes
|
||
|
|
.It tcp recvspace integer yes
|
||
|
|
.It tcp mssdflt integer yes
|
||
|
|
.It tcp syn_cache_limit integer yes
|
||
|
|
.It tcp syn_bucket_limit integer yes
|
||
|
|
.It tcp syn_cache_interval integer yes
|
||
|
|
.It tcp init_win integer yes
|
||
|
|
.It tcp init_win_local integer yes
|
||
|
|
.It tcp mss_ifmtu integer yes
|
||
|
|
.It tcp win_scale integer yes
|
||
|
|
.It tcp timestamps integer yes
|
||
|
|
.It tcp compat_42 integer yes
|
||
|
|
.It tcp cwm integer yes
|
||
|
|
.It tcp cwm_burstsize integer yes
|
||
|
|
.It tcp ack_on_push integer yes
|
||
|
|
.It tcp keepidle integer yes
|
||
|
|
.It tcp keepintvl integer yes
|
||
|
|
.It tcp keepcnt integer yes
|
||
|
|
.It tcp slowhz integer no
|
||
|
|
.It tcp log_refused integer yes
|
||
|
|
.It tcp rstppslimit integer yes
|
||
|
|
.It tcp ident struct no
|
||
|
|
.It tcp sack.enable integer yes
|
||
|
|
.It tcp sack.globalholes integer no
|
||
|
|
.It tcp sack.globalmaxholes integer yes
|
||
|
|
.It tcp sack.maxholes integer yes
|
||
|
|
.It tcp ecn.enable integer yes
|
||
|
|
.It tcp ecn.maxretries integer yes
|
||
|
|
.It tcp congctl.selected string yes
|
||
|
|
.It tcp congctl.available string yes
|
||
|
|
.It tcp abc.enable integer yes
|
||
|
|
.It tcp abc.aggressive integer yes
|
||
|
|
.It udp checksum integer yes
|
||
|
|
.It udp do_loopback_cksum integer yes
|
||
|
|
.It udp recvspace integer yes
|
||
|
|
.It udp sendspace integer yes
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
The variables are as follows:
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li arp.down
|
||
|
|
Failed ARP entry lifetime.
|
||
|
|
.It Li arp.keep
|
||
|
|
Valid ARP entry lifetime.
|
||
|
|
.It Li arp.prune
|
||
|
|
ARP cache pruning interval.
|
||
|
|
.It Li arp.refresh
|
||
|
|
ARP entry refresh interval.
|
||
|
|
.It Li carp.allow
|
||
|
|
If set to 0, incoming
|
||
|
|
.Xr carp 4
|
||
|
|
packets will not be processed.
|
||
|
|
If set to any other value, processing will occur.
|
||
|
|
Enabled by default.
|
||
|
|
.It Li carp.arpbalance
|
||
|
|
If set to any value other than 0, the ARP balancing functionality of
|
||
|
|
.Xr carp 4
|
||
|
|
is enabled.
|
||
|
|
When ARP requests are received for an IP address which is part of any virtual
|
||
|
|
host, carp will hash the source IP in the ARP request to select one of the
|
||
|
|
virtual hosts from the set of all the virtual hosts which have that IP address.
|
||
|
|
The master of that host will respond with the correct virtual MAC address.
|
||
|
|
Disabled by default.
|
||
|
|
.It Li carp.log
|
||
|
|
If set to any value other than 0,
|
||
|
|
.Xr carp 4
|
||
|
|
will log errors.
|
||
|
|
Disabled by default.
|
||
|
|
.It Li carp.preempt
|
||
|
|
If set to 0,
|
||
|
|
.Xr carp 4
|
||
|
|
will not attempt to become master if it is receiving advertisements from
|
||
|
|
another active master.
|
||
|
|
If set to any other value, carp will become master of the virtual host if it
|
||
|
|
believes it can send advertisements more frequently than the current master.
|
||
|
|
Disabled by default.
|
||
|
|
.It Li ip.allowsrcrt
|
||
|
|
If set to 1, the host accepts source routed packets.
|
||
|
|
.It Li ip.anonportmax
|
||
|
|
The highest port number to use for TCP and UDP ephemeral port allocation.
|
||
|
|
This cannot be set to less than 1024 or greater than 65535, and must
|
||
|
|
be greater than
|
||
|
|
.Li ip.anonportmin .
|
||
|
|
.It Li ip.anonportmin
|
||
|
|
The lowest port number to use for TCP and UDP ephemeral port allocation.
|
||
|
|
This cannot be set to less than 1024 or greater than 65535.
|
||
|
|
.It Li ip.checkinterface
|
||
|
|
If set to non-zero, the host will reject packets addressed to it
|
||
|
|
that arrive on an interface not bound to that address.
|
||
|
|
Currently, this must be disabled if ipnat is used to translate the
|
||
|
|
destination address to another local interface, or if addresses
|
||
|
|
are added to the loopback interface instead of the interface where
|
||
|
|
the packets for those packets are received.
|
||
|
|
.It Li ip.directed-broadcast
|
||
|
|
If set to 1, enables directed broadcast behavior for the host.
|
||
|
|
.It Li ip.do_loopback_cksum
|
||
|
|
Perform IP checksum on loopback.
|
||
|
|
.It Li ip.forwarding
|
||
|
|
If set to 1, enables IP forwarding for the host,
|
||
|
|
meaning that the host is acting as a router.
|
||
|
|
.It Li ip.forwsrcrt
|
||
|
|
If set to 1, enables forwarding of source-routed packets for the host.
|
||
|
|
This value may only be changed if the kernel security level is less than 1.
|
||
|
|
.It Li ip.gifttl
|
||
|
|
The maximum time-to-live (hop count) value for an IPv4 packet generated by
|
||
|
|
.Xr gif 4
|
||
|
|
tunnel interface.
|
||
|
|
.It Li ip.grettl
|
||
|
|
The maximum time-to-live (hop count) value for an IPv4 packet generated by
|
||
|
|
.Xr gre 4
|
||
|
|
tunnel interface.
|
||
|
|
.It Li ip.hostzerobroadcast
|
||
|
|
All zeroes address is broadcast address.
|
||
|
|
.It Li ip.lowportmax
|
||
|
|
The highest port number to use for TCP and UDP reserved port allocation.
|
||
|
|
This cannot be set to less than 0 or greater than 1024, and must
|
||
|
|
be greater than
|
||
|
|
.Li ip.lowportmin .
|
||
|
|
.It Li ip.lowportmin
|
||
|
|
The lowest port number to use for TCP and UDP reserved port allocation.
|
||
|
|
This cannot be set to less than 0 or greater than 1024, and must
|
||
|
|
be smaller than
|
||
|
|
.Li ip.lowportmax .
|
||
|
|
.It Li ip.maxflows
|
||
|
|
IP Fast Forwarding is enabled by default.
|
||
|
|
If set to 0, IP Fast Forwarding is disabled.
|
||
|
|
.Li ip.maxflows
|
||
|
|
controls the maximum amount of flows which can be created.
|
||
|
|
The default value is 256.
|
||
|
|
.It Li ip.maxfragpackets
|
||
|
|
The maximum number of fragmented packets the node will accept.
|
||
|
|
0 means that the node will not accept any fragmented packets.
|
||
|
|
\-1 means that the node will accept as many fragmented packets as it receives.
|
||
|
|
The flag is provided basically for avoiding possible DoS attacks.
|
||
|
|
.It Li ip.mtudisc
|
||
|
|
If set to 1, enables Path MTU Discovery (RFC 1191).
