```
public final class Os
extends Object
```
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.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static FileDescriptor`	`accept(FileDescriptor fd, InetSocketAddress peerAddress)`	See accept(2).
`static FileDescriptor`	`accept(FileDescriptor fd, SocketAddress peerAddress)`	TODO Change the public API by removing the overload above and unhiding this version.
`static boolean`	`access(String path, int mode)`	See access(2).
`static InetAddress[]`	`android_getaddrinfo(String node, StructAddrinfo hints, int netId)`
`static void`	`bind(FileDescriptor fd, InetAddress address, int port)`	See bind(2).
`static void`	`bind(FileDescriptor fd, SocketAddress address)`
`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 void`	`connect(FileDescriptor fd, SocketAddress address)`
`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 int`	`fcntlFlock(FileDescriptor fd, int cmd, StructFlock arg)`
`static int`	`fcntlInt(FileDescriptor fd, int cmd, int arg)`
`static int`	`fcntlVoid(FileDescriptor fd, int cmd)`
`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 String`	`getnameinfo(InetAddress address, int flags)`
`static SocketAddress`	`getpeername(FileDescriptor fd)`	See getpeername(2).
`static int`	`getpgid(int pid)`
`static int`	`getpid()`	See getpid(2).
`static int`	`getppid()`	See getppid(2).
`static StructPasswd`	`getpwnam(String name)`
`static StructPasswd`	`getpwuid(int uid)`
`static SocketAddress`	`getsockname(FileDescriptor fd)`	See getsockname(2).
`static int`	`getsockoptByte(FileDescriptor fd, int level, int option)`
`static InetAddress`	`getsockoptInAddr(FileDescriptor fd, int level, int option)`
`static int`	`getsockoptInt(FileDescriptor fd, int level, int option)`
`static StructLinger`	`getsockoptLinger(FileDescriptor fd, int level, int option)`
`static StructTimeval`	`getsockoptTimeval(FileDescriptor fd, int level, int option)`
`static StructUcred`	`getsockoptUcred(FileDescriptor fd, int level, int option)`
`static int`	`gettid()`	See gettid(2).
`static int`	`getuid()`	See getuid(2).
`static int`	`getxattr(String path, String name, byte[] outValue)`
`static String`	`if_indextoname(int index)`	See if_indextoname(3).
`static InetAddress`	`inet_pton(int family, String address)`	See inet_pton(3).
`static InetAddress`	`ioctlInetAddress(FileDescriptor fd, int cmd, String interfaceName)`
`static int`	`ioctlInt(FileDescriptor fd, int cmd, MutableInt arg)`
`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 FileDescriptor[]`	`pipe2(int flags)`
`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, byte[] bytes, int byteOffset, int byteCount, long offset)`	See pread(2).
`static int`	`pread(FileDescriptor fd, ByteBuffer buffer, 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)`
`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, byte[] bytes, int byteOffset, int byteCount, int flags, SocketAddress address)`
`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 void`	`setpgid(int pid, int pgid)`
`static void`	`setregid(int rgid, int egid)`
`static void`	`setreuid(int ruid, int euid)`
`static int`	`setsid()`	See setsid(2).
`static void`	`setsockoptByte(FileDescriptor fd, int level, int option, int value)`
`static void`	`setsockoptGroupReq(FileDescriptor fd, int level, int option, StructGroupReq value)`
`static void`	`setsockoptGroupSourceReq(FileDescriptor fd, int level, int option, StructGroupSourceReq value)`
`static void`	`setsockoptIfreq(FileDescriptor fd, int level, int option, String value)`
`static void`	`setsockoptInt(FileDescriptor fd, int level, int option, int value)`
`static void`	`setsockoptIpMreqn(FileDescriptor fd, int level, int option, int value)`
`static void`	`setsockoptLinger(FileDescriptor fd, int level, int option, StructLinger value)`
`static void`	`setsockoptTimeval(FileDescriptor fd, int level, int option, StructTimeval value)`
`static void`	`setuid(int uid)`	See setuid(2).
`static void`	`setxattr(String path, String name, byte[] value, int flags)`
`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`	`unlink(String pathname)`
`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, byte[] bytes, int byteOffset, int byteCount)`	See write(2).
`static int`	`write(FileDescriptor fd, ByteBuffer buffer)`	See write(2).
`static int`	`writev(FileDescriptor fd, Object[] buffers, int[] offsets, int[] byteCounts)`	See writev(2).

