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Diff for /src/share/man/man7/sysctl.7 between version 1.90 and 1.91

version 1.90, 2015/07/11 16:47:49 version 1.91, 2015/07/11 17:24:13
Line 132  See
Line 132  See
 for more information.  for more information.
 .Ss The vfs.* subtree  .Ss The vfs.* subtree
 A distinguished second level name,  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.  is used to get general information about all file systems.
 It has the following third level identifiers:  It has the following third level identifiers:
 .Bl -tag -width "123456"  .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.  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  Returns configuration information about the file system type given as a fourth
 level identifier.  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  Determines if non superuser mounts are allowed, defaults to
 .Dv 0 .  .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  Controls if expansion of variables is going to be performed on pathnames
 or not.  or not.
 Defaults to no variable expansion,  Defaults to no variable expansion,
Line 206  privilege may change the value.
Line 206  privilege may change the value.
 .It hw.usermem64        quad    no  .It hw.usermem64        quad    no
 .El  .El
 .Bl -tag -width "123456"  .Bl -tag -width "123456"
 .It Li hw.alignbytes ( HW_ALIGNBYTES )  .It Li hw.alignbytes ( Dv HW_ALIGNBYTES )
 Alignment constraint for all possible data types.  Alignment constraint for all possible data types.
 This shows the value  This shows the value
 .Dv ALIGNBYTES  .Dv ALIGNBYTES
 in  in
 .In machine/param.h ,  .In machine/param.h ,
 at the kernel compilation time.  at the kernel compilation time.
 .It Li hw.byteorder ( HW_BYTEORDER )  .It Li hw.byteorder ( Dv HW_BYTEORDER )
 The byteorder (4321, or 1234).  The byteorder (4321, or 1234).
 .It Li hw.cnmagic ( HW_CNMAGIC )  .It Li hw.cnmagic ( Dv HW_CNMAGIC )
 The console magic key sequence.  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.  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  A space separated list of devices that will have I/O statistics
 collected on them.  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  Return statistical information on the NFS mounts, disk and tape
 devices on the system.  devices on the system.
 An array of  An array of
Line 242  Which can be
Line 242  Which can be
 (tape drive), or  (tape drive), or
 .Dv IOSTAT_NFS  .Dv IOSTAT_NFS
 (NFS mount).  (NFS mount).
 .It Li hw.machine ( HW_MACHINE )  .It Li hw.machine ( Dv HW_MACHINE )
 The machine class.  The machine class.
 .It Li hw.machine_arch ( HW_MACHINE_ARCH )  .It Li hw.machine_arch ( Dv HW_MACHINE_ARCH )
 The machine CPU class.  The machine CPU class.
 .It Li hw.model ( HW_MODEL )  .It Li hw.model ( Dv HW_MODEL )
 The machine model.  The machine model.
 .It Li hw.ncpu ( HW_NCPU )  .It Li hw.ncpu ( Dv HW_NCPU )
 The number of CPUs configured.  The number of CPUs configured.
 .It Li hw.ncpuonline ( HW_NCPUONLINE )  .It Li hw.ncpuonline ( Dv HW_NCPUONLINE )
 The number of CPUs online.  The number of CPUs online.
 .It Li hw.pagesize ( HW_PAGESIZE )  .It Li hw.pagesize ( Dv HW_PAGESIZE )
 The software page size.  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.  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.  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.  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.  The bytes of non-kernel memory as a 64-bit integer.
 .El  .El
 .Ss The kern.* subtree  .Ss The kern.* subtree
Line 386  The used random number generator
Line 386  The used random number generator
 .Pf ( Tn RNG )  .Pf ( Tn RNG )
 is based on  is based on
 .Xr arc4random 3 .  .Xr arc4random 3 .
 .It Li kern.argmax ( KERN_ARGMAX )  .It Li kern.argmax ( Dv KERN_ARGMAX )
 The maximum bytes of argument to  The maximum bytes of argument to
 .Xr execve 2 .  .Xr execve 2 .
 .It Li kern.boothowto  .It Li kern.boothowto
 Flags passed from the boot loader; see  Flags passed from the boot loader; see
 .Xr reboot 2  .Xr reboot 2
 for the meanings of the flags.  for the meanings of the flags.
 .It Li kern.boottime ( KERN_BOOTTIME )  .It Li kern.boottime ( Dv KERN_BOOTTIME )
 A  A
 .Vt struct timeval  .Vt struct timeval
 structure is returned.  structure is returned.
Line 403  When the kernel is built, the build envi
Line 403  When the kernel is built, the build envi
 arbitrary information to be stored in this variable.  arbitrary information to be stored in this variable.
 .\" .It Li kern.bufq  .\" .It Li kern.bufq
 .\" XXX: Undocumented.  .\" XXX: Undocumented.
 .It Li kern.ccpu ( KERN_CCPU )  .It Li kern.ccpu ( Dv KERN_CCPU )
 The scheduler exponential decay value.  The scheduler exponential decay value.
 .It Li kern.clockrate ( KERN_CLOCKRATE )  .It Li kern.clockrate ( Dv KERN_CLOCKRATE )
 A  A
 .Vt struct clockinfo  .Vt struct clockinfo
 structure is returned.  structure is returned.
Line 415  skew rate.
Line 415  skew rate.
