Posix.java revision 30c669166d86d0bd133edfb67909665fb41d29b6 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package libcore.io;
18
19import android.system.ErrnoException;
20import android.system.GaiException;
21import android.system.StructAddrinfo;
22import android.system.StructFlock;
23import android.system.StructGroupReq;
24import android.system.StructGroupSourceReq;
25import android.system.StructLinger;
26import android.system.StructPasswd;
27import android.system.StructPollfd;
28import android.system.StructStat;
29import android.system.StructStatVfs;
30import android.system.StructTimeval;
31import android.system.StructUcred;
32import android.system.StructUtsname;
33import android.util.MutableInt;
34import android.util.MutableLong;
35import java.io.FileDescriptor;
36import java.io.InterruptedIOException;
37import java.net.InetAddress;
38import java.net.InetSocketAddress;
39import java.net.SocketAddress;
40import java.net.SocketException;
41import java.nio.ByteBuffer;
42import java.nio.NioUtils;
43
44public final class Posix implements Os {
45    Posix() { }
46
47    public native FileDescriptor accept(FileDescriptor fd, InetSocketAddress peerAddress) throws ErrnoException, SocketException;
48    public native boolean access(String path, int mode) throws ErrnoException;
49    public native InetAddress[] android_getaddrinfo(String node, StructAddrinfo hints, int netId) throws GaiException;
50    public native void bind(FileDescriptor fd, InetAddress address, int port) throws ErrnoException, SocketException;
51    public native void chmod(String path, int mode) throws ErrnoException;
52    public native void chown(String path, int uid, int gid) throws ErrnoException;
53    public native void close(FileDescriptor fd) throws ErrnoException;
54    public native void connect(FileDescriptor fd, InetAddress address, int port) throws ErrnoException, SocketException;
55    public native FileDescriptor dup(FileDescriptor oldFd) throws ErrnoException;
56    public native FileDescriptor dup2(FileDescriptor oldFd, int newFd) throws ErrnoException;
57    public native String[] environ();
58    public native void execv(String filename, String[] argv) throws ErrnoException;
59    public native void execve(String filename, String[] argv, String[] envp) throws ErrnoException;
60    public native void fchmod(FileDescriptor fd, int mode) throws ErrnoException;
61    public native void fchown(FileDescriptor fd, int uid, int gid) throws ErrnoException;
62    public native int fcntlFlock(FileDescriptor fd, int cmd, StructFlock arg) throws ErrnoException, InterruptedIOException;
63    public native int fcntlInt(FileDescriptor fd, int cmd, int arg) throws ErrnoException;
64    public native int fcntlVoid(FileDescriptor fd, int cmd) throws ErrnoException;
65    public native void fdatasync(FileDescriptor fd) throws ErrnoException;
66    public native StructStat fstat(FileDescriptor fd) throws ErrnoException;
67    public native StructStatVfs fstatvfs(FileDescriptor fd) throws ErrnoException;
68    public native void fsync(FileDescriptor fd) throws ErrnoException;
69    public native void ftruncate(FileDescriptor fd, long length) throws ErrnoException;
70    public native String gai_strerror(int error);
71    public native int getegid();
72    public native int geteuid();
73    public native int getgid();
74    public native String getenv(String name);
75    public native String getnameinfo(InetAddress address, int flags) throws GaiException;
76    public native SocketAddress getpeername(FileDescriptor fd) throws ErrnoException;
77    public native int getpgid(int pid);
78    public native int getpid();
79    public native int getppid();
80    public native StructPasswd getpwnam(String name) throws ErrnoException;
81    public native StructPasswd getpwuid(int uid) throws ErrnoException;
82    public native SocketAddress getsockname(FileDescriptor fd) throws ErrnoException;
83    public native int getsockoptByte(FileDescriptor fd, int level, int option) throws ErrnoException;
84    public native InetAddress getsockoptInAddr(FileDescriptor fd, int level, int option) throws ErrnoException;
85    public native int getsockoptInt(FileDescriptor fd, int level, int option) throws ErrnoException;
86    public native StructLinger getsockoptLinger(FileDescriptor fd, int level, int option) throws ErrnoException;
