Os

Kotlin |Java

class Os

kotlin.Any
↳	android.system.Os

Access to low-level system functionality. Most of these are system calls. Most users will want to use higher-level APIs where available, but this class provides access to the underlying primitives used to implement the higher-level APIs.

The corresponding constants can be found in OsConstants.

Summary

Public methods
static FileDescriptor!	`accept(fd: FileDescriptor!, peerAddress: InetSocketAddress!)` See accept(2).
static Boolean	`access(path: String!, mode: Int)` See access(2).
static Unit	`bind(fd: FileDescriptor!, address: InetAddress!, port: Int)` See bind(2).
static Unit	`bind(fd: FileDescriptor, address: SocketAddress)` See bind(2).
static Unit	`chmod(path: String!, mode: Int)` See chmod(2).
static Unit	`chown(path: String!, uid: Int, gid: Int)` See chown(2).
static Unit	`close(fd: FileDescriptor!)` See close(2).
static Unit	`connect(fd: FileDescriptor!, address: InetAddress!, port: Int)` See connect(2).
static Unit	`connect(fd: FileDescriptor, address: SocketAddress)` See connect(2).
static StructDlInfo!	`dladdr(addr: Long)` See dladdr(3)
static FileDescriptor!	`dup(oldFd: FileDescriptor!)` See dup(2).
static FileDescriptor!	`dup2(oldFd: FileDescriptor!, newFd: Int)` See dup2(2).
static Array<String!>!	`environ()` See environ(3).
static Unit	`execv(filename: String!, argv: Array<String!>!)` See exec(3).
static Unit	`execve(filename: String!, argv: Array<String!>!, envp: Array<String!>!)` See execve(2).
static Unit	`fchmod(fd: FileDescriptor!, mode: Int)` See fchmod(2).
static Unit	`fchown(fd: FileDescriptor!, uid: Int, gid: Int)` See fchown(2).
static Int	`fcntlInt(fd: FileDescriptor, cmd: Int, arg: Int)` See fcntl(2).
static Unit	`fdatasync(fd: FileDescriptor!)` See fdatasync(2).
static StructStat!	`fstat(fd: FileDescriptor!)` See fstat(2).
static StructStatVfs!	`fstatvfs(fd: FileDescriptor!)` See fstatvfs(2).
static Unit	`fsync(fd: FileDescriptor!)` See fsync(2).
static Unit	`ftruncate(fd: FileDescriptor!, length: Long)` See ftruncate(2).
static String!	`gai_strerror(error: Int)` See gai_strerror(3).
static Int	`getegid()` See getegid(2).
static String!	`getenv(name: String!)` See getenv(3).
static Int	`geteuid()` See geteuid(2).
static Int	`getgid()` See getgid(2).
static SocketAddress!	`getpeername(fd: FileDescriptor!)` See getpeername(2).
static Int	`getpid()` See getpid(2).
static Int	`getppid()` See getppid(2).
static SocketAddress!	`getsockname(fd: FileDescriptor!)` See getsockname(2).
static StructTimeval	`getsockoptTimeval(fd: FileDescriptor, level: Int, option: Int)` See getsockopt(2).
static Int	`gettid()` See gettid(2).
static Int	`getuid()` See getuid(2).
static ByteArray!	`getxattr(path: String!, name: String!)` See getxattr(2)
static String!	`if_indextoname(index: Int)` See if_indextoname(3).
static Int	`if_nametoindex(name: String!)` See if_nametoindex(3).
static InetAddress!	`inet_pton(family: Int, address: String!)` See inet_pton(3).
static Boolean	`isatty(fd: FileDescriptor!)` See isatty(3).
static Unit	`kill(pid: Int, signal: Int)` See kill(2).
static Unit	`lchown(path: String!, uid: Int, gid: Int)` See lchown(2).
static Unit	`link(oldPath: String!, newPath: String!)` See link(2).
static Unit	`listen(fd: FileDescriptor!, backlog: Int)` See listen(2).
static Array<String!>!	`listxattr(path: String!)` See listxattr(2)
static Long	`lseek(fd: FileDescriptor!, offset: Long, whence: Int)` See lseek(2).
static StructStat!	`lstat(path: String!)` See lstat(2).
static FileDescriptor	`memfd_create(name: String, flags: Int)` See memfd_create(2).
static Unit	`mincore(address: Long, byteCount: Long, vector: ByteArray!)` See mincore(2).
static Unit	`mkdir(path: String!, mode: Int)` See mkdir(2).
static Unit	`mkfifo(path: String!, mode: Int)` See mkfifo(3).
static Unit	`mlock(address: Long, byteCount: Long)` See mlock(2).
static Long	`mmap(address: Long, byteCount: Long, prot: Int, flags: Int, fd: FileDescriptor!, offset: Long)` See mmap(2).
static Unit	`msync(address: Long, byteCount: Long, flags: Int)` See msync(2).
static Unit	`munlock(address: Long, byteCount: Long)` See munlock(2).
static Unit	`munmap(address: Long, byteCount: Long)` See munmap(2).
