1 /* 2 * Copyright (c) 1997, 2013, 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 <unistd.h> 27 #include <fcntl.h> 28 29 #include "jvm.h" 30 #include "io_util_md.h" 31 32 #include "java_io_FileDescriptor.h" 33 34 /*******************************************************************/ 35 /* BEGIN JNI ********* BEGIN JNI *********** BEGIN JNI ************/ 36 /*******************************************************************/ 37 38 /* field id for jint 'fd' in java.io.FileDescriptor */ 39 jfieldID IO_fd_fdID; 40 41 /* field id for jboolean 'append' in java.io.FileDescriptor */ 42 jfieldID IO_append_fdID; 43 44 /************************************************************** 45 * static methods to store field ID's in initializers 46 */ 47 48 JNIEXPORT void JNICALL 49 Java_java_io_FileDescriptor_initIDs(JNIEnv *env, jclass fdClass) { 50 IO_fd_fdID = (*env)->GetFieldID(env, fdClass, "fd", "I"); 51 IO_append_fdID = (*env)->GetFieldID(env, fdClass, "append", "Z"); 52 } 53 54 /************************************************************** 55 * File Descriptor 56 */ 57 58 JNIEXPORT void JNICALL 59 Java_java_io_FileDescriptor_sync(JNIEnv *env, jobject this) { 60 FD fd = THIS_FD(this); 61 if (IO_Sync(fd) == -1) { 62 JNU_ThrowByName(env, "java/io/SyncFailedException", "sync failed"); 63 } 64 } 65 66 JNIEXPORT jboolean JNICALL 67 Java_java_io_FileDescriptor_getAppend(JNIEnv *env, jclass fdClass, jint fd) { 68 int flags = fcntl(fd, F_GETFL); 69 return ((flags & O_APPEND) == 0) ? JNI_FALSE : JNI_TRUE; 70 }