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

accept

public static FileDescriptor accept(FileDescriptor fd,
                                    InetSocketAddress peerAddress)
                             throws ErrnoException,
                                    SocketException

See accept(2).

Throws:: ErrnoException; SocketException

accept

public static FileDescriptor accept(FileDescriptor fd,
                                    SocketAddress peerAddress)
                             throws ErrnoException,
                                    SocketException

TODO Change the public API by removing the overload above and unhiding this version.

Throws:: ErrnoException; SocketException

access

public static boolean access(String path,
                             int mode)
                      throws ErrnoException

See access(2).

Throws:: ErrnoException

android_getaddrinfo

public static InetAddress[] android_getaddrinfo(String node,
                                                StructAddrinfo hints,
                                                int netId)
                                         throws GaiException

Throws:: GaiException

bind

public static void bind(FileDescriptor fd,
                        InetAddress address,
                        int port)
                 throws ErrnoException,
                        SocketException

See bind(2).

Throws:: ErrnoException; SocketException

bind

public static void bind(FileDescriptor fd,
                        SocketAddress address)
                 throws ErrnoException,
                        SocketException

Throws:: ErrnoException; SocketException

chmod

public static void chmod(String path,
                         int mode)
                  throws ErrnoException

See chmod(2).

Throws:: ErrnoException

chown

public static void chown(String path,
                         int uid,
                         int gid)
                  throws ErrnoException

See chown(2).

Throws:: ErrnoException

close

public static void close(FileDescriptor fd)
                  throws ErrnoException

See close(2).

Throws:: ErrnoException

connect

public static void connect(FileDescriptor fd,
                           InetAddress address,
                           int port)
                    throws ErrnoException,
                           SocketException

See connect(2).

Throws:: ErrnoException; SocketException

connect

public static void connect(FileDescriptor fd,
                           SocketAddress address)
                    throws ErrnoException,
                           SocketException

Throws:: ErrnoException; SocketException

dup

public static FileDescriptor dup(FileDescriptor oldFd)
                          throws ErrnoException

See dup(2).

Throws:: ErrnoException

dup2

public static FileDescriptor dup2(FileDescriptor oldFd,
                                  int newFd)
                           throws ErrnoException

See dup2(2).

Throws:: ErrnoException

environ
```
public static String[] environ()
```
See environ(3).

execv

public static void execv(String filename,
                         String[] argv)
                  throws ErrnoException

See execv(2).

Throws:: ErrnoException

execve

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

See execve(2).

Throws:: ErrnoException

fchmod

public static void fchmod(FileDescriptor fd,
                          int mode)
                   throws ErrnoException

See fchmod(2).

Throws:: ErrnoException

fchown

public static void fchown(FileDescriptor fd,
                          int uid,
                          int gid)
                   throws ErrnoException

See fchown(2).

Throws:: ErrnoException

fcntlFlock

public static int fcntlFlock(FileDescriptor fd,
                             int cmd,
                             StructFlock arg)
                      throws ErrnoException,
                             InterruptedIOException

Throws:: ErrnoException; InterruptedIOException

fcntlInt

public static int fcntlInt(FileDescriptor fd,
                           int cmd,
                           int arg)
                    throws ErrnoException

Throws:: ErrnoException

fcntlVoid

public static int fcntlVoid(FileDescriptor fd,
                            int cmd)
                     throws ErrnoException

Throws:: ErrnoException

fdatasync

public static void fdatasync(FileDescriptor fd)
                      throws ErrnoException

See fdatasync(2).