 Refer to  Refer to
 .Xr hz 9  .Xr hz 9
 for additional details.  for additional details.
 .It Li kern.consdev ( KERN_CONSDEV )  .It Li kern.consdev ( Dv KERN_CONSDEV )
 Console device.  Console device.
 .It Li kern.coredump  .It Li kern.coredump
 Settings related to set-id processes coredumps.  Settings related to set-id processes coredumps.
Line 451  coredump.
Line 451  coredump.
 The path to which set-id processes' coredumps will be saved to.  The path to which set-id processes' coredumps will be saved to.
 Same syntax as kern.defcorename.  Same syntax as kern.defcorename.
 .El  .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.  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  Returns an array of
 .Dv CPUSTATES  .Dv CPUSTATES
 .Vt uint64_t Ns s.  .Vt uint64_t Ns s.
Line 478  non-accelerated transforms (handling the
Line 478  non-accelerated transforms (handling the
 .It Dv \*[Gt] 0  .It Dv \*[Gt] 0
 Allow user requests only for transforms which are hardware-accelerated.  Allow user requests only for transforms which are hardware-accelerated.
 .El  .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  Default template for the name of core dump files (see also
 .Li proc.pid.corename  .Li proc.pid.corename
 in the per-process variables  in the per-process variables
Line 495  and can be changed with the kernel confi
Line 495  and can be changed with the kernel confi
 ).  ).
 .It Li kern.detachall  .It Li kern.detachall
 Detach all devices at shutdown.  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.  Get or set the YP domain name.
 .It Li kern.drivers ( KERN_DRIVERS )  .It Li kern.drivers ( Dv KERN_DRIVERS )
 Return an array of  Return an array of
 .Vt struct kinfo_drivers  .Vt struct kinfo_drivers
 that contains the name and major device numbers of all the device drivers  that contains the name and major device numbers of all the device drivers
Line 508  field is always a NUL terminated string.
Line 508  field is always a NUL terminated string.
 The  The
 .Va d_bmajor  .Va d_bmajor
 field will be set to \-1 if the driver doesn't have a block device.  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  Perform a crash dump on system
 .Xr panic 9 .  .Xr panic 9 .
 .It Li kern.file ( KERN_FILE )  .It Li kern.file ( Dv KERN_FILE )
 Return the entire file table.  Return the entire file table.
 The returned data consists of a single  The returned data consists of a single
 .Vt struct filelist  .Vt struct filelist
 followed by an array of  followed by an array of
 .Vt struct file ,  .Vt struct file ,
 whose size depends on the current number of such objects in the system.  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 )
 If  If
 .Xr fork 2  .Xr fork 2
 system call fails due to limit on number of processes (either  system call fails due to limit on number of processes (either
Line 529  error to process.
Line 529  error to process.
 Useful to keep heavily forking runaway processes in bay.  Useful to keep heavily forking runaway processes in bay.
 Default zero (no sleep).  Default zero (no sleep).
 Maximum is 20 seconds.  Maximum is 20 seconds.
 .It Li kern.fscale ( KERN_FSCALE )  .It Li kern.fscale ( Dv KERN_FSCALE )
 The kernel fixed-point scale factor.  The kernel fixed-point scale factor.
 .It Li kern.fsync ( KERN_FSYNC )  .It Li kern.fsync ( Dv KERN_FSYNC )
 Return 1 if the  Return 1 if the
 .St -p1003.1b-93  .St -p1003.1b-93
 File Synchronization Option is available  File Synchronization Option is available
 on this system,  on this system,
 otherwise\ 0.  otherwise\ 0.
 .It Li kern.hardclock_ticks ( KERN_HARDCLOCK_TICKS )  .It Li kern.hardclock_ticks ( Dv KERN_HARDCLOCK_TICKS )
 Returns the number of  Returns the number of
 .Xr hardclock 9  .Xr hardclock 9
 ticks.  ticks.
 .It Li kern.hostid ( KERN_HOSTID )  .It Li kern.hostid ( Dv KERN_HOSTID )
 Get or set the host identifier.  Get or set the host identifier.
 This is aimed to replace the legacy  This is aimed to replace the legacy
 .Xr gethostid 3  .Xr gethostid 3
 and  and
 .Xr sethostid 3  .Xr sethostid 3
 system calls.  system calls.
 .It Li kern.hostname ( KERN_HOSTNAME )  .It Li kern.hostname ( Dv KERN_HOSTNAME )
 Get or set the  Get or set the
 .Xr hostname 1 .  .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  Return the maximum number of
 .Vt iovec  .Vt iovec
 structures that a process has available for use with  structures that a process has available for use with
Line 562  structures that a process has available 
Line 562  structures that a process has available 
 .Xr sendmsg 2  .Xr sendmsg 2
 and  and
 .Xr writev 2 .  .Xr writev 2 .
 .It Li kern.ipc ( KERN_SYSVIPC )  .It Li kern.ipc ( Dv KERN_SYSVIPC )
 Return information about the SysV IPC parameters.  Return information about the SysV IPC parameters.
 The third level names for the ipc variables are detailed below.  The third level names for the ipc variables are detailed below.
 .Bl -column "kern.ipc.shm_use_phys" "integer" "Changeable" -offset indent  .Bl -column "kern.ipc.shm_use_phys" "integer" "Changeable" -offset indent
Line 583  The third level names for the ipc variab
Line 583  The third level names for the ipc variab
 .It kern.ipc.semmnu     integer yes  .It kern.ipc.semmnu     integer yes
 .El  .El
 .Bl -tag -width "123456"  .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  Returns 1 if System V style message queue functionality is available
 on this system,  on this system,
 otherwise\ 0.  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  Returns 1 if System V style semaphore functionality is available
 on this system,  on this system,
 otherwise\ 0.  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  Returns 1 if System V style share memory functionality is available
 on this system,  on this system,
 otherwise\ 0.  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.  Return System V style IPC configuration and run-time information.
 The fourth level name selects the System V style IPC facility.  The fourth level name selects the System V style IPC facility.
 .Bl -column "KERN_SYSVIPC_MSG_INFO" "struct shm_sysctl_info" -offset indent  .Bl -column "KERN_SYSVIPC_MSG_INFO" "struct shm_sysctl_info" -offset indent
Line 624  The
Line 624  The
 structure is defined in  structure is defined in
 .In sys/shm.h .  .In sys/shm.h .
 .El  .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.  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.  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.  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.  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.  Locking of shared memory in physical memory.
 If 0, memory can be swapped  If 0, memory can be swapped
 out, otherwise it will be locked in physical memory.  out, otherwise it will be locked in physical memory.
Line 647  Max number of number of semaphores in sy
Line 647  Max number of number of semaphores in sy
 .It Li kern.ipc.semmnu  .It Li kern.ipc.semmnu
 Max number of undo structures in system.  Max number of undo structures in system.
 .El  .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.  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  The offset within the sector specified by
 .Dv KERN_LABELSECTOR  .Dv KERN_LABELSECTOR
 of the  of the
 .Xr disklabel 5 .  .Xr disklabel 5 .
 .It Li kern.labelsector ( KERN_LABELSECTOR )  .It Li kern.labelsector ( Dv KERN_LABELSECTOR )
 The sector number containing the  The sector number containing the
 .Xr disklabel 5 .  .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,  The size of the storage required for a login name, in bytes,
 including the terminating NUL.  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  If this flag is non-zero, the kernel will
 .Xr log 9  .Xr log 9
 all process exits due to signals which create a  all process exits due to signals which create a
 .Xr core 5  .Xr core 5
 file, and whether the coredump was created.  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  Returns 1 if the
 .St -p1003.1b-93  .St -p1003.1b-93
 Memory Mapped Files Option is available on this system,  Memory Mapped Files Option is available on this system,
 otherwise\ 0.  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.  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.  The maximum number of partitions allowed per disk.
 .It Li kern.maxlwp  .It Li kern.maxlwp
 The maximum number of Lightweight Processes (threads) the system allows  The maximum number of Lightweight Processes (threads) the system allows
 per uid.  per uid.
 .It Li kern.maxphys ( KERN_MAXPHYS )  .It Li kern.maxphys ( Dv KERN_MAXPHYS )
 Maximum raw I/O transfer size.  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.  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.  The maximum number of pseudo terminals.
 This value can be both raised and lowered, though it cannot  This value can be both raised and lowered, though it cannot
 be set lower than number of currently used ptys.  be set lower than number of currently used ptys.
 See also  See also
 .Xr pty 4 .  .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.  The maximum number of vnodes available on the system.
 This can only be raised.  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.  Return information about the mbuf control variables.
 Mbufs are data structures which store network packets and other data  Mbufs are data structures which store network packets and other data
 structures in the networking code, see  structures in the networking code, see
Line 711  privilege may change the value.
Line 711  privilege may change the value.
 .Pp  .Pp
 The variables are as follows:  The variables are as follows:
 .Bl -tag -width "123456"  .Bl -tag -width "123456"
 .It Li kern.mbuf.mblowat ( MBUF_MBLOWAT )  .It Li kern.mbuf.mblowat ( Dv MBUF_MBLOWAT )
 The mbuf low water mark.  The mbuf low water mark.
 .It Li kern.mbuf.mclbytes ( MBUF_MCLBYTES )  .It Li kern.mbuf.mclbytes ( Dv MBUF_MCLBYTES )
 The mbuf cluster size.  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.  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.  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 limit on the number of mbuf clusters.
 The variable can only be increased, and only increased on machines with  The variable can only be increased, and only increased on machines with
 direct-mapped pool pages.  direct-mapped pool pages.
 .El  .El
 .It Li kern.memlock ( KERN_MEMLOCK )  .It Li kern.memlock ( Dv KERN_MEMLOCK )
 Returns 1 if the  Returns 1 if the
 .St -p1003.1b-93  .St -p1003.1b-93
 Process Memory Locking Option is available on this system,  Process Memory Locking Option is available on this system,
 otherwise\ 0.  otherwise\ 0.
 .It Li kern.memlock_range ( KERN_MEMLOCK_RANGE )  .It Li kern.memlock_range ( Dv KERN_MEMLOCK_RANGE )
 Returns 1 if the  Returns 1 if the
 .St -p1003.1b-93  .St -p1003.1b-93
 Range Memory Locking Option is available on this system,  Range Memory Locking Option is available on this system,
 otherwise\ 0.  otherwise\ 0.
