org.aoju.bus.health.common.unix.freebsd

Interface FreeBsdLibc

All Superinterfaces:

CLibrary, com.sun.jna.platform.unix.LibCAPI, com.sun.jna.Library, com.sun.jna.platform.unix.Reboot, com.sun.jna.platform.unix.Resource

public interface FreeBsdLibc
extends CLibrary

C library. This class should be considered non-API as it may be removed if/when its code is incorporated into the JNA project.

Since:

JDK 1.8+

Version:

5.3.5

Author:

Kimi Liu

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	FreeBsdLibc.CpTime

Nested classes/interfaces inherited from interface org.aoju.bus.health.common.unix.CLibrary

CLibrary.Addrinfo, CLibrary.Sockaddr, CLibrary.Timeval

Nested classes/interfaces inherited from interface com.sun.jna.platform.unix.Resource

com.sun.jna.platform.unix.Resource.Rlimit

Nested classes/interfaces inherited from interface com.sun.jna.Library

com.sun.jna.Library.Handler

Field Summary

Fields

Modifier and Type	Field and Description
static int	CP_IDLE Constant CP_IDLE=4
static int	CP_INTR Constant CP_INTR=3
static int	CP_NICE Constant CP_NICE=1
static int	CP_SYS Constant CP_SYS=2
static int	CP_USER Constant CP_USER=0
static int	CPUSTATES Constant CPUSTATES=5
static FreeBsdLibc	INSTANCE Constant INSTANCE
static int	INT_SIZE Constant INT_SIZE=Native.getNativeSize(int.class)
static int	UINT64_SIZE Constant UINT64_SIZE=Native.getNativeSize(long.class)

Fields inherited from interface org.aoju.bus.health.common.unix.CLibrary

AI_CANONNAME

Fields inherited from interface com.sun.jna.platform.unix.LibCAPI

HOST_NAME_MAX

Fields inherited from interface com.sun.jna.platform.unix.Reboot

RB_AUTOBOOT, RB_DISABLE_CAD, RB_ENABLE_CAD, RB_HALT_SYSTEM, RB_KEXEC, RB_POWER_OFF, RB_SW_SUSPEND

Fields inherited from interface com.sun.jna.platform.unix.Resource

RLIMIT_AS, RLIMIT_CORE, RLIMIT_CPU, RLIMIT_DATA, RLIMIT_FSIZE, RLIMIT_LOCKS, RLIMIT_MEMLOCK, RLIMIT_MSGQUEUE, RLIMIT_NICE, RLIMIT_NLIMITS, RLIMIT_NOFILE, RLIMIT_NPROC, RLIMIT_RSS, RLIMIT_RTPRIO, RLIMIT_RTTIME, RLIMIT_SIGPENDING, RLIMIT_STACK

Fields inherited from interface com.sun.jna.Library

OPTION_ALLOW_OBJECTS, OPTION_CALLING_CONVENTION, OPTION_CLASSLOADER, OPTION_FUNCTION_MAPPER, OPTION_INVOCATION_MAPPER, OPTION_OPEN_FLAGS, OPTION_STRING_ENCODING, OPTION_STRUCTURE_ALIGNMENT, OPTION_TYPE_MAPPER

Method Summary

Modifier and Type	Method and Description
int	sysctl(int[] name, int namelen, com.sun.jna.Pointer oldp, com.sun.jna.ptr.IntByReference oldlenp, com.sun.jna.Pointer newp, int newlen) The sysctl() function retrieves system information and allows processes with appropriate privileges to set system information.
int	sysctlbyname(String name, com.sun.jna.Pointer oldp, com.sun.jna.ptr.IntByReference oldlenp, com.sun.jna.Pointer newp, int newlen) The sysctlbyname() function accepts an ASCII representation of the name and internally looks up the integer name vector.
int	sysctlnametomib(String name, com.sun.jna.Pointer mibp, com.sun.jna.ptr.IntByReference size) The 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 mibp.