static FileDescriptor!	`open(path: String!, flags: Int, mode: Int)` See open(2).
static Array<FileDescriptor!>!	`pipe()` See pipe(2).
static Int	`poll(fds: Array<StructPollfd!>!, timeoutMs: Int)` See poll(2).
static Unit	`posix_fallocate(fd: FileDescriptor!, offset: Long, length: Long)` See posix_fallocate(3).
static Int	`prctl(option: Int, arg2: Long, arg3: Long, arg4: Long, arg5: Long)` See prctl(2).
static Int	`pread(fd: FileDescriptor!, bytes: ByteArray!, byteOffset: Int, byteCount: Int, offset: Long)` See pread(2).
static Int	`pread(fd: FileDescriptor!, buffer: ByteBuffer!, offset: Long)` See pread(2).
static Int	`pwrite(fd: FileDescriptor!, bytes: ByteArray!, byteOffset: Int, byteCount: Int, offset: Long)` See pwrite(2).
static Int	`pwrite(fd: FileDescriptor!, buffer: ByteBuffer!, offset: Long)` See pwrite(2).
static Int	`read(fd: FileDescriptor!, bytes: ByteArray!, byteOffset: Int, byteCount: Int)` See read(2).
static Int	`read(fd: FileDescriptor!, buffer: ByteBuffer!)` See read(2).
static String!	`readlink(path: String!)` See readlink(2).
static Int	`readv(fd: FileDescriptor!, buffers: Array<Any!>!, offsets: IntArray!, byteCounts: IntArray!)` See readv(2).
static Int	`recvfrom(fd: FileDescriptor!, bytes: ByteArray!, byteOffset: Int, byteCount: Int, flags: Int, srcAddress: InetSocketAddress!)` See recvfrom(2).
static Int	`recvfrom(fd: FileDescriptor!, buffer: ByteBuffer!, flags: Int, srcAddress: InetSocketAddress!)` See recvfrom(2).
static Int	`recvmsg(fd: FileDescriptor, msg: StructMsghdr, flags: Int)` See recvmsg(2).
static Unit	`remove(path: String!)` See remove(3).
static Unit	`removexattr(path: String!, name: String!)` See removexattr(2).
static Unit	`rename(oldPath: String!, newPath: String!)` See rename(2).
static Long	`sendfile(outFd: FileDescriptor!, inFd: FileDescriptor!, offset: Int64Ref!, byteCount: Long)` See sendfile(2).
static Int	`sendmsg(fd: FileDescriptor, msg: StructMsghdr, flags: Int)` See sendmsg(2).
static Int	`sendto(fd: FileDescriptor!, bytes: ByteArray!, byteOffset: Int, byteCount: Int, flags: Int, inetAddress: InetAddress!, port: Int)` See sendto(2).
static Int	`sendto(fd: FileDescriptor, bytes: ByteArray, byteOffset: Int, byteCount: Int, flags: Int, address: SocketAddress?)` See sendto(2).
static Int	`sendto(fd: FileDescriptor!, buffer: ByteBuffer!, flags: Int, inetAddress: InetAddress!, port: Int)` See sendto(2).
static Unit	`setegid(egid: Int)` See setegid(2).
static Unit	`setenv(name: String!, value: String!, overwrite: Boolean)` See setenv(3).
static Unit	`seteuid(euid: Int)` See seteuid(2).
static Unit	`setgid(gid: Int)` See setgid(2).
static Int	`setsid()` See setsid(2).
static Unit	`setsockoptInt(fd: FileDescriptor!, level: Int, option: Int, value: Int)` See setsockopt(2).
static Unit	`setsockoptTimeval(fd: FileDescriptor, level: Int, option: Int, value: StructTimeval)` See setsockopt(2).
static Unit	`setuid(uid: Int)` See setuid(2).
static Unit	`setxattr(path: String!, name: String!, value: ByteArray!, flags: Int)` See setxattr(2)
static Unit	`shutdown(fd: FileDescriptor!, how: Int)` See shutdown(2).
static FileDescriptor!	`socket(domain: Int, type: Int, protocol: Int)` See socket(2).
static Unit	`socketpair(domain: Int, type: Int, protocol: Int, fd1: FileDescriptor!, fd2: FileDescriptor!)` See socketpair(2).
static StructStat!	`stat(path: String!)` See stat(2).
static StructStatVfs!	`statvfs(path: String!)` See statvfs(2).
static String!	`strerror(errno: Int)` See strerror(2).
static String!	`strsignal(signal: Int)` See strsignal(3).
static Unit	`symlink(oldPath: String!, newPath: String!)` See symlink(2).
static Long	`sysconf(name: Int)` See sysconf(3).
static Unit	`tcdrain(fd: FileDescriptor!)` See tcdrain(3).
static Unit	`tcsendbreak(fd: FileDescriptor!, duration: Int)` See tcsendbreak(3).
static Int	`umask(mask: Int)` See umask(2).
static StructUtsname!	`uname()` See uname(2).
static Unit	`unsetenv(name: String!)` See unsetenv(3).
static Int	`write(fd: FileDescriptor!, bytes: ByteArray!, byteOffset: Int, byteCount: Int)` See write(2).
static Int	`write(fd: FileDescriptor!, buffer: ByteBuffer!)` See write(2).
static Int	`writev(fd: FileDescriptor!, buffers: Array<Any!>!, offsets: IntArray!, byteCounts: IntArray!)` See writev(2).