|
||
|
|
When Path MTU Discovery is enabled, the transmitted TCP segment
|
||
|
|
size will be determined by the advertised maximum segment size
|
||
|
|
(MSS) from the remote end, as constrained by the path MTU.
|
||
|
|
If MTU Discovery is disabled, the transmitted segment size will
|
||
|
|
never be greater than
|
||
|
|
.Li tcp.mssdflt
|
||
|
|
(the local maximum segment size).
|
||
|
|
.It Li ip.mtudisctimeout
|
||
|
|
The number of seconds in which a route added by the Path MTU
|
||
|
|
Discovery engine will time out.
|
||
|
|
When the route times out, the Path
|
||
|
|
MTU Discovery engine will attempt to probe a larger path MTU.
|
||
|
|
.It Li ip.random_id
|
||
|
|
Assign random ip_id values.
|
||
|
|
.It Li ip.redirect
|
||
|
|
If set to 1, ICMP redirects may be sent by the host.
|
||
|
|
This option is ignored unless the host is routing IP packets,
|
||
|
|
and should normally be enabled on all systems.
|
||
|
|
.It Li ip.subnetsarelocal
|
||
|
|
If set to 1, subnets are to be considered local addresses.
|
||
|
|
.It Li ip.ttl
|
||
|
|
The maximum time-to-live (hop count) value for an IP packet sourced by
|
||
|
|
the system.
|
||
|
|
This value applies to normal transport protocols, not to ICMP.
|
||
|
|
.It Li icmp.errppslimit
|
||
|
|
The variable specifies the maximum number of outgoing ICMP error messages,
|
||
|
|
per second.
|
||
|
|
ICMP error messages that exceeded the value are subject to rate limitation
|
||
|
|
and will not go out from the node.
|
||
|
|
Negative value disables rate limitation.
|
||
|
|
.It Li icmp.maskrepl
|
||
|
|
If set to 1, ICMP network mask requests are to be answered.
|
||
|
|
.It Li icmp.rediraccept
|
||
|
|
If set to non-zero, the host will accept ICMP redirect packets.
|
||
|
|
Note that routers will never accept ICMP redirect packets,
|
||
|
|
and the variable is meaningful on IP hosts only.
|
||
|
|
.It Li icmp.redirtimeout
|
||
|
|
The variable specifies lifetime of routing entries generated by incoming
|
||
|
|
ICMP redirect.
|
||
|
|
This defaults to 600 seconds.
|
||
|
|
.It Li icmp.returndatabytes
|
||
|
|
Number of bytes to return in an ICMP error message.
|
||
|
|
.It Li tcp.ack_on_push
|
||
|
|
If set to 1, TCP is to immediately transmit an ACK upon reception of
|
||
|
|
a packet with PUSH set.
|
||
|
|
This can avoid losing a round trip time in some rare situations,
|
||
|
|
but has the caveat of potentially defeating TCP's delayed ACK algorithm.
|
||
|
|
Use of this option is generally not recommended, but
|
||
|
|
the variable exists in case your configuration really needs it.
|
||
|
|
.It Li tcp.compat_42
|
||
|
|
If set to 1, enables work-arounds for bugs in the 4.2BSD TCP implementation.
|
||
|
|
Use of this option is not recommended, although it may be
|
||
|
|
required in order to communicate with extremely old TCP implementations.
|
||
|
|
.It Li tcp.cwm
|
||
|
|
If set to 1, enables use of the Hughes/Touch/Heidemann Congestion Window
|
||
|
|
Monitoring algorithm.
|
||
|
|
This algorithm prevents line-rate bursts of packets that could
|
||
|
|
otherwise occur when data begins flowing on an idle TCP connection.
|
||
|
|
These line-rate bursts can contribute to network and router congestion.
|
||
|
|
This can be particularly useful on World Wide Web servers
|
||
|
|
which support HTTP/1.1, which has lingering connections.
|
||
|
|
.It Li tcp.cwm_burstsize
|
||
|
|
The Congestion Window Monitoring allowed burst size, in terms
|
||
|
|
of packet count.
|
||
|
|
.It Li tcp.delack_ticks
|
||
|
|
Number of ticks to delay sending an ACK.
|
||
|
|
.It Li tcp.do_loopback_cksum
|
||
|
|
Perform TCP checksum on loopback.
|
||
|
|
.It Li tcp.init_win
|
||
|
|
A value indicating the TCP initial congestion window.
|
||
|
|
If this value is 0, an auto-tuning algorithm designed to use an initial
|
||
|
|
window of approximately 4K bytes is in use.
|
||
|
|
Otherwise, this value indicates a fixed number of packets.
|
||
|
|
.It Li tcp.init_win_local
|
||
|
|
Like
|
||
|
|
.Li tcp.init_win ,
|
||
|
|
but used when communicating with hosts on a local network.
|
||
|
|
.It Li tcp.keepcnt
|
||
|
|
Number of keepalive probes sent before declaring a connection dead.
|
||
|
|
If set to zero, there is no limit;
|
||
|
|
keepalives will be sent until some kind of
|
||
|
|
response is received from the peer.
|
||
|
|
.It Li tcp.keepidle
|
||
|
|
Time a connection must be idle before keepalives are sent (if keepalives
|
||
|
|
are enabled for the connection).
|
||
|
|
See also tcp.slowhz.
|
||
|
|
.It Li tcp.keepintvl
|
||
|
|
Time after a keepalive probe is sent until, in the absence of any response,
|
||
|
|
another probe is sent.
|
||
|
|
See also tcp.slowhz.
|
||
|
|
.It Li tcp.log_refused
|
||
|
|
If set to 1, refused TCP connections to the host will be logged.
|
||
|
|
.It Li tcp.mss_ifmtu
|
||
|
|
If set to 1, TCP calculates the outgoing maximum segment size based on
|
||
|
|
the MTU of the appropriate interface.
|
||
|
|
If set to 0, it is calculated based on the greater of the MTU of the
|
||
|
|
interface, and the largest (non-loopback) interface MTU on the system.
|
||
|
|
.It Li tcp.mssdflt
|
||
|
|
The default maximum segment size both advertised to the peer
|
||
|
|
and to use when either the peer does not advertise a maximum segment size to
|
||
|
|
us during connection setup or Path MTU Discovery
|
||
|
|
.Li ( ip.mtudisc )
|
||
|
|
is disabled.
|
||
|
|
Do not change this value unless you really know what you are doing.
|
||
|
|
.It Li tcp.newreno
|
||
|
|
If set to 1, enables the use of J.
|
||
|
|
Hoe's NewReno congestion control algorithm.
|
||
|
|
This algorithm improves the start-up behavior of TCP connections.
|
||
|
|
.It Li tcp.recvspace
|
||
|
|
The default TCP receive buffer size.
|
||
|
|
.It Li tcp.rfc1323
|
||
|
|
If set to 1, enables RFC 1323 extensions to TCP.
|
||
|
|
.It Li tcp.rstppslimit
|
||
|
|
The variable specifies the maximum number of outgoing TCP RST packets,
|
||
|
|
per second.
|
||
|
|
TCP RST packet that exceeded the value are subject to rate limitation
|
||
|
|
and will not go out from the node.
|
||
|
|
Negative value disables rate limitation.
|
||
|
|
.It Li tcp.sack.enable
|
||
|
|
If set to 1, enables RFC 2018 Selective ACKnowledgement.
|
||
|
|
.It Li tcp.sack.globalholes
|
||
|
|
Global number of TCP SACK holes.
|
||
|
|
.It Li tcp.sack.globalmaxholes
|
||
|
|
Global maximum number of TCP SACK holes.