Methods inherited from interface org.aoju.bus.health.common.unix.CLibrary

freeaddrinfo, gai_strerror, getaddrinfo, getpid, readlink

Methods inherited from interface com.sun.jna.platform.unix.LibCAPI

getdomainname, getegid, getenv, geteuid, getgid, gethostname, getloadavg, getuid, setdomainname, setegid, setenv, seteuid, setgid, sethostname, setuid, unsetenv

Methods inherited from interface com.sun.jna.platform.unix.Reboot

reboot

Methods inherited from interface com.sun.jna.platform.unix.Resource

getrlimit, setrlimit

Field Detail

INSTANCE

static final FreeBsdLibc INSTANCE

Constant INSTANCE

UINT64_SIZE

static final int UINT64_SIZE

Constant UINT64_SIZE=Native.getNativeSize(long.class)

INT_SIZE

static final int INT_SIZE

Constant INT_SIZE=Native.getNativeSize(int.class)

CPUSTATES

static final int CPUSTATES

Constant CPUSTATES=5

See Also:

Constant Field Values

CP_USER

static final int CP_USER

Constant CP_USER=0

See Also:

Constant Field Values

CP_NICE

static final int CP_NICE

Constant CP_NICE=1

See Also:

Constant Field Values

CP_SYS

static final int CP_SYS

Constant CP_SYS=2

See Also:

Constant Field Values

CP_INTR

static final int CP_INTR

Constant CP_INTR=3

See Also:

Constant Field Values

CP_IDLE

static final int CP_IDLE

Constant CP_IDLE=4

See Also:

Constant Field Values

Method Detail

sysctl

int sysctl(int[] name,
           int namelen,
           com.sun.jna.Pointer oldp,
           com.sun.jna.ptr.IntByReference oldlenp,
           com.sun.jna.Pointer newp,
           int newlen)

The sysctl() function retrieves system information and allows processes with appropriate privileges to set system information. The information available from sysctl() consists of integers, strings, and tables.

The state is described using a "Management Information Base" (MIB) style name, listed in name, which is a namelen length array of integers.

The information is copied into the buffer specified by oldp. The size of the buffer is given by the location specified by 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 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 ENOMEM. If the old value is not desired, oldp and oldlenp should be set to NULL.

The size of the available data can be determined by calling sysctl() with the NULL argument for oldp. The size of the available data will be returned in the location pointed to by 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.

To set a new value, newp is set to point to a buffer of length newlen from which the requested value is to be taken. If a new value is not to be set, newp should be set to NULL and newlen set to 0.

Parameters:

name - MIB array of integers

namelen - length of the MIB array

oldp - Information retrieved

oldlenp - Size of information retrieved

newp - Information to be written

newlen - Size of information to be written

Returns:

0 on success; sets errno on failure

sysctlbyname

int sysctlbyname(String name,
                 com.sun.jna.Pointer oldp,
                 com.sun.jna.ptr.IntByReference oldlenp,
                 com.sun.jna.Pointer newp,
                 int newlen)

The 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 sysctl() function.

Parameters:

name - ASCII representation of the MIB name

oldp - Information retrieved

oldlenp - Size of information retrieved

newp - Information to be written

newlen - Size of information to be written

Returns:

0 on success; sets errno on failure

sysctlnametomib

int sysctlnametomib(String name,
                    com.sun.jna.Pointer mibp,
                    com.sun.jna.ptr.IntByReference size)

The 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 mibp. The number of elements in the mib array is given by the location specified by sizep before the call, and that location gives the number of entries copied after a successful call. The resulting mib and size may be used in subsequent 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 sysctl() function runs in about a third the time as the same request made via the sysctlbyname() function).

The number of elements in the mib array can be determined by calling sysctlnametomib() with the NULL argument for mibp.

The sysctlnametomib() function is also useful for fetching mib prefixes. If size on input is greater than the number of elements written, the array still contains the additional elements which may be written programmatically.

Parameters:

name - ASCII representation of the name

mibp - Integer array containing the corresponding name vector.

size - On input, number of elements in the returned array; on output, the number of entries copied.

Returns:

0 on success; sets errno on failure