Throws:: ErrnoException

fstat

public static StructStat fstat(FileDescriptor fd)
                        throws ErrnoException

See fstat(2).

Throws:: ErrnoException

fstatvfs

public static StructStatVfs fstatvfs(FileDescriptor fd)
                              throws ErrnoException

See fstatvfs(2).

Throws:: ErrnoException

fsync

public static void fsync(FileDescriptor fd)
                  throws ErrnoException

See fsync(2).

Throws:: ErrnoException

ftruncate

public static void ftruncate(FileDescriptor fd,
                             long length)
                      throws ErrnoException

See ftruncate(2).

Throws:: ErrnoException

gai_strerror

public static String gai_strerror(int error)

See gai_strerror(3).

getegid
```
public static int getegid()
```
See getegid(2).

geteuid
```
public static int geteuid()
```
See geteuid(2).

getgid
```
public static int getgid()
```
See getgid(2).

getenv

public static String getenv(String name)

See getenv(3).

getnameinfo

public static String getnameinfo(InetAddress address,
                                 int flags)
                          throws GaiException

Throws:: GaiException

getpeername

public static SocketAddress getpeername(FileDescriptor fd)
                                 throws ErrnoException

See getpeername(2).

Throws:: ErrnoException

getpgid

public static int getpgid(int pid)
                   throws ErrnoException

Throws:: ErrnoException

getpid
```
public static int getpid()
```
See getpid(2).

getppid
```
public static int getppid()
```
See getppid(2).

getpwnam

public static StructPasswd getpwnam(String name)
                             throws ErrnoException

Throws:: ErrnoException

getpwuid

public static StructPasswd getpwuid(int uid)
                             throws ErrnoException

Throws:: ErrnoException

getsockname

public static SocketAddress getsockname(FileDescriptor fd)
                                 throws ErrnoException

See getsockname(2).

Throws:: ErrnoException

getsockoptByte

public static int getsockoptByte(FileDescriptor fd,
                                 int level,
                                 int option)
                          throws ErrnoException

Throws:: ErrnoException

getsockoptInAddr

public static InetAddress getsockoptInAddr(FileDescriptor fd,
                                           int level,
                                           int option)
                                    throws ErrnoException

Throws:: ErrnoException

getsockoptInt

public static int getsockoptInt(FileDescriptor fd,
                                int level,
                                int option)
                         throws ErrnoException

Throws:: ErrnoException

getsockoptLinger

public static StructLinger getsockoptLinger(FileDescriptor fd,
                                            int level,
                                            int option)
                                     throws ErrnoException

Throws:: ErrnoException

getsockoptTimeval

public static StructTimeval getsockoptTimeval(FileDescriptor fd,
                                              int level,
                                              int option)
                                       throws ErrnoException

Throws:: ErrnoException

getsockoptUcred

public static StructUcred getsockoptUcred(FileDescriptor fd,
                                          int level,
                                          int option)
                                   throws ErrnoException

Throws:: ErrnoException

gettid
```
public static int gettid()
```
See gettid(2).

getuid
```
public static int getuid()
```
See getuid(2).

getxattr

public static int getxattr(String path,
                           String name,
                           byte[] outValue)
                    throws ErrnoException

Throws:: ErrnoException

if_indextoname

public static String if_indextoname(int index)

See if_indextoname(3).

inet_pton

public static InetAddress inet_pton(int family,
                                    String address)

See inet_pton(3).

ioctlInetAddress

public static InetAddress ioctlInetAddress(FileDescriptor fd,
                                           int cmd,
                                           String interfaceName)
                                    throws ErrnoException

Throws:: ErrnoException

ioctlInt

public static int ioctlInt(FileDescriptor fd,
                           int cmd,
                           MutableInt arg)
                    throws ErrnoException

Throws:: ErrnoException

isatty

public static boolean isatty(FileDescriptor fd)

See isatty(3).

kill

public static void kill(int pid,
                        int signal)
                 throws ErrnoException

See kill(2).

