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Diff for /src/share/man/man7/sysctl.7 between version 1.83 and 1.101

version 1.83, 2014/06/13 22:06:00

version 1.101, 2016/05/25 20:47:57

Line 29

.\"

.\" @(#)sysctl.3 8.4 (Berkeley) 5/9/95

.\"

.Dd June 13, 2014

.Dd May 25, 2016

.Dt SYSCTL 7

.Os

.Sh NAME

Line 132 See

for more information.

.Ss The vfs.* subtree

A distinguished second level name,

.Li vfs.generic ( VFS_GENERIC ) ,

.Li vfs.generic ( Dv VFS_GENERIC ) ,

is used to get general information about all file systems.

It has the following third level identifiers:

.Bl -tag -width "123456"

.It Li vfs.generic.maxtypenum ( VFS_MAXTYPENUM )

.It Li vfs.generic.maxtypenum ( Dv VFS_MAXTYPENUM )

The highest valid file system type number.

.It Li vfs.generic.conf ( VFS_CONF )

.It Li vfs.generic.conf ( Dv VFS_CONF )

Returns configuration information about the file system type given as a fourth

level identifier.

.It Li vfs.generic.usermount ( VFS_USERMOUNT )

.It Li vfs.generic.usermount ( Dv VFS_USERMOUNT )

Determines if non superuser mounts are allowed, defaults to

.Dv 0 .

.It Li vfs.generic.magiclinks ( VFS_MAGICLINKS )

.It Li vfs.generic.magiclinks ( Dv VFS_MAGICLINKS )

Controls if expansion of variables is going to be performed on pathnames

or not.

Defaults to no variable expansion,

Line 188 level is detailed below.

The changeable column shows whether a process with appropriate

privilege may change the value.

.Bl -column "hw.machine_arch" "integer" "Changeable" -offset indent

.It Sy Second level name Type Changeable

.It Sy Second level name Sy Type Sy Changeable

.It hw.alignbytes integer no

.It hw.byteorder integer no

.It hw.cnmagic string yes

Line 198 privilege may change the value.

.It hw.machine_arch string no

.It hw.model string no

.It hw.ncpu integer no

.It hw.ncpuonline 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 )

.It Li hw.alignbytes ( Dv HW_ALIGNBYTES )

Alignment constraint for all possible data types.

This shows the value

.Dv ALIGNBYTES

.In machine/param.h ,

at the kernel compilation time.

.It Li hw.byteorder ( HW_BYTEORDER )

.It Li hw.byteorder ( Dv HW_BYTEORDER )

The byteorder (4321, or 1234).

.It Li hw.cnmagic ( HW_CNMAGIC )

.It Li hw.cnmagic ( Dv HW_CNMAGIC )

The console magic key sequence.

.It Li hw.disknames ( HW_DISKNAMES )

.It Li hw.disknames ( Dv HW_DISKNAMES )

The list of (space separated) disk device names on the system.

.It Li hw.iostatnames ( HW_IOSTATNAMES )

.It Li hw.iostatnames ( Dv HW_IOSTATNAMES )

A space separated list of devices that will have I/O statistics

collected on them.

.It Li hw.iostats ( HW_IOSTATS )

.It Li hw.iostats ( Dv HW_IOSTATS )

Return statistical information on the NFS mounts, disk and tape

devices on the system.

An array of

Line 242 Which can be

(tape drive), or

.Dv IOSTAT_NFS

(NFS mount).

.It Li hw.machine ( HW_MACHINE )

.It Li hw.machine ( Dv HW_MACHINE )

The machine class.

.It Li hw.machine_arch ( HW_MACHINE_ARCH )

.It Li hw.machine_arch ( Dv HW_MACHINE_ARCH )

The machine CPU class.

.It Li hw.model ( HW_MODEL )

.It Li hw.model ( Dv HW_MODEL )

The machine model.

.It Li hw.ncpu ( HW_NCPU )

.It Li hw.ncpu ( Dv HW_NCPU )

The number of CPUs.

The number of CPUs configured.

.It Li hw.pagesize ( HW_PAGESIZE )

.It Li hw.ncpuonline ( Dv HW_NCPUONLINE )

The number of CPUs online.

.It Li hw.pagesize ( Dv HW_PAGESIZE )

The software page size.

.It Li hw.physmem ( HW_PHYSMEM )

.It Li hw.physmem ( Dv HW_PHYSMEM )

The bytes of physical memory as a 32-bit integer.

.It Li hw.physmem64 ( HW_PHYSMEM64 )

.It Li hw.physmem64 ( Dv HW_PHYSMEM64 )

The bytes of physical memory as a 64-bit integer.

.It Li hw.usermem ( HW_USERMEM )

.It Li hw.usermem ( Dv HW_USERMEM )

The bytes of non-kernel memory as a 32-bit integer.

.It Li hw.usermem64 ( HW_USERMEM64 )

.It Li hw.usermem64 ( Dv HW_USERMEM64 )

The bytes of non-kernel memory as a 64-bit integer.

.El

.Ss The kern.* subtree

Line 270 The changeable column shows whether a pr

Line 272 The changeable column shows whether a pr

privilege may change the value.

.Bl -column "kern.posix_reader_writer_locks" \

"struct kinfo_drivers" "not applicable"

.It Sy Second level name Type Changeable

.It Sy Second level name Sy Type Sy Changeable

.It kern.aio_listio_max integer yes

.It kern.aio_max integer yes

.It kern.arandom integer no

.It kern.argmax integer no

.It kern.boothowto integer no

.It kern.boottime struct timeval no

.It kern.buildinfo string no

.\".It kern.bufq node not applicable

.It kern.ccpu integer no

.It kern.clockrate struct clockinfo no

Line 383 The used random number generator

Line 386 The used random number generator

.Pf ( Tn RNG )

is based on

.Xr arc4random 3 .

.It Li kern.argmax ( KERN_ARGMAX )

.It Li kern.argmax ( Dv KERN_ARGMAX )

The maximum bytes of argument to

.Xr execve 2 .

.It Li kern.boothowto

Flags passed from the boot loader; see

.Xr reboot 2

for the meanings of the flags.

.It Li kern.boottime ( KERN_BOOTTIME )

.It Li kern.boottime ( Dv KERN_BOOTTIME )

.Vt struct timeval

structure is returned.

This structure contains the time that the system was booted.

.It Li kern.buildinfo

When the kernel is built, the build environment may optionally provide

arbitrary information to be stored in this variable.

.\" .It Li kern.bufq

.\" XXX: Undocumented.

.It Li kern.ccpu ( KERN_CCPU )

.It Li kern.ccpu ( Dv KERN_CCPU )

The scheduler exponential decay value.