Public methods

accept

Added in API level 21

static fun accept(
    fd: FileDescriptor!, 
    peerAddress: InetSocketAddress!
): FileDescriptor!

See accept(2).

access

Added in API level 21

static fun access(
    path: String!, 
    mode: Int
): Boolean

See access(2).

bind

Added in API level 21

static fun bind(
    fd: FileDescriptor!, 
    address: InetAddress!, 
    port: Int
): Unit

See bind(2).

bind

Added in API level 29

static fun bind(
    fd: FileDescriptor, 
    address: SocketAddress
): Unit

See bind(2).

Parameters
`fd`	FileDescriptor: This value cannot be `null`.
`address`	SocketAddress: This value cannot be `null`.

chmod

Added in API level 21

static fun chmod(
    path: String!, 
    mode: Int
): Unit

See chmod(2).

chown

Added in API level 21

static fun chown(
    path: String!, 
    uid: Int, 
    gid: Int
): Unit

See chown(2).

close

Added in API level 21

static fun close(fd: FileDescriptor!): Unit

See close(2).

connect

Added in API level 21

static fun connect(
    fd: FileDescriptor!, 
    address: InetAddress!, 
    port: Int
): Unit

See connect(2).

connect

Added in API level 29

static fun connect(
    fd: FileDescriptor, 
    address: SocketAddress
): Unit

See connect(2).