 .It Li kern.memory_protection ( KERN_MEMORY_PROTECTION )  .It Li kern.memory_protection ( Dv KERN_MEMORY_PROTECTION )
 Returns 1 if the  Returns 1 if the
 .St -p1003.1b-93  .St -p1003.1b-93
 Memory Protection Option is available on this system,  Memory Protection Option is available on this system,
Line 764  Setting this value to zero disables the 
Line 764  Setting this value to zero disables the 
 A boolean that enables or disables verbose  A boolean that enables or disables verbose
 debug messages related to kernel modules.  debug messages related to kernel modules.
 .El  .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  Returns the standard version the implementation of the
 .St -p1003.1b-93  .St -p1003.1b-93
 Monotonic Clock Option conforms to,  Monotonic Clock Option conforms to,
Line 799  The default maximum message count.
Line 799  The default maximum message count.
 .It Li kern.mqueue.mq_max_maxmsg  .It Li kern.mqueue.mq_max_maxmsg
 The maximum number of messages in a message queue.  The maximum number of messages in a message queue.
 .El  .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  The kernel message buffer, rotated so that the head of the circular kernel
 message buffer is at the start of the returned data.  message buffer is at the start of the returned data.
 The returned data may contain NUL bytes.  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.  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.  The maximum number of supplemental groups.
 .\" .It Li kern.no_sa_support  .\" .It Li kern.no_sa_support
 .\" XXX: Undocumented.  .\" XXX: Undocumented.
 .It Li kern.ntptime ( KERN_NTPTIME )  .It Li kern.ntptime ( Dv KERN_NTPTIME )
 A  A
 .Vt struct ntptimeval  .Vt struct ntptimeval
 structure is returned.  structure is returned.
 This structure contains data used by the  This structure contains data used by the
 .Xr ntpd 8  .Xr ntpd 8
 program.  program.
 .It Li kern.osrelease ( KERN_OSRELEASE )  .It Li kern.osrelease ( Dv KERN_OSRELEASE )
 The system release string.  The system release string.
 .It Li kern.osrevision ( KERN_OSREV )  .It Li kern.osrevision ( Dv KERN_OSREV )
 The system revision string.  The system revision string.
 .It Li kern.ostype ( KERN_OSTYPE )  .It Li kern.ostype ( Dv KERN_OSTYPE )
 The system type string.  The system type string.
 .\".It Li kern.panic_now  .\".It Li kern.panic_now
 .\" XXX: Undocumented.  .\" XXX: Undocumented.
 .It Li kern.pipe ( KERN_PIPE )  .It Li kern.pipe ( Dv KERN_PIPE )
 Pipe settings.  Pipe settings.
 The third level names for the  integer pipe settings is detailed below.  The third level names for the  integer pipe settings is detailed below.
 The changeable column shows whether a process with appropriate  The changeable column shows whether a process with appropriate
Line 840  privilege may change the value.
Line 840  privilege may change the value.
 .Pp  .Pp
 The variables are as follows:  The variables are as follows:
 .Bl -tag -width "123456"  .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.  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  Maximum number of
 .Dq big  .Dq big
 pipes.  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.  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.  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  Number of
 .Dq big  .Dq big
 pipes.  pipes.
Line 863  and
Line 863  and
 subsystems.  subsystems.
 .\" XXX: Undocumented .It Li kern.posix ( ? )  .\" XXX: Undocumented .It Li kern.posix ( ? )
 .\"      This is a node in which the only variable is semmax.  .\"      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  The version of ISO/IEC 9945
 .Pq St -p1003.1  .Pq St -p1003.1
 with which the system attempts to comply.  with which the system attempts to comply.
Line 871  with which the system attempts to comply
Line 871  with which the system attempts to comply
 The version of  The version of
 .St -p1003.1  .St -p1003.1
 and its Asynchronous I/O option to which the system attempts to conform.  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  The version of
 .St -p1003.1  .St -p1003.1
 and its  and its
 Barriers  Barriers
 option to which the system attempts to conform,  option to which the system attempts to conform,
 otherwise\ 0.  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  The version of
 .St -p1003.1  .St -p1003.1
 and its  and its
Line 887  option to which the system attempts to c
Line 887  option to which the system attempts to c
 otherwise\ 0.  otherwise\ 0.
 .\".It Li kern.posix_sched  .\".It Li kern.posix_sched
 .\" XXX: Undocumented.  .\" XXX: Undocumented.
 .It Li kern.posix_semaphores ( KERN_POSIX_SEMAPHORES )  .It Li kern.posix_semaphores ( Dv KERN_POSIX_SEMAPHORES )
 The version of  The version of
 .St -p1003.1  .St -p1003.1
 and its  and its
 Semaphores  Semaphores
 option to which the system attempts to conform,  option to which the system attempts to conform,
 otherwise\ 0.  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  The version of
 .St -p1003.1  .St -p1003.1
 and its  and its
 Spin Locks  Spin Locks
 option to which the system attempts to conform,  option to which the system attempts to conform,
 otherwise\ 0.  otherwise\ 0.
 .It Li kern.posix_threads ( KERN_POSIX_THREADS )  .It Li kern.posix_threads ( Dv KERN_POSIX_THREADS )
 The version of  The version of
 .St -p1003.1  .St -p1003.1
 and its  and its
 Threads  Threads
 option to which the system attempts to conform,  option to which the system attempts to conform,
 otherwise\ 0.  otherwise\ 0.
