lightbulb_outline Please take our October 2018 developer survey. Start survey
added in API level 21

Os

public final class Os
extends Object

java.lang.Object
   ↳ 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(FileDescriptor fd, InetSocketAddress peerAddress)

See accept(2).

static boolean access(String path, int mode)

See access(2).

static void bind(FileDescriptor fd, InetAddress address, int port)

See bind(2).

static void chmod(String path, int mode)

See chmod(2).

static void chown(String path, int uid, int gid)

See chown(2).

static void close(FileDescriptor fd)

See close(2).

static void connect(FileDescriptor fd, InetAddress address, int port)

See connect(2).

static FileDescriptor dup(FileDescriptor oldFd)

See dup(2).

static FileDescriptor dup2(FileDescriptor oldFd, int newFd)

See dup2(2).

static String[] environ()

See environ(3).

static void execv(String filename, String[] argv)

See execv(2).

static void execve(String filename, String[] argv, String[] envp)

See execve(2).

static void fchmod(FileDescriptor fd, int mode)

See fchmod(2).

static void fchown(FileDescriptor fd, int uid, int gid)

See fchown(2).

static void fdatasync(FileDescriptor fd)

See fdatasync(2).

static StructStat fstat(FileDescriptor fd)

See fstat(2).

static StructStatVfs fstatvfs(FileDescriptor fd)

See fstatvfs(2).

static void fsync(FileDescriptor fd)

See fsync(2).

static void ftruncate(FileDescriptor fd, long length)

See ftruncate(2).

static String gai_strerror(int error)

See gai_strerror(3).

static int getegid()

See getegid(2).

static String getenv(String name)

See getenv(3).

static int geteuid()

See geteuid(2).

static int getgid()

See getgid(2).

static SocketAddress getpeername(FileDescriptor fd)

See getpeername(2).

static int getpid()

See getpid(2).

static int getppid()

See getppid(2).

static SocketAddress getsockname(FileDescriptor fd)

See getsockname(2).

static int gettid()

See gettid(2).

static int getuid()

See getuid(2).

static byte[] getxattr(String path, String name)

See getxattr(2)

static String if_indextoname(int index)

See if_indextoname(3).

static int if_nametoindex(String name)

See if_nametoindex(3).

static InetAddress inet_pton(int family, String address)

See inet_pton(3).

static boolean isatty(FileDescriptor fd)

See isatty(3).

static void kill(int pid, int signal)

See kill(2).

static void lchown(String path, int uid, int gid)

See lchown(2).

static void link(String oldPath, String newPath)

See link(2).

static void listen(FileDescriptor fd, int backlog)

See listen(2).

static String[] listxattr(String path)

See listxattr(2)

static long lseek(FileDescriptor fd, long offset, int whence)

See lseek(2).

static StructStat lstat(String path)

See lstat(2).

static void mincore(long address, long byteCount, byte[] vector)

See mincore(2).

static void mkdir(String path, int mode)

See mkdir(2).

static void mkfifo(String path, int mode)

See mkfifo(3).

static void mlock(long address, long byteCount)

See mlock(2).

static long mmap(long address, long byteCount, int prot, int flags, FileDescriptor fd, long offset)

See mmap(2).

static void msync(long address, long byteCount, int flags)

See msync(2).

static void munlock(long address, long byteCount)

See munlock(2).

static void munmap(long address, long byteCount)

See munmap(2).

static FileDescriptor open(String path, int flags, int mode)

See open(2).

static FileDescriptor[] pipe()

See pipe(2).

static int poll(StructPollfd[] fds, int timeoutMs)

See poll(2).

static void posix_fallocate(FileDescriptor fd, long offset, long length)

See posix_fallocate(3).

static int prctl(int option, long arg2, long arg3, long arg4, long arg5)

See prctl(2).

static int pread(FileDescriptor fd, ByteBuffer buffer, long offset)

See pread(2).

static int pread(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, long offset)

See pread(2).

static int pwrite(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, long offset)

See pwrite(2).

static int pwrite(FileDescriptor fd, ByteBuffer buffer, long offset)

See pwrite(2).

static int read(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount)

See read(2).

static int read(FileDescriptor fd, ByteBuffer buffer)

See read(2).

static String readlink(String path)