Parameters
`fd`	FileDescriptor: This value cannot be `null`.
`address`	SocketAddress: This value cannot be `null`.

dladdr

Added in API level 36.1

static fun dladdr(addr: Long): StructDlInfo!

See dladdr(3)

Return
`StructDlInfo!`	null if the underlying native `dladdr` call fails.

dup

Added in API level 21

static fun dup(oldFd: FileDescriptor!): FileDescriptor!

See dup(2).

dup2

Added in API level 21

static fun dup2(
    oldFd: FileDescriptor!, 
    newFd: Int
): FileDescriptor!

See dup2(2).

environ

Added in API level 21

static fun environ(): Array<String!>!

See environ(3).

execv

Added in API level 21

static fun execv(
    filename: String!, 
    argv: Array<String!>!
): Unit

See exec(3).

execve

Added in API level 21

static fun execve(
    filename: String!, 
    argv: Array<String!>!, 
    envp: Array<String!>!
): Unit

See execve(2).

fchmod

Added in API level 21

static fun fchmod(
    fd: FileDescriptor!, 
    mode: Int
): Unit

See fchmod(2).

fchown

Added in API level 21

static fun fchown(
    fd: FileDescriptor!, 
    uid: Int, 
    gid: Int
): Unit

See fchown(2).

fcntlInt

Added in API level 30

static fun fcntlInt(
    fd: FileDescriptor, 
    cmd: Int, 
    arg: Int
): Int

See fcntl(2).

Parameters
`fd`	FileDescriptor: This value cannot be `null`.

fdatasync

Added in API level 21

static fun fdatasync(fd: FileDescriptor!): Unit

See fdatasync(2).

fstat

Added in API level 21

static fun fstat(fd: FileDescriptor!): StructStat!

See fstat(2).

fstatvfs

Added in API level 21

static fun fstatvfs(fd: FileDescriptor!): StructStatVfs!

See fstatvfs(2).

fsync

Added in API level 21

static fun fsync(fd: FileDescriptor!): Unit

See fsync(2).

ftruncate

Added in API level 21

static fun ftruncate(
    fd: FileDescriptor!, 
    length: Long
): Unit

See ftruncate(2).

gai_strerror

Added in API level 21

static fun gai_strerror(error: Int): String!

See gai_strerror(3).

getegid

Added in API level 21

static fun getegid(): Int

See getegid(2).

getenv

Added in API level 21

static fun getenv(name: String!): String!

See getenv(3).

geteuid

Added in API level 21

static fun geteuid(): Int

See geteuid(2).

getgid

Added in API level 21

static fun getgid(): Int

See getgid(2).

getpeername

Added in API level 21

static fun getpeername(fd: FileDescriptor!): SocketAddress!

See getpeername(2).

getpid

Added in API level 21

static fun getpid(): Int

See getpid(2).

getppid

Added in API level 21

static fun getppid(): Int

See getppid(2).

getsockname

Added in API level 21

static fun getsockname(fd: FileDescriptor!): SocketAddress!

See getsockname(2).

getsockoptTimeval

Added in API level 29

static fun getsockoptTimeval(
    fd: FileDescriptor, 
    level: Int, 
    option: Int
): StructTimeval

See getsockopt(2).

Only for use with option values that return a struct timeval such as OsConstants.SO_RCVTIMEO and OsConstants.SO_SNDTIMEO. Use with other options may throw an IllegalArgumentException or return junk values.

Parameters
`fd`	FileDescriptor: This value cannot be `null`.

Return
`StructTimeval`	This value cannot be `null`.

gettid

Added in API level 21

static fun gettid(): Int

See gettid(2).

getuid

Added in API level 21

static fun getuid(): Int

See getuid(2).

getxattr

Added in API level 26

static fun getxattr(
    path: String!, 
    name: String!
): ByteArray!

See getxattr(2)

if_indextoname

Added in API level 21

static fun if_indextoname(index: Int): String!