.It Li kern.clockrate ( KERN_CLOCKRATE )

.It Li kern.clockrate ( Dv KERN_CLOCKRATE )

.Vt struct clockinfo

structure is returned.

Line 409 skew rate.

Line 415 skew rate.

Refer to

.Xr hz 9

for additional details.

.It Li kern.consdev ( KERN_CONSDEV )

.It Li kern.consdev ( Dv KERN_CONSDEV )

Console device.

.It Li kern.coredump

Settings related to set-id processes coredumps.

Line 422 The third level name is

Line 428 The third level name is

.Dv kern.coredump.setid

and fourth level variables are described below.

.Bl -column "kern.coredump.setid.group" "integer" "Changeable" -offset indent

.It Sy Fourth level name Type Changeable

.It Sy Fourth level name Sy Type Sy Changeable

.It kern.coredump.setid.dump integer yes

.It kern.coredump.setid.group integer yes

.It kern.coredump.setid.mode integer yes

Line 445 coredump.

Line 451 coredump.

The path to which set-id processes' coredumps will be saved to.

Same syntax as kern.defcorename.

.El

.It Li kern.cp_id ( KERN_CP_ID )

.It Li kern.cp_id ( Dv KERN_CP_ID )

Mapping of CPU number to CPU id.

.It Li kern.cp_time ( KERN_CP_TIME )

.It Li kern.cp_time ( Dv KERN_CP_TIME )

Returns an array of

.Dv CPUSTATES

.Vt uint64_t Ns s.

.Vt uint64_t Ns s .

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

Line 472 non-accelerated transforms (handling the

Line 478 non-accelerated transforms (handling the

.It Dv \*[Gt] 0

Allow user requests only for transforms which are hardware-accelerated.

.El

.It Li kern.defcorename ( KERN_DEFCORENAME )

.It Li kern.defcorename ( Dv KERN_DEFCORENAME )

Default template for the name of core dump files (see also

.Li proc.pid.corename

in the per-process variables

Line 489 and can be changed with the kernel confi

Line 495 and can be changed with the kernel confi

.It Li kern.detachall

Detach all devices at shutdown.

.It Li kern.domainname ( KERN_DOMAINNAME )

.It Li kern.domainname ( Dv KERN_DOMAINNAME )

Get or set the YP domain name.

.It Li kern.drivers ( KERN_DRIVERS )

.It Li kern.drivers ( Dv KERN_DRIVERS )

Return an array of

.Vt struct kinfo_drivers

that contains the name and major device numbers of all the device drivers

Line 502 field is always a NUL terminated string.

Line 508 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.dump_on_panic ( KERN_DUMP_ON_PANIC )

.It Li kern.dump_on_panic ( Dv KERN_DUMP_ON_PANIC )

Perform a crash dump on system

.Xr panic 9 .

.It Li kern.file ( KERN_FILE )

.It Li kern.file ( Dv KERN_FILE )

Return the entire file table.

The returned data consists of a single

.Vt struct filelist

followed by an array of

.Vt struct file ,

whose size depends on the current number of such objects in the system.

.It Li kern.forkfsleep ( KERN_FORKFSLEEP )

.It Li kern.forkfsleep ( Dv KERN_FORKFSLEEP )

.Xr fork 2

system call fails due to limit on number of processes (either

Line 523 error to process.

Line 529 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 )

.It Li kern.fscale ( Dv KERN_FSCALE )

The kernel fixed-point scale factor.

.It Li kern.fsync ( KERN_FSYNC )

.It Li kern.fsync ( Dv KERN_FSYNC )

Return 1 if the

.St -p1003.1b-93

File Synchronization Option is available

on this system,

otherwise\ 0.

.It Li kern.hardclock_ticks ( KERN_HARDCLOCK_TICKS )

.It Li kern.hardclock_ticks ( Dv KERN_HARDCLOCK_TICKS )

Returns the number of

.Xr hardclock 9

ticks.

.It Li kern.hostid ( KERN_HOSTID )

.It Li kern.hostid ( Dv KERN_HOSTID )

Get or set the host identifier.

This is aimed to replace the legacy

.Xr gethostid 3

and

.Xr sethostid 3

system calls.

.It Li kern.hostname ( KERN_HOSTNAME )

.It Li kern.hostname ( Dv KERN_HOSTNAME )

Get or set the

.Xr hostname 1 .

.It Li kern.iov_max ( KERN_IOV_MAX )

.It Li kern.iov_max ( Dv KERN_IOV_MAX )

Return the maximum number of

.Vt iovec

structures that a process has available for use with

Line 556 structures that a process has available

Line 562 structures that a process has available

.Xr sendmsg 2

and

.Xr writev 2 .

.It Li kern.ipc ( KERN_SYSVIPC )

.It Li kern.ipc ( Dv KERN_SYSVIPC )

Return information about the SysV IPC parameters.

The third level names for the ipc variables are detailed below.

.Bl -column "kern.ipc.shm_use_phys" "integer" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It kern.ipc.sysvmsg integer no

.It kern.ipc.sysvsem integer no

.It kern.ipc.sysvshm integer no

Line 577 The third level names for the ipc variab

Line 583 The third level names for the ipc variab

.It kern.ipc.semmnu integer yes

.El

.Bl -tag -width "123456"

.It Li kern.ipc.sysvmsg ( KERN_SYSVIPC_MSG )

.It Li kern.ipc.sysvmsg ( Dv 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 )

.It Li kern.ipc.sysvsem ( Dv 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 )

.It Li kern.ipc.sysvshm ( Dv 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 )

.It Li kern.ipc.sysvipc_info ( Dv 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_INFO" "struct shm_sysctl_info" -offset indent

.It Sy Fourth level name Type

.It Sy Fourth level name Sy 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.

Line 619 The

Line 624 The

structure is defined in

.In sys/shm.h .

.El

.It Li kern.ipc.shmmax ( KERN_SYSVIPC_SHMMAX )

.It Li kern.ipc.shmmax ( Dv KERN_SYSVIPC_SHMMAX )

Max shared memory segment size in bytes.

.It Li kern.ipc.shmmni ( KERN_SYSVIPC_SHMMNI )

.It Li kern.ipc.shmmni ( Dv KERN_SYSVIPC_SHMMNI )

Max number of shared memory identifiers.

.It Li kern.ipc.shmseg ( KERN_SYSVIPC_SHMSEG )

.It Li kern.ipc.shmseg ( Dv KERN_SYSVIPC_SHMSEG )

Max shared memory segments per process.

.It Li kern.ipc.shmmaxpgs ( KERN_SYSVIPC_SHMMAXPGS )

.It Li kern.ipc.shmmaxpgs ( Dv KERN_SYSVIPC_SHMMAXPGS )

Max amount of shared memory in pages.