See readlink(2).

static int readv(FileDescriptor fd, Object[] buffers, int[] offsets, int[] byteCounts)

See readv(2).

static int recvfrom(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, int flags, InetSocketAddress srcAddress)

See recvfrom(2).

static int recvfrom(FileDescriptor fd, ByteBuffer buffer, int flags, InetSocketAddress srcAddress)

See recvfrom(2).

static void remove(String path)

See remove(3).

static void removexattr(String path, String name)

See removexattr(2).

static void rename(String oldPath, String newPath)

See rename(2).

static long sendfile(FileDescriptor outFd, FileDescriptor inFd, Int64Ref offset, long byteCount)

See sendfile(2).

static int sendto(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, int flags, InetAddress inetAddress, int port)

See sendto(2).

static int sendto(FileDescriptor fd, ByteBuffer buffer, int flags, InetAddress inetAddress, int port)

See sendto(2).

static void setegid(int egid)

See setegid(2).

static void setenv(String name, String value, boolean overwrite)

See setenv(3).

static void seteuid(int euid)

See seteuid(2).

static void setgid(int gid)

See setgid(2).

static int setsid()

See setsid(2).

static void setsockoptInt(FileDescriptor fd, int level, int option, int value)

See setsockopt(2).

static void setuid(int uid)

See setuid(2).

static void setxattr(String path, String name, byte[] value, int flags)

See setxattr(2)

static void shutdown(FileDescriptor fd, int how)

See shutdown(2).

static FileDescriptor socket(int domain, int type, int protocol)

See socket(2).

static void socketpair(int domain, int type, int protocol, FileDescriptor fd1, FileDescriptor fd2)

See socketpair(2).

static StructStat stat(String path)

See stat(2).

static StructStatVfs statvfs(String path)

See statvfs(2).

static String strerror(int errno)

See strerror(2).

static String strsignal(int signal)

See strsignal(3).

static void symlink(String oldPath, String newPath)

See symlink(2).

static long sysconf(int name)

See sysconf(3).

static void tcdrain(FileDescriptor fd)

See tcdrain(3).

static void tcsendbreak(FileDescriptor fd, int duration)

See tcsendbreak(3).

static int umask(int mask)

See umask(2).

static StructUtsname uname()

See uname(2).

static void unsetenv(String name)

See unsetenv(3).

static int write(FileDescriptor fd, ByteBuffer buffer)

See write(2).

static int write(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount)

See write(2).

static int writev(FileDescriptor fd, Object[] buffers, int[] offsets, int[] byteCounts)

See writev(2).

Inherited methods

Public methods

accept

added in API level 21
public static FileDescriptor accept (FileDescriptor fd, 
                InetSocketAddress peerAddress)

See accept(2).

Parameters
fd FileDescriptor

peerAddress InetSocketAddress

Returns
FileDescriptor

Throws
ErrnoException
SocketException

access

added in API level 21
public static boolean access (String path, 
                int mode)

See access(2).

Parameters
path String

mode int

Returns
boolean

Throws
ErrnoException

bind

added in API level 21
public static void bind (FileDescriptor fd, 
                InetAddress address, 
                int port)

See bind(2).

Parameters
fd FileDescriptor

address InetAddress

port int

Throws
ErrnoException
SocketException

chmod

added in API level 21
public static void chmod (String path, 
                int mode)

See chmod(2).

Parameters
path String

mode int

Throws
ErrnoException

chown

added in API level 21
public static void chown (String path, 
                int uid, 
                int gid)

See chown(2).

Parameters
path String

uid int

gid int

Throws
ErrnoException

close

added in API level 21
public static void close (FileDescriptor fd)

See close(2).

Parameters
fd FileDescriptor

Throws
ErrnoException

connect

added in API level 21
public static void connect (FileDescriptor fd, 
                InetAddress address, 
                int port)

See connect(2).

Parameters
fd FileDescriptor

address InetAddress

port int

Throws
ErrnoException
SocketException

dup

added in API level 21
public static FileDescriptor dup (FileDescriptor oldFd)

See dup(2).

Parameters
oldFd FileDescriptor

Returns
FileDescriptor

Throws
ErrnoException

dup2

added in API level 21
public static FileDescriptor dup2 (FileDescriptor oldFd, 
                int newFd)

See dup2(2).