Throws:: ErrnoException

lchown

public static void lchown(String path,
                          int uid,
                          int gid)
                   throws ErrnoException

See lchown(2).

Throws:: ErrnoException

link

public static void link(String oldPath,
                        String newPath)
                 throws ErrnoException

See link(2).

Throws:: ErrnoException

listen

public static void listen(FileDescriptor fd,
                          int backlog)
                   throws ErrnoException

See listen(2).

Throws:: ErrnoException

lseek

public static long lseek(FileDescriptor fd,
                         long offset,
                         int whence)
                  throws ErrnoException

See lseek(2).

Throws:: ErrnoException

lstat

public static StructStat lstat(String path)
                        throws ErrnoException

See lstat(2).

Throws:: ErrnoException

mincore

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

See mincore(2).

Throws:: ErrnoException

mkdir

public static void mkdir(String path,
                         int mode)
                  throws ErrnoException

See mkdir(2).

Throws:: ErrnoException

mkfifo

public static void mkfifo(String path,
                          int mode)
                   throws ErrnoException

See mkfifo(3).

Throws:: ErrnoException

mlock

public static void mlock(long address,
                         long byteCount)
                  throws ErrnoException

See mlock(2).

Throws:: ErrnoException

mmap

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

See mmap(2).

Throws:: ErrnoException

msync

public static void msync(long address,
                         long byteCount,
                         int flags)
                  throws ErrnoException

See msync(2).

Throws:: ErrnoException

munlock

public static void munlock(long address,
                           long byteCount)
                    throws ErrnoException

See munlock(2).

Throws:: ErrnoException

munmap

public static void munmap(long address,
                          long byteCount)
                   throws ErrnoException

See munmap(2).

Throws:: ErrnoException

open

public static FileDescriptor open(String path,
                                  int flags,
                                  int mode)
                           throws ErrnoException

See open(2).

Throws:: ErrnoException

pipe

public static FileDescriptor[] pipe()
                             throws ErrnoException

See pipe(2).

Throws:: ErrnoException

pipe2

public static FileDescriptor[] pipe2(int flags)
                              throws ErrnoException

Throws:: ErrnoException

poll
```
public static int poll(StructPollfd[] fds,
                       int timeoutMs)
                throws ErrnoException
```
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.

Throws:

ErrnoException

posix_fallocate

public static void posix_fallocate(FileDescriptor fd,
                                   long offset,
                                   long length)
                            throws ErrnoException

See posix_fallocate(2).

Throws:: ErrnoException

prctl

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

See prctl(2).

Throws:: ErrnoException

pread

public static int pread(FileDescriptor fd,
                        ByteBuffer buffer,
                        long offset)
                 throws ErrnoException,
                        InterruptedIOException

See pread(2).

Throws:: ErrnoException; InterruptedIOException

pread

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

See pread(2).

Throws:: ErrnoException; InterruptedIOException

pwrite

public static int pwrite(FileDescriptor fd,
                         ByteBuffer buffer,
                         long offset)
                  throws ErrnoException,
                         InterruptedIOException

See pwrite(2).

Throws:: ErrnoException; InterruptedIOException

pwrite

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

See pwrite(2).

Throws:: ErrnoException; InterruptedIOException

read

public static int read(FileDescriptor fd,
                       ByteBuffer buffer)
                throws ErrnoException,
                       InterruptedIOException

See read(2).

Throws:: ErrnoException; InterruptedIOException

read

public static int read(FileDescriptor fd,
                       byte[] bytes,
                       int byteOffset,
                       int byteCount)
                throws ErrnoException,
                       InterruptedIOException

See read(2).

Throws:: ErrnoException; InterruptedIOException

readlink

public static String readlink(String path)
                       throws ErrnoException

See readlink(2).

Throws:: ErrnoException

readv

public static int readv(FileDescriptor fd,
                        Object[] buffers,
                        int[] offsets,
                        int[] byteCounts)
                 throws ErrnoException,
                        InterruptedIOException

See readv(2).