87    public native StructTimeval getsockoptTimeval(FileDescriptor fd, int level, int option) throws ErrnoException;
88    public native StructUcred getsockoptUcred(FileDescriptor fd, int level, int option) throws ErrnoException;
89    public native int gettid();
90    public native int getuid();
91    public native String if_indextoname(int index);
92    public native InetAddress inet_pton(int family, String address);
93    public native InetAddress ioctlInetAddress(FileDescriptor fd, int cmd, String interfaceName) throws ErrnoException;
94    public native int ioctlInt(FileDescriptor fd, int cmd, MutableInt arg) throws ErrnoException;
95    public native boolean isatty(FileDescriptor fd);
96    public native void kill(int pid, int signal) throws ErrnoException;
97    public native void lchown(String path, int uid, int gid) throws ErrnoException;
98    public native void link(String oldPath, String newPath) throws ErrnoException;
99    public native void listen(FileDescriptor fd, int backlog) throws ErrnoException;
100    public native long lseek(FileDescriptor fd, long offset, int whence) throws ErrnoException;
101    public native StructStat lstat(String path) throws ErrnoException;
102    public native void mincore(long address, long byteCount, byte[] vector) throws ErrnoException;
103    public native void mkdir(String path, int mode) throws ErrnoException;
104    public native void mkfifo(String path, int mode) throws ErrnoException;
105    public native void mlock(long address, long byteCount) throws ErrnoException;
106    public native long mmap(long address, long byteCount, int prot, int flags, FileDescriptor fd, long offset) throws ErrnoException;
107    public native void msync(long address, long byteCount, int flags) throws ErrnoException;
108    public native void munlock(long address, long byteCount) throws ErrnoException;
109    public native void munmap(long address, long byteCount) throws ErrnoException;
110    public native FileDescriptor open(String path, int flags, int mode) throws ErrnoException;
111    public native FileDescriptor[] pipe2(int flags) throws ErrnoException;
112    public native int poll(StructPollfd[] fds, int timeoutMs) throws ErrnoException;
113    public native void posix_fallocate(FileDescriptor fd, long offset, long length) throws ErrnoException;
114    public native int prctl(int option, long arg2, long arg3, long arg4, long arg5) throws ErrnoException;
115    public int pread(FileDescriptor fd, ByteBuffer buffer, long offset) throws ErrnoException, InterruptedIOException {
116        final int bytesRead;
117        final int position = buffer.position();
118
119        if (buffer.isDirect()) {
120            bytesRead = preadBytes(fd, buffer, position, buffer.remaining(), offset);
121        } else {
122            bytesRead = preadBytes(fd, NioUtils.unsafeArray(buffer), NioUtils.unsafeArrayOffset(buffer) + position, buffer.remaining(), offset);
123        }
124
125        maybeUpdateBufferPosition(buffer, position, bytesRead);
126        return bytesRead;
127    }
128    public int pread(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, long offset) throws ErrnoException, InterruptedIOException {
129        // This indirection isn't strictly necessary, but ensures that our public interface is type safe.
130        return preadBytes(fd, bytes, byteOffset, byteCount, offset);
131    }
132    private native int preadBytes(FileDescriptor fd, Object buffer, int bufferOffset, int byteCount, long offset) throws ErrnoException, InterruptedIOException;
133    public int pwrite(FileDescriptor fd, ByteBuffer buffer, long offset) throws ErrnoException, InterruptedIOException {
134        final int bytesWritten;
135        final int position = buffer.position();
136
137        if (buffer.isDirect()) {
138            bytesWritten = pwriteBytes(fd, buffer, position, buffer.remaining(), offset);
139        } else {
140            bytesWritten = pwriteBytes(fd, NioUtils.unsafeArray(buffer), NioUtils.unsafeArrayOffset(buffer) + position, buffer.remaining(), offset);
141        }
142
143        maybeUpdateBufferPosition(buffer, position, bytesWritten);
144        return bytesWritten;
145    }
146    public int pwrite(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, long offset) throws ErrnoException, InterruptedIOException {
147        // This indirection isn't strictly necessary, but ensures that our public interface is type safe.