.It Li kern.ipc.shm_use_phys ( KERN_SYSVIPC_SHMUSEPHYS )

.It Li kern.ipc.shm_use_phys ( Dv KERN_SYSVIPC_SHMUSEPHYS )

Locking of shared memory in physical memory.

If 0, memory can be swapped

out, otherwise it will be locked in physical memory.

Line 642 Max number of number of semaphores in sy

Line 647 Max number of number of semaphores in sy

.It Li kern.ipc.semmnu

Max number of undo structures in system.

.El

.It Li kern.job_control ( KERN_JOB_CONTROL )

.It Li kern.job_control ( Dv KERN_JOB_CONTROL )

Return 1 if job control is available on this system, otherwise\ 0.

.It Li kern.labeloffset ( KERN_LABELOFFSET )

.It Li kern.labeloffset ( Dv KERN_LABELOFFSET )

The offset within the sector specified by

.Dv KERN_LABELSECTOR

of the

.Xr disklabel 5 .

.It Li kern.labelsector ( KERN_LABELSECTOR )

.It Li kern.labelsector ( Dv KERN_LABELSECTOR )

The sector number containing the

.Xr disklabel 5 .

.It Li kern.login_name_max ( KERN_LOGIN_NAME_MAX )

.It Li kern.login_name_max ( Dv 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 )

.It Li kern.logsigexit ( Dv 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 )

.It Li kern.mapped_files ( Dv KERN_MAPPED_FILES )

Returns 1 if the

.St -p1003.1b-93

Memory Mapped Files Option is available on this system,

otherwise\ 0.

.It Li kern.maxfiles ( KERN_MAXFILES )

.It Li kern.maxfiles ( Dv KERN_MAXFILES )

The maximum number of open files that may be open in the system.

.It Li kern.maxpartitions ( KERN_MAXPARTITIONS )

.It Li kern.maxpartitions ( Dv KERN_MAXPARTITIONS )

The maximum number of partitions allowed per disk.

.It Li kern.maxlwp

The maximum number of Lightweight Processes (threads) the system allows

per uid.

.It Li kern.maxphys ( KERN_MAXPHYS )

.It Li kern.maxphys ( Dv KERN_MAXPHYS )

Maximum raw I/O transfer size.

.It Li kern.maxproc ( KERN_MAXPROC )

.It Li kern.maxproc ( Dv KERN_MAXPROC )

The maximum number of simultaneous processes the system will allow.

.It Li kern.maxptys ( KERN_MAXPTYS )

.It Li kern.maxptys ( Dv 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 )

.It Li kern.maxvnodes ( Dv KERN_MAXVNODES )

The maximum number of vnodes available on the system.

This can only be raised.

.It Li kern.mbuf ( KERN_MBUF )

.It Li kern.mbuf ( Dv 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

Line 695 The third level names for the mbuf varia

Line 700 The third level names for the mbuf varia

The changeable column shows whether a process with appropriate

privilege may change the value.

.Bl -column "kern.mbuf.nmbclusters" "integer" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.\" XXX Changeable? really?

.It kern.mbuf.mblowat integer yes

.It kern.mbuf.mclbytes integer yes

Line 706 privilege may change the value.

Line 711 privilege may change the value.

.Pp

The variables are as follows:

.Bl -tag -width "123456"

.It Li kern.mbuf.mblowat ( MBUF_MBLOWAT )

.It Li kern.mbuf.mblowat ( Dv MBUF_MBLOWAT )

The mbuf low water mark.

.It Li kern.mbuf.mclbytes ( MBUF_MCLBYTES )

.It Li kern.mbuf.mclbytes ( Dv MBUF_MCLBYTES )

The mbuf cluster size.

.It Li kern.mbuf.mcllowat ( MBUF_MCLLOWAT )

.It Li kern.mbuf.mcllowat ( Dv MBUF_MCLLOWAT )

The mbuf cluster low water mark.

.It Li kern.mbuf.msize ( MBUF_MSIZE )

.It Li kern.mbuf.msize ( Dv MBUF_MSIZE )

The mbuf base size.

.It Li kern.mbuf.nmbclusters ( MBUF_NMBCLUSTERS )

.It Li kern.mbuf.nmbclusters ( Dv 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 )

.It Li kern.memlock ( Dv KERN_MEMLOCK )

Returns 1 if the

.St -p1003.1b-93

Process Memory Locking Option is available on this system,

otherwise\ 0.

.It Li kern.memlock_range ( KERN_MEMLOCK_RANGE )

.It Li kern.memlock_range ( Dv KERN_MEMLOCK_RANGE )

Returns 1 if the

.St -p1003.1b-93

Range Memory Locking Option is available on this system,

otherwise\ 0.

.It Li kern.memory_protection ( KERN_MEMORY_PROTECTION )

.It Li kern.memory_protection ( Dv KERN_MEMORY_PROTECTION )

Returns 1 if the

.St -p1003.1b-93

Memory Protection Option is available on this system,

Line 738 otherwise\ 0.

Line 743 otherwise\ 0.

Settings related to kernel modules.

The third level names for the settings are described below.

.Bl -column "kern.module.autoload" "integer" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It kern.module.autoload integer yes

.It kern.module.autotime integer yes

.It kern.module.verbose integer yes

Line 759 Setting this value to zero disables the

Line 764 Setting this value to zero disables the

A boolean that enables or disables verbose

debug messages related to kernel modules.

.El

.It Li kern.monotonic_clock ( KERN_MONOTONIC_CLOCK )

.It Li kern.monotonic_clock ( Dv KERN_MONOTONIC_CLOCK )

Returns the standard version the implementation of the

.St -p1003.1b-93

Monotonic Clock Option conforms to,

Line 773 This node is created dynamically when

Line 778 This node is created dynamically when

the corresponding kernel module is loaded.

The third level names for the settings are described below.

.Bl -column "kern.mqueue.mq_max_msgsize" "integer" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It kern.mqueue.mq_open_max integer yes

.It kern.mqueue.mq_prio_max integer yes

.It kern.mqueue.mq_max_msgsize integer yes

Line 794 The default maximum message count.

Line 799 The default maximum message count.

.It Li kern.mqueue.mq_max_maxmsg

The maximum number of messages in a message queue.

.El

.It Li kern.msgbuf ( KERN_MSGBUF )

.It Li kern.msgbuf ( Dv 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 )

.It Li kern.msgbufsize ( Dv KERN_MSGBUFSIZE )

The maximum number of characters that the kernel message buffer can hold.