Throws:: ErrnoException; InterruptedIOException

recvfrom

public static int recvfrom(FileDescriptor fd,
                           ByteBuffer buffer,
                           int flags,
                           InetSocketAddress srcAddress)
                    throws ErrnoException,
                           SocketException

See recvfrom(2).

Throws:: ErrnoException; SocketException

recvfrom

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

See recvfrom(2).

Throws:: ErrnoException; SocketException

remove

public static void remove(String path)
                   throws ErrnoException

See remove(3).

Throws:: ErrnoException

removexattr

public static void removexattr(String path,
                               String name)
                        throws ErrnoException

Throws:: ErrnoException

rename

public static void rename(String oldPath,
                          String newPath)
                   throws ErrnoException

See rename(2).

Throws:: ErrnoException

sendfile

public static long sendfile(FileDescriptor outFd,
                            FileDescriptor inFd,
                            MutableLong inOffset,
                            long byteCount)
                     throws ErrnoException

See sendfile(2).

Throws:: ErrnoException

sendto

public static int sendto(FileDescriptor fd,
                         ByteBuffer buffer,
                         int flags,
                         InetAddress inetAddress,
                         int port)
                  throws ErrnoException,
                         SocketException

See sendto(2).

Throws:: ErrnoException; SocketException

sendto

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

See sendto(2).

Throws:: ErrnoException; SocketException

sendto

public static int sendto(FileDescriptor fd,
                         byte[] bytes,
                         int byteOffset,
                         int byteCount,
                         int flags,
                         SocketAddress address)
                  throws ErrnoException,
                         SocketException

Throws:: ErrnoException; SocketException

setegid

public static void setegid(int egid)
                    throws ErrnoException

See setegid(2).

Throws:: ErrnoException

setenv

public static void setenv(String name,
                          String value,
                          boolean overwrite)
                   throws ErrnoException

See setenv(3).

Throws:: ErrnoException

seteuid

public static void seteuid(int euid)
                    throws ErrnoException

See seteuid(2).

Throws:: ErrnoException

setgid

public static void setgid(int gid)
                   throws ErrnoException

See setgid(2).

Throws:: ErrnoException

setpgid

public static void setpgid(int pid,
                           int pgid)
                    throws ErrnoException

Throws:: ErrnoException

setregid

public static void setregid(int rgid,
                            int egid)
                     throws ErrnoException

Throws:: ErrnoException

setreuid

public static void setreuid(int ruid,
                            int euid)
                     throws ErrnoException

Throws:: ErrnoException

setsid

public static int setsid()
                  throws ErrnoException

See setsid(2).

Throws:: ErrnoException

setsockoptByte

public static void setsockoptByte(FileDescriptor fd,
                                  int level,
                                  int option,
                                  int value)
                           throws ErrnoException

Throws:: ErrnoException

setsockoptIfreq

public static void setsockoptIfreq(FileDescriptor fd,
                                   int level,
                                   int option,
                                   String value)
                            throws ErrnoException

Throws:: ErrnoException

setsockoptInt

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

Throws:: ErrnoException

setsockoptIpMreqn

public static void setsockoptIpMreqn(FileDescriptor fd,
                                     int level,
                                     int option,
                                     int value)
                              throws ErrnoException

Throws:: ErrnoException

setsockoptGroupReq

public static void setsockoptGroupReq(FileDescriptor fd,
                                      int level,
                                      int option,
                                      StructGroupReq value)
                               throws ErrnoException

Throws:: ErrnoException

setsockoptGroupSourceReq

public static void setsockoptGroupSourceReq(FileDescriptor fd,
                                            int level,
                                            int option,
                                            StructGroupSourceReq value)
                                     throws ErrnoException

Throws:: ErrnoException

setsockoptLinger

public static void setsockoptLinger(FileDescriptor fd,
                                    int level,
                                    int option,
                                    StructLinger value)
                             throws ErrnoException

Throws:: ErrnoException

setsockoptTimeval

public static void setsockoptTimeval(FileDescriptor fd,
                                     int level,
                                     int option,
                                     StructTimeval value)
                              throws ErrnoException

Throws:: ErrnoException

setuid

public static void setuid(int uid)
                   throws ErrnoException

See setuid(2).