See if_indextoname(3).

if_nametoindex

Added in API level 26

static fun if_nametoindex(name: String!): Int

See if_nametoindex(3).

inet_pton

Added in API level 21

static fun inet_pton(
    family: Int, 
    address: String!
): InetAddress!

See inet_pton(3).

isatty

Added in API level 21

static fun isatty(fd: FileDescriptor!): Boolean

See isatty(3).

kill

Added in API level 21

static fun kill(
    pid: Int, 
    signal: Int
): Unit

See kill(2).

lchown

Added in API level 21

static fun lchown(
    path: String!, 
    uid: Int, 
    gid: Int
): Unit

See lchown(2).

link

Added in API level 21

static fun link(
    oldPath: String!, 
    newPath: String!
): Unit

See link(2).

listen

Added in API level 21

static fun listen(
    fd: FileDescriptor!, 
    backlog: Int
): Unit

See listen(2).

listxattr

Added in API level 26

static fun listxattr(path: String!): Array<String!>!

See listxattr(2)

lseek

Added in API level 21

static fun lseek(
    fd: FileDescriptor!, 
    offset: Long, 
    whence: Int
): Long

See lseek(2).

lstat

Added in API level 21

static fun lstat(path: String!): StructStat!

See lstat(2).

memfd_create

Added in API level 30

static fun memfd_create(
    name: String, 
    flags: Int
): FileDescriptor

See memfd_create(2).

Parameters
`name`	String: This value cannot be `null`.

Return
`FileDescriptor`	This value cannot be `null`.

mincore

Added in API level 21

static fun mincore(
    address: Long, 
    byteCount: Long, 
    vector: ByteArray!
): Unit

See mincore(2).

mkdir

Added in API level 21

static fun mkdir(
    path: String!, 
    mode: Int
): Unit

See mkdir(2).

mkfifo

Added in API level 21

static fun mkfifo(
    path: String!, 
    mode: Int
): Unit

See mkfifo(3).

mlock

Added in API level 21

static fun mlock(
    address: Long, 
    byteCount: Long
): Unit

See mlock(2).

mmap

Added in API level 21

static fun mmap(
    address: Long, 
    byteCount: Long, 
    prot: Int, 
    flags: Int, 
    fd: FileDescriptor!, 
    offset: Long
): Long

See mmap(2).

msync

Added in API level 21

static fun msync(
    address: Long, 
    byteCount: Long, 
    flags: Int
): Unit

See msync(2).

munlock

Added in API level 21

static fun munlock(
    address: Long, 
    byteCount: Long
): Unit

See munlock(2).

munmap

Added in API level 21

static fun munmap(
    address: Long, 
    byteCount: Long
): Unit

See munmap(2).

open

Added in API level 21

static fun open(
    path: String!, 
    flags: Int, 
    mode: Int
): FileDescriptor!

See open(2).

pipe

Added in API level 21

static fun pipe(): Array<FileDescriptor!>!

See pipe(2).

poll

Added in API level 21

static fun poll(
    fds: Array<StructPollfd!>!, 
    timeoutMs: Int
): Int

See poll(2).

Note that in Lollipop this could throw an ErrnoException with EINTR. In later releases, the implementation will automatically just restart the system call with an appropriately reduced timeout.

posix_fallocate

Added in API level 21

static fun posix_fallocate(
    fd: FileDescriptor!, 
    offset: Long, 
    length: Long
): Unit

See posix_fallocate(3).

prctl

Added in API level 21

static fun prctl(
    option: Int, 
    arg2: Long, 
    arg3: Long, 
    arg4: Long, 
    arg5: Long
): Int

See prctl(2).

pread

Added in API level 21

static fun pread(
    fd: FileDescriptor!, 
    bytes: ByteArray!, 
    byteOffset: Int, 
    byteCount: Int, 
    offset: Long
): Int

See pread(2).

pread

Added in API level 21

static fun pread(
    fd: FileDescriptor!, 
    buffer: ByteBuffer!, 
    offset: Long
): Int