.It Li kern.ngroups ( KERN_NGROUPS )

.It Li kern.ngroups ( Dv KERN_NGROUPS )

The maximum number of supplemental groups.

.\" .It Li kern.no_sa_support

.\" XXX: Undocumented.

.It Li kern.ntptime ( KERN_NTPTIME )

.It Li kern.ntptime ( Dv KERN_NTPTIME )

.Vt struct ntptimeval

structure is returned.

This structure contains data used by the

.Xr ntpd 8

program.

.It Li kern.osrelease ( KERN_OSRELEASE )

.It Li kern.osrelease ( Dv KERN_OSRELEASE )

The system release string.

.It Li kern.osrevision ( KERN_OSREV )

.It Li kern.osrevision ( Dv KERN_OSREV )

The system revision string.

.It Li kern.ostype ( KERN_OSTYPE )

.It Li kern.ostype ( Dv KERN_OSTYPE )

The system type string.

.\".It Li kern.panic_now

.\" XXX: Undocumented.

.It Li kern.pipe ( KERN_PIPE )

.It Li kern.pipe ( Dv 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.maxbigpipes" "integer" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It kern.pipe.kvasiz integer yes

.It kern.pipe.maxbigpipes integer yes

.It kern.pipe.maxkvasz integer yes

Line 835 privilege may change the value.

Line 840 privilege may change the value.

.Pp

The variables are as follows:

.Bl -tag -width "123456"

.It Li kern.pipe.kvasiz ( KERN_PIPE_KVASIZ )

.It Li kern.pipe.kvasiz ( Dv KERN_PIPE_KVASIZ )

Amount of kernel memory consumed by pipe buffers.

.It Li kern.pipe.maxbigpipes ( KERN_PIPE_MAXBIGPIPES )

.It Li kern.pipe.maxbigpipes ( Dv KERN_PIPE_MAXBIGPIPES )

Maximum number of

.Dq big

pipes.

.It Li kern.pipe.maxkvasz ( KERN_PIPE_MAXKVASZ )

.It Li kern.pipe.maxkvasz ( Dv KERN_PIPE_MAXKVASZ )

Maximum amount of kernel memory to be used for pipes.

.It Li kern.pipe.limitkva ( KERN_PIPE_LIMITKVA )

.It Li kern.pipe.limitkva ( Dv KERN_PIPE_LIMITKVA )

Limit for direct transfers via page loan.

.It Li kern.pipe.nbigpipes ( KERN_PIPE_NBIGPIPES )

.It Li kern.pipe.nbigpipes ( Dv KERN_PIPE_NBIGPIPES )

Number of

.Dq big

pipes.

Line 858 and

Line 863 and

subsystems.

.\" XXX: Undocumented .It Li kern.posix ( ? )

.\" This is a node in which the only variable is semmax.

.It Li kern.posix1version ( KERN_POSIX1 )

.It Li kern.posix1version ( Dv KERN_POSIX1 )

The version of ISO/IEC 9945

.Pq St -p1003.1

with which the system attempts to comply.

Line 866 with which the system attempts to comply

Line 871 with which the system attempts to comply

The version of

.St -p1003.1

and its Asynchronous I/O option to which the system attempts to conform.

.It Li kern.posix_barriers ( KERN_POSIX_BARRIERS )

.It Li kern.posix_barriers ( Dv 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 )

.It Li kern.posix_reader_writer_locks ( Dv KERN_POSIX_READER_WRITER_LOCKS )

The version of

.St -p1003.1

and its

Line 882 option to which the system attempts to c

Line 887 option to which the system attempts to c

otherwise\ 0.

.\".It Li kern.posix_sched

.\" XXX: Undocumented.

.It Li kern.posix_semaphores ( KERN_POSIX_SEMAPHORES )

.It Li kern.posix_semaphores ( Dv 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 )

.It Li kern.posix_spin_locks ( Dv 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 )

.It Li kern.posix_threads ( Dv 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 )

.It Li kern.posix_timers ( Dv 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 )

.It Li kern.proc ( Dv KERN_PROC )

Return the entire process table, or a subset of it.

An array of

.Vt struct kinfo_proc

Line 918 structures is returned,

Line 923 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 "KERN_PROC_SESSION" "Fourth level is:" -offset indent

.It Sy Third level name Fourth level is:

.It Sy Third level name Sy Fourth level is:

.It KERN_PROC_ALL None

.It KERN_PROC_GID A group ID

.It KERN_PROC_PID A process ID

Line 929 The third and fourth level numeric names

Line 934 The third and fourth level numeric names

.It KERN_PROC_TTY A tty device

.It KERN_PROC_UID A user ID

.El

.It Li kern.proc2 ( KERN_PROC2 )

.It Li kern.proc2 ( Dv KERN_PROC2 )

As for

.Dv KERN_PROC ,

but an array of

Line 938 structures are returned.

Line 943 structures are returned.

The fifth level name is the size of the

.Vt struct kinfo_proc2

and the sixth level name is the number of structures to return.

.It Li kern.proc_args ( KERN_PROC_ARGS )

.It Li kern.proc_args ( Dv 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 "KERN_PROG_NARGV" "The number of environ strings" -offset indent

.Bl -column "KERN_PROG_PATHNAME" "The full pathname of the executable" -offset indent

.It KERN_PROC_ARGV The argv strings

.It Dv KERN_PROC_ARGV The argv strings

.It KERN_PROC_ENV The environ strings

.It Dv KERN_PROC_ENV The environ strings

.It KERN_PROC_NARGV The number of argv strings

.It Dv KERN_PROC_NARGV The number of argv strings

.It KERN_PROC_NENV The number of environ strings

.It Dv KERN_PROC_NENV The number of environ strings

.It Dv KERN_PROC_PATHNAME The full pathname of the executable

.El

.It Li kern.profiling ( KERN_PROF )

.It Li kern.profiling ( Dv KERN_PROF )

Return profiling information about the kernel.

If the kernel is not compiled for profiling,

attempts to retrieve any of the

Line 962 is detailed below.

Line 968 is detailed below.

The changeable column shows whether a process with appropriate

privilege may change the value.

.Bl -column "kern.profiling.gmonparam" "struct gmonparam" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It kern.profiling.count u_short[\|] yes

.It kern.profiling.froms u_short[\|] yes

.It kern.profiling.gmonparam struct gmonparam no

Line 972 privilege may change the value.

Line 978 privilege may change the value.

.Pp

The variables are as follows:

.Bl -tag -width "123456"

.It Li kern.profiling.count ( GPROF_COUNT )

.It Li kern.profiling.count ( Dv GPROF_COUNT )

Array of statistical program counter counts.