 .It Li kern.posix_timers ( KERN_POSIX_TIMERS )  .It Li kern.posix_timers ( Dv KERN_POSIX_TIMERS )
 The version of  The version of
 .St -p1003.1  .St -p1003.1
 and its  and its
 Timers  Timers
 option to which the system attempts to conform,  option to which the system attempts to conform,
 otherwise\ 0.  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.  Return the entire process table, or a subset of it.
 An array of  An array of
 .Vt struct kinfo_proc  .Vt struct kinfo_proc
Line 934  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_TTY       A tty device
 .It KERN_PROC_UID       A user ID  .It KERN_PROC_UID       A user ID
 .El  .El
 .It Li kern.proc2 ( KERN_PROC2 )  .It Li kern.proc2 ( Dv KERN_PROC2 )
 As for  As for
 .Dv KERN_PROC ,  .Dv KERN_PROC ,
 but an array of  but an array of
Line 943  structures are returned.
Line 943  structures are returned.
 The fifth level name is the size of the  The fifth level name is the size of the
 .Vt struct kinfo_proc2  .Vt struct kinfo_proc2
 and the sixth level name is the number of structures to return.  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)  Return the argv or environment strings (or the number thereof)
 of a process.  of a process.
 Multiple strings are returned separated by NUL characters.  Multiple strings are returned separated by NUL characters.
Line 955  The fourth level name is as follows:
Line 955  The fourth level name is as follows:
 .It KERN_PROC_NARGV     The number of argv strings  .It KERN_PROC_NARGV     The number of argv strings
 .It KERN_PROC_NENV      The number of environ strings  .It KERN_PROC_NENV      The number of environ strings
 .El  .El
 .It Li kern.profiling ( KERN_PROF )  .It Li kern.profiling ( Dv KERN_PROF )
 Return profiling information about the kernel.  Return profiling information about the kernel.
 If the kernel is not compiled for profiling,  If the kernel is not compiled for profiling,
 attempts to retrieve any of the  attempts to retrieve any of the
Line 977  privilege may change the value.
Line 977  privilege may change the value.
 .Pp  .Pp
 The variables are as follows:  The variables are as follows:
 .Bl -tag -width "123456"  .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.  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.  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.  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.  Profiling state.
 If set to  If set to
 .Dv GMON_PROF_ON ,  .Dv GMON_PROF_ON ,
Line 991  starts profiling.
Line 991  starts profiling.
 If set to  If set to
 .Dv GMON_PROF_OFF ,  .Dv GMON_PROF_OFF ,
 stops profiling.  stops profiling.
 .It Li kern.profiling.tos ( GPROF_TOS )  .It Li kern.profiling.tos ( Dv GPROF_TOS )
 Array of  Array of
 .Vt struct tostruct  .Vt struct tostruct
 describing destination of calls and their counts.  describing destination of calls and their counts.
 .El  .El
 .\" .It Li kern.pset  .\" .It Li kern.pset
 .\" XXX: Undocumented.  .\" XXX: Undocumented.
 .It Li kern.rawpartition ( KERN_RAWPARTITION )  .It Li kern.rawpartition ( Dv KERN_RAWPARTITION )
 The raw partition of a disk (a == 0).  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.,  The name of the root device (e.g.,
 .Dq wd0 ) .  .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).  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.  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.  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.  Maximum socket buffer size.
 .\" XXX units?  .\" XXX units?
 .It Li kern.securelevel ( KERN_SECURELVL )  .It Li kern.securelevel ( Dv KERN_SECURELVL )
 See  See
 .Xr secmodel_securelevel 9 .  .Xr secmodel_securelevel 9 .
 .\" .It Li kern.sched  .\" .It Li kern.sched
 .\" XXX: Undocumented.  .\" 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.  Maximum amount of kernel memory to be used for socket buffers.
 .\" XXX units?  .\" XXX units?
 .It Li kern.synchronized_io ( KERN_SYNCHRONIZED_IO )  .It Li kern.synchronized_io ( Dv KERN_SYNCHRONIZED_IO )
 Returns 1 if the  Returns 1 if the
 .St -p1003.1b-93  .St -p1003.1b-93
 Synchronized I/O Option is available on this system,  Synchronized I/O Option is available on this system,
Line 1043  The currently selected timecounter sourc
Line 1043  The currently selected timecounter sourc
 .It Li kern.timecounter.timestepwarnings ( dynamic )  .It Li kern.timecounter.timestepwarnings ( dynamic )
 If non-zero display a message each time the time is stepped.  If non-zero display a message each time the time is stepped.
 .El  .El
 .It Li kern.timex ( KERN_TIMEX )  .It Li kern.timex ( Dv KERN_TIMEX )
 Not available.  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  Return information about the number of characters sent and received
 on ttys.  on ttys.
 The third level names for the tty statistic variables are detailed below.  The third level names for the tty statistic variables are detailed below.
Line 1061  with appropriate privilege may change th
Line 1061  with appropriate privilege may change th
 .Pp  .Pp
 The variables are as follows:  The variables are as follows:
 .Bl -tag -width "123456"  .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.  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.  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.  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.  The number of raw input characters.
