| /* |
| * Copyright 2000-2002 Sun Microsystems, Inc. All Rights Reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| #include "jni.h" |
| #include "jni_util.h" |
| #include "jvm.h" |
| #include "jlong.h" |
| #include "sun_nio_ch_FileDispatcher.h" |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <fcntl.h> |
| #include <sys/uio.h> |
| #include "nio_util.h" |
| |
| |
| static int preCloseFD = -1; /* File descriptor to which we dup other fd's |
| before closing them for real */ |
| |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_FileDispatcher_init(JNIEnv *env, jclass cl) |
| { |
| int sp[2]; |
| if (socketpair(PF_UNIX, SOCK_STREAM, 0, sp) < 0) { |
| JNU_ThrowIOExceptionWithLastError(env, "socketpair failed"); |
| return; |
| } |
| preCloseFD = sp[0]; |
| close(sp[1]); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcher_read0(JNIEnv *env, jclass clazz, |
| jobject fdo, jlong address, jint len) |
| { |
| jint fd = fdval(env, fdo); |
| void *buf = (void *)jlong_to_ptr(address); |
| |
| return convertReturnVal(env, read(fd, buf, len), JNI_TRUE); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcher_pread0(JNIEnv *env, jclass clazz, jobject fdo, |
| jlong address, jint len, jlong offset) |
| { |
| jint fd = fdval(env, fdo); |
| void *buf = (void *)jlong_to_ptr(address); |
| |
| return convertReturnVal(env, pread64(fd, buf, len, offset), JNI_TRUE); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_sun_nio_ch_FileDispatcher_readv0(JNIEnv *env, jclass clazz, |
| jobject fdo, jlong address, jint len) |
| { |
| jint fd = fdval(env, fdo); |
| struct iovec *iov = (struct iovec *)jlong_to_ptr(address); |
| if (len > 16) { |
| len = 16; |
| } |
| return convertLongReturnVal(env, readv(fd, iov, len), JNI_TRUE); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcher_write0(JNIEnv *env, jclass clazz, |
| jobject fdo, jlong address, jint len) |
| { |
| jint fd = fdval(env, fdo); |
| void *buf = (void *)jlong_to_ptr(address); |
| |
| return convertReturnVal(env, write(fd, buf, len), JNI_FALSE); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcher_pwrite0(JNIEnv *env, jclass clazz, jobject fdo, |
| jlong address, jint len, jlong offset) |
| { |
| jint fd = fdval(env, fdo); |
| void *buf = (void *)jlong_to_ptr(address); |
| |
| return convertReturnVal(env, pwrite64(fd, buf, len, offset), JNI_FALSE); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_sun_nio_ch_FileDispatcher_writev0(JNIEnv *env, jclass clazz, |
| jobject fdo, jlong address, jint len) |
| { |
| jint fd = fdval(env, fdo); |
| struct iovec *iov = (struct iovec *)jlong_to_ptr(address); |
| if (len > 16) { |
| len = 16; |
| } |
| return convertLongReturnVal(env, writev(fd, iov, len), JNI_FALSE); |
| } |
| |
| static void closeFileDescriptor(JNIEnv *env, int fd) