--- Libc/Libc-1725.40.4/gen/FreeBSD/sysctl.3
+++ /dev/null
@@ -1,727 +0,0 @@
-.\" Copyright (c) 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"	@(#)sysctl.3	8.4 (Berkeley) 5/9/95
-.\" $FreeBSD$
-.\"
-.Dd May 17, 2013
-.Dt SYSCTL 3
-.Os
-.Sh NAME
-.Nm sysctl ,
-.Nm sysctlbyname ,
-.Nm sysctlnametomib
-.Nd get or set system information
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In sys/types.h
-.In sys/sysctl.h
-.Ft int
-.Fn sysctl "int *name" "u_int namelen" "void *oldp" "size_t *oldlenp" "void *newp" "size_t newlen"
-.Ft int
-.Fn sysctlbyname "const char *name" "void *oldp" "size_t *oldlenp" "void *newp" "size_t newlen"
-.Ft int
-.Fn sysctlnametomib "const char *name" "int *mibp" "size_t *sizep"
-.Sh DESCRIPTION
-The
-.Fn sysctl
-function retrieves system information and allows processes with
-appropriate privileges to set system information.
-The information available from
-.Fn sysctl
-consists of integers, strings, and tables.
-Information may be retrieved and set from the command interface
-using the
-.Xr sysctl 8
-utility.
-.Pp
-Unless explicitly noted below,
-.Fn sysctl
-returns a consistent snapshot of the data requested.
-Consistency is obtained by locking the destination
-buffer into memory so that the data may be copied out without blocking.
-Calls to
-.Fn sysctl
-are serialized to avoid deadlock.
-.Pp
-The state is described using a ``Management Information Base'' (MIB)
-style name, listed in
-.Fa name ,
-which is a
-.Fa namelen
-length array of integers.
-.Pp
-The
-.Fn sysctlbyname
-function accepts an ASCII representation of the name and internally
-looks up the integer name vector.
-Apart from that, it behaves the same
-as the standard
-.Fn sysctl
-function.
-.Pp
-The information is copied into the buffer specified by
-.Fa oldp .
-The size of the buffer is given by the location specified by
-.Fa oldlenp
-before the call,
-and that location gives the amount of data copied after a successful call
-and after a call that returns with the error code
-.Er ENOMEM .
-If the amount of data available is greater
-than the size of the buffer supplied,
-the call supplies as much data as fits in the buffer provided
-and returns with the error code
-.Er ENOMEM .
-If the old value is not desired,
-.Fa oldp
-and
-.Fa oldlenp
-should be set to NULL.
-.Pp
-The size of the available data can be determined by calling
-.Fn sysctl
-with the
-.Dv NULL
-argument for
-.Fa oldp .
-The size of the available data will be returned in the location pointed to by
-.Fa oldlenp .
-For some operations, the amount of space may change often.
-For these operations,
-the system attempts to round up so that the returned size is
-large enough for a call to return the data shortly thereafter.
-.Pp
-To set a new value,
-.Fa newp
-is set to point to a buffer of length
-.Fa newlen
-from which the requested value is to be taken.
-If a new value is not to be set,
-.Fa newp
-should be set to NULL and
-.Fa newlen
-set to 0.
-.Pp
-The
-.Fn sysctlnametomib
-function accepts an ASCII representation of the name,
-looks up the integer name vector,
-and returns the numeric representation in the mib array pointed to by
-.Fa mibp .
-The number of elements in the mib array is given by the location specified by
-.Fa sizep
-before the call,
-and that location gives the number of entries copied after a successful call.
-The resulting
-.Fa mib
-and
-.Fa size
-may be used in subsequent
-.Fn sysctl
-calls to get the data associated with the requested ASCII name.
-This interface is intended for use by applications that want to
-repeatedly request the same variable (the
-.Fn sysctl
-function runs in about a third the time as the same request made via the
-.Fn sysctlbyname
-function).
