.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\" must display the following acknowledgement:
-.\" This product includes software developed by the University of
-.\" California, Berkeley and its contributors.
.\" 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.
.\" SUCH DAMAGE.
.\"
.\" @(#)sysctl.3 8.4 (Berkeley) 5/9/95
-.\" $FreeBSD: src/lib/libc/gen/sysctl.3,v 1.63 2004/07/02 23:52:10 ru Exp $
+.\" $FreeBSD$
.\"
-.Dd October 21, 2008
+.Dd May 17, 2013
.Dt SYSCTL 3
.Os
.Sh NAME
as the standard
.Fn sysctl
function.
-For a list of ASCII representations of commonly used sysctl names, please see
-.Xr sysctl 1 .
.Pp
The information is copied into the buffer specified by
.Fa oldp .
function runs in about a third the time as the same request made via the
.Fn sysctlbyname
function).
-The
-.Fn sysctlnametomib
-function is also useful for fetching mib prefixes and then adding
-a final component.
-For example, to fetch process information
-for processes with pid's less than 100:
-.Pp
-.Bd -literal -offset indent -compact
-int i, mib[4];
-size_t len;
-struct kinfo_proc kp;
-
-/* Fill out the first three components of the mib */
-len = 4;
-sysctlnametomib("kern.proc.pid", mib, &len);
-
-/* Fetch and print entries for pid's < 100 */
-for (i = 0; i < 100; i++) {
- mib[3] = i;
- len = sizeof(kp);
- if (sysctl(mib, 4, &kp, &len, NULL, 0) == -1)
- perror("sysctl");
- else if (len > 0)
- printkproc(&kp);
-}
-.Ed
-.Pp
-Note: Implementation of
-.Fn printkproc
--- to print whatever data deemed necessary from the large
-.Vt kinfo_proc
-structure (
-.In sys/sysctl.h
-) -- is left as an exercise for the reader.
.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.
-.Pp
-.Bl -column CTLXMACHDEP "Next level names" -offset indent
+.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_NET sys/socket.h Networking"
.It "CTL_USER sys/sysctl.h User-level"
.It "CTL_VM sys/resources.h Virtual memory (struct loadavg)"
-.It "CTL_VM sys/vmmeter.h Virtual memory (struct vmtotal)"
.El
.Pp
For example, the following retrieves the maximum number of processes allowed
in the system:
.Pp
.Bd -literal -offset indent -compact
-int mib[2], maxproc;
-size_t len;
-
-mib[0] = CTL_KERN;
-mib[1] = KERN_MAXPROC;
-len = sizeof(maxproc);
-sysctl(mib, 2, &maxproc, &len, NULL, 0);
+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
-int mib[2];
-size_t len;
char *p;
-
-mib[0] = CTL_USER;
-mib[1] = USER_CS_PATH;
-sysctl(mib, 2, NULL, &len, NULL, 0);
+size_t len;
+sysctlbyname("user.cs_path", NULL, &len, NULL, 0);
p = malloc(len);
-sysctl(mib, 2, p, &len, NULL, 0);
-.Ed
-.Ss CTL_DEBUG
-The debugging variables vary from system to system.
-A debugging variable may be added or deleted without need to recompile
-.Fn sysctl
-to know about it.
-Each time it runs,
-.Fn sysctl
-gets the list of debugging variables from the kernel and
-displays their current values.
-The system defines twenty
-.Pq Vt "struct ctldebug"
-variables named
-.Va debug0
-through
-.Va debug19 .
-They are declared as separate variables so that they can be
-individually initialized at the location of their associated variable.
-The loader prevents multiple use of the same variable by issuing errors
-if a variable is initialized in more than one place.
-For example, to export the variable
-.Va dospecialcheck
-as a debugging variable, the following declaration would be used:
-.Pp
-.Bd -literal -offset indent -compact
-int dospecialcheck = 1;
-struct ctldebug debug5 = { "dospecialcheck", &dospecialcheck };
+sysctlbyname("user.cs_path", p, &len, NULL, 0);
.Ed
.Ss CTL_VFS
A distinguished second level name, VFS_GENERIC,
is detailed below.