 .El  .El
 .It Li kern.tty  .It Li kern.tty
Line 1109  Number of locks held by the current user
Line 1109  Number of locks held by the current user
 .It Li kern.uidinfo.sbsize  .It Li kern.uidinfo.sbsize
 Number of bytes in socket buffers allocated to the current user.  Number of bytes in socket buffers allocated to the current user.
 .El  .El
 .It Li kern.urandom ( KERN_URND )  .It Li kern.urandom ( Dv KERN_URND )
 Random integer value.  Random integer value.
 .It Li kern.usercrypto  .It Li kern.usercrypto
 When enabled, allows userland to  When enabled, allows userland to
Line 1158  If 1, more messages will be printed (ie.
Line 1158  If 1, more messages will be printed (ie.
 fingerprint is accessed).  fingerprint is accessed).
 Verbose level 2 is debug mode.  Verbose level 2 is debug mode.
 .El  .El
 .It Li kern.version ( KERN_VERSION )  .It Li kern.version ( Dv KERN_VERSION )
 The system version string.  The system version string.
 .It Li kern.vnode ( KERN_VNODE )  .It Li kern.vnode ( Dv KERN_VNODE )
 Return the entire vnode table.  Return the entire vnode table.
 Note, the vnode table is not necessarily a consistent snapshot of  Note, the vnode table is not necessarily a consistent snapshot of
 the system.  the system.
Line 1196  protocol number, though this is not alwa
Line 1196  protocol number, though this is not alwa
 .It net.key     IPsec key management values     yes  .It net.key     IPsec key management values     yes
 .El  .El
 .Bl -tag -width "123456"  .Bl -tag -width "123456"
 .It Li net.route ( PF_ROUTE )  .It Li net.route ( Dv PF_ROUTE )
 .\" XXX really?  .\" XXX really?
 Return the entire routing table or a subset of it.  Return the entire routing table or a subset of it.
 The data is returned as a sequence of routing messages (see  The data is returned as a sequence of routing messages (see
Line 1214  The fifth and sixth level names are as f
Line 1214  The fifth and sixth level names are as f
 .It NET_RT_DUMP None  .It NET_RT_DUMP None
 .It NET_RT_IFLIST       None  .It NET_RT_IFLIST       None
 .El  .El
 .It Li net.inet ( PF_INET )  .It Li net.inet ( Dv PF_INET )
 Get or set various global information about the IPv4  Get or set various global information about the IPv4
 .Pq Internet Protocol version 4 .  .Pq Internet Protocol version 4 .
 The third level name is the protocol.  The third level name is the protocol.
Line 1596  The default UDP send buffer size.
Line 1596  The default UDP send buffer size.
 .Pp  .Pp
 For variables net.*.ipsec, please refer to  For variables net.*.ipsec, please refer to
 .Xr ipsec 4 .  .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  Get or set various global information about the IPv6
 .Pq Internet Protocol version 6 .  .Pq Internet Protocol version 6 .
 The third level name is the protocol.  The third level name is the protocol.
Line 1894  Please refer to
Line 1894  Please refer to
 section above.  section above.
 For variables net.*.ipsec6, please refer to  For variables net.*.ipsec6, please refer to
 .Xr ipsec 4 .  .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.  Get or set various global information about the IPsec key management.
 The third level name is the variable name.  The third level name is the variable name.
 The currently defined variable and names are:  The currently defined variable and names are:
Line 1987  points to the current process, or the PI
Line 1987  points to the current process, or the PI
 .It proc.pid.stopexit   int     yes  .It proc.pid.stopexit   int     yes
 .El  .El
 .Bl -tag -width "123456"  .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  The template used for the core dump file name (see
 .Xr core 5  .Xr core 5
 for details).  for details).
Line 1998  or end with the suffix
Line 1998  or end with the suffix
 (the super-user may set arbitrary names).  (the super-user may set arbitrary names).
 By default it points to  By default it points to
 .Dv KERN_DEFCORENAME .  .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  Return resources limits, as defined for the
 .Xr getrlimit 2  .Xr getrlimit 2
 and  and
Line 2006  and
Line 2006  and
 system calls.  system calls.
 The fourth level name is one of:  The fourth level name is one of:
 .Bl -tag -width "123456"  .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.  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.  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;  The maximum size (in bytes) of the data segment for a process;
 this defines how far a program may extend its break with the  this defines how far a program may extend its break with the
 .Xr sbrk 2  .Xr sbrk 2
 system call.  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;  The maximum size (in bytes) of the stack segment for a process;
 this defines how far a program's stack segment may be extended.  this defines how far a program's stack segment may be extended.
 Stack extension is performed automatically by the system.  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)  The largest size (in bytes)
 .Pa core  .Pa core
 file that may be created.  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  The maximum size (in bytes) to which a process's resident set size may
 grow.  grow.
 This imposes a limit on the amount of physical memory to be given to  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  a process; if memory is tight, the system will prefer to take memory
 from processes that are exceeding their declared resident set size.  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  The maximum size (in bytes) which a process may lock into memory
 using the  using the
 .Xr mlock 2  .Xr mlock 2
 function.  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.  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.  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  The maximum size (in bytes) of the socket buffers
 set by the  set by the
 .Xr setsockopt 2  .Xr setsockopt 2
Line 2046  set by the
Line 2046  set by the
 and  and
 .Dv SO_SNDBUF  .Dv SO_SNDBUF
 options.  options.