-.Pp
-The top level names are defined with a CTL_ prefix in
-.In sys/sysctl.h ,
-and are as follows.
-The next and subsequent levels down are found in the include files
-listed here, and described in separate sections below.
-.Bl -column CTLXMACHDEPXXX "Next level namesXXXXXX" -offset indent
-.It Sy "Name	Next level names	Description"
-.It "CTL_DEBUG	sys/sysctl.h	Debugging"
-.It "CTL_VFS	sys/mount.h	File system"
-.It "CTL_HW	sys/sysctl.h	Generic CPU, I/O"
-.It "CTL_KERN	sys/sysctl.h	High kernel limits"
-.It "CTL_MACHDEP	sys/sysctl.h	Machine dependent"
-.It "CTL_NET	sys/socket.h	Networking"
-.It "CTL_USER	sys/sysctl.h	User-level"
-.It "CTL_VM	sys/resources.h	Virtual memory (struct loadavg)"
-.El
-.Pp
-For example, the following retrieves the maximum number of processes allowed
-in the system:
-.Pp
-.Bd -literal -offset indent -compact
-int maxproc;
-size_t len = sizeof(maxproc);
-sysctlbyname("kern.maxproc", &maxproc, &len, NULL, 0);
-.Ed
-.Pp
-To retrieve the standard search path for the system utilities:
-.Pp
-.Bd -literal -offset indent -compact
-char *p;
-size_t len;
-sysctlbyname("user.cs_path", NULL, &len, NULL, 0);
-p = malloc(len);
-sysctlbyname("user.cs_path", p, &len, NULL, 0);
-.Ed
-.Ss CTL_VFS
-A distinguished second level name, VFS_GENERIC,
-is used to get general information about all file systems.
-One of its third level identifiers is VFS_MAXTYPENUM
-that gives the highest valid file system type number.
-Its other third level identifier is VFS_CONF that
-returns configuration information about the file system
-type given as a fourth level identifier (see
-.Xr getvfsbyname 3
-as an example of its use).
-The remaining second level identifiers are the
-file system type number returned by a
-.Xr statfs 2
-call or from VFS_CONF.
-The third level identifiers available for each file system
-are given in the header file that defines the mount
-argument structure for that file system.
-.Ss CTL_HW
-The string and integer information available for the CTL_HW level
-is detailed below.
-The changeable column shows whether a process with appropriate
-privilege may change the value.
-.Bl -column "xxxxxxxxxxxxxxxxxxxxxxxxx" "xxxxxxxxxx" -offset indent
-.It Sy "Name	Type	Changeable"
-.It "hw.activecpu	int32_t	no"
-.It "hw.byteorder	int32_t	no"
-.It "hw.cacheconfig	uint64_t[] 	no"
-.It "hw.cachelinesize	int64_t	no"
-.It "hw.cachesize	uint64_t[] 	no"
-.It "hw.cpu64bit_capable	int32_t	no"
-.It "hw.cpufamily	uint32_t	no"
-.It "hw.cpufrequency	int64_t	no"
-.It "hw.cpufrequency_max	int64_t	no"
-.It "hw.cpufrequency_min	int64_t	no"
-.It "hw.cpusubtype	int32_t	no"
-.It "hw.cputhreadtype	int32_t	no"
-.It "hw.cputype	int32_t	no"
-.It "hw.l1dcachesize	int64_t	no"
-.It "hw.l1icachesize	int64_t	no"
-.It "hw.l2cachesize	int64_t	no"
-.It "hw.l3cachesize	int64_t	no"
-.It "hw.logicalcpu	int32_t	no"
-.It "hw.logicalcpu_max	int32_t	no"
-.It "hw.machine	char[]	no"
-.It "hw.memsize	int64_t	no"
-.It "hw.model	char[]	no"
-.It "hw.ncpu	int32_t	no"
-.It "hw.packages	int32_t	no"
-.It "hw.pagesize	int64_t	no"
-.It "hw.physicalcpu	int32_t	no"
-.It "hw.physicalcpu_max	int32_t	no"
-.It "hw.tbfrequency	int64_t	no"
-.El
-.Bl -tag -width 6n
-.It Li "hw.byteorder"
-The byte order (4321 or 1234).