Parameters
oldFd FileDescriptor

newFd int

Returns
FileDescriptor

Throws
ErrnoException

environ

added in API level 21
public static String[] environ ()

See environ(3).

Returns
String[]

execv

added in API level 21
public static void execv (String filename, 
                String[] argv)

See execv(2).

Parameters
filename String

argv String

Throws
ErrnoException

execve

added in API level 21
public static void execve (String filename, 
                String[] argv, 
                String[] envp)

See execve(2).

Parameters
filename String

argv String

envp String

Throws
ErrnoException

fchmod

added in API level 21
public static void fchmod (FileDescriptor fd, 
                int mode)

See fchmod(2).

Parameters
fd FileDescriptor

mode int

Throws
ErrnoException

fchown

added in API level 21
public static void fchown (FileDescriptor fd, 
                int uid, 
                int gid)

See fchown(2).

Parameters
fd FileDescriptor

uid int

gid int

Throws
ErrnoException

fdatasync

added in API level 21
public static void fdatasync (FileDescriptor fd)

See fdatasync(2).

Parameters
fd FileDescriptor

Throws
ErrnoException

fstat

added in API level 21
public static StructStat fstat (FileDescriptor fd)

See fstat(2).

Parameters
fd FileDescriptor

Returns
StructStat

Throws
ErrnoException

fstatvfs

added in API level 21
public static StructStatVfs fstatvfs (FileDescriptor fd)

See fstatvfs(2).

Parameters
fd FileDescriptor

Returns
StructStatVfs

Throws
ErrnoException

fsync

added in API level 21
public static void fsync (FileDescriptor fd)

See fsync(2).

Parameters
fd FileDescriptor

Throws
ErrnoException

ftruncate

added in API level 21
public static void ftruncate (FileDescriptor fd, 
                long length)

See ftruncate(2).

Parameters
fd FileDescriptor

length long

Throws
ErrnoException

gai_strerror

added in API level 21
public static String gai_strerror (int error)

See gai_strerror(3).

Parameters
error int

Returns
String

getegid

added in API level 21
public static int getegid ()

See getegid(2).

Returns
int

getenv

added in API level 21
public static String getenv (String name)

See getenv(3).

Parameters
name String

Returns
String

geteuid

added in API level 21
public static int geteuid ()

See geteuid(2).

Returns
int

getgid

added in API level 21
public static int getgid ()

See getgid(2).

Returns
int

getpeername

added in API level 21
public static SocketAddress getpeername (FileDescriptor fd)

See getpeername(2).

Parameters
fd FileDescriptor

Returns
SocketAddress

Throws
ErrnoException

getpid

added in API level 21
public static int getpid ()

See getpid(2).

Returns
int

getppid

added in API level 21
public static int getppid ()

See getppid(2).

Returns
int

getsockname

added in API level 21
public static SocketAddress getsockname (FileDescriptor fd)

See getsockname(2).

Parameters
fd FileDescriptor

Returns
SocketAddress

Throws
ErrnoException

gettid

added in API level 21
public static int gettid ()

See gettid(2).

Returns
int

getuid

added in API level 21
public static int getuid ()

See getuid(2).

Returns
int

getxattr

added in API level 26
public static byte[] getxattr (String path, 
                String name)

See getxattr(2)

Parameters
path String

name String

Returns
byte[]

Throws
ErrnoException

if_indextoname

added in API level 21
public static String if_indextoname (int index)

See if_indextoname(3).

Parameters
index int

Returns
String

if_nametoindex

added in API level 26
public static int if_nametoindex (String name)

See if_nametoindex(3).

Parameters
name String

Returns
int

inet_pton

added in API level 21
public static InetAddress inet_pton (int family, 
                String address)

See inet_pton(3).

Parameters
family int

address String

Returns
InetAddress

isatty

added in API level 21
public static boolean isatty (FileDescriptor fd)

See isatty(3).

Parameters
fd FileDescriptor

Returns
boolean

kill

added in API level 21
public static void kill (int pid, 
                int signal)

See kill(2).

Parameters
pid int

signal int

Throws
ErrnoException

lchown

added in API level 21
public static void lchown (String path, 
                int uid, 
                int gid)

See lchown(2).