 .It Li proc.pid.rlimit.vmemoryuse ( PROC_PID_LIMIT_AS )  .It Li proc.pid.rlimit.vmemoryuse ( Dv PROC_PID_LIMIT_AS )
 The maximum size (in bytes) which a process can obtain.  The maximum size (in bytes) which a process can obtain.
 .It Li proc.pid.rlimit.maxlwp ( PROC_PID_LIMIT_NTHR )  .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 maximum number of threads that cen be created and running at one time in
 the process.  the process.
 The first thread of each process is not counted against this.  The first thread of each process is not counted against this.
 .El  .El
 .Pp  .Pp
 The fifth level name is one of  The fifth level name is one of
 .Li soft ( PROC_PID_LIMIT_TYPE_SOFT )  .Li soft ( Dv PROC_PID_LIMIT_TYPE_SOFT )
 or  or
 .Li hard ( PROC_PID_LIMIT_TYPE_HARD ) ,  .Li hard ( Dv PROC_PID_LIMIT_TYPE_HARD ) ,
 to select respectively the soft or hard limit.  to select respectively the soft or hard limit.
 Both are of type integer.  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  If non zero, the process' children will be stopped after
 .Xr fork 2  .Xr fork 2
 calls.  calls.
Line 2075  apply to emulation specific system calls
Line 2075  apply to emulation specific system calls
 .Fn sproc  .Fn sproc
 or  or
 .Fn clone .  .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  If non zero, the process will be stopped on next
 .Xr exec 3  .Xr exec 3
 call.  call.
Line 2088  This feature helps attaching a process w
Line 2088  This feature helps attaching a process w
 before it had the opportunity to actually do anything.  before it had the opportunity to actually do anything.
 .Pp  .Pp
 This value is inherited by the process's children.  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,  If non zero, the process will be stopped on when it has cause to exit,
 either by way of calling  either by way of calling
 .Xr exit 3 ,  .Xr exit 3 ,
Line 2106  before it disappears.
Line 2106  before it disappears.
 .Pp  .Pp
 This value is also inherited by the process's children.  This value is also inherited by the process's children.
 .El  .El
 .Ss The user.* subtree ( CTL_USER )  .Ss The user.* subtree ( Dv CTL_USER )
 The string and integer information available for the  The string and integer information available for the
 .Li user  .Li user
 level is detailed below.  level is detailed below.
Line 2138  privilege may change the value.
Line 2138  privilege may change the value.
 .It user.tzname_max     integer no  .It user.tzname_max     integer no
 .El  .El
 .Bl -tag -width "123456"  .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  The maximum number of functions that may be registered with
 .Xr atexit 3 .  .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  The maximum ibase/obase values in the
 .Xr bc 1  .Xr bc 1
 utility.  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  The maximum array size in the
 .Xr bc 1  .Xr bc 1
 utility.  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  The maximum scale value in the
 .Xr bc 1  .Xr bc 1
 utility.  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  The maximum string length in the
 .Xr bc 1  .Xr bc 1
 utility.  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 maximum number of weights that can be assigned to any entry of
 the LC_COLLATE order keyword in the locale definition file.  the LC_COLLATE order keyword in the locale definition file.
 .It Li user.cs_path ( USER_CS_PATH )  .It Li user.cs_path ( USER_CS_PATH )
 Return a value for the  Return a value for the
 .Ev PATH  .Ev PATH
 environment variable that finds all the standard utilities.  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  The maximum number of expressions that can be nested within
 parenthesis by the  parenthesis by the
 .Xr expr 1  .Xr expr 1
 utility.  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  The maximum length in bytes of a text-processing utility's input
 line.  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  Return 1 if the system supports at least one terminal type capable of
 all operations described in  all operations described in
 .St -p1003.2 ,  .St -p1003.2 ,
 otherwise\ 0.  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  Return 1 if the system's C-language development facilities support the
 C-Language Bindings Option, otherwise\ 0.  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,  Return 1 if the system supports the C-Language Development Utilities Option,
 otherwise\ 0.  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,  Return 1 if the system supports the FORTRAN Development Utilities Option,
 otherwise\ 0.  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,  Return 1 if the system supports the FORTRAN Runtime Utilities Option,
 otherwise\ 0.  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.  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,  Return 1 if the system supports the Software Development Utilities Option,
 otherwise\ 0.  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,  Return 1 if the system supports the User Portability Utilities Option,
 otherwise\ 0.  otherwise\ 0.
 .It Li user.posix2_version ( USER_POSIX2_VERSION )  .It Li user.posix2_version ( Dv USER_POSIX2_VERSION )
 The version of  The version of
 .St -p1003.2  .St -p1003.2
 with which the system attempts to comply.  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  The maximum number of repeated occurrences of a regular expression
 permitted when using interval notation.  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  The minimum maximum number of streams that a process may have open
 at any one time.  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  The minimum maximum number of types supported for the name of a
 timezone.  timezone.
 .El  .El
 .Ss The vm.* subtree ( CTL_VM )  .Ss The vm.* subtree ( Dv CTL_VM )
 The string and integer information available for the  The string and integer information available for the
 .Li vm  .Li vm
 level is detailed below.  level is detailed below.
Line 2238  privilege may change the value.
Line 2238  privilege may change the value.