148        return pwriteBytes(fd, bytes, byteOffset, byteCount, offset);
149    }
150    private native int pwriteBytes(FileDescriptor fd, Object buffer, int bufferOffset, int byteCount, long offset) throws ErrnoException, InterruptedIOException;
151    public int read(FileDescriptor fd, ByteBuffer buffer) throws ErrnoException, InterruptedIOException {
152        final int bytesRead;
153        final int position = buffer.position();
154
155        if (buffer.isDirect()) {
156            bytesRead = readBytes(fd, buffer, position, buffer.remaining());
157        } else {
158            bytesRead = readBytes(fd, NioUtils.unsafeArray(buffer), NioUtils.unsafeArrayOffset(buffer) + position, buffer.remaining());
159        }
160
161        maybeUpdateBufferPosition(buffer, position, bytesRead);
162        return bytesRead;
163    }
164    public int read(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount) throws ErrnoException, InterruptedIOException {
165        // This indirection isn't strictly necessary, but ensures that our public interface is type safe.
166        return readBytes(fd, bytes, byteOffset, byteCount);
167    }
168    private native int readBytes(FileDescriptor fd, Object buffer, int offset, int byteCount) throws ErrnoException, InterruptedIOException;
169    public native String readlink(String path) throws ErrnoException;
170    public native int readv(FileDescriptor fd, Object[] buffers, int[] offsets, int[] byteCounts) throws ErrnoException, InterruptedIOException;
171    public int recvfrom(FileDescriptor fd, ByteBuffer buffer, int flags, InetSocketAddress srcAddress) throws ErrnoException, SocketException {
172        final int bytesReceived;
173        final int position = buffer.position();
174
175        if (buffer.isDirect()) {
176            bytesReceived = recvfromBytes(fd, buffer, position, buffer.remaining(), flags, srcAddress);
177        } else {
178            bytesReceived = recvfromBytes(fd, NioUtils.unsafeArray(buffer), NioUtils.unsafeArrayOffset(buffer) + position, buffer.remaining(), flags, srcAddress);
179        }
180
181        maybeUpdateBufferPosition(buffer, position, bytesReceived);
182        return bytesReceived;
183    }
184    public int recvfrom(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, int flags, InetSocketAddress srcAddress) throws ErrnoException, SocketException {
185        // This indirection isn't strictly necessary, but ensures that our public interface is type safe.
186        return recvfromBytes(fd, bytes, byteOffset, byteCount, flags, srcAddress);
187    }
188    private native int recvfromBytes(FileDescriptor fd, Object buffer, int byteOffset, int byteCount, int flags, InetSocketAddress srcAddress) throws ErrnoException, SocketException;
189    public native void remove(String path) throws ErrnoException;
190    public native void rename(String oldPath, String newPath) throws ErrnoException;
191    public native long sendfile(FileDescriptor outFd, FileDescriptor inFd, MutableLong inOffset, long byteCount) throws ErrnoException;
192    public int sendto(FileDescriptor fd, ByteBuffer buffer, int flags, InetAddress inetAddress, int port) throws ErrnoException, SocketException {
193        final int bytesSent;
194        final int position = buffer.position();
195
196        if (buffer.isDirect()) {
197            bytesSent = sendtoBytes(fd, buffer, position, buffer.remaining(), flags, inetAddress, port);
198        } else {
199            bytesSent = sendtoBytes(fd, NioUtils.unsafeArray(buffer), NioUtils.unsafeArrayOffset(buffer) + position, buffer.remaining(), flags, inetAddress, port);
200        }
201
202        maybeUpdateBufferPosition(buffer, position, bytesSent);
203        return bytesSent;
204    }
205    public int sendto(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount, int flags, InetAddress inetAddress, int port) throws ErrnoException, SocketException {
206        // This indirection isn't strictly necessary, but ensures that our public interface is type safe.