|
||
|
|
.It Li tcp.sack.maxholes
|
||
|
|
Maximum number of TCP SACK holes allowed per connection.
|
||
|
|
.It Li tcp.ecn.enable
|
||
|
|
If set to 1, enables RFC 3168 Explicit Congestion Notification.
|
||
|
|
.It Li tcp.ecn.maxretries
|
||
|
|
Number of times to retry sending the ECN-setup packet.
|
||
|
|
.It Li tcp.sendspace
|
||
|
|
The default TCP send buffer size.
|
||
|
|
.It Li tcp.slowhz
|
||
|
|
The units for tcp.keepidle and tcp.keepintvl; those variables are in ticks
|
||
|
|
of a clock that ticks tcp.slowhz times per second.
|
||
|
|
(That is, their values
|
||
|
|
must be divided by the tcp.slowhz value to get times in seconds.)
|
||
|
|
.It Li tcp.syn_bucket_limit
|
||
|
|
The maximum number of entries allowed per hash bucket in the TCP
|
||
|
|
compressed state engine.
|
||
|
|
.It Li tcp.syn_cache_limit
|
||
|
|
The maximum number of entries allowed in the TCP compressed state
|
||
|
|
engine.
|
||
|
|
.It Li tcp.timestamps
|
||
|
|
If rfc1323 is enabled, a value of 1 indicates RFC 1323 time stamp options,
|
||
|
|
used for measuring TCP round trip times, are enabled.
|
||
|
|
.It Li tcp.win_scale
|
||
|
|
If rfc1323 is enabled, a value of 1 indicates RFC 1323 window scale options,
|
||
|
|
for increasing the TCP window size, are enabled.
|
||
|
|
.It Li tcp.congctl.available
|
||
|
|
The available TCP congestion control algorithms.
|
||
|
|
.It Li tcp.congctl.selected
|
||
|
|
The currently selected TCP congestion control algorithm.
|
||
|
|
.It Li tcp.abc.enable
|
||
|
|
If set to 1, use RFC 3465 Appropriate Byte Counting (ABC).
|
||
|
|
If set to 0, use traditional Packet Counting.
|
||
|
|
.It Li tcp.abc.aggressive
|
||
|
|
Choose the L parameter found in RFC 3465.
|
||
|
|
L is the maximum cwnd increase for an ack during slow start.
|
||
|
|
If set to 1, use L=2*SMSS.
|
||
|
|
If set to 0, use L=1*SMSS.
|
||
|
|
It has no effect unless tcp.abc.enable is set to 1.
|
||
|
|
.It Li udp.checksum
|
||
|
|
If set to 1, UDP checksums are being computed.
|
||
|
|
Received non-zero UDP checksums are always checked.
|
||
|
|
Disabling UDP checksums is strongly discouraged.
|
||
|
|
.It Li udp.sendspace
|
||
|
|
The default UDP send buffer size.
|
||
|
|
.It Li udp.recvspace
|
||
|
|
The default UDP receive buffer size.
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
For variables net.*.ipsec, please refer to
|
||
|
|
.Xr ipsec 4 .
|
||
|
|
.It Li net.inet6 ( PF_INET6 )
|
||
|
|
Get or set various global information about the IPv6
|
||
|
|
.Pq Internet Protocol version 6 .
|
||
|
|
The third level name is the protocol.
|
||
|
|
The fourth level name is the variable name.
|
||
|
|
The currently defined protocols and names are:
|
||
|
|
.Bl -column "Protocol name" "Variable nameXX" "integer" "yes" -offset indent
|
||
|
|
.It Sy Protocol name Variable name Type Changeable
|
||
|
|
.It icmp6 errppslimit integer yes
|
||
|
|
.It icmp6 mtudisc_hiwat integer yes
|
||
|
|
.It icmp6 mtudisc_lowat integer yes
|
||
|
|
.It icmp6 nd6_debug integer yes
|
||
|
|
.It icmp6 nd6_delay integer yes
|
||
|
|
.It icmp6 nd6_maxnudhint integer yes
|
||
|
|
.It icmp6 nd6_mmaxtries integer yes
|
||
|
|
.It icmp6 nd6_prune integer yes
|
||
|
|
.It icmp6 nd6_umaxtries integer yes
|
||
|
|
.It icmp6 nd6_useloopback integer yes
|
||
|
|
.It icmp6 nodeinfo integer yes
|
||
|
|
.It icmp6 rediraccept integer yes
|
||
|
|
.It icmp6 redirtimeout integer yes
|
||
|
|
.It ip6 accept_rtadv integer yes
|
||
|
|
.It ip6 anonportmax integer yes
|
||
|
|
.It ip6 anonportmin integer yes
|
||
|
|
.It ip6 auto_flowlabel integer yes
|
||
|
|
.It ip6 dad_count integer yes
|
||
|
|
.It ip6 defmcasthlim integer yes
|
||
|
|
.It ip6 forwarding integer yes
|
||
|
|
.It ip6 gifhlim integer yes
|
||
|
|
.It ip6 hlim integer yes
|
||
|
|
.It ip6 hdrnestlimit integer yes
|
||
|
|
.It ip6 kame_version string no
|
||
|
|
.It ip6 keepfaith integer yes
|
||
|
|
.It ip6 log_interval integer yes
|
||
|
|
.It ip6 lowportmax integer yes
|
||
|
|
.It ip6 lowportmin integer yes
|
||
|
|
.It ip6 maxfragpackets integer yes
|
||
|
|
.It ip6 maxfrags integer yes
|
||
|
|
.It ip6 redirect integer yes
|
||
|
|
.It ip6 rr_prune integer yes
|
||
|
|
.It ip6 use_deprecated integer yes
|
||
|
|
.It ip6 v6only integer yes
|
||
|
|
.It udp6 do_loopback_cksum integer yes
|
||
|
|
.It udp6 recvspace integer yes
|
||
|
|
.It udp6 sendspace integer yes
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
The variables are as follows:
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li ip6.accept_rtadv
|
||
|
|
If set to non-zero, the node will accept ICMPv6 router advertisement packets
|
||
|
|
and autoconfigures address prefixes and default routers.
|
||
|
|
The node must be a host
|
||
|
|
.Pq not a router
|
||
|
|
for the option to be meaningful.
|
||
|
|
.It Li ip6.anonportmax
|
||
|
|
The highest port number to use for TCP and UDP ephemeral port allocation.
|
||
|
|
This cannot be set to less than 1024 or greater than 65535, and must
|
||
|
|
be greater than
|
||
|
|
.Li ip6.anonportmin .
|
||
|
|
.It Li ip6.anonportmin
|
||
|
|
The lowest port number to use for TCP and UDP ephemeral port allocation.
|
||
|
|
This cannot be set to less than 1024 or greater than 65535.
|
||
|
|
.It Li ip6.auto_flowlabel
|
||
|
|
On connected transport protocol packets,
|
||
|
|
fill IPv6 flowlabel field to help intermediate routers to identify packet flows.
|
||
|
|
.It Li ip6.dad_count
|
||
|
|
The variable configures number of IPv6 DAD
|
||
|
|
.Pq duplicated address detection
|
||
|
|
probe packets.
|
||
|
|
The packets will be generated when IPv6 interface addresses are configured.
|
||
|
|
.It Li ip6.defmcasthlim
|
||
|
|
The default hop limit value for an IPv6 multicast packet sourced by the node.
|
||
|
|
This value applies to all the transport protocols on top of IPv6.
|
||
|
|
There are APIs to override the value, as documented in
|
||
|
|
.Xr ip6 4 .
