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Added in API level 21

Summary: Methods | Inherited Methods | [Expand All]

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 String`	`if_indextoname(int index)` See if_indextoname(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 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(2).
`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`	`rename(String oldPath, String newPath)` See rename(2).
`static long`	`sendfile(FileDescriptor outFd, FileDescriptor inFd, MutableLong inOffset, 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`	`setuid(int uid)` See setuid(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`	`waitpid(int pid, MutableInt status, int options)` See waitpid(2).
`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

From class


  
    java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long millis, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long millis)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

Public methods

accept

Added in API level 21

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

boolean access (String path, 
                int mode)

See access(2).

Parameters
`path`	`String`
`mode`	`int`

Returns
`boolean`

Throws
`ErrnoException`

bind

Added in API level 21

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

void chmod (String path, 
                int mode)

See chmod(2).

Parameters
`path`	`String`
`mode`	`int`

Throws
`ErrnoException`

chown

Added in API level 21

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

void close (FileDescriptor fd)

See close(2).

Parameters
`fd`	`FileDescriptor`

Throws
`ErrnoException`

connect

Added in API level 21

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

FileDescriptor dup (FileDescriptor oldFd)

See dup(2).

Parameters
`oldFd`	`FileDescriptor`

Returns
`FileDescriptor`

Throws
`ErrnoException`

dup2

Added in API level 21

FileDescriptor dup2 (FileDescriptor oldFd, 
                int newFd)

See dup2(2).

Parameters
`oldFd`	`FileDescriptor`
`newFd`	`int`

Returns
`FileDescriptor`

Throws
`ErrnoException`

environ

Added in API level 21

String[] environ ()

See environ(3).

Returns
`String[]`

execv

Added in API level 21

void execv (String filename, 
                String[] argv)

See execv(2).

Parameters
`filename`	`String`
`argv`	`String`

Throws
`ErrnoException`

execve

Added in API level 21

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

void fchmod (FileDescriptor fd, 
                int mode)

See fchmod(2).

Parameters
`fd`	`FileDescriptor`
`mode`	`int`

Throws
`ErrnoException`

fchown

Added in API level 21

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

void fdatasync (FileDescriptor fd)

See fdatasync(2).

Parameters
`fd`	`FileDescriptor`

Throws
`ErrnoException`

fstat

Added in API level 21

StructStat fstat (FileDescriptor fd)

See fstat(2).

Parameters
`fd`	`FileDescriptor`

Returns
`StructStat`

Throws
`ErrnoException`

fstatvfs

Added in API level 21

StructStatVfs fstatvfs (FileDescriptor fd)

See fstatvfs(2).

Parameters
`fd`	`FileDescriptor`

Returns
`StructStatVfs`

Throws
`ErrnoException`

fsync

Added in API level 21

void fsync (FileDescriptor fd)

See fsync(2).

Parameters
`fd`	`FileDescriptor`

Throws
`ErrnoException`

ftruncate

Added in API level 21

void ftruncate (FileDescriptor fd, 
                long length)

See ftruncate(2).

Parameters
`fd`	`FileDescriptor`
`length`	`long`

Throws
`ErrnoException`

gai_strerror

Added in API level 21

String gai_strerror (int error)

See gai_strerror(3).

Parameters
`error`	`int`

Returns
`String`

getegid

Added in API level 21

int getegid ()

See getegid(2).

Returns
`int`

getenv

Added in API level 21

String getenv (String name)

See getenv(3).

Parameters
`name`	`String`

Returns
`String`

geteuid

Added in API level 21

int geteuid ()

See geteuid(2).

Returns
`int`

getgid

Added in API level 21

int getgid ()

See getgid(2).

Returns
`int`

getpeername

Added in API level 21

SocketAddress getpeername (FileDescriptor fd)

See getpeername(2).

Parameters
`fd`	`FileDescriptor`

Returns
`SocketAddress`

Throws
`ErrnoException`

getpid

Added in API level 21

int getpid ()

See getpid(2).

Returns
`int`

getppid

Added in API level 21

int getppid ()

See getppid(2).

Returns
`int`

getsockname

Added in API level 21

SocketAddress getsockname (FileDescriptor fd)

See getsockname(2).

Parameters
`fd`	`FileDescriptor`

Returns
`SocketAddress`

Throws
`ErrnoException`

gettid

Added in API level 21

int gettid ()

See gettid(2).

Returns
`int`

getuid

Added in API level 21

int getuid ()

See getuid(2).

Returns
`int`

if_indextoname

Added in API level 21

String if_indextoname (int index)

See if_indextoname(3).

Parameters
`index`	`int`

Returns
`String`

inet_pton

Added in API level 21

InetAddress inet_pton (int family, 
                String address)

See inet_pton(3).

Parameters
`family`	`int`
`address`	`String`

Returns
`InetAddress`

isatty

Added in API level 21

boolean isatty (FileDescriptor fd)

See isatty(3).

Parameters
`fd`	`FileDescriptor`

Returns
`boolean`

kill

Added in API level 21

void kill (int pid, 
                int signal)

See kill(2).

Parameters
`pid`	`int`
`signal`	`int`

Throws
`ErrnoException`

lchown

Added in API level 21

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

void link (String oldPath, 
                String newPath)

See link(2).

Parameters
`oldPath`	`String`
`newPath`	`String`

Throws
`ErrnoException`

listen

Added in API level 21

void listen (FileDescriptor fd, 
                int backlog)

See listen(2).