-.It Li "hw.model"
-The machine model.
-.It Li "hw.ncpu"
-The number of cpus. This attribute is deprecated and it is recommended that
-.Va "hw.logicalcpu" ,
-.Va "hw.logicalcpu_max" ,
-.Va "hw.physicalcpu" ,
-or
-.Va "hw.physicalcpu_max"
-be used instead.
-.It Li "hw.logicalcpu"
-The number of logical processors available in the current power management mode.
-.It Li "hw.logicalcpu_max"
-The maximum number of logical processors that could be available this boot.
-.It Li "hw.physicalcpu"
-The number of physical processors available in the current power management mode.
-.It Li "hw.physicalcpu_max"
-The maximum number of physical processors that could be available this boot.
-.It Li "hw.pagesize"
-The software page size in bytes.
-.El
-.Ss CTL_KERN
-The string and integer information available for the CTL_KERN level
-is detailed below.
-The changeable column shows whether a process with appropriate
-privilege may change the value.
-The types of data currently available are process information,
-system vnodes, the open file entries, routing table entries,
-virtual memory statistics, load average history, and clock rate
-information.
-.Bl -column "xxxxxxxxxxxxxxxxxxxxxxxxx" "xxxxxxxxxxxxxxxxxxxx" -offset indent
-.It Sy "Name	Type	Changeable"
-.It "kern.argmax	int32_t	no"
-.It "kern.bootargs	char[]	no"
-.It "kern.boottime	struct timeval	no"
-.It "kern.check_openevt	int32_t	yes"
-.It "kern.clockrate	struct clockinfo	no"
-.It "kern.coredump	int32_t	yes"
-.It "kern.corefile	char[]	yes"
-.It "kern.flush_cache_on_write	int32_t	yes"
-.It "kern.hostid	int32_t	yes"
-.It "kern.hostname	char[]	yes"
-.It "kern.job_control	int32_t	no"
-.It "kern.maxfiles	int32_t	yes"
-.It "kern.maxfilesperproc	int32_t	yes"
-.It "kern.maxnbuf	int32_t	yes"
-.It "kern.maxproc	int32_t	yes"
-.It "kern.maxprocperuid	int32_t	yes"
-.It "kern.maxvnodes	int32_t	yes"
-.It "kern.msgbuf	int32_t	yes"
-.It "kern.nbuf	int32_t	no"
-.It "kern.netboot	int32_t	no"
-.It "kern.ngroups	int32_t	no"
-.It "kern.nisdomainname	char[]	yes"
-.It "kern.num_files	int32_t	no"
-.It "kern.num_tasks	int32_t	no"
-.It "kern.num_taskthreads	int32_t	no"
-.It "kern.num_threads	int32_t	no"
-.It "kern.num_vnodes	int32_t	no"
-.It "kern.nx	int32_t	yes"
-.It "kern.osrelease	char[]	no"
-.It "kern.osrevision	int32_t	no"
-.It "kern.ostype	char[]	no"
-.It "kern.osversion	char[]	yes"
-.It "kern.posix1version	int32_t	no"
-.It "kern.procname	char[]	yes"
-.It "kern.safeboot	int32_t	no"
-.It "kern.saved_ids	int32_t	no"
-.It "kern.secure_kernel	int32_t	no"
-.It "kern.securelevel	int32_t	yes"
-.It "kern.singleuser	int32_t	no"
-.It "kern.sleeptime	struct timeval	no"
-.It "kern.slide	int32_t	no"
-.It "kern.stack_depth_max	int32_t	no"
-.It "kern.stack_size	int32_t	no"
-.It "kern.sugid_coredump	int32_t	yes"
-.It "kern.sugid_scripts	int32_t	yes"
-.It "kern.symfile	char[]	no"
-.It "kern.usrstack	int32_t	no"
-.It "kern.usrstack64	int64_t	no"
-.It "kern.uuid	char[]	no"
-.It "kern.version	char[]	no"
-.It "kern.waketime	struct timeval	no"
-.El
-.Bl -tag -width 6n
-.It Li "kern.argmax"
-The maximum bytes of argument to
-.Xr execve 2 .