|
||
|
|
.It Li ip6.forwarding
|
||
|
|
If set to 1, enables IPv6 forwarding for the node,
|
||
|
|
meaning that the node is acting as a router.
|
||
|
|
If set to 0, disables IPv6 forwarding for the node,
|
||
|
|
meaning that the node is acting as a host.
|
||
|
|
IPv6 specification defines node behavior for
|
||
|
|
.Dq router
|
||
|
|
case and
|
||
|
|
.Dq host
|
||
|
|
case quite differently, and changing this variable during operation
|
||
|
|
may cause serious trouble.
|
||
|
|
It is recommended to configure the variable at bootstrap time,
|
||
|
|
and bootstrap time only.
|
||
|
|
.It Li ip6.gifhlim
|
||
|
|
The maximum hop limit value for an IPv6 packet generated by
|
||
|
|
.Xr gif 4
|
||
|
|
tunnel interface.
|
||
|
|
.It Li ip6.hdrnestlimit
|
||
|
|
The number of IPv6 extension headers permitted on incoming IPv6 packets.
|
||
|
|
If set to 0, the node will accept as many extension headers as possible.
|
||
|
|
.It Li ip6.hlim
|
||
|
|
The default hop limit value for an IPv6 unicast packet sourced by the node.
|
||
|
|
This value applies to all the transport protocols on top of IPv6.
|
||
|
|
There are APIs to override the value, as documented in
|
||
|
|
.Xr ip6 4 .
|
||
|
|
.It Li ip6.kame_version
|
||
|
|
The string identifies the version of KAME IPv6 stack implemented in the kernel.
|
||
|
|
.It Li ip6.keepfaith
|
||
|
|
If set to non-zero, it enables
|
||
|
|
.Dq FAITH
|
||
|
|
TCP relay IPv6-to-IPv4 translator code in the kernel.
|
||
|
|
Refer
|
||
|
|
.Xr faith 4
|
||
|
|
and
|
||
|
|
.Xr faithd 8
|
||
|
|
for detail.
|
||
|
|
.It Li ip6.log_interval
|
||
|
|
The variable controls amount of logs generated by IPv6 packet
|
||
|
|
forwarding engine, by setting interval between log output
|
||
|
|
.Pq in seconds .
|
||
|
|
.It Li ip6.lowportmax
|
||
|
|
The highest port number to use for TCP and UDP reserved port allocation.
|
||
|
|
This cannot be set to less than 0 or greater than 1024, and must
|
||
|
|
be greater than
|
||
|
|
.Li ip6.lowportmin .
|
||
|
|
.It Li ip6.lowportmin
|
||
|
|
The lowest port number to use for TCP and UDP reserved port allocation.
|
||
|
|
This cannot be set to less than 0 or greater than 1024, and must
|
||
|
|
be smaller than
|
||
|
|
.Li ip6.lowportmax .
|
||
|
|
.It Li ip6.maxfragpackets
|
||
|
|
The maximum number of fragmented packets the node will accept.
|
||
|
|
0 means that the node will not accept any fragmented packets.
|
||
|
|
\-1 means that the node will accept as many fragmented packets as it receives.
|
||
|
|
The flag is provided basically for avoiding possible DoS attacks.
|
||
|
|
.It Li ip6.maxfrags
|
||
|
|
The maximum number of fragments the node will accept.
|
||
|
|
0 means that the node will not accept any fragments.
|
||
|
|
\-1 means that the node will accept as many fragments as it receives.
|
||
|
|
The flag is provided basically for avoiding possible DoS attacks.
|
||
|
|
.It Li ip6.redirect
|
||
|
|
If set to 1, ICMPv6 redirects may be sent by the node.
|
||
|
|
This option is ignored unless the node is routing IP packets,
|
||
|
|
and should normally be enabled on all systems.
|
||
|
|
.It Li ip6.rr_prune
|
||
|
|
The variable specifies interval between IPv6 router renumbering prefix
|
||
|
|
babysitting, in seconds.
|
||
|
|
.It Li ip6.use_deprecated
|
||
|
|
The variable controls use of deprecated address, specified in RFC 2462 5.5.4.
|
||
|
|
.It Li ip6.v6only
|
||
|
|
The variable specifies initial value for
|
||
|
|
.Dv IPV6_V6ONLY
|
||
|
|
socket option for
|
||
|
|
.Dv AF_INET6
|
||
|
|
socket.
|
||
|
|
Please refer to
|
||
|
|
.Xr ip6 4
|
||
|
|
for detail.
|
||
|
|
.It Li icmp6.errppslimit
|
||
|
|
The variable specifies the maximum number of outgoing ICMPv6 error messages,
|
||
|
|
per second.
|
||
|
|
ICMPv6 error messages that exceeded the value are subject to rate limitation
|
||
|
|
and will not go out from the node.
|
||
|
|
Negative value disables rate limitation.
|
||
|
|
.It Li icmp6.mtudisc_hiwat
|
||
|
|
.It Li icmp6.mtudisc_lowat
|
||
|
|
The variables define the maximum number of routing table entries,
|
||
|
|
created due to path MTU discovery
|
||
|
|
.Pq prevents denial-of-service attacks with ICMPv6 too big messages .
|
||
|
|
When IPv6 path MTU discovery happens, we keep path MTU information into
|
||
|
|
the routing table.
|
||
|
|
If the number of routing table entries exceed the value,
|
||
|
|
the kernel will not attempt to keep the path MTU information.
|
||
|
|
.Li icmp6.mtudisc_hiwat
|
||
|
|
is used when we have verified ICMPv6 too big messages.
|
||
|
|
.Li icmp6.mtudisc_lowat
|
||
|
|
is used when we have unverified ICMPv6 too big messages.
|
||
|
|
Verification is performed by using address/port pairs kept in connected pcbs.
|
||
|
|
Negative value disables the upper limit.
|
||
|
|
.It Li icmp6.nd6_debug
|
||
|
|
If set to non-zero, kernel IPv6 neighbor discovery code will generate
|
||
|
|
debugging messages.
|
||
|
|
The debug outputs are useful to diagnose IPv6 interoperability issues.
|
||
|
|
The flag must be set to 0 for normal operation.
|
||
|
|
.It Li icmp6.nd6_delay
|
||
|
|
The variable specifies
|
||
|
|
.Dv DELAY_FIRST_PROBE_TIME
|
||
|
|
timing constant in IPv6 neighbor discovery specification
|
||
|
|
.Pq RFC 2461 ,
|
||
|
|
in seconds.
|
||
|
|
.It Li icmp6.nd6_maxnudhint
|
||
|
|
IPv6 neighbor discovery permits upper layer protocols to supply reachability
|
||
|
|
hints, to avoid unnecessary neighbor discovery exchanges.
|
||
|
|
The variable defines the number of consecutive hints the neighbor discovery
|
||
|
|
layer will take.
|
||
|
|
For example, by setting the variable to 3, neighbor discovery layer
|
||
|
|
will take 3 consecutive hints in maximum.
|
||
|
|
After receiving 3 hints, neighbor discovery layer will perform
|
||
|
|
normal neighbor discovery process.
|
||
|
|
.It Li icmp6.nd6_mmaxtries
|
||
|
|
The variable specifies
|
||
|
|
.Dv MAX_MULTICAST_SOLICIT
|
||
|
|
constant in IPv6 neighbor discovery specification
|
||
|
|
.Pq RFC 2461 .
|
||
|
|
.It Li icmp6.nd6_prune
|
||
|
|
The variable specifies interval between IPv6 neighbor cache babysitting,
|
||
|
|
in seconds.
