1 /* 2 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include "jni.h" 27 #include "jni_util.h" 28 29 /* 30 * Macros to use the right data type for file descriptors 31 */ 32 #define FD jint 33 34 /* 35 * Prototypes for functions in io_util_md.c called from io_util.c, 36 * FileDescriptor.c, FileInputStream.c, FileOutputStream.c, 37 * UnixFileSystem_md.c 38 */ 39 ssize_t handleWrite(FD fd, const void *buf, jint len); 40 ssize_t handleRead(FD fd, void *buf, jint len); 41 jint handleAvailable(FD fd, jlong *pbytes); 42 jint handleSetLength(FD fd, jlong length); 43 jlong handleGetLength(FD fd); 44 FD handleOpen(const char *path, int oflag, int mode); 45 46 /* 47 * Functions to get fd from the java.io.FileDescriptor field 48 * of an object. These functions rely on having an appropriately 49 * defined object with a FileDescriptor object at the fid offset. 50 * If the FD object is null, return -1 to avoid crashing VM. 51 */ 52 FD getFD(JNIEnv *env, jobject cur, jfieldID fid); 53 54 /* 55 * Macros to set/get fd when inside java.io.FileDescriptor 56 */ 57 #define THIS_FD(obj) (*env)->GetIntField(env, obj, IO_fd_fdID) 58 59 /* 60 * Route the routines 61 */ 62 #define IO_Sync fsync 63 #define IO_Read handleRead 64 #define IO_Write handleWrite 65 #define IO_Append handleWrite 66 #define IO_Available handleAvailable 67 #define IO_SetLength handleSetLength 68 #define IO_GetLength handleGetLength 69 70 #ifdef _ALLBSD_SOURCE 71 #define open64 open 72 #define fstat64 fstat 73 #define stat64 stat 74 #define lseek64 lseek 75 #define ftruncate64 ftruncate 76 #define IO_Lseek lseek 77 #else 78 #define IO_Lseek lseek64 79 #endif 80 81 /* 82 * On Solaris, the handle field is unused 83 */ 84 #define SET_HANDLE(fd) return (jlong)-1 85 86 /* 87 * Retry the operation if it is interrupted 88 */ 89 #define RESTARTABLE(_cmd, _result) \ 90 do { \ 91 _result = _cmd; \ 92 } while ((_result == -1) && (errno == EINTR)) 93 94 void fileDescriptorClose(JNIEnv *env, jobject this); 95 96 #ifdef MACOSX 97 jstring newStringPlatform(JNIEnv *env, const char* str); 98 #endif 99