The changeable column shows whether a process with appropriate
privilege may change the value.
-.Bl -column "Second level nameXXXXXX" integerXXX -offset indent
-.It Sy "Second level name Type Changeable"
-.It "HW_MACHINE string no"
-.It "HW_MODEL string no"
-.It "HW_NCPU integer no (DEPRECATED)"
-.It "HW_BYTEORDER integer no"
-.It "HW_PHYSMEM integer no"
-.It "HW_MEMSIZE integer no"
-.It "HW_USERMEM integer no"
-.It "HW_PAGESIZE integer no"
-.It "HW_FLOATINGPOINT integer no"
-.It "HW_MACHINE_ARCH string no"
-.\".It "HW_DISKNAMES integer no"
-.\".It "HW_DISKSTATS integer no"
+.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 int32_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
-.Pp
.Bl -tag -width 6n
-.It Li HW_MACHINE
-The machine class.
-.It Li HW_MODEL
-The machine model
-.It Li HW_NCPU (DEPRECATED)
-The number of cpus. It is recommended that you use "hw.physicalcpu" "hw.physicalcpu_max" "hw.logicalcpu" or "hw.logicalcpu_max" instead.
-.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.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_BYTEORDER
-The byteorder (4,321, or 1,234).
-.It Li HW_PHYSMEM
-The bytes of physical memory represented by a 32-bit integer (for backward compatibility). Use HW_MEMSIZE instead.
-.It Li HW_MEMSIZE
-The bytes of physical memory represented by a 64-bit integer.
-.It Li HW_USERMEM
-The bytes of non-kernel memory.
-.It Li HW_PAGESIZE
-The software page size.
-.It Li HW_FLOATINGPOINT
-Nonzero if the floating point support is in hardware.
-.It Li HW_MACHINE_ARCH
-The machine dependent architecture type.
-.\".It Fa HW_DISKNAMES
-.\".It Fa HW_DISKSTATS
+.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
system vnodes, the open file entries, routing table entries,
virtual memory statistics, load average history, and clock rate
information.
-.Bl -column "KERNXMAXFILESPERPROCXXX" "struct clockrateXXX" -offset indent
-.It Sy "Second level name Type Changeable"
-.It "KERN_ARGMAX integer no"
-.It "KERN_BOOTFILE string yes"
-.It "KERN_BOOTTIME struct timeval no"
-.It "KERN_CLOCKRATE struct clockinfo no"
-.It "KERN_FILE struct file no"
-.It "KERN_HOSTID integer yes"
-.It "KERN_HOSTNAME string yes"
-.It "KERN_JOB_CONTROL integer no"
-.It "KERN_MAXFILES integer yes"
-.It "KERN_MAXFILESPERPROC integer yes"
-.It "KERN_MAXPROC integer no"
-.It "KERN_MAXPROCPERUID integer yes"
-.It "KERN_MAXVNODES integer yes"
-.It "KERN_NGROUPS integer no"
-.It "KERN_NISDOMAINNAME string yes"
-.It "KERN_OSRELDATE integer no"
-.It "KERN_OSRELEASE string no"
-.It "KERN_OSREV integer no"
-.It "KERN_OSTYPE string no"
-.It "KERN_POSIX1 integer no"
-.It "KERN_PROC struct kinfo_proc no"
-.It "KERN_PROF node not applicable"
-.It "KERN_QUANTUM integer yes"
-.It "KERN_SAVED_IDS integer no"
-.It "KERN_SECURELVL integer raise only"
-.It "KERN_UPDATEINTERVAL integer no"
-.It "KERN_VERSION string no"
-.It "KERN_VNODE struct vnode no"
+.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
-.Pp
.Bl -tag -width 6n
-.It Li KERN_ARGMAX
+.It Li "kern.argmax"
The maximum bytes of argument to
.Xr execve 2 .
-.It Li KERN_BOOTFILE
-The full pathname of the file from which the kernel was loaded.
-.It Li KERN_BOOTTIME
+.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
+.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_FILE
-Return the entire file table.