|
||
|
|
.It Li icmp6.nd6_umaxtries
|
||
|
|
The variable specifies
|
||
|
|
.Dv MAX_UNICAST_SOLICIT
|
||
|
|
constant in IPv6 neighbor discovery specification
|
||
|
|
.Pq RFC 2461 .
|
||
|
|
.It Li icmp6.nd6_useloopback
|
||
|
|
If set to non-zero, kernel IPv6 stack will use loopback interface for
|
||
|
|
local traffic.
|
||
|
|
.It Li icmp6.nodeinfo
|
||
|
|
The variable enables responses to ICMPv6 node information queries.
|
||
|
|
If you set the variable to 0, responses will not be generated for
|
||
|
|
ICMPv6 node information queries.
|
||
|
|
Since node information queries can have a security impact, it is
|
||
|
|
possible to fine tune which responses should be answered.
|
||
|
|
Two separate bits can be set.
|
||
|
|
.Bl -tag -width "12345"
|
||
|
|
.It 1
|
||
|
|
Respond to ICMPv6 FQDN queries, e.g.
|
||
|
|
.Li ping6 -w .
|
||
|
|
.It 2
|
||
|
|
Respond to ICMPv6 node addresses queries, e.g.
|
||
|
|
.Li ping6 -a .
|
||
|
|
.El
|
||
|
|
.It Li icmp6.rediraccept
|
||
|
|
If set to non-zero, the host will accept ICMPv6 redirect packets.
|
||
|
|
Note that IPv6 routers will never accept ICMPv6 redirect packets,
|
||
|
|
and the variable is meaningful on IPv6 hosts
|
||
|
|
.Pq non-router
|
||
|
|
only.
|
||
|
|
.It Li icmp6.redirtimeout
|
||
|
|
The variable specifies lifetime of routing entries generated by incoming
|
||
|
|
ICMPv6 redirect.
|
||
|
|
.It Li udp6.do_loopback_cksum
|
||
|
|
Perform UDP checksum on loopback.
|
||
|
|
.It Li udp6.recvspace
|
||
|
|
Default UDP receive buffer size.
|
||
|
|
.It Li udp6.sendspace
|
||
|
|
Default UDP send buffer size.
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
We reuse net.*.tcp for
|
||
|
|
.Tn TCP
|
||
|
|
over
|
||
|
|
.Tn IPv6 ,
|
||
|
|
and therefore we do not have variables net.*.tcp6.
|
||
|
|
Variables net.inet6.udp6 have identical meaning to net.inet.udp.
|
||
|
|
Please refer to
|
||
|
|
.Li PF_INET
|
||
|
|
section above.
|
||
|
|
For variables net.*.ipsec6, please refer to
|
||
|
|
.Xr ipsec 4 .
|
||
|
|
.It Li net.key ( PF_KEY )
|
||
|
|
Get or set various global information about the IPsec key management.
|
||
|
|
The third level name is the variable name.
|
||
|
|
The currently defined variable and names are:
|
||
|
|
.Bl -column "blockacq_lifetime" "integer" "yes" -offset indent
|
||
|
|
.It Sy Variable name Type Changeable
|
||
|
|
.It debug integer yes
|
||
|
|
.It spi_try integer yes
|
||
|
|
.It spi_min_value integer yes
|
||
|
|
.It spi_max_value integer yes
|
||
|
|
.It larval_lifetime integer yes
|
||
|
|
.It blockacq_count integer yes
|
||
|
|
.It blockacq_lifetime integer yes
|
||
|
|
.It esp_keymin integer yes
|
||
|
|
.It esp_auth integer yes
|
||
|
|
.It ah_keymin integer yes
|
||
|
|
.El
|
||
|
|
The variables are as follows:
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li debug
|
||
|
|
Turn on debugging message from within the kernel.
|
||
|
|
The value is a bitmap, as defined in
|
||
|
|
.Pa /usr/include/netkey/key_debug.h .
|
||
|
|
.It Li spi_try
|
||
|
|
The number of times the kernel will try to obtain an unique SPI
|
||
|
|
when it generates it from random number generator.
|
||
|
|
.It Li spi_min_value
|
||
|
|
Minimum SPI value when generating it within the kernel.
|
||
|
|
.It Li spi_max_value
|
||
|
|
Maximum SPI value when generating it within the kernel.
|
||
|
|
.It Li larval_lifetime
|
||
|
|
Lifetime for LARVAL SAD entries, in seconds.
|
||
|
|
.It Li blockacq_count
|
||
|
|
Number of ACQUIRE PF_KEY messages to be blocked after an ACQUIRE message.
|
||
|
|
It avoids flood of ACQUIRE PF_KEY from being sent from the kernel to the
|
||
|
|
key management daemon.
|
||
|
|
.It Li blockacq_lifetime
|
||
|
|
Lifetime of ACQUIRE PF_KEY message.
|
||
|
|
.It Li esp_keymin
|
||
|
|
Minimum ESP key length, in bits.
|
||
|
|
The value is used when the kernel creates proposal payload
|
||
|
|
on ACQUIRE PF_KEY message.
|
||
|
|
.It Li esp_auth
|
||
|
|
Whether ESP authentication should be used or not.
|
||
|
|
Non-zero value indicates that ESP authentication should be used.
|
||
|
|
The value is used when the kernel creates proposal payload
|
||
|
|
on ACQUIRE PF_KEY message.
|
||
|
|
.It Li ah_keymin
|
||
|
|
Minimum AH key length, in bits,
|
||
|
|
The value is used when the kernel creates proposal payload
|
||
|
|
on ACQUIRE PF_KEY message.
|
||
|
|
.El
|
||
|
|
.El
|
||
|
|
.Sh The proc.* subtree
|
||
|
|
The string and integer information available for the
|
||
|
|
.Li proc
|
||
|
|
level is detailed below.
|
||
|
|
The changeable column shows whether a process with appropriate
|
||
|
|
privilege may change the value.
|
||
|
|
These values are per-process,
|
||
|
|
and as such may change from one process to another.
|
||
|
|
When a process is created,
|
||
|
|
the default values are inherited from its parent.
|
||
|
|
When a set-user-ID or set-group-ID binary is executed, the
|
||
|
|
value of PROC_PID_CORENAME is reset to the system default value.
|
||
|
|
The second level name is either the magic value PROC_CURPROC, which
|
||
|
|
points to the current process, or the PID of the target process.
|
||
|
|
.Bl -column "USER_COLL_WEIGHTS_MAXXXX" "integerXXX" "yes" -offset indent
|
||
|
|
.It Sy Third level name Type Changeable
|
||
|
|
.It proc.pid.corename string yes
|
||
|
|
.It proc.pid.rlimit node not applicable
|
||
|
|
.It proc.pid.stopfork int yes
|
||
|
|
.It proc.pid.stopexec int yes
|
||
|
|
.It proc.pid.stopexit int yes
|
||
|
|
.El
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.Pp
|
||
|
|
.It Li proc.pid.corename ( PROC_PID_CORENAME )
|
||
|
|
The template used for the core dump file name (see
|
||
|
|
.Xr core 5
|
||
|
|
for details).
|
||
|
|
The base name must either be
|
||
|
|
.Nm core
|
||
|
|
or end with the suffix ``.core'' (the super-user may set arbitrary names).
|
||
|
|
By default it points to KERN_DEFCORENAME.
|
||
|
|
.It Li proc.pid.rlimit ( PROC_PID_LIMIT )
|
||
|
|
Return resources limits, as defined for the
|
||
|
|
.Xr getrlimit 2
|
||
|
|
and
|
||
|
|
.Xr setrlimit 2
|
||
|
|
system calls.