 .It vm.vmmeter  struct vmtotal  no  .It vm.vmmeter  struct vmtotal  no
 .El  .El
 .Bl -tag -width "123456"  .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  The percentage of physical memory which will be reclaimed
 from other types of memory usage to store anonymous application data.  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  The percentage of physical memory which will be always be available for
 anonymous application data.  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  The percentage of physical memory which will be available
 for the buffer cache.  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.  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  The minimum amount of kernel memory to reserve for the
 buffer cache.  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  The maximum amount of kernel memory to be used for the
 buffer cache.  buffer cache.
 .It Li vm.execmax ( VM_EXECMAX )  .It Li vm.execmax ( Dv VM_EXECMAX )
 The percentage of physical memory which will be reclaimed  The percentage of physical memory which will be reclaimed
 from other types of memory usage to store cached executable data.  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  The percentage of physical memory which will be always be available for
 cached executable data.  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  The percentage of physical memory which will be reclaimed
 from other types of memory usage to store cached file data.  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  The percentage of physical memory which will be always be available for
 cached file data.  cached file data.
 .It Li vm.loadavg ( VM_LOADAVG )  .It Li vm.loadavg ( Dv VM_LOADAVG )
 Return the load average history.  Return the load average history.
 The returned data consists of a  The returned data consists of a
 .Vt struct loadavg .  .Vt struct loadavg .
 .It Li vm.maxslp ( VM_MAXSLP )  .It Li vm.maxslp ( Dv VM_MAXSLP )
 The value of the maxslp kernel global variable.  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.  Return system wide virtual memory statistics.
 The returned data consists of a  The returned data consists of a
 .Vt struct vmtotal .  .Vt struct vmtotal .
 .It vm.user_va0_disable  .It vm.user_va0_disable
 A flag which controls whether user processes can map virtual address\ 0.  A flag which controls whether user processes can map virtual address\ 0.
 .It Li vm.uspace ( VM_USPACE )  .It Li vm.uspace ( Dv VM_USPACE )
 The number of bytes allocated for each kernel stack.  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.  Return system wide virtual memory statistics.
 The returned data consists of a  The returned data consists of a
 .Vt struct uvmexp .  .Vt struct uvmexp .
 .It Li vm.uvmexp2 ( VM_UVMEXP2 )  .It Li vm.uvmexp2 ( Dv VM_UVMEXP2 )
 Return system wide virtual memory statistics.  Return system wide virtual memory statistics.
 The returned data consists of a  The returned data consists of a
 .Vt struct uvmexp_sysctl .  .Vt struct uvmexp_sysctl .
 .\" XXX vm.idlezero  .\" XXX vm.idlezero
 .El  .El
 .Ss The ddb.* subtree ( CTL_DDB )  .Ss The ddb.* subtree ( Dv CTL_DDB )
 The information available for the  The information available for the
 .Li ddb  .Li ddb
 level is detailed below.  level is detailed below.
Line 2311  privilege may change the value.
Line 2311  privilege may change the value.
 .It ddb.commandonenter  string  yes  .It ddb.commandonenter  string  yes
 .El  .El
 .Bl -tag -width "123456"  .Bl -tag -width "123456"
 .It Li ddb.radix ( DDBCTL_RADIX )  .It Li ddb.radix ( Dv DDBCTL_RADIX )
 The input and output radix.  The input and output radix.
 .It Li ddb.maxoff ( DDBCTL_MAXOFF )  .It Li ddb.maxoff ( Dv DDBCTL_MAXOFF )
 The maximum symbol offset.  The maximum symbol offset.
 .It Li ddb.maxwidth ( DDBCTL_MAXWIDTH )  .It Li ddb.maxwidth ( Dv DDBCTL_MAXWIDTH )
 The maximum output line width.  The maximum output line width.
 .It Li ddb.lines ( DDBCTL_LINES )  .It Li ddb.lines ( Dv DDBCTL_LINES )
 Number of display lines.  Number of display lines.
 .It Li ddb.tabstops ( DDBCTL_TABSTOPS )  .It Li ddb.tabstops ( Dv DDBCTL_TABSTOPS )
 Tab width.  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.  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  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.  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  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  reboot, while a value of \-1 means neither a stack trace will be printed
 nor DDB entered.  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  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.  console or by a special key sequence on a graphics console.
 .It Li ddb.tee_msgbuf  .It Li ddb.tee_msgbuf
Line 2347  nodes are also available as variables fr
Line 2347  nodes are also available as variables fr
 See  See
 .Xr ddb 4  .Xr ddb 4
 for more details.  for more details.
 .Ss The security.* subtree ( CTL_SECURITY )  .Ss The security.* subtree ( Dv CTL_SECURITY )
 The  The
 .Li security  .Li security
 level contains various security-related settings for  level contains various security-related settings for
Line 2487  Number of seconds to suspend a user from
Line 2487  Number of seconds to suspend a user from
 limit was exceeded.  limit was exceeded.
 .El  .El
 .El  .El
 .Ss The vendor.* subtree ( CTL_VENDOR )  .Ss The vendor.* subtree ( Dv CTL_VENDOR )
 The  The
 .Li vendor  .Li vendor
 toplevel name is reserved to be used by vendors who wish to  toplevel name is reserved to be used by vendors who wish to

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Removed from v.1.90  
changed lines
  Added in v.1.91

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