Throws:: ErrnoException

setxattr

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

Throws:: ErrnoException

shutdown

public static void shutdown(FileDescriptor fd,
                            int how)
                     throws ErrnoException

See shutdown(2).

Throws:: ErrnoException

socket

public static FileDescriptor socket(int domain,
                                    int type,
                                    int protocol)
                             throws ErrnoException

See socket(2).

Throws:: ErrnoException

socketpair

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

See socketpair(2).

Throws:: ErrnoException

stat

public static StructStat stat(String path)
                       throws ErrnoException

See stat(2).

Throws:: ErrnoException

statvfs

public static StructStatVfs statvfs(String path)
                             throws ErrnoException

See statvfs(2).

Throws:: ErrnoException

strerror

public static String strerror(int errno)

See strerror(2).

strsignal

public static String strsignal(int signal)

See strsignal(3).

symlink

public static void symlink(String oldPath,
                           String newPath)
                    throws ErrnoException

See symlink(2).

Throws:: ErrnoException

sysconf

public static long sysconf(int name)

See sysconf(3).

tcdrain

public static void tcdrain(FileDescriptor fd)
                    throws ErrnoException

See tcdrain(3).

Throws:: ErrnoException

tcsendbreak

public static void tcsendbreak(FileDescriptor fd,
                               int duration)
                        throws ErrnoException

See tcsendbreak(3).

Throws:: ErrnoException

umask
```
public static int umask(int mask)
```
See umask(2).

uname
```
public static StructUtsname uname()
```
See uname(2).

unlink

public static void unlink(String pathname)
                   throws ErrnoException

Throws:: ErrnoException

unsetenv

public static void unsetenv(String name)
                     throws ErrnoException

See unsetenv(3).

Throws:: ErrnoException

waitpid

public static int waitpid(int pid,
                          MutableInt status,
                          int options)
                   throws ErrnoException

See waitpid(2).

Throws:: ErrnoException

write

public static int write(FileDescriptor fd,
                        ByteBuffer buffer)
                 throws ErrnoException,
                        InterruptedIOException

See write(2).

Throws:: ErrnoException; InterruptedIOException

write

public static int write(FileDescriptor fd,
                        byte[] bytes,
                        int byteOffset,
                        int byteCount)
                 throws ErrnoException,
                        InterruptedIOException

See write(2).

Throws:: ErrnoException; InterruptedIOException

writev

public static int writev(FileDescriptor fd,
                         Object[] buffers,
                         int[] offsets,
                         int[] byteCounts)
                  throws ErrnoException,
                         InterruptedIOException

See writev(2).

Throws:: ErrnoException; InterruptedIOException

Class Os

Method Summary

Methods inherited from class java.lang.Object

Method Detail

accept

accept

access

android_getaddrinfo

bind

bind

chmod

chown

close

connect

connect

dup

dup2

environ

execv

execve

fchmod

fchown

fcntlFlock

fcntlInt

fcntlVoid

fdatasync

fstat

fstatvfs

fsync

ftruncate

gai_strerror

getegid

geteuid

getgid

getenv

getnameinfo

getpeername

getpgid

getpid

getppid

getpwnam

getpwuid

getsockname

getsockoptByte

getsockoptInAddr

getsockoptInt

getsockoptLinger

getsockoptTimeval

getsockoptUcred

gettid

getuid

getxattr

if_indextoname

inet_pton

ioctlInetAddress

ioctlInt

isatty

kill

lchown

link

listen

lseek

lstat

mincore

mkdir

mkfifo

mlock

mmap

msync

munlock

munmap

open

pipe

pipe2

poll

posix_fallocate

prctl

pread

pread

pwrite