|
||
|
|
The fourth level name is one of:
|
||
|
|
.Bl -tag -width PROC_PID_LIMIT_MEMLOCKAA
|
||
|
|
.It Li proc.pid.rlimit.cputime ( PROC_PID_LIMIT_CPU )
|
||
|
|
The maximum amount of CPU time (in seconds) to be used by each process.
|
||
|
|
.It Li proc.pid.rlimit.filesize ( PROC_PID_LIMIT_FSIZE )
|
||
|
|
The largest size (in bytes) file that may be created.
|
||
|
|
.It Li proc.pid.rlimit.datasize ( PROC_PID_LIMIT_DATA )
|
||
|
|
The maximum size (in bytes) of the data segment for a process;
|
||
|
|
this defines how far a program may extend its break with the
|
||
|
|
.Xr sbrk 2
|
||
|
|
system call.
|
||
|
|
.It Li proc.pid.rlimit.stacksize ( PROC_PID_LIMIT_STACK )
|
||
|
|
The maximum size (in bytes) of the stack segment for a process;
|
||
|
|
this defines how far a program's stack segment may be extended.
|
||
|
|
Stack extension is performed automatically by the system.
|
||
|
|
.It Li proc.pid.rlimit.coredumpsize ( PROC_PID_LIMIT_CORE )
|
||
|
|
The largest size (in bytes)
|
||
|
|
.Pa core
|
||
|
|
file that may be created.
|
||
|
|
.It Li proc.pid.rlimit.memoryuse ( PROC_PID_LIMIT_RSS )
|
||
|
|
The maximum size (in bytes) to which a process's resident set size may
|
||
|
|
grow.
|
||
|
|
This imposes a limit on the amount of physical memory to be given to
|
||
|
|
a process; if memory is tight, the system will prefer to take memory
|
||
|
|
from processes that are exceeding their declared resident set size.
|
||
|
|
.It Li proc.pid.rlimit.memorylocked ( PROC_PID_LIMIT_MEMLOCK )
|
||
|
|
The maximum size (in bytes) which a process may lock into memory
|
||
|
|
using the
|
||
|
|
.Xr mlock 2
|
||
|
|
function.
|
||
|
|
.It Li proc.pid.rlimit.maxproc ( PROC_PID_LIMIT_NPROC )
|
||
|
|
The maximum number of simultaneous processes for this user id.
|
||
|
|
.It Li proc.pid.rlimit.descriptors ( PROC_PID_LIMIT_NOFILE )
|
||
|
|
The maximum number of open files for this process.
|
||
|
|
.\" XXX proc.pid.rlimit.sbsize
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
The fifth level name is one of
|
||
|
|
.Li soft ( PROC_PID_LIMIT_TYPE_SOFT ) or
|
||
|
|
.Li hard ( PROC_PID_LIMIT_TYPE_HARD ) ,
|
||
|
|
to select respectively the soft or hard limit.
|
||
|
|
Both are of type integer.
|
||
|
|
.It Li proc.pid.stopfork ( PROC_PID_STOPFORK )
|
||
|
|
If non zero, the process' children will be stopped after
|
||
|
|
.Xr fork 2
|
||
|
|
calls.
|
||
|
|
The children is created in the SSTOP state and is never scheduled
|
||
|
|
for running before being stopped.
|
||
|
|
This feature helps attaching a process with a debugger such as
|
||
|
|
.Xr gdb 1
|
||
|
|
before it had the opportunity to actually do anything.
|
||
|
|
.Pp
|
||
|
|
This value is inherited by the process's children, and it also
|
||
|
|
apply to emulation specific system calls that fork a new process, such as
|
||
|
|
.Fn sproc
|
||
|
|
or
|
||
|
|
.Fn clone .
|
||
|
|
.It Li proc.pid.stopexec ( PROC_PID_STOPEXEC )
|
||
|
|
If non zero, the process will be stopped on next
|
||
|
|
.Xr exec 3
|
||
|
|
call.
|
||
|
|
The process created by
|
||
|
|
.Xr exec 3
|
||
|
|
is created in the SSTOP state and is never scheduled for running
|
||
|
|
before being stopped.
|
||
|
|
This feature helps attaching a process with a debugger such as
|
||
|
|
.Xr gdb 1
|
||
|
|
before it had the opportunity to actually do anything.
|
||
|
|
.Pp
|
||
|
|
This value is inherited by the process's children.
|
||
|
|
.It Li proc.pid.stopexit ( PROC_PID_STOPEXIT )
|
||
|
|
If non zero, the process will be stopped on when it has cause to exit,
|
||
|
|
either by way of calling
|
||
|
|
.Xr exit 3 ,
|
||
|
|
.Xr _exit 2 ,
|
||
|
|
or by the receipt of a specific signal.
|
||
|
|
The process is stopped before any of its resources or vm space is
|
||
|
|
released allowing examination of the termination state of a process
|
||
|
|
before it disappears.
|
||
|
|
This feature can be used to examine the final conditions of the
|
||
|
|
process's vmspace via
|
||
|
|
.Xr pmap 1
|
||
|
|
or its resource settings with
|
||
|
|
.Xr sysctl 8
|
||
|
|
before it disappears.
|
||
|
|
.Pp
|
||
|
|
This value is also inherited by the process's children.
|
||
|
|
.El
|
||
|
|
.Sh The user.* subtree ( CTL_USER )
|
||
|
|
The string and integer information available for the
|
||
|
|
.Li user
|
||
|
|
level is detailed below.
|
||
|
|
The changeable column shows whether a process with appropriate
|
||
|
|
privilege may change the value.
|
||
|
|
.Bl -column "USER_COLL_WEIGHTS_MAXXXX" "integerXXX" -offset indent
|
||
|
|
.It Sy Second level name Type Changeable
|
||
|
|
.It user.atexit_max integer no
|
||
|
|
.It user.bc_base_max integer no
|
||
|
|
.It user.bc_dim_max integer no
|
||
|
|
.It user.bc_scale_max integer no
|
||
|
|
.It user.bc_string_max integer no
|
||
|
|
.It user.coll_weights_max integer no
|
||
|
|
.It user.cs_path string no
|
||
|
|
.It user.expr_nest_max integer no
|
||
|
|
.It user.line_max integer no
|
||
|
|
.It user.posix2_c_bind integer no
|
||
|
|
.It user.posix2_c_dev integer no
|
||
|
|
.It user.posix2_char_term integer no
|
||
|
|
.It user.posix2_fort_dev integer no
|
||
|
|
.It user.posix2_fort_run integer no
|
||
|
|
.It user.posix2_localedef integer no
|
||
|
|
.It user.posix2_sw_dev integer no
|
||
|
|
.It user.posix2_upe integer no
|
||
|
|
.It user.posix2_version integer no
|
||
|
|
.It user.re_dup_max integer no
|
||
|
|
.It user.stream_max integer no
|
||
|
|
.It user.stream_max integer no
|
||
|
|
.It user.tzname_max integer no
|
||
|
|
.El
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.Pp
|
||
|
|
.It Li user.atexit_max ( USER_ATEXIT_MAX )
|
||
|
|
The maximum number of functions that may be registered with
|
||
|
|
.Xr atexit 3 .
|
||
|
|
.It Li user.bc_base_max ( USER_BC_BASE_MAX )
|
||
|
|
The maximum ibase/obase values in the
|
||
|
|
.Xr bc 1
|
||
|
|
utility.
|
||
|
|
.It Li user.bc_dim_max ( USER_BC_DIM_MAX )
|
||
|
|
The maximum array size in the
|
||
|
|
.Xr bc 1
|
||
|
|
utility.