Parameters
path String

uid int

gid int

Throws
ErrnoException

link

added in API level 21
public static void link (String oldPath, 
                String newPath)

See link(2).

Parameters
oldPath String

newPath String

Throws
ErrnoException

listen

added in API level 21
public static void listen (FileDescriptor fd, 
                int backlog)

See listen(2).

Parameters
fd FileDescriptor

backlog int

Throws
ErrnoException

listxattr

added in API level 26
public static String[] listxattr (String path)

See listxattr(2)

Parameters
path String

Returns
String[]

Throws
ErrnoException

lseek

added in API level 21
public static long lseek (FileDescriptor fd, 
                long offset, 
                int whence)

See lseek(2).

Parameters
fd FileDescriptor

offset long

whence int

Returns
long

Throws
ErrnoException

lstat

added in API level 21
public static StructStat lstat (String path)

See lstat(2).

Parameters
path String

Returns
StructStat

Throws
ErrnoException

mincore

added in API level 21
public static void mincore (long address, 
                long byteCount, 
                byte[] vector)

See mincore(2).

Parameters
address long

byteCount long

vector byte

Throws
ErrnoException

mkdir

added in API level 21
public static void mkdir (String path, 
                int mode)

See mkdir(2).

Parameters
path String

mode int

Throws
ErrnoException

mkfifo

added in API level 21
public static void mkfifo (String path, 
                int mode)

See mkfifo(3).

Parameters
path String

mode int

Throws
ErrnoException

mlock

added in API level 21
public static void mlock (long address, 
                long byteCount)

See mlock(2).

Parameters
address long

byteCount long

Throws
ErrnoException

mmap

added in API level 21
public static long mmap (long address, 
                long byteCount, 
                int prot, 
                int flags, 
                FileDescriptor fd, 
                long offset)

See mmap(2).

Parameters
address long

byteCount long

prot int

flags int

fd FileDescriptor

offset long

Returns
long

Throws
ErrnoException

msync

added in API level 21
public static void msync (long address, 
                long byteCount, 
                int flags)

See msync(2).

Parameters
address long

byteCount long

flags int

Throws
ErrnoException

munlock

added in API level 21
public static void munlock (long address, 
                long byteCount)

See munlock(2).

Parameters
address long

byteCount long

Throws
ErrnoException

munmap

added in API level 21
public static void munmap (long address, 
                long byteCount)

See munmap(2).

Parameters
address long

byteCount long

Throws
ErrnoException

open

added in API level 21
public static FileDescriptor open (String path, 
                int flags, 
                int mode)

See open(2).

Parameters
path String

flags int

mode int

Returns
FileDescriptor

Throws
ErrnoException

pipe

added in API level 21
public static FileDescriptor[] pipe ()

See pipe(2).

Returns
FileDescriptor[]

Throws
ErrnoException

poll

added in API level 21
public static int poll (StructPollfd[] fds, 
                int timeoutMs)

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.

Parameters
fds StructPollfd

timeoutMs int

Returns
int

Throws
ErrnoException

posix_fallocate

added in API level 21
public static void posix_fallocate (FileDescriptor fd, 
                long offset, 
                long length)

See posix_fallocate(3).

Parameters
fd FileDescriptor

offset long

length long

Throws
ErrnoException

prctl

added in API level 21
public static int prctl (int option, 
                long arg2, 
                long arg3, 
                long arg4, 
                long arg5)

See prctl(2).

Parameters
option int

arg2 long

arg3 long

arg4 long

arg5 long

Returns
int

Throws
ErrnoException

pread

added in API level 21
public static int pread (FileDescriptor fd, 
                ByteBuffer buffer, 
                long offset)

See pread(2).

Parameters
fd FileDescriptor

buffer ByteBuffer

offset long

Returns
int

Throws
ErrnoException
InterruptedIOException

pread

added in API level 21
public static int pread (FileDescriptor fd, 
                byte[] bytes, 
                int byteOffset, 
                int byteCount, 
                long offset)

See pread(2).

Parameters
fd FileDescriptor

bytes byte

byteOffset int

byteCount int

offset long

Returns
int

Throws
ErrnoException
InterruptedIOException

pwrite

added in API level 21
public static int pwrite (FileDescriptor fd, 
                byte[] bytes, 
                int byteOffset, 
                int byteCount, 
                long offset)

See pwrite(2).