207        return sendtoBytes(fd, bytes, byteOffset, byteCount, flags, inetAddress, port);
208    }
209    private native int sendtoBytes(FileDescriptor fd, Object buffer, int byteOffset, int byteCount, int flags, InetAddress inetAddress, int port) throws ErrnoException, SocketException;
210    public native void setegid(int egid) throws ErrnoException;
211    public native void setenv(String name, String value, boolean overwrite) throws ErrnoException;
212    public native void seteuid(int euid) throws ErrnoException;
213    public native void setgid(int gid) throws ErrnoException;
214    public native void setpgid(int pid, int pgid) throws ErrnoException;
215    public native void setregid(int rgid, int egid) throws ErrnoException;
216    public native void setreuid(int ruid, int euid) throws ErrnoException;
217    public native int setsid() throws ErrnoException;
218    public native void setsockoptByte(FileDescriptor fd, int level, int option, int value) throws ErrnoException;
219    public native void setsockoptIfreq(FileDescriptor fd, int level, int option, String value) throws ErrnoException;
220    public native void setsockoptInt(FileDescriptor fd, int level, int option, int value) throws ErrnoException;
221    public native void setsockoptIpMreqn(FileDescriptor fd, int level, int option, int value) throws ErrnoException;
222    public native void setsockoptGroupReq(FileDescriptor fd, int level, int option, StructGroupReq value) throws ErrnoException;
223    public native void setsockoptGroupSourceReq(FileDescriptor fd, int level, int option, StructGroupSourceReq value) throws ErrnoException;
224    public native void setsockoptLinger(FileDescriptor fd, int level, int option, StructLinger value) throws ErrnoException;
225    public native void setsockoptTimeval(FileDescriptor fd, int level, int option, StructTimeval value) throws ErrnoException;
226    public native void setuid(int uid) throws ErrnoException;
227    public native void shutdown(FileDescriptor fd, int how) throws ErrnoException;
228    public native FileDescriptor socket(int domain, int type, int protocol) throws ErrnoException;
229    public native void socketpair(int domain, int type, int protocol, FileDescriptor fd1, FileDescriptor fd2) throws ErrnoException;
230    public native StructStat stat(String path) throws ErrnoException;
231    public native StructStatVfs statvfs(String path) throws ErrnoException;
232    public native String strerror(int errno);
233    public native String strsignal(int signal);
234    public native void symlink(String oldPath, String newPath) throws ErrnoException;
235    public native long sysconf(int name);
236    public native void tcdrain(FileDescriptor fd) throws ErrnoException;
237    public native void tcsendbreak(FileDescriptor fd, int duration) throws ErrnoException;
238    public int umask(int mask) {
239        if ((mask & 0777) != mask) {
240            throw new IllegalArgumentException("Invalid umask: " + mask);
241        }
242        return umaskImpl(mask);
243    }
244    private native int umaskImpl(int mask);
245    public native StructUtsname uname();
246    public native void unsetenv(String name) throws ErrnoException;
247    public native int waitpid(int pid, MutableInt status, int options) throws ErrnoException;
248    public int write(FileDescriptor fd, ByteBuffer buffer) throws ErrnoException, InterruptedIOException {
249        final int bytesWritten;
250        final int position = buffer.position();
251        if (buffer.isDirect()) {
252            bytesWritten = writeBytes(fd, buffer, position, buffer.remaining());
253        } else {
254            bytesWritten = writeBytes(fd, NioUtils.unsafeArray(buffer), NioUtils.unsafeArrayOffset(buffer) + position, buffer.remaining());
255        }
256
257        maybeUpdateBufferPosition(buffer, position, bytesWritten);
258        return bytesWritten;
259    }
260    public int write(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount) throws ErrnoException, InterruptedIOException {
261        // This indirection isn't strictly necessary, but ensures that our public interface is type safe.
262        return writeBytes(fd, bytes, byteOffset, byteCount);
263    }
264    private native int writeBytes(FileDescriptor fd, Object buffer, int offset, int byteCount) throws ErrnoException, InterruptedIOException;
265    public native int writev(FileDescriptor fd, Object[] buffers, int[] offsets, int[] byteCounts) throws ErrnoException, InterruptedIOException;
266
267    private static void maybeUpdateBufferPosition(ByteBuffer buffer, int originalPosition, int bytesReadOrWritten) {
268        if (bytesReadOrWritten > 0) {
269            buffer.position(bytesReadOrWritten + originalPosition);
270        }
271    }
272}
273