-The returned data consists of a single
-.Va struct filehead
-followed by an array of
-.Va struct file ,
-whose size depends on the current number of such objects in the system.
-.It Li KERN_HOSTID
+.It Li "kern.hostid"
Get or set the host id.
-.It Li KERN_HOSTNAME
+.It Li "kern.hostname"
Get or set the hostname.
-.It Li KERN_JOB_CONTROL
+.It Li "kern.job_control"
Return 1 if job control is available on this system, otherwise 0.
-.It Li KERN_MAXFILES
+.It Li "kern.maxfiles"
The maximum number of files that may be open in the system.
-.It Li KERN_MAXFILESPERPROC
+.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
+.It Li "kern.maxproc"
The maximum number of concurrent processes the system will allow.
-.It Li KERN_MAXPROCPERUID
+.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
+.It Li "kern.maxvnodes"
The maximum number of vnodes available on the system.
-.It Li KERN_NGROUPS
+.It Li "kern.ngroups"
The maximum number of supplemental groups.
-.It Li KERN_NISDOMAINNAME
+.It Li "kern.nisdomainname"
The name of the current YP/NIS domain.
-.It Li KERN_OSRELDATE
-The kernel release version in the format
-.Ar M Ns Ar mm Ns Ar R Ns Ar xx ,
-where
-.Ar M
-is the major version,
-.Ar mm
-is the two digit minor version,
-.Ar R
-is 0 if release branch, otherwise 1,
-and
-.Ar xx
-is updated when the available APIs change.
-.Pp
-The userland release version is available from
-.In osreldate.h ;
-parse this file if you need to get the release version of
-the currently installed userland.
-.It Li KERN_OSRELEASE
+.It Li "kern.osrelease"
The system release string.
-.It Li KERN_OSREV
-The system revision string.
-.It Li KERN_OSTYPE
+.It Li "kern.osrevision"
+The system revision number.
+.It Li "kern.ostype"
The system type string.
-.It Li KERN_POSIX1
+.It Li "kern.posix1version"
The version of
.St -p1003.1
with which the system
attempts to comply.
-.It Li KERN_PROC
-Return the entire process table, or a subset of it.
-An array of
-.Va struct kinfo_proc
-structures is returned,
-whose size depends on the current number of such objects in the system.
-The third and fourth level names are as follows:
-.Bl -column "Third level nameXXXXXX" "Fourth level is:XXXXXX" -offset indent
-.It "Third level name Fourth level is:"
-.It "KERN_PROC_ALL None"
-.It "KERN_PROC_PID A process ID"
-.It "KERN_PROC_PGRP A process group"
-.It "KERN_PROC_TTY A tty device"
-.It "KERN_PROC_UID A user ID"
-.It "KERN_PROC_RUID A real user ID"
-.El
-.It Li KERN_PROF
-Return profiling information about the kernel.
-If the kernel is not compiled for profiling,
-attempts to retrieve any of the KERN_PROF values will
-fail with
-.Er ENOENT .
-The third level names for the string and integer profiling information
-is detailed below.
-The changeable column shows whether a process with appropriate
-privilege may change the value.
-.Bl -column "GPROFXGMONPARAMXXX" "struct gmonparamXXX" -offset indent
-.It Sy "Third level name Type Changeable"
-.It "GPROF_STATE integer yes"
-.It "GPROF_COUNT u_short[\|] yes"
-.It "GPROF_FROMS u_short[\|] yes"
-.It "GPROF_TOS struct tostruct yes"
-.It "GPROF_GMONPARAM struct gmonparam no"
-.El
-.Pp
-The variables are as follows:
-.Bl -tag -width 6n
-.It Li GPROF_STATE
-Returns GMON_PROF_ON or GMON_PROF_OFF to show that profiling
-is running or stopped.
-.It Li GPROF_COUNT
-Array of statistical program counter counts.
-.It Li GPROF_FROMS
-Array indexed by program counter of call-from points.
-.It Li GPROF_TOS
-Array of
-.Va struct tostruct
-describing destination of calls and their counts.
-.It Li GPROF_GMONPARAM
-Structure giving the sizes of the above arrays.