Parameters
fd FileDescriptor

bytes byte

byteOffset int

byteCount int

offset long

Returns
int

Throws
ErrnoException
InterruptedIOException

pwrite

added in API level 21
public static int pwrite (FileDescriptor fd, 
                ByteBuffer buffer, 
                long offset)

See pwrite(2).

Parameters
fd FileDescriptor

buffer ByteBuffer

offset long

Returns
int

Throws
ErrnoException
InterruptedIOException

read

added in API level 21
public static int read (FileDescriptor fd, 
                byte[] bytes, 
                int byteOffset, 
                int byteCount)

See read(2).

Parameters
fd FileDescriptor

bytes byte

byteOffset int

byteCount int

Returns
int

Throws
ErrnoException
InterruptedIOException

read

added in API level 21
public static int read (FileDescriptor fd, 
                ByteBuffer buffer)

See read(2).

Parameters
fd FileDescriptor

buffer ByteBuffer

Returns
int

Throws
ErrnoException
InterruptedIOException

readlink

added in API level 21
public static String readlink (String path)

See readlink(2).

Parameters
path String

Returns
String

Throws
ErrnoException

readv

added in API level 21
public static int readv (FileDescriptor fd, 
                Object[] buffers, 
                int[] offsets, 
                int[] byteCounts)

See readv(2).

Parameters
fd FileDescriptor

buffers Object

offsets int

byteCounts int

Returns
int

Throws
ErrnoException
InterruptedIOException

recvfrom

added in API level 21
public static int recvfrom (FileDescriptor fd, 
                byte[] bytes, 
                int byteOffset, 
                int byteCount, 
                int flags, 
                InetSocketAddress srcAddress)

See recvfrom(2).

Parameters
fd FileDescriptor

bytes byte

byteOffset int

byteCount int

flags int

srcAddress InetSocketAddress

Returns
int

Throws
ErrnoException
SocketException

recvfrom

added in API level 21
public static int recvfrom (FileDescriptor fd, 
                ByteBuffer buffer, 
                int flags, 
                InetSocketAddress srcAddress)

See recvfrom(2).

Parameters
fd FileDescriptor

buffer ByteBuffer

flags int

srcAddress InetSocketAddress

Returns
int

Throws
ErrnoException
SocketException

remove

added in API level 21
public static void remove (String path)

See remove(3).

Parameters
path String

Throws
ErrnoException

removexattr

added in API level 26
public static void removexattr (String path, 
                String name)

See removexattr(2).

Parameters
path String

name String

Throws
ErrnoException

rename

added in API level 21
public static void rename (String oldPath, 
                String newPath)

See rename(2).

Parameters
oldPath String

newPath String

Throws
ErrnoException

sendfile

added in API level 28
public static long sendfile (FileDescriptor outFd, 
                FileDescriptor inFd, 
                Int64Ref offset, 
                long byteCount)

See sendfile(2).

Parameters
outFd FileDescriptor

inFd FileDescriptor

offset Int64Ref

byteCount long

Returns
long

Throws
ErrnoException

sendto

added in API level 21
public static int sendto (FileDescriptor fd, 
                byte[] bytes, 
                int byteOffset, 
                int byteCount, 
                int flags, 
                InetAddress inetAddress, 
                int port)

See sendto(2).

Parameters
fd FileDescriptor

bytes byte

byteOffset int

byteCount int

flags int

inetAddress InetAddress

port int

Returns
int

Throws
ErrnoException
SocketException

sendto

added in API level 21
public static int sendto (FileDescriptor fd, 
                ByteBuffer buffer, 
                int flags, 
                InetAddress inetAddress, 
                int port)

See sendto(2).

Parameters
fd FileDescriptor

buffer ByteBuffer

flags int

inetAddress InetAddress

port int

Returns
int

Throws
ErrnoException
SocketException

setegid

added in API level 21
public static void setegid (int egid)

See setegid(2).

Parameters
egid int

Throws
ErrnoException

setenv

added in API level 21
public static void setenv (String name, 
                String value, 
                boolean overwrite)

See setenv(3).