.It Li kern.profiling.froms ( GPROF_FROMS )

.It Li kern.profiling.froms ( Dv GPROF_FROMS )

Array indexed by program counter of call-from points.

.It Li kern.profiling.gmonparams ( GPROF_GMONPARAM )

.It Li kern.profiling.gmonparams ( Dv GPROF_GMONPARAM )

Structure giving the sizes of the above arrays.

.It Li kern.profiling.state ( GPROF_STATE )

.It Li kern.profiling.state ( Dv GPROF_STATE )

Profiling state.

If set to

.Dv GMON_PROF_ON ,

Line 986 starts profiling.

Line 992 starts profiling.

If set to

.Dv GMON_PROF_OFF ,

stops profiling.

.It Li kern.profiling.tos ( GPROF_TOS )

.It Li kern.profiling.tos ( Dv GPROF_TOS )

Array of

.Vt struct tostruct

describing destination of calls and their counts.

.El

.\" .It Li kern.pset

.\" XXX: Undocumented.

.It Li kern.rawpartition ( KERN_RAWPARTITION )

.It Li kern.rawpartition ( Dv KERN_RAWPARTITION )

The raw partition of a disk (a == 0).

.It Li kern.root_device ( KERN_ROOT_DEVICE )

.It Li kern.root_device ( Dv KERN_ROOT_DEVICE )

The name of the root device (e.g.,

.Dq wd0 ) .

.It Li kern.root_partition ( KERN_ROOT_PARTITION )

.It Li kern.root_partition ( Dv KERN_ROOT_PARTITION )

The root partition on the root device (a == 0).

.It Li kern.rtc_offset ( KERN_RTC_OFFSET )

.It Li kern.rtc_offset ( Dv KERN_RTC_OFFSET )

Return the offset of real time clock from UTC in minutes.

.It Li kern.saved_ids ( KERN_SAVED_IDS )

.It Li kern.saved_ids ( Dv KERN_SAVED_IDS )

Returns 1 if saved set-group and saved set-user ID is available.

.It Li kern.sbmax ( KERN_SBMAX )

.It Li kern.sbmax ( Dv KERN_SBMAX )

Maximum socket buffer size.

.\" XXX units?

.It Li kern.securelevel ( KERN_SECURELVL )

.It Li kern.securelevel ( Dv KERN_SECURELVL )

See

.Xr secmodel_securelevel 9 .

.\" .It Li kern.sched

.\" XXX: Undocumented.

.It Li kern.somaxkva ( KERN_SOMAXKVA )

.It Li kern.somaxkva ( Dv KERN_SOMAXKVA )

Maximum amount of kernel memory to be used for socket buffers.

.\" XXX units?

.It Li kern.synchronized_io ( KERN_SYNCHRONIZED_IO )

.It Li kern.synchronized_io ( Dv KERN_SYNCHRONIZED_IO )

Returns 1 if the

.St -p1003.1b-93

Synchronized I/O Option is available on this system,

Line 1023 otherwise\ 0.

Line 1029 otherwise\ 0.

.It Li kern.timecounter ( dynamic )

Display and control the timecounter source of the system.

.Bl -column "kern.timecounter.timestepwarnings" "integer" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It kern.timecounter.choice string no

.It kern.timecounter.hardware string yes

.It kern.timecounter.timestepwarnings integer yes

Line 1038 The currently selected timecounter sourc

Line 1044 The currently selected timecounter sourc

.It Li kern.timecounter.timestepwarnings ( dynamic )

If non-zero display a message each time the time is stepped.

.El

.It Li kern.timex ( KERN_TIMEX )

.It Li kern.timex ( Dv KERN_TIMEX )

Not available.

.It Li kern.tkstat ( KERN_TKSTAT )

.It Li kern.tkstat ( Dv 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 "kern.tkstat.cancc" "quad" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It kern.tkstat.cancc quad no

.It kern.tkstat.nin quad no

.It kern.tkstat.nout quad no

Line 1056 with appropriate privilege may change th

Line 1062 with appropriate privilege may change th

.Pp

The variables are as follows:

.Bl -tag -width "123456"

.It Li kern.tkstat.cancc ( KERN_TKSTAT_CANCC )

.It Li kern.tkstat.cancc ( Dv KERN_TKSTAT_CANCC )

The number of canonical input characters.

.It Li kern.tkstat.nin ( KERN_TKSTAT_NIN )

.It Li kern.tkstat.nin ( Dv KERN_TKSTAT_NIN )

The total number of input characters.

.It Li kern.tkstat.nout ( KERN_TKSTAT_NOUT )

.It Li kern.tkstat.nout ( Dv KERN_TKSTAT_NOUT )

The total number of output characters.

.It Li kern.tkstat.rawcc ( KERN_TKSTAT_RAWCC )

.It Li kern.tkstat.rawcc ( Dv KERN_TKSTAT_RAWCC )

The number of raw input characters.

.El

.It Li kern.tty

Line 1070 The third level names for the tty setup

Line 1076 The third level names for the tty setup

The changeable column shows whether a process

with appropriate privilege may change the value.

.Bl -column "kern.tty.qsize" "int" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It kern.tty.qsize int yes

.El

.Pp

Line 1087 and

Line 1093 and

.It Li kern.uidinfo

Resource usage for the current user.

.Bl -column "kern.uidinfo.proccnt" "integer" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It kern.uidinfo.proccnt integer no

.It kern.uidinfo.lwpcnt integer no

.It kern.uidinfo.lockcnt integer no

Line 1104 Number of locks held by the current user

Line 1110 Number of locks held by the current user

.It Li kern.uidinfo.sbsize

Number of bytes in socket buffers allocated to the current user.

.El

.It Li kern.urandom ( KERN_URND )

.It Li kern.urandom ( Dv KERN_URND )

Random integer value.

.It Li kern.usercrypto

When enabled, allows userland to

Line 1122 system.

Line 1128 system.

Runtime information for

.Xr veriexec 8 .

.Bl -column "kern.veriexec.algorithms" "integer" "Changeable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It kern.veriexec.algorithms string no

.It kern.veriexec.count node not applicable

.It kern.veriexec.strict integer yes

Line 1153 If 1, more messages will be printed (ie.

Line 1159 If 1, more messages will be printed (ie.

fingerprint is accessed).

Verbose level 2 is debug mode.

.El

.It Li kern.version ( KERN_VERSION )

.It Li kern.version ( Dv KERN_VERSION )

The system version string.

.It Li kern.vnode ( KERN_VNODE )

.It Li kern.vnode ( Dv KERN_VNODE )

Return the entire vnode table.

Note, the vnode table is not necessarily a consistent snapshot of

the system.

Line 1171 followed by the vnode itself

Line 1177 followed by the vnode itself

The set of variables defined is architecture dependent.