-.It Li "kern.boottime"
-A
-.Va struct timeval
-structure is returned.
-This structure contains the time that the system was booted.
-.It Li "kern.clockrate"
-A
-.Va struct clockinfo
-structure is returned.
-This structure contains the clock, statistics clock and profiling clock
-frequencies, the number of micro-seconds per hz tick and the skew rate.
-.It Li "kern.hostid"
-Get or set the host id.
-.It Li "kern.hostname"
-Get or set the hostname.
-.It Li "kern.job_control"
-Return 1 if job control is available on this system, otherwise 0.
-.It Li "kern.maxfiles"
-The maximum number of files that may be open in the system.
-.It Li "kern.maxfilesperproc"
-The maximum number of files that may be open for a single process.
-This limit only applies to processes with an effective uid of nonzero
-at the time of the open request.
-Files that have already been opened are not affected if the limit
-or the effective uid is changed.
-.It Li "kern.maxproc"
-The maximum number of concurrent processes the system will allow.
-.It Li "kern.maxprocperuid"
-The maximum number of concurrent processes the system will allow
-for a single effective uid.
-This limit only applies to processes with an effective uid of nonzero
-at the time of a fork request.
-Processes that have already been started are not affected if the limit
-is changed.
-.It Li "kern.maxvnodes"
-The maximum number of vnodes available on the system.
-.It Li "kern.ngroups"
-The maximum number of supplemental groups.
-.It Li "kern.nisdomainname"
-The name of the current YP/NIS domain.
-.It Li "kern.osrelease"
-The system release string.
-.It Li "kern.osrevision"
-The system revision number.
-.It Li "kern.ostype"
-The system type string.
-.It Li "kern.posix1version"
-The version of
-.St -p1003.1
-with which the system
-attempts to comply.
-.It Li "kern.saved_ids"
-Returns 1 if saved set-group and saved set-user ID is available.
-.It Li "kern.securelevel"
-The system security level.
-This level may be raised by processes with appropriate privilege.
-It may not be lowered.
-.It Li "kern.version"
-The system version string.
-.El
-.Ss CTL_MACHDEP
-The set of variables defined is architecture dependent.
-The following variables are defined for the i386 architecture.
-.Bl -column "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" "xxxxxxxxxx" -offset indent
-.It Sy "Name	Type	Changeable"
-.It "machdep.cpu.address_bits.physical	int32_t	no"
-.It "machdep.cpu.address_bits.virtual	int32_t	no"
-.It "machdep.cpu.brand	int32_t	no"
-.It "machdep.cpu.brand_string	char[]	no"
-.It "machdep.cpu.cache.L2_associativity	int32_t	no"
-.It "machdep.cpu.cache.linesize	int32_t	no"
-.It "machdep.cpu.cache.size	int32_t	no"
-.It "machdep.cpu.core_count	int32_t	no"
-.It "machdep.cpu.cores_per_package	int32_t	no"
-.It "machdep.cpu.extfamily	int32_t	no"
-.It "machdep.cpu.extfeature_bits	int64_t	no"
-.It "machdep.cpu.extfeatures	char[]	no"
-.It "machdep.cpu.extmodel	int32_t	no"
-.It "machdep.cpu.family	int32_t	no"
-.It "machdep.cpu.feature_bits	int64_t	no"
-.It "machdep.cpu.features	char[]	no"
-.It "machdep.cpu.leaf7_feature_bits	uint32_t	no"
-.It "machdep.cpu.leaf7_features	char[]	no"
-.It "machdep.cpu.logical_per_package	int32_t	no"
-.It "machdep.cpu.max_basic	uint32_t	no"
-.It "machdep.cpu.max_ext	uint32_t	no"
-.It "machdep.cpu.microcode_version	int32_t	no"
-.It "machdep.cpu.model	int32_t	no"
-.It "machdep.cpu.processor_flag	int32_t	no"
-.It "machdep.cpu.signature	int32_t	no"
-.It "machdep.cpu.stepping	int32_t	no"
-.It "machdep.cpu.thread_count	int32_t	no"
-.It "machdep.cpu.tlb.data.large	int32_t	no"
-.It "machdep.cpu.tlb.data.large_level1	int32_t	no"
-.It "machdep.cpu.tlb.data.small	int32_t	no"
-.It "machdep.cpu.tlb.data.small_level1	int32_t	no"
-.It "machdep.cpu.tlb.inst.large	int32_t	no"
-.It "machdep.cpu.tlb.inst.small	int32_t	no"
-.It "machdep.cpu.tlb.shared	int32_t	no"
-.It "machdep.cpu.ucupdate	int32_t	yes"
-.It "machdep.cpu.vendor	char[]	no"
-.It "machdep.cpu.xsave.extended_state	uint32_t	no"
-.It "machdep.tsc.deep_idle_rebase	uint32_t	yes"
-.It "machdep.tsc.frequency	int64_t	no"
-.It "machdep.tsc.nanotime.generation	uint32_t	no"
-.It "machdep.tsc.nanotime.shift	uint32_t	no"
-.El
-.Ss CTL_NET
-The string and integer information available for the CTL_NET level
-is detailed below.
-The changeable column shows whether a process with appropriate
-privilege may change the value.
-.Bl -column "Second level nameXXXXXX" "routing messagesXXX" -offset indent
-.It Sy "Second level name	Type	Changeable"
-.It "PF_ROUTE	routing messages	no"
-.It "PF_INET	IPv4 values	yes"
-.It "PF_INET6	IPv6 values	yes"
-.El
-.Bl -tag -width 6n
-.It Li PF_ROUTE
-Return the entire routing table or a subset of it.
-The data is returned as a sequence of routing messages (see
-.Xr route 4
-for the header file, format and meaning).
-The length of each message is contained in the message header.
-.Pp
-The third level name is a protocol number, which is currently always 0.
-The fourth level name is an address family, which may be set to 0 to
-select all address families.
-The fifth, sixth, and seventh level names are as follows:
-.Bl -column -offset indent "Fifth level      Sixth level" "Seventh level"
-.It Sy "Fifth level      Sixth level" Ta Sy "Seventh level"
-.It "NET_RT_FLAGS     rtflags" Ta "None"
-.It "NET_RT_DUMP      None" Ta "None or fib number"
-.It "NET_RT_IFLIST    0 or if_index" Ta None
-.It "NET_RT_IFMALIST  0 or if_index" Ta None
-.It "NET_RT_IFLISTL   0 or if_index" Ta None
-.El
-.Pp
-The
-.Dv NET_RT_IFMALIST
-name returns information about multicast group memberships on all interfaces
-if 0 is specified, or for the interface specified by
-.Va if_index .
-.It Li PF_INET
-Get or set various global information about the IPv4
-(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 ProtocolXX VariableXX TypeXX ChangeableXX
-.It Sy "Protocol	Variable	Type	Changeable"
-.It "icmp	bmcastecho	integer	yes"
-.It "icmp	maskrepl	integer	yes"
-.It "ip	forwarding	integer	yes"
-.It "ip	redirect	integer	yes"
-.It "ip	ttl	integer	yes"
-.It "udp	checksum	integer	yes"
-.El
-.Pp
-The variables are as follows:
-.Bl -tag -width 6n
-.It Li icmp.bmcastecho
-Returns 1 if an ICMP echo request to a broadcast or multicast address is
-to be answered.