Parameters
name String

value String

overwrite boolean

Throws
ErrnoException

seteuid

added in API level 21
public static void seteuid (int euid)

See seteuid(2).

Parameters
euid int

Throws
ErrnoException

setgid

added in API level 21
public static void setgid (int gid)

See setgid(2).

Parameters
gid int

Throws
ErrnoException

setsid

added in API level 21
public static int setsid ()

See setsid(2).

Returns
int

Throws
ErrnoException

setsockoptInt

added in API level 26
public static void setsockoptInt (FileDescriptor fd, 
                int level, 
                int option, 
                int value)

See setsockopt(2).

Parameters
fd FileDescriptor

level int

option int

value int

Throws
ErrnoException

setuid

added in API level 21
public static void setuid (int uid)

See setuid(2).

Parameters
uid int

Throws
ErrnoException

setxattr

added in API level 26
public static void setxattr (String path, 
                String name, 
                byte[] value, 
                int flags)

See setxattr(2)

Parameters
path String

name String

value byte

flags int

Throws
ErrnoException

shutdown

added in API level 21
public static void shutdown (FileDescriptor fd, 
                int how)

See shutdown(2).

Parameters
fd FileDescriptor

how int

Throws
ErrnoException

socket

added in API level 21
public static FileDescriptor socket (int domain, 
                int type, 
                int protocol)

See socket(2).

Parameters
domain int

type int

protocol int

Returns
FileDescriptor

Throws
ErrnoException

socketpair

added in API level 21
public static void socketpair (int domain, 
                int type, 
                int protocol, 
                FileDescriptor fd1, 
                FileDescriptor fd2)

See socketpair(2).

Parameters
domain int

type int

protocol int

fd1 FileDescriptor

fd2 FileDescriptor

Throws
ErrnoException

stat

added in API level 21
public static StructStat stat (String path)

See stat(2).

Parameters
path String

Returns
StructStat

Throws
ErrnoException

statvfs

added in API level 21
public static StructStatVfs statvfs (String path)

See statvfs(2).

Parameters
path String

Returns
StructStatVfs

Throws
ErrnoException

strerror

added in API level 21
public static String strerror (int errno)

See strerror(2).

Parameters
errno int

Returns
String

strsignal

added in API level 21
public static String strsignal (int signal)

See strsignal(3).

Parameters
signal int

Returns
String

symlink

added in API level 21
public static void symlink (String oldPath, 
                String newPath)

See symlink(2).

Parameters
oldPath String

newPath String

Throws
ErrnoException

sysconf

added in API level 21
public static long sysconf (int name)

See sysconf(3).

Parameters
name int

Returns
long

tcdrain

added in API level 21
public static void tcdrain (FileDescriptor fd)

See tcdrain(3).

Parameters
fd FileDescriptor

Throws
ErrnoException

tcsendbreak

added in API level 21
public static void tcsendbreak (FileDescriptor fd, 
                int duration)

See tcsendbreak(3).

Parameters
fd FileDescriptor

duration int

Throws
ErrnoException

umask

added in API level 21
public static int umask (int mask)

See umask(2).

Parameters
mask int

Returns
int

uname

added in API level 21
public static StructUtsname uname ()

See uname(2).

Returns
StructUtsname

unsetenv

added in API level 21
public static void unsetenv (String name)

See unsetenv(3).

Parameters
name String

Throws
ErrnoException

write

added in API level 21
public static int write (FileDescriptor fd, 
                ByteBuffer buffer)

See write(2).

Parameters
fd FileDescriptor

buffer ByteBuffer

Returns
int

Throws
ErrnoException
InterruptedIOException

write

added in API level 21
public static int write (FileDescriptor fd, 
                byte[] bytes, 
                int byteOffset, 
                int byteCount)

See write(2).

Parameters
fd FileDescriptor

bytes byte

byteOffset int

byteCount int

Returns
int

Throws
ErrnoException
InterruptedIOException

writev

added in API level 21
public static int writev (FileDescriptor fd, 
                Object[] buffers, 
                int[] offsets, 
                int[] byteCounts)

See writev(2).

Parameters
fd FileDescriptor

buffers Object

offsets int

byteCounts int

Returns
int

Throws
ErrnoException
InterruptedIOException