Parameters
`fd`	`FileDescriptor`
`backlog`	`int`

Throws
`ErrnoException`

lseek

Added in API level 21

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

StructStat lstat (String path)

See lstat(2).

Parameters
`path`	`String`

Returns
`StructStat`

Throws
`ErrnoException`

mincore

Added in API level 21

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

void mkdir (String path, 
                int mode)

See mkdir(2).

Parameters
`path`	`String`
`mode`	`int`

Throws
`ErrnoException`

mkfifo

Added in API level 21

void mkfifo (String path, 
                int mode)

See mkfifo(3).

Parameters
`path`	`String`
`mode`	`int`

Throws
`ErrnoException`

mlock

Added in API level 21

void mlock (long address, 
                long byteCount)

See mlock(2).

Parameters
`address`	`long`
`byteCount`	`long`

Throws
`ErrnoException`

mmap

Added in API level 21

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

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

void munlock (long address, 
                long byteCount)

See munlock(2).

Parameters
`address`	`long`
`byteCount`	`long`

Throws
`ErrnoException`

munmap

Added in API level 21

void munmap (long address, 
                long byteCount)

See munmap(2).

Parameters
`address`	`long`
`byteCount`	`long`

Throws
`ErrnoException`

open

Added in API level 21

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

FileDescriptor[] pipe ()

See pipe(2).

Returns
`FileDescriptor[]`

Throws
`ErrnoException`

poll

Added in API level 21

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

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

See posix_fallocate(2).

Parameters
`fd`	`FileDescriptor`
`offset`	`long`
`length`	`long`

Throws
`ErrnoException`

prctl

Added in API level 21

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

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

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

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

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

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

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

String readlink (String path)

See readlink(2).

Parameters
`path`	`String`

Returns
`String`

Throws
`ErrnoException`

readv

Added in API level 21

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

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

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

void remove (String path)

See remove(3).

Parameters
`path`	`String`

Throws
`ErrnoException`

rename

Added in API level 21

void rename (String oldPath, 
                String newPath)

See rename(2).

Parameters
`oldPath`	`String`
`newPath`	`String`

Throws
`ErrnoException`

sendfile

Added in API level 21

long sendfile (FileDescriptor outFd, 
                FileDescriptor inFd, 
                MutableLong inOffset, 
                long byteCount)

See sendfile(2).

Parameters
`outFd`	`FileDescriptor`
`inFd`	`FileDescriptor`
`inOffset`	`MutableLong`
`byteCount`	`long`

Returns
`long`

Throws
`ErrnoException`

sendto

Added in API level 21

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

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

void setegid (int egid)

See setegid(2).

Parameters
`egid`	`int`

Throws
`ErrnoException`

setenv

Added in API level 21

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

void seteuid (int euid)

See seteuid(2).

Parameters
`euid`	`int`

Throws
`ErrnoException`

setgid

Added in API level 21

void setgid (int gid)

See setgid(2).

Parameters
`gid`	`int`

Throws
`ErrnoException`

setsid

Added in API level 21

int setsid ()

See setsid(2).

Returns
`int`

Throws
`ErrnoException`

setuid

Added in API level 21

void setuid (int uid)

See setuid(2).

Parameters
`uid`	`int`

Throws
`ErrnoException`

shutdown

Added in API level 21

void shutdown (FileDescriptor fd, 
                int how)

See shutdown(2).

Parameters
`fd`	`FileDescriptor`
`how`	`int`

Throws
`ErrnoException`

socket

Added in API level 21

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

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

StructStat stat (String path)

See stat(2).

Parameters
`path`	`String`

Returns
`StructStat`

Throws
`ErrnoException`

statvfs

Added in API level 21

StructStatVfs statvfs (String path)

See statvfs(2).

Parameters
`path`	`String`

Returns
`StructStatVfs`

Throws
`ErrnoException`

strerror

Added in API level 21

String strerror (int errno)

See strerror(2).

Parameters
`errno`	`int`

Returns
`String`

strsignal

Added in API level 21

String strsignal (int signal)

See strsignal(3).

Parameters
`signal`	`int`

Returns
`String`

symlink

Added in API level 21

void symlink (String oldPath, 
                String newPath)

See symlink(2).

Parameters
`oldPath`	`String`
`newPath`	`String`

Throws
`ErrnoException`

sysconf

Added in API level 21

long sysconf (int name)

See sysconf(3).

Parameters
`name`	`int`

Returns
`long`

tcdrain

Added in API level 21

void tcdrain (FileDescriptor fd)

See tcdrain(3).

Parameters
`fd`	`FileDescriptor`

Throws
`ErrnoException`

tcsendbreak

Added in API level 21

void tcsendbreak (FileDescriptor fd, 
                int duration)

See tcsendbreak(3).

Parameters
`fd`	`FileDescriptor`
`duration`	`int`

Throws
`ErrnoException`

umask

Added in API level 21

int umask (int mask)

See umask(2).

Parameters
`mask`	`int`

Returns
`int`

uname

Added in API level 21

StructUtsname uname ()

See uname(2).

Returns
`StructUtsname`

unsetenv

Added in API level 21

void unsetenv (String name)

See unsetenv(3).

Parameters
`name`	`String`

Throws
`ErrnoException`

waitpid

Added in API level 21

int waitpid (int pid, 
                MutableInt status, 
                int options)

See waitpid(2).

Parameters
`pid`	`int`
`status`	`MutableInt`
`options`	`int`

Returns
`int`

Throws
`ErrnoException`

write

Added in API level 21

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

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

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`