Most architectures define at least the following variables.

.Bl -column "machdep.booted_kernel" "Type" "Changeable" -offset indent

.It Sy Second level name Type Changeable

.It Sy Second level name Sy Type Sy Changeable

.It Li machdep.booted_kernel string no

.El

.\" XXX: Document the above.

Line 1184 privilege may change the value.

Line 1190 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 name" "IPsec key management values" "Changeable" -offset indent

.It Sy Second level name Type Changeable

.It Sy Second level name Sy Type Sy 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 )

.It Li net.route ( Dv 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

Line 1205 The fourth level name is an address fami

Line 1210 The fourth level name is an address fami

select all address families.

The fifth and sixth level names are as follows:

.Bl -column "Fifth level name" "Sixth level is:" -offset indent

.It Sy Fifth level name Sixth level is:

.It Sy Fifth level name Sy 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 )

.It Li net.inet ( Dv 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" "Changeable" -offset 4n

.Bl -column "Protocol" "anonportalgo.available" "integer" "Changeable" -offset indent

.It Sy Protocol name Variable name Type Changeable

.It Sy Protocol Variable Sy Type Sy Changeable

.It arp down integer yes

.It arp keep integer yes

.It arp log_movements integer yes

.It arp log_permanent_modify integer yes

.It arp log_unknown_network integer yes

.It arp log_wrong_iface 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

Line 1306 The variables are as follows:

Line 1310 The variables are as follows:

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

Line 1485 Perform TCP checksum on loopback.

.It Li tcp.init_win

A value indicating the TCP initial congestion window.

The valid range

is 0 to 10 (maximum specified by draft-ietf-tcpm-initcwnd-08.txt),

is 0 to 10 (maximum specified by RFC6928),

with a default of 4 (approximately 4K per RFC3390).

.It Li tcp.init_win_local

Line 1591 The default UDP send buffer size.

.Pp

For variables net.*.ipsec, please refer to

.Xr ipsec 4 .

.It Li net.inet6 ( PF_INET6 )

.It Li net.inet6 ( Dv 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" "do_loopback_cksum" "integer" "Changeable" -offset indent

.Bl -column "Protocol" "anonportalgo.available" "integer" "Changeable" -offset indent

.It Sy Protocol name Variable name Type Changeable

.It Sy Protocol Variable Sy Type Sy Changeable

.It icmp6 errppslimit integer yes

.It icmp6 mtudisc_hiwat integer yes

.It icmp6 mtudisc_lowat integer yes

Line 1613 The currently defined protocols and name

.It icmp6 rediraccept integer yes

.It icmp6 redirtimeout integer yes

.It ip6 accept_rtadv integer yes

.It ip6 addctlpolicy struct in6_addrpolicy no

.It ip6 anonportalgo.selected string yes

.It ip6 anonportalgo.available string yes

.It ip6 anonportalgo.reserve struct yes

.It ip6 anonportmax integer yes

.It ip6 anonportmin integer yes

.It ip6 auto_flowlabel integer yes

Line 1768 The maximum number of fragments the node

Line 1769 The maximum number of fragments the node

\-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.neighborgcthresh

Maximum number of entries in neighbor cache.

Maximum number of entries in neighbor cache per interface.

Set to negative to disable.

The default value is 2048.

.It Li ip6.redirect

Line 1889 Please refer to

Line 1890 Please refer to

section above.

For variables net.*.ipsec6, please refer to

.Xr ipsec 4 .

.It Li net.key ( PF_KEY )

.It Li net.key ( Dv 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" "Changeable" -offset indent

.It Sy Variable name Type Changeable

.It Sy Variable Type Sy Changeable

.It debug integer yes

.It enabled integer yes

.It used integer no

Line 1974 value of PROC_PID_CORENAME is reset to t

Line 1975 value of PROC_PID_CORENAME is reset to t

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 "proc.pid.corename" "string" "not applicable" -offset indent

.It Sy Third level name Type Changeable

.It Sy Third level name Sy Type Sy Changeable

.It proc.pid.corename string yes

.It proc.pid.rlimit node not applicable

.It proc.pid.stopfork int yes

Line 1982 points to the current process, or the PI

Line 1983 points to the current process, or the PI

.It proc.pid.stopexit int yes

.El

.Bl -tag -width "123456"

.It Li proc.pid.corename ( PROC_PID_CORENAME )

.It Li proc.pid.corename ( Dv PROC_PID_CORENAME )

The template used for the core dump file name (see

.Xr core 5

for details).

Line 1993 or end with the suffix

Line 1994 or end with the suffix

(the super-user may set arbitrary names).

By default it points to

.Dv KERN_DEFCORENAME .

.It Li proc.pid.rlimit ( PROC_PID_LIMIT )

.It Li proc.pid.rlimit ( Dv PROC_PID_LIMIT )

Return resources limits, as defined for the

.Xr getrlimit 2

and

Line 2001 and

Line 2002 and

system calls.

The fourth level name is one of:

.Bl -tag -width "123456"

.It Li proc.pid.rlimit.cputime ( PROC_PID_LIMIT_CPU )

.It Li proc.pid.rlimit.cputime ( Dv 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 )

.It Li proc.pid.rlimit.filesize ( Dv PROC_PID_LIMIT_FSIZE )

The largest size (in bytes) file that may be created.

.It Li proc.pid.rlimit.datasize ( PROC_PID_LIMIT_DATA )

.It Li proc.pid.rlimit.datasize ( Dv 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 )

.It Li proc.pid.rlimit.stacksize ( Dv 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 )

.It Li proc.pid.rlimit.coredumpsize ( Dv 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 )

.It Li proc.pid.rlimit.memoryuse ( Dv 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 )

.It Li proc.pid.rlimit.memorylocked ( Dv 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 )

.It Li proc.pid.rlimit.maxproc ( Dv PROC_PID_LIMIT_NPROC )

The maximum number of simultaneous processes for this user id.

.It Li proc.pid.rlimit.descriptors ( PROC_PID_LIMIT_NOFILE )

.It Li proc.pid.rlimit.descriptors ( Dv PROC_PID_LIMIT_NOFILE )

The maximum number of open files for this process.

.It Li proc.pid.rlimit.sbsize ( PROC_PID_LIMIT_SBSIZE )

.It Li proc.pid.rlimit.sbsize ( Dv PROC_PID_LIMIT_SBSIZE )

The maximum size (in bytes) of the socket buffers

set by the

.Xr setsockopt 2

Line 2041 set by the

Line 2042 set by the

and

.Dv SO_SNDBUF

options.