See pread(2).

pwrite

Added in API level 21

static fun pwrite(
    fd: FileDescriptor!, 
    bytes: ByteArray!, 
    byteOffset: Int, 
    byteCount: Int, 
    offset: Long
): Int

See pwrite(2).

pwrite

Added in API level 21

static fun pwrite(
    fd: FileDescriptor!, 
    buffer: ByteBuffer!, 
    offset: Long
): Int

See pwrite(2).

read

Added in API level 21

static fun read(
    fd: FileDescriptor!, 
    bytes: ByteArray!, 
    byteOffset: Int, 
    byteCount: Int
): Int

See read(2).

read

Added in API level 21

static fun read(
    fd: FileDescriptor!, 
    buffer: ByteBuffer!
): Int

See read(2).

readlink

Added in API level 21

static fun readlink(path: String!): String!

See readlink(2).

readv

Added in API level 21

static fun readv(
    fd: FileDescriptor!, 
    buffers: Array<Any!>!, 
    offsets: IntArray!, 
    byteCounts: IntArray!
): Int

See readv(2).

recvfrom

Added in API level 21

static fun recvfrom(
    fd: FileDescriptor!, 
    bytes: ByteArray!, 
    byteOffset: Int, 
    byteCount: Int, 
    flags: Int, 
    srcAddress: InetSocketAddress!
): Int

See recvfrom(2).

recvfrom

Added in API level 21

static fun recvfrom(
    fd: FileDescriptor!, 
    buffer: ByteBuffer!, 
    flags: Int, 
    srcAddress: InetSocketAddress!
): Int

See recvfrom(2).

recvmsg

Added in API level 31

static fun recvmsg(
    fd: FileDescriptor, 
    msg: StructMsghdr, 
    flags: Int
): Int

See recvmsg(2).

Parameters
`fd`	FileDescriptor: This value cannot be `null`.
`msg`	StructMsghdr: This value cannot be `null`.

remove

Added in API level 21

static fun remove(path: String!): Unit

See remove(3).

removexattr

Added in API level 26

static fun removexattr(
    path: String!, 
    name: String!
): Unit

See removexattr(2).

rename

Added in API level 21

static fun rename(
    oldPath: String!, 
    newPath: String!
): Unit

See rename(2).

sendfile

Added in API level 28

static fun sendfile(
    outFd: FileDescriptor!, 
    inFd: FileDescriptor!, 
    offset: Int64Ref!, 
    byteCount: Long
): Long

See sendfile(2).

sendmsg

Added in API level 31

static fun sendmsg(
    fd: FileDescriptor, 
    msg: StructMsghdr, 
    flags: Int
): Int

See sendmsg(2).

Parameters
`fd`	FileDescriptor: This value cannot be `null`.
`msg`	StructMsghdr: This value cannot be `null`.

sendto

Added in API level 21

static fun sendto(
    fd: FileDescriptor!, 
    bytes: ByteArray!, 
    byteOffset: Int, 
    byteCount: Int, 
    flags: Int, 
    inetAddress: InetAddress!, 
    port: Int
): Int

See sendto(2).

sendto

Added in API level 29

static fun sendto(
    fd: FileDescriptor, 
    bytes: ByteArray, 
    byteOffset: Int, 
    byteCount: Int, 
    flags: Int, 
    address: SocketAddress?
): Int

See sendto(2).

Parameters
`fd`	FileDescriptor: This value cannot be `null`.
`bytes`	ByteArray: This value cannot be `null`.
`address`	SocketAddress?: This value may be `null`.

sendto

Added in API level 21

static fun sendto(
    fd: FileDescriptor!, 
    buffer: ByteBuffer!, 
    flags: Int, 
    inetAddress: InetAddress!, 
    port: Int
): Int

See sendto(2).

setegid

Added in API level 21
Deprecated in API level 29

static fun setegid(egid: Int): Unit

Deprecated: Android Applications do not have sufficient privileges to call this method.