-.It Li icmp.maskrepl
-Returns 1 if ICMP network mask requests are to be answered.
-.It Li ip.forwarding
-Returns 1 when IP forwarding is enabled for the host,
-meaning that the host is acting as a router.
-.It Li ip.redirect
-Returns 1 when ICMP redirects may be sent by the host.
-This option is ignored unless the host is routing IP packets,
-and should normally be enabled on all systems.
-.It Li ip.ttl
-The maximum time-to-live (hop count) value for an IP packet sourced by
-the system.
-This value applies to normal transport protocols, not to ICMP.
-.It Li udp.checksum
-Returns 1 when UDP checksums are being computed and checked.
-Disabling UDP checksums is strongly discouraged.
-.Pp
-For variables net.inet.*.ipsec, please refer to
-.Xr ipsec 4 .
-.El
-.It Li PF_INET6
-Get or set various global information about the IPv6
-(Internet Protocol version 6).
-The third level name is the protocol.
-The fourth level name is the variable name.
-.Pp
-For variables net.inet6.* please refer to
-.Xr inet6 4 .
-For variables net.inet6.*.ipsec6, please refer to
-.Xr ipsec 4 .
-.El
-.Ss CTL_USER
-The string and integer information available for the CTL_USER level
-is detailed below.
-The changeable column shows whether a process with appropriate
-privilege may change the value.
-.Bl -column "xxxxxxxxxxxxxxxxxxxxxxxxx" "xxxxxxxxxx" -offset indent
-.It Sy "Name	Type	Changeable"
-.It "user.bc_base_max	int32_t	no"
-.It "user.bc_dim_max	int32_t	no"
-.It "user.bc_scale_max	int32_t	no"
-.It "user.bc_string_max	int32_t	no"
-.It "user.coll_weights_max	int32_t	no"
-.It "user.cs_path	char[]	no"
-.It "user.expr_nest_max	int32_t	no"
-.It "user.line_max	int32_t	no"
-.It "user.posix2_c_bind	int32_t	no"
-.It "user.posix2_c_dev	int32_t	no"
-.It "user.posix2_char_term	int32_t	no"
-.It "user.posix2_fort_dev	int32_t	no"
-.It "user.posix2_fort_run	int32_t	no"
-.It "user.posix2_localedef	int32_t	no"
-.It "user.posix2_sw_dev	int32_t	no"
-.It "user.posix2_upe	int32_t	no"
-.It "user.posix2_version	int32_t	no"
-.It "user.re_dup_max	int32_t	no"
-.It "user.stream_max	int32_t	no"
-.It "user.tzname_max	int32_t	no"
-.El
-.Bl -tag -width 6n
-.Pp
-.It Li "user.bc_base_max"
-The maximum ibase/obase values in the
-.Xr bc 1
-utility.
-.It Li "user.bc_dim_max"
-The maximum array size in the
-.Xr bc 1
-utility.
-.It Li "user.bc_scale_max"
-The maximum scale value in the
-.Xr bc 1
-utility.
-.It Li "user.bc_string_max"
-The maximum string length in the
-.Xr bc 1
-utility.
-.It Li "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"
-Return a value for the
-.Ev PATH
-environment variable that finds all the standard utilities.
-.It Li "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"
-The maximum length in bytes of a text-processing utility's input
-line.
-.It Li "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"
-Return 1 if the system supports the C-Language Development Utilities Option,
-otherwise 0.
-.It Li "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_fort_dev"
-Return 1 if the system supports the FORTRAN Development Utilities Option,
-otherwise 0.
-.It Li "user.posix2_fort_run"
-Return 1 if the system supports the FORTRAN Runtime Utilities Option,
-otherwise 0.
-.It Li "user.posix2_localedef"
-Return 1 if the system supports the creation of locales, otherwise 0.