.It Li proc.pid.rlimit.vmemoryuse ( Dv PROC_PID_LIMIT_AS )

The maximum size (in bytes) which a process can obtain.

.It Li proc.pid.rlimit.maxlwp ( Dv PROC_PID_LIMIT_NTHR )

The maximum number of threads that cen be created and running at one time in

the process.

The first thread of each process is not counted against this.

.El

.Pp

The fifth level name is one of

.Li soft ( PROC_PID_LIMIT_TYPE_SOFT )

.Li soft ( Dv PROC_PID_LIMIT_TYPE_SOFT )

.Li hard ( PROC_PID_LIMIT_TYPE_HARD ) ,

.Li hard ( Dv 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 )

.It Li proc.pid.stopfork ( Dv PROC_PID_STOPFORK )

If non zero, the process' children will be stopped after

.Xr fork 2

calls.

Line 2064 apply to emulation specific system calls

Line 2071 apply to emulation specific system calls

.Fn sproc

.Fn clone .

.It Li proc.pid.stopexec ( PROC_PID_STOPEXEC )

.It Li proc.pid.stopexec ( Dv PROC_PID_STOPEXEC )

If non zero, the process will be stopped on next

.Xr exec 3

call.

Line 2077 This feature helps attaching a process w

Line 2084 This feature helps attaching a process w

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 )

.It Li proc.pid.stopexit ( Dv 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 ,

Line 2095 before it disappears.

Line 2102 before it disappears.

.Pp

This value is also inherited by the process's children.

.El

.Ss The user.* subtree ( CTL_USER )

.Ss The user.* subtree ( Dv 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_max" "integer" "Changeable" -offset indent

.It Sy Second level name Type Changeable

.It Sy Second level name Sy Type Sy Changeable

.It user.atexit_max integer no

.It user.bc_base_max integer no

.It user.bc_dim_max integer no

Line 2127 privilege may change the value.

Line 2134 privilege may change the value.

.It user.tzname_max integer no

.El

.Bl -tag -width "123456"

.It Li user.atexit_max ( USER_ATEXIT_MAX )

.It Li user.atexit_max ( Dv 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 )

.It Li user.bc_base_max ( Dv 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 )

.It Li user.bc_dim_max ( Dv USER_BC_DIM_MAX )

The maximum array size in the

.Xr bc 1

utility.

.It Li user.bc_scale_max ( USER_BC_SCALE_MAX )

.It Li user.bc_scale_max ( Dv USER_BC_SCALE_MAX )

The maximum scale value in the

.Xr bc 1

utility.

.It Li user.bc_string_max ( USER_BC_STRING_MAX )

.It Li user.bc_string_max ( Dv USER_BC_STRING_MAX )

The maximum string length in the

.Xr bc 1

utility.

.It Li user.coll_weights_max ( USER_COLL_WEIGHTS_MAX )

.It Li user.coll_weights_max ( Dv 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 )

.It Li user.expr_nest_max ( Dv 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 )

.It Li user.line_max ( Dv 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 )

.It Li user.posix2_char_term ( Dv USER_POSIX2_CHAR_TERM )

Return 1 if the system supports at least one terminal type capable of

all operations described in

.St -p1003.2 ,

otherwise\ 0.

.It Li user.posix2_c_bind ( USER_POSIX2_C_BIND )

.It Li user.posix2_c_bind ( Dv 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 )

.It Li user.posix2_c_dev ( Dv 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 )

.It Li user.posix2_fort_dev ( Dv 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 )

.It Li user.posix2_fort_run ( Dv 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 )

.It Li user.posix2_localedef ( Dv 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 )

.It Li user.posix2_sw_dev ( Dv 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 )

.It Li user.posix2_upe ( Dv USER_POSIX2_UPE )

Return 1 if the system supports the User Portability Utilities Option,

otherwise\ 0.

.It Li user.posix2_version ( USER_POSIX2_VERSION )

.It Li user.posix2_version ( Dv USER_POSIX2_VERSION )

The version of

.St -p1003.2

with which the system attempts to comply.

.It Li user.re_dup_max ( USER_RE_DUP_MAX )

.It Li user.re_dup_max ( Dv USER_RE_DUP_MAX )

The maximum number of repeated occurrences of a regular expression

permitted when using interval notation.

.It Li user.stream_max ( USER_STREAM_MAX )

.It Li user.stream_max ( Dv 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 )

.It Li user.tzname_max ( Dv USER_TZNAME_MAX )

The minimum maximum number of types supported for the name of a

timezone.

.El

.Ss The vm.* subtree ( CTL_VM )

.Ss The vm.* subtree ( Dv 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 name" "struct uvmexp_sysctl" "Changeable" -offset indent

.It Sy Second level name Type Changeable

.It Sy Second level name Sy Type Sy Changeable

.It vm.anonmax int yes

.It vm.anonmin int yes

.It vm.bufcache int yes

Line 2225 privilege may change the value.

Line 2232 privilege may change the value.

.It vm.uvmexp struct uvmexp no

.It vm.uvmexp2 struct uvmexp_sysctl no

.It vm.vmmeter struct vmtotal no

.It vm.proc.map struct kinfo_vmentry no

.El

.Pp

.Bl -tag -width "123456"

.It Li vm.anonmax ( VM_ANONMAX )

.It Li vm.anonmax ( Dv 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 )

.It Li vm.anonmin ( Dv VM_ANONMIN )

The percentage of physical memory which will be always be available for

anonymous application data.

.It Li vm.bufcache ( VM_BUFCACHE )

.It Li vm.bufcache ( Dv VM_BUFCACHE )

The percentage of physical memory which will be available

for the buffer cache.

.It Li vm.bufmem ( VM_BUFMEM )

.It Li vm.bufmem ( Dv VM_BUFMEM )

The amount of kernel memory that is being used by the buffer cache.

.It Li vm.bufmem_lowater ( VM_BUFMEM_LOWATER )

.It Li vm.bufmem_lowater ( Dv VM_BUFMEM_LOWATER )

The minimum amount of kernel memory to reserve for the

buffer cache.

.It Li vm.bufmem_hiwater ( VM_BUFMEM_HIWATER )

.It Li vm.bufmem_hiwater ( Dv VM_BUFMEM_HIWATER )

The maximum amount of kernel memory to be used for the

buffer cache.

.It Li vm.execmax ( VM_EXECMAX )

.It Li vm.execmax ( Dv 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 )

.It Li vm.execmin ( Dv VM_EXECMIN )

The percentage of physical memory which will be always be available for

cached executable data.

.It Li vm.filemax ( VM_FILEMAX )

.It Li vm.filemax ( Dv 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 )

.It Li vm.filemin ( Dv VM_FILEMIN )

The percentage of physical memory which will be always be available for

cached file data.