See setegid(2).

setenv

Added in API level 21

static fun setenv(
    name: String!, 
    value: String!, 
    overwrite: Boolean
): Unit

See setenv(3).

seteuid

Added in API level 21
Deprecated in API level 29

static fun seteuid(euid: Int): Unit

Deprecated: Android Applications do not have sufficient privileges to call this method.

See seteuid(2).

setgid

Added in API level 21
Deprecated in API level 29

static fun setgid(gid: Int): Unit

Deprecated: Android Applications do not have sufficient privileges to call this method.

See setgid(2).

setsid

Added in API level 21

static fun setsid(): Int

See setsid(2).

setsockoptInt

Added in API level 26

static fun setsockoptInt(
    fd: FileDescriptor!, 
    level: Int, 
    option: Int, 
    value: Int
): Unit

See setsockopt(2).

setsockoptTimeval

Added in API level 29

static fun setsockoptTimeval(
    fd: FileDescriptor, 
    level: Int, 
    option: Int, 
    value: StructTimeval
): Unit

See setsockopt(2).

Only for use with option values that take a struct timeval such as OsConstants.SO_RCVTIMEO and OsConstants.SO_SNDTIMEO. Use with other options is likely to cause incorrect behavior.

Parameters
`fd`	FileDescriptor: This value cannot be `null`.
`value`	StructTimeval: This value cannot be `null`.

setuid

Added in API level 21
Deprecated in API level 29

static fun setuid(uid: Int): Unit

Deprecated: Android Applications do not have sufficient privileges to call this method.

See setuid(2).

setxattr

Added in API level 26

static fun setxattr(
    path: String!, 
    name: String!, 
    value: ByteArray!, 
    flags: Int
): Unit

See setxattr(2)

shutdown

Added in API level 21

static fun shutdown(
    fd: FileDescriptor!, 
    how: Int
): Unit

See shutdown(2).

socket

Added in API level 21

static fun socket(
    domain: Int, 
    type: Int, 
    protocol: Int
): FileDescriptor!

See socket(2).

socketpair

Added in API level 21

static fun socketpair(
    domain: Int, 
    type: Int, 
    protocol: Int, 
    fd1: FileDescriptor!, 
    fd2: FileDescriptor!
): Unit

See socketpair(2).

stat

Added in API level 21

static fun stat(path: String!): StructStat!

See stat(2).

statvfs

Added in API level 21

static fun statvfs(path: String!): StructStatVfs!

See statvfs(2).

strerror

Added in API level 21

static fun strerror(errno: Int): String!

See strerror(2).

strsignal

Added in API level 21

static fun strsignal(signal: Int): String!

See strsignal(3).

symlink

Added in API level 21

static fun symlink(
    oldPath: String!, 
    newPath: String!
): Unit

See symlink(2).

sysconf

Added in API level 21

static fun sysconf(name: Int): Long

See sysconf(3).

tcdrain

Added in API level 21

static fun tcdrain(fd: FileDescriptor!): Unit

See tcdrain(3).

tcsendbreak

Added in API level 21

static fun tcsendbreak(
    fd: FileDescriptor!, 
    duration: Int
): Unit

See tcsendbreak(3).

umask

Added in API level 21

static fun umask(mask: Int): Int

See umask(2).

uname

Added in API level 21

static fun uname(): StructUtsname!

See uname(2).

unsetenv

Added in API level 21

static fun unsetenv(name: String!): Unit

See unsetenv(3).

write

Added in API level 21

static fun write(
    fd: FileDescriptor!, 
    bytes: ByteArray!, 
    byteOffset: Int, 
    byteCount: Int
): Int

See write(2).

write

Added in API level 21

static fun write(
    fd: FileDescriptor!, 
    buffer: ByteBuffer!
): Int

See write(2).

writev

Added in API level 21

static fun writev(
    fd: FileDescriptor!, 
    buffers: Array<Any!>!, 
    offsets: IntArray!, 
    byteCounts: IntArray!
): Int

See writev(2).