-.It Li "user.posix2_sw_dev"
-Return 1 if the system supports the Software Development Utilities Option,
-otherwise 0.
-.It Li "user.posix2_upe"
-Return 1 if the system supports the User Portability Utilities Option,
-otherwise 0.
-.It Li "user.posix2_version"
-The version of
-.St -p1003.2
-with which the system attempts to comply.
-.It Li "user.re_dup_max"
-The maximum number of repeated occurrences of a regular expression
-permitted when using interval notation.
-.It Li "user.stream_max"
-The minimum maximum number of streams that a process may have open
-at any one time.
-.It Li "user.tzname_max"
-The minimum maximum number of types supported for the name of a
-timezone.
-.El
-.Ss CTL_VM
-The string and integer information available for the CTL_VM level
-is detailed below.
-The changeable column shows whether a process with appropriate
-privilege may change the value.
-.Bl -column "xxxxxxxxxxxxxxxxxxxxxxxxx" "xxxxxxxxxx" -offset indent
-.It Sy "Name	Type	Changeable"
-.It "vm.loadavg	struct loadavg	no"
-.It "vm.swapusage	struct xsw_usage	no"
-.El
-.Pp
-.Bl -tag -width 6n
-.It Li "vm.loadavg"
-Return the load average history.
-The returned data consists of a
-.Va struct loadavg .
-.El
-.Sh RETURN VALUES
-.Rv -std
-.Sh FILES
-.Bl -tag -width <netinet/icmpXvar.h> -compact
-.It In sys/sysctl.h
-definitions for top level identifiers, second level kernel and hardware
-identifiers, and user level identifiers
-.It In sys/socket.h
-definitions for second level network identifiers
-.It In netinet/in.h
-definitions for third level IPv4/IPv6 identifiers and
-fourth level IPv4/v6 identifiers
-.It In netinet/icmp_var.h
-definitions for fourth level ICMP identifiers
-.It In netinet/icmp6.h
-definitions for fourth level ICMPv6 identifiers
-.It In netinet/udp_var.h
-definitions for fourth level UDP identifiers
-.El
-.Sh ERRORS
-The following errors may be reported:
-.Bl -tag -width Er
-.It Bq Er EFAULT
-The buffer
-.Fa name ,
-.Fa oldp ,
-.Fa newp ,
-or length pointer
-.Fa oldlenp
-contains an invalid address.
-.It Bq Er EINVAL
-The
-.Fa name
-array is less than two or greater than CTL_MAXNAME.
-.It Bq Er EINVAL
-A non-null
-.Fa newp
-is given and its specified length in
-.Fa newlen
-is too large or too small.
-.It Bq Er ENOMEM
-The length pointed to by
-.Fa oldlenp
-is too short to hold the requested value.
-.It Bq Er ENOMEM
-The smaller of either the length pointed to by
-.Fa oldlenp
-or the estimated size of the returned data exceeds the
-system limit on locked memory.
-.It Bq Er ENOMEM
-Locking the buffer
-.Fa oldp ,
-or a portion of the buffer if the estimated size of the data
-to be returned is smaller,
-would cause the process to exceed its per-process locked memory limit.
-.It Bq Er ENOTDIR
-The
-.Fa name
-array specifies an intermediate rather than terminal name.
-.It Bq Er EISDIR
-The
-.Fa name
-array specifies a terminal name, but the actual name is not terminal.
-.It Bq Er ENOENT
-The
-.Fa name
-array specifies a value that is unknown.
-.It Bq Er EPERM
-An attempt is made to set a read-only value.
-.It Bq Er EPERM
-A process without appropriate privilege attempts to set a value.
-.El
-.Sh SEE ALSO
-.Xr confstr 3 ,
-.Xr sysconf 3 ,
-.Xr sysctl 8
-.Sh HISTORY
-The
-.Fn sysctl
-function first appeared in
-.Bx 4.4 .