.It Li vm.loadavg ( VM_LOADAVG )

.It Li vm.loadavg ( Dv VM_LOADAVG )

Return the load average history.

The returned data consists of a

.Vt struct loadavg .

.It Li vm.maxslp ( VM_MAXSLP )

.It Li vm.maxslp ( Dv VM_MAXSLP )

The value of the maxslp kernel global variable.

.It Li vm.vmmeter ( VM_METER )

.It Li vm.vmmeter ( Dv VM_METER )

Return system wide virtual memory statistics.

The returned data consists of a

.Vt struct vmtotal .

.It vm.user_va0_disable

A flag which controls whether user processes can map virtual address\ 0.

.It Li vm.uspace ( VM_USPACE )

.It Li vm.proc.map ( Dv VM_PROC )

The third level is

.dv VM_PROC_MAP ,

the fourth is the pid of the process to display the vm object entries for, and

the fifth is the size of

.Vt struct kinfo_vmentry .

Returns an array of

.Vt struct kinfo_vmentry

objects.

.It Li vm.uspace ( Dv VM_USPACE )

The number of bytes allocated for each kernel stack.

.It Li vm.uvmexp ( VM_UVMEXP )

.It Li vm.uvmexp ( Dv VM_UVMEXP )

Return system wide virtual memory statistics.

The returned data consists of a

.Vt struct uvmexp .

.It Li vm.uvmexp2 ( VM_UVMEXP2 )

.It Li vm.uvmexp2 ( Dv VM_UVMEXP2 )

Return system wide virtual memory statistics.

The returned data consists of a

.Vt struct uvmexp_sysctl .

.\" XXX vm.idlezero

.El

.Ss The ddb.* subtree ( CTL_DDB )

.Ss The ddb.* subtree ( Dv CTL_DDB )

The information available for the

.Li ddb

level is detailed below.

Line 2289 The changeable column shows whether a pr

Line 2305 The changeable column shows whether a pr

privilege may change the value.

.\" XXX sort

.Bl -column "Second level name" "integer" "Changeable" -offset indent

.It Sy Second level name Type Changeable

.It Sy Second level name Sy Type Sy Changeable

.It ddb.radix integer yes

.It ddb.maxoff integer yes

.It ddb.maxwidth integer yes

Line 2300 privilege may change the value.

Line 2316 privilege may change the value.

.It ddb.tee_msgbuf integer yes

.It ddb.commandonenter string yes

.El

.Pp

.Bl -tag -width "123456"

.It Li ddb.radix ( DDBCTL_RADIX )

.It Li ddb.radix ( Dv DDBCTL_RADIX )

The input and output radix.

.It Li ddb.maxoff ( DDBCTL_MAXOFF )

.It Li ddb.maxoff ( Dv DDBCTL_MAXOFF )

The maximum symbol offset.

.It Li ddb.maxwidth ( DDBCTL_MAXWIDTH )

.It Li ddb.maxwidth ( Dv DDBCTL_MAXWIDTH )

The maximum output line width.

.It Li ddb.lines ( DDBCTL_LINES )

.It Li ddb.lines ( Dv DDBCTL_LINES )

Number of display lines.

.It Li ddb.tabstops ( DDBCTL_TABSTOPS )

.It Li ddb.tabstops ( Dv DDBCTL_TABSTOPS )

Tab width.

.It Li ddb.onpanic ( DDBCTL_ONPANIC )

.It Li ddb.onpanic ( Dv DDBCTL_ONPANIC )

If greater than zero, DDB will be entered if the kernel panics.

A value of 1 causes the system to enter DDB on panic, while a value of 2

causes the kernel to attempt to print out a stack trace before entering DDB.

A value of 0 causes the kernel to attempt to print a stack trace, then

reboot, while a value of \-1 means neither a stack trace will be printed

nor DDB entered.

.It Li ddb.fromconsole ( DDBCTL_FROMCONSOLE )

.It Li ddb.fromconsole ( Dv DDBCTL_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.

.It Li ddb.tee_msgbuf

Line 2338 nodes are also available as variables fr

Line 2353 nodes are also available as variables fr

See

.Xr ddb 4

for more details.

.Ss The security.* subtree ( CTL_SECURITY )

.Ss The security.* subtree ( Dv CTL_SECURITY )

The

.Li security

level contains various security-related settings for

the system.

The available second level names are:

.Bl -column "Second level name" "integer" "Changeable" -offset indent

.It Sy Second level name Type Changeable

.It Sy Second level name Sy Type Sy Changeable

.It Li security.curtain integer yes

.It Li security.models node not applicable

.It Li security.pax node not applicable

.El

.Pp

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

.Tn ID

requesting information about them, preventing from users any

requesting information about them, preventing users from

access to objects they do not own.

accessing any objects they do not own.

.Pp

At the moment, it affects

.Xr ps 1 ,

Line 2400 The available third and fourth level nam

Line 2414 The available third and fourth level nam

.\".It Li security.pax.aslr.stack_len integer yes

.It Li security.pax.mprotect.enabled integer yes

.It Li security.pax.mprotect.global integer yes

.It Li security.pax.mprotect.ptrace integer yes

.It Li security.pax.segvguard.enabled integer yes

.It Li security.pax.segvguard.expiry_timeout integer yes

.It Li security.pax.segvguard.global integer yes

.It Li security.pax.segvguard.max_crashes integer yes

.It Li security.pax.segvguard.suspend_timeout integer yes

.El

.Pp

.Bl -tag -width "123456"

.It Li security.pax.aslr.enabled

Enable PaX ASLR (Address Space Layout Randomization).

Line 2448 except those exempted with

Line 2462 except those exempted with

Otherwise, all programs will not get the PaX MPROTECT restrictions,

except those specifically marked as such with

.Xr paxctl 8 .

.It Li security.pax.mprotect.ptrace

This variable allows

.Xr ptrace 2

to override PaX MPROTECT permissions.

It can have the following values:

.Bl -tag -width XX -compact

.It 0

Does not let override any permissions.

.It 1

Disables PaX MPROTECT from processes that start executing while traced (default).

.It 2

Bypasses PaX MPROTECT for all processes being traced.

.El

.It Li security.pax.segvguard.enabled

Enable PaX Segvguard.

.Pp

Line 2480 Number of seconds to suspend a user from

Line 2507 Number of seconds to suspend a user from

limit was exceeded.

.El

.Ss The vendor.* subtree ( CTL_VENDOR )

.Ss The vendor.* subtree ( Dv CTL_VENDOR )

The

.Li vendor

toplevel name is reserved to be used by vendors who wish to

CVSweb <webmaster@jp.NetBSD.org>