|
||
|
|
.It Li user.bc_scale_max ( USER_BC_SCALE_MAX )
|
||
|
|
The maximum scale value in the
|
||
|
|
.Xr bc 1
|
||
|
|
utility.
|
||
|
|
.It Li user.bc_string_max ( USER_BC_STRING_MAX )
|
||
|
|
The maximum string length in the
|
||
|
|
.Xr bc 1
|
||
|
|
utility.
|
||
|
|
.It Li user.coll_weights_max ( USER_COLL_WEIGHTS_MAX )
|
||
|
|
The maximum number of weights that can be assigned to any entry of
|
||
|
|
the LC_COLLATE order keyword in the locale definition file.
|
||
|
|
.It Li user.cs_path ( USER_CS_PATH )
|
||
|
|
Return a value for the
|
||
|
|
.Ev PATH
|
||
|
|
environment variable that finds all the standard utilities.
|
||
|
|
.It Li user.expr_nest_max ( USER_EXPR_NEST_MAX )
|
||
|
|
The maximum number of expressions that can be nested within
|
||
|
|
parenthesis by the
|
||
|
|
.Xr expr 1
|
||
|
|
utility.
|
||
|
|
.It Li user.line_max ( USER_LINE_MAX )
|
||
|
|
The maximum length in bytes of a text-processing utility's input
|
||
|
|
line.
|
||
|
|
.It Li user.posix2_char_term ( USER_POSIX2_CHAR_TERM )
|
||
|
|
Return 1 if the system supports at least one terminal type capable of
|
||
|
|
all operations described in POSIX 1003.2, otherwise 0.
|
||
|
|
.It Li user.posix2_c_bind ( USER_POSIX2_C_BIND )
|
||
|
|
Return 1 if the system's C-language development facilities support the
|
||
|
|
C-Language Bindings Option, otherwise 0.
|
||
|
|
.It Li user.posix2_c_dev ( USER_POSIX2_C_DEV )
|
||
|
|
Return 1 if the system supports the C-Language Development Utilities Option,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li user.posix2_fort_dev ( USER_POSIX2_FORT_DEV )
|
||
|
|
Return 1 if the system supports the FORTRAN Development Utilities Option,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li user.posix2_fort_run ( USER_POSIX2_FORT_RUN )
|
||
|
|
Return 1 if the system supports the FORTRAN Runtime Utilities Option,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li user.posix2_localedef ( USER_POSIX2_LOCALEDEF )
|
||
|
|
Return 1 if the system supports the creation of locales, otherwise 0.
|
||
|
|
.It Li user.posix2_sw_dev ( USER_POSIX2_SW_DEV )
|
||
|
|
Return 1 if the system supports the Software Development Utilities Option,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li user.posix2_upe ( USER_POSIX2_UPE )
|
||
|
|
Return 1 if the system supports the User Portability Utilities Option,
|
||
|
|
otherwise 0.
|
||
|
|
.It Li user.posix2_version ( USER_POSIX2_VERSION )
|
||
|
|
The version of POSIX 1003.2 with which the system attempts to comply.
|
||
|
|
.It Li user.re_dup_max ( USER_RE_DUP_MAX )
|
||
|
|
The maximum number of repeated occurrences of a regular expression
|
||
|
|
permitted when using interval notation.
|
||
|
|
.ne 1i
|
||
|
|
.It Li user.stream_max ( USER_STREAM_MAX )
|
||
|
|
The minimum maximum number of streams that a process may have open
|
||
|
|
at any one time.
|
||
|
|
.It Li user.tzname_max ( USER_TZNAME_MAX )
|
||
|
|
The minimum maximum number of types supported for the name of a
|
||
|
|
timezone.
|
||
|
|
.El
|
||
|
|
.Sh The vm.* subtree ( CTL_VM )
|
||
|
|
The string and integer information available for the
|
||
|
|
.Li vm
|
||
|
|
level is detailed below.
|
||
|
|
The changeable column shows whether a process with appropriate
|
||
|
|
privilege may change the value.
|
||
|
|
.Bl -column "Second level nameXXXXXX" "struct uvmexp_sysctlXXX" -offset indent
|
||
|
|
.It Sy Second level name Type Changeable
|
||
|
|
.It vm.anonmax int yes
|
||
|
|
.It vm.anonmin int yes
|
||
|
|
.It vm.bufcache int yes
|
||
|
|
.It vm.bufmem int no
|
||
|
|
.It vm.bufmem_hiwater int yes
|
||
|
|
.It vm.bufmem_lowater int yes
|
||
|
|
.It vm.execmax int yes
|
||
|
|
.It vm.execmin int yes
|
||
|
|
.It vm.filemax int yes
|
||
|
|
.It vm.filemin int yes
|
||
|
|
.It vm.loadavg struct loadavg no
|
||
|
|
.It vm.maxslp int no
|
||
|
|
.It vm.nkmempages int no
|
||
|
|
.It vm.uspace int no
|
||
|
|
.It vm.uvmexp struct uvmexp no
|
||
|
|
.It vm.uvmexp2 struct uvmexp_sysctl no
|
||
|
|
.It vm.vmmeter struct vmtotal no
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li vm.anonmax ( VM_ANONMAX )
|
||
|
|
The percentage of physical memory which will be reclaimed
|
||
|
|
from other types of memory usage to store anonymous application data.
|
||
|
|
.It Li vm.anonmin ( VM_ANONMIN )
|
||
|
|
The percentage of physical memory which will be always be available for
|
||
|
|
anonymous application data.
|
||
|
|
.It Li vm.bufcache ( VM_BUFCACHE )
|
||
|
|
The percentage of physical memory which will be available
|
||
|
|
for the buffer cache.
|
||
|
|
.It Li vm.bufmem ( VM_BUFMEM )
|
||
|
|
The amount of kernel memory that is being used by the buffer cache.
|
||
|
|
.It Li vm.bufmem_lowater ( VM_BUFMEM_LOWATER )
|
||
|
|
The minimum amount of kernel memory to reserve for the
|
||
|
|
buffer cache.
|
||
|
|
.It Li vm.bufmem_hiwater ( VM_BUFMEM_HIWATER )
|
||
|
|
The maximum amount of kernel memory to be used for the
|
||
|
|
buffer cache.
|
||
|
|
.It Li vm.execmax ( VM_EXECMAX )
|
||
|
|
The percentage of physical memory which will be reclaimed
|
||
|
|
from other types of memory usage to store cached executable data.
|
||
|
|
.It Li vm.execmin ( VM_EXECMIN )
|
||
|
|
The percentage of physical memory which will be always be available for
|
||
|
|
cached executable data.
|
||
|
|
.It Li vm.filemax ( VM_FILEMAX )
|
||
|
|
The percentage of physical memory which will be reclaimed
|
||
|
|
from other types of memory usage to store cached file data.
|
||
|
|
.It Li vm.filemin ( VM_FILEMIN )
|
||
|
|
The percentage of physical memory which will be always be available for
|
||
|
|
cached file data.
|
||
|
|
.It Li vm.loadavg ( VM_LOADAVG )
|
||
|
|
Return the load average history.
|
||
|
|
The returned data consists of a
|
||
|
|
.Va struct loadavg .
|
||
|
|
.It Li vm.maxslp ( VM_MAXSLP )
|
||
|
|
The value of the maxslp kernel global variable.
|
||
|
|
.It Li vm.vmmeter ( VM_METER )
|
||
|
|
Return system wide virtual memory statistics.