-.El
-.It Li KERN_QUANTUM
-The maximum period of time, in microseconds, for which a process is allowed
-to run without being preempted if other processes are in the run queue.
-.It Li KERN_SAVED_IDS
+.It Li "kern.saved_ids"
Returns 1 if saved set-group and saved set-user ID is available.
-.It Li KERN_SECURELVL
+.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
+.It Li "kern.version"
The system version string.
-.It Li KERN_VNODE
-Return the entire vnode table.
-Note, the vnode table is not necessarily a consistent snapshot of
-the system.
-The returned data consists of an array whose size depends on the
-current number of such objects in the system.
-Each element of the array contains the kernel address of a vnode
-.Va struct vnode *
-followed by the vnode itself
-.Va struct vnode .
.El
.Ss CTL_MACHDEP
The set of variables defined is architecture dependent.
The following variables are defined for the i386 architecture.
-.Bl -column "CONSOLE_DEVICEXXX" "struct bootinfoXXX" -offset indent
-.It Sy "Second level name Type Changeable"
-.It Li "CPU_CONSDEV dev_t no"
-.It Li "CPU_ADJKERNTZ int yes"
-.It Li "CPU_DISRTCSET int yes"
-.It Li "CPU_BOOTINFO struct bootinfo no"
-.It Li "CPU_WALLCLOCK int yes"
+.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
.It "PF_INET IPv4 values yes"
.It "PF_INET6 IPv6 values yes"
.El
-.Pp
.Bl -tag -width 6n
.It Li PF_ROUTE
Return the entire routing table or a subset of it.
The third level name is a protocol number, which is currently always 0.
The fourth level name is an address family, which may be set to 0 to
select all address families.
-The fifth and sixth level names are as follows:
-.Bl -column "Fifth level nameXXXXXX" "Sixth level is:XXX" -offset indent
-.It Sy "Fifth level name Sixth level is:"
-.It "NET_RT_FLAGS rtflags"
-.It "NET_RT_DUMP None"
-.It "NET_RT_IFLIST 0 or if_index"
-.It "NET_RT_IFMALIST 0 or if_index"
+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
is detailed below.
The changeable column shows whether a process with appropriate
privilege may change the value.
-.Bl -column "USER_COLL_WEIGHTS_MAXXXX" "integerXXX" -offset indent
-.It Sy "Second level name Type Changeable"
-.It "USER_BC_BASE_MAX integer no"
-.It "USER_BC_DIM_MAX integer no"
-.It "USER_BC_SCALE_MAX integer no"
-.It "USER_BC_STRING_MAX integer no"
-.It "USER_COLL_WEIGHTS_MAX integer no"
-.It "USER_CS_PATH string no"
-.It "USER_EXPR_NEST_MAX integer no"
-.It "USER_LINE_MAX integer no"
-.It "USER_POSIX2_CHAR_TERM integer no"
-.It "USER_POSIX2_C_BIND integer no"
-.It "USER_POSIX2_C_DEV integer no"
-.It "USER_POSIX2_FORT_DEV integer no"
-.It "USER_POSIX2_FORT_RUN integer no"
-.It "USER_POSIX2_LOCALEDEF integer no"
-.It "USER_POSIX2_SW_DEV integer no"
-.It "USER_POSIX2_UPE integer no"
-.It "USER_POSIX2_VERSION integer no"
-.It "USER_RE_DUP_MAX integer no"
-.It "USER_STREAM_MAX integer no"
-.It "USER_TZNAME_MAX integer no"
+.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
+.It Li "user.bc_base_max"
The maximum ibase/obase values in the
.Xr bc 1
utility.
-.It Li USER_BC_DIM_MAX
+.It Li "user.bc_dim_max"
The maximum array size in the
.Xr bc 1
utility.
-.It Li USER_BC_SCALE_MAX
+.It Li "user.bc_scale_max"
The maximum scale value in the
.Xr bc 1
utility.
-.It Li USER_BC_STRING_MAX
+.It Li "user.bc_string_max"
The maximum string length in the
.Xr bc 1
utility.
-.It Li USER_COLL_WEIGHTS_MAX
+.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
+.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
+.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
+.It Li "user.line_max"
The maximum length in bytes of a text-processing utility's input
line.
-.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_C_BIND
+.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
+.It Li "user.posix2_c_dev"
Return 1 if the system supports the C-Language Development Utilities Option,
otherwise 0.
-.It Li USER_POSIX2_FORT_DEV
+.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
+.It Li "user.posix2_fort_run"
Return 1 if the system supports the FORTRAN Runtime Utilities Option,
otherwise 0.
-.It Li USER_POSIX2_LOCALEDEF
+.It Li "user.posix2_localedef"
Return 1 if the system supports the creation of locales, otherwise 0.
-.It Li USER_POSIX2_SW_DEV
+.It Li "user.posix2_sw_dev"
Return 1 if the system supports the Software Development Utilities Option,
otherwise 0.
-.It Li USER_POSIX2_UPE
+.It Li "user.posix2_upe"
Return 1 if the system supports the User Portability Utilities Option,
otherwise 0.
-.It Li USER_POSIX2_VERSION
+.It Li "user.posix2_version"
The version of
.St -p1003.2
with which the system attempts to comply.
-.It Li USER_RE_DUP_MAX
+.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
+.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
+.It Li "user.tzname_max"
The minimum maximum number of types supported for the name of a
timezone.
.El
is detailed below.
The changeable column shows whether a process with appropriate
privilege may change the value.
-.Bl -column "Second level nameXXXXXX" "struct loadavgXXX" -offset indent
-.It Sy "Second level name Type Changeable"
-.It "VM_LOADAVG struct loadavg no"
-.It "VM_PAGEOUT_ALGORITHM integer yes"
-.It "VM_SWAPPING_ENABLED integer maybe"
-.It "VM_V_CACHE_MAX integer yes"
-.It "VM_V_CACHE_MIN integer yes"
-.It "VM_V_FREE_MIN integer yes"
-.It "VM_V_FREE_RESERVED integer yes"
-.It "VM_V_FREE_TARGET integer yes"
-.It "VM_V_INACTIVE_TARGET integer yes"
-.It "VM_V_PAGEOUT_FREE_MIN integer yes"
+.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
+.It Li "vm.loadavg"
Return the load average history.
The returned data consists of a
.Va struct loadavg .
-.It Li VM_PAGEOUT_ALGORITHM
-0 if the statistics-based page management algorithm is in use
-or 1 if the near-LRU algorithm is in use.
-.It Li VM_SWAPPING_ENABLED
-1 if process swapping is enabled or 0 if disabled.
-This variable is
-permanently set to 0 if the kernel was built with swapping disabled.
-.It Li VM_V_CACHE_MAX
-Maximum desired size of the cache queue.
-.It Li VM_V_CACHE_MIN
-Minimum desired size of the cache queue.
-If the cache queue size
-falls very far below this value, the pageout daemon is awakened.
-.It Li VM_V_FREE_MIN
-Minimum amount of memory (cache memory plus free memory)
-required to be available before a process waiting on memory will be
-awakened.
-.It Li VM_V_FREE_RESERVED
-Processes will awaken the pageout daemon and wait for memory if the
-number of free and cached pages drops below this value.
-.It Li VM_V_FREE_TARGET
-The total amount of free memory (including cache memory) that the
-pageout daemon tries to maintain.
-.It Li VM_V_INACTIVE_TARGET
-The desired number of inactive pages that the pageout daemon should
-achieve when it runs.
-Inactive pages can be quickly inserted into
-process address space when needed.
-.It Li VM_V_PAGEOUT_FREE_MIN
-If the amount of free and cache memory falls below this value, the
-pageout daemon will enter "memory conserving mode" to avoid deadlock.
.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 EPERM
A process without appropriate privilege attempts to set a value.
.El
-.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 sys/gmon.h
-definitions for third level profiling identifiers
-.It In mach/vm_param.h
-definitions for second level virtual memory 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 SEE ALSO
-.Xr sysctl 1 ,
+.Xr confstr 3 ,
.Xr sysconf 3 ,
.Xr sysctl 8
.Sh HISTORY
projects / apple / libc.git / blobdiff