Posix.java revision bbac92e691de7d570928ddfba639067978e55b06 
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 java.io.FileDescriptor;
20import java.nio.ByteBuffer;
21import java.nio.NioUtils;
22
23public final class Posix implements Os {
24    Posix() { }
25
26    public native boolean access(String path, int mode) throws ErrnoException;
27    public native void chmod(String path, int mode) throws ErrnoException;
28    public native String[] environ();
29    public native int fcntlVoid(FileDescriptor fd, int cmd) throws ErrnoException;
30    public native int fcntlLong(FileDescriptor fd, int cmd, long arg) throws ErrnoException;
31    public native int fcntlFlock(FileDescriptor fd, int cmd, StructFlock arg) throws ErrnoException;
32    public native void fdatasync(FileDescriptor fd) throws ErrnoException;
33    public native StructStat fstat(FileDescriptor fd) throws ErrnoException;
34    public native StructStatFs fstatfs(FileDescriptor fd) throws ErrnoException;
35    public native void fsync(FileDescriptor fd) throws ErrnoException;
36    public native void ftruncate(FileDescriptor fd, long length) throws ErrnoException;
37    public native String getenv(String name);
38    public native int ioctlInt(FileDescriptor fd, int cmd, int arg) throws ErrnoException;
39    public native boolean isatty(FileDescriptor fd);
40    public native void listen(FileDescriptor fd, int backlog) throws ErrnoException;
41    public native long lseek(FileDescriptor fd, long offset, int whence) throws ErrnoException;
42    public native void mincore(long address, long byteCount, byte[] vector) throws ErrnoException;
43    public native void mkdir(String path, int mode) throws ErrnoException;
44    public native void mlock(long address, long byteCount) throws ErrnoException;
45    public native long mmap(long address, long byteCount, int prot, int flags, FileDescriptor fd, long offset) throws ErrnoException;
46    public native void msync(long address, long byteCount, int flags) throws ErrnoException;
47    public native void munlock(long address, long byteCount) throws ErrnoException;
48    public native void munmap(long address, long byteCount) throws ErrnoException;
49    public native FileDescriptor open(String path, int flags, int mode) throws ErrnoException;
50    public native FileDescriptor[] pipe() throws ErrnoException;
51    public native StructStat lstat(String path) throws ErrnoException;
52    public int read(FileDescriptor fd, ByteBuffer buffer) throws ErrnoException {
53        if (buffer.isDirect()) {
54            return readDirectBuffer(fd, buffer, buffer.position(), buffer.remaining());
55        }
56        return read(fd, NioUtils.unsafeArray(buffer), NioUtils.unsafeArrayOffset(buffer) + buffer.position(), buffer.remaining());
57    }
58    private native int readDirectBuffer(FileDescriptor fd, ByteBuffer buffer, int position, int remaining) throws ErrnoException;
59    public native int read(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount) throws ErrnoException;
60    public native int readv(FileDescriptor fd, Object[] buffers, int[] offsets, int[] byteCounts) throws ErrnoException;
61    public native void remove(String path) throws ErrnoException;
62    public native void rename(String oldPath, String newPath) throws ErrnoException;
63    public native void shutdown(FileDescriptor fd, int how) throws ErrnoException;
64    public native StructStat stat(String path) throws ErrnoException;
65    public native StructStatFs statfs(String path) throws ErrnoException;
66    public native String strerror(int errno);
67    public native void symlink(String oldPath, String newPath) throws ErrnoException;
68    public native long sysconf(int name);
69    public native StructUtsname uname() throws ErrnoException;
70    public int write(FileDescriptor fd, ByteBuffer buffer) throws ErrnoException {
71        if (buffer.isDirect()) {
72            return writeDirectBuffer(fd, buffer, buffer.position(), buffer.remaining());
73        }
74        return write(fd, NioUtils.unsafeArray(buffer), NioUtils.unsafeArrayOffset(buffer) + buffer.position(), buffer.remaining());
75    }
76    private native int writeDirectBuffer(FileDescriptor fd, ByteBuffer buffer, int position, int remaining) throws ErrnoException;
77    public native int write(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount) throws ErrnoException;
78    public native int writev(FileDescriptor fd, Object[] buffers, int[] offsets, int[] byteCounts) throws ErrnoException;
79}
80