|
||
|
|
The returned data consists of a
|
||
|
|
.Va struct vmtotal .
|
||
|
|
.It Li vm.uspace ( VM_USPACE )
|
||
|
|
The number of bytes allocated for each kernel stack.
|
||
|
|
.It Li vm.uvmexp ( VM_UVMEXP )
|
||
|
|
Return system wide virtual memory statistics.
|
||
|
|
The returned data consists of a
|
||
|
|
.Va struct uvmexp .
|
||
|
|
.It Li vm.uvmexp2 ( VM_UVMEXP2 )
|
||
|
|
Return system wide virtual memory statistics.
|
||
|
|
The returned data consists of a
|
||
|
|
.Va struct uvmexp_sysctl .
|
||
|
|
.\" XXX vm.idlezero
|
||
|
|
.El
|
||
|
|
.Sh The ddb.* subtree ( CTL_DDB )
|
||
|
|
The integer information available for the
|
||
|
|
.Li ddb
|
||
|
|
level is detailed below.
|
||
|
|
The changeable column shows whether a process with appropriate
|
||
|
|
privilege may change the value.
|
||
|
|
.\" XXX sort
|
||
|
|
.Bl -column "ddb.fromconsoleXXX" "integerXXX" -offset indent
|
||
|
|
.It Sy Second level name Type Changeable
|
||
|
|
.It ddb.radix integer yes
|
||
|
|
.It ddb.maxoff integer yes
|
||
|
|
.It ddb.lines integer yes
|
||
|
|
.It ddb.tabstops integer yes
|
||
|
|
.It ddb.onpanic integer yes
|
||
|
|
.It ddb.fromconsole integer yes
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li ddb.radix ( DBCTL_RADIX )
|
||
|
|
The input and output radix.
|
||
|
|
.It Li ddb.maxoff ( DBCTL_MAXOFF )
|
||
|
|
The maximum symbol offset.
|
||
|
|
.It Li ddb.lines ( DBCTL_LINES )
|
||
|
|
Number of display lines.
|
||
|
|
.It Li ddb.tabstops ( DBCTL_TABSTOPS )
|
||
|
|
Tab width.
|
||
|
|
.It Li ddb.onpanic ( DBCTL_ONPANIC )
|
||
|
|
If non-zero, DDB will be entered when the kernel panics.
|
||
|
|
.It Li ddb.fromconsole ( DBCTL_FROMCONSOLE )
|
||
|
|
If not zero, DDB may be entered by sending a break on a serial
|
||
|
|
console or by a special key sequence on a graphics console.
|
||
|
|
.\" XXX tee_msgbuf maxwidth commandonenter
|
||
|
|
.El
|
||
|
|
.Pp
|
||
|
|
These MIB nodes are also available as variables from within the DDB.
|
||
|
|
See
|
||
|
|
.Xr ddb 4
|
||
|
|
for more details.
|
||
|
|
.Sh The security.* subtree ( CTL_SECURITY )
|
||
|
|
The
|
||
|
|
.Li security
|
||
|
|
level contains various security-related settings for
|
||
|
|
the system. Available settings are detailed below.
|
||
|
|
.Pp
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li security.curtain
|
||
|
|
If non-zero, will filter return objects according to the user-id
|
||
|
|
requesting information about them, preventing from users any
|
||
|
|
access to objects they don't own.
|
||
|
|
.Pp
|
||
|
|
At the moment, it affects
|
||
|
|
.Xr ps 1 ,
|
||
|
|
.Xr netstat 1
|
||
|
|
(for
|
||
|
|
.Dv PF_INET ,
|
||
|
|
.Dv PF_INET6 ,
|
||
|
|
and
|
||
|
|
.Dv PF_UNIX
|
||
|
|
PCBs), and
|
||
|
|
.Xr w 1 .
|
||
|
|
.It Li security.pax
|
||
|
|
Settings for PaX -- exploit mitigation features.
|
||
|
|
.Pp
|
||
|
|
.Bl -tag -width "123456"
|
||
|
|
.It Li security.pax.mprotect.enable
|
||
|
|
Enable PaX MPROTECT restrictions.
|
||
|
|
.Pp
|
||
|
|
These are
|
||
|
|
.Xr mprotect 2
|
||
|
|
restrictions to better enforce a W^X policy. The value of this
|
||
|
|
knob must be non-zero for PaX MPROTECT to be enabled, even if a
|
||
|
|
program is set to explicit enable.
|
||
|
|
.It Li security.pax.mprotect.global
|
||
|
|
Specifies the default global policy for programs without an
|
||
|
|
explicit enable/disable flag.
|
||
|
|
.Pp
|
||
|
|
When non-zero, all programs will get the PaX MPROTECT restrictions,
|
||
|
|
except those exempted with
|
||
|
|
.Xr paxctl 1 .
|
||
|
|
Otherwise, all programs will not get the PaX MPROTECT restrictions,
|
||
|
|
except those specifically marked as such with
|
||
|
|
.Xr paxctl 1 .
|
||
|
|
.It Li security.pax.segvguard.enable
|
||
|
|
Enable PaX Segvguard.
|
||
|
|
.Pp
|
||
|
|
Please see
|
||
|
|
.Xr security 8
|
||
|
|
for more information.
|
||
|
|
.Pp
|
||
|
|
PaX Segvguard can detect and prevent certain exploitation attempts, where
|
||
|
|
an attacker may try for example to brute-force function return addresses
|
||
|
|
of respawning daemons.
|
||
|
|
.Pp
|
||
|
|
.Em Note :
|
||
|
|
The
|
||
|
|
.Nx
|
||
|
|
interface and implementation of the Segvguard is still experimental, and may
|
||
|
|
change in future releases.
|
||
|
|
.It Li security.pax.segvguard.global
|
||
|
|
Specifies the default global policy for programs without an
|
||
|
|
explicit enable/disable flag.
|
||
|
|
.Pp
|
||
|
|
When non-zero, all programs will get the PaX Segvguard,
|
||
|
|
except those exempted with
|
||
|
|
.Xr paxctl 1 .
|
||
|
|
Otherwise, all programs will not get the PaX Segvguard restrictions,
|
||
|
|
except those specifically marked as such with
|
||
|
|
.Xr paxctl 1 .
|
||
|
|
.It Li security.pax.segvguard.expiry_timeout
|
||
|
|
If the max number was not reached within this timeout (in seconds), the entry
|
||
|
|
will expire.
|
||
|
|
.It Li security.pax.segvguard.suspend_timeout
|
||
|
|
Number of seconds to suspend a user from running a faulting program when the
|
||
|
|
limit was exceeded.
|
||
|
|
.It Li security.pax.segvguard.max_crashes
|
||
|
|
Max number of segfaults a program can receive before suspension.
|
||
|
|
.El
|
||
|
|
.El
|
||
|
|
.Sh The vendor.* subtree ( CTL_VENDOR )
|
||
|
|
The
|
||
|
|
.Li vendor
|
||
|
|
toplevel name is reserved to be used by vendors who wish to
|
||
|
|
have their own private MIB tree.
|
||
|
|
Intended use is to store values under
|
||
|
|
.Dq vendor.\*[Lt]yourname\*[Gt].* .
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr sysctl 3 ,
|
||
|
|
.Xr ipsec 4 ,
|
||
|
|
.Xr tcp 4 ,
|
||
|
|
.Xr security 8 ,
|
||
|
|
.Xr sysctl 8
|
||
|
|
.Sh HISTORY
|
||
|
|
The
|
||
|
|
.Nm
|
||
|
|
variables first appeared in
|
||
|
|
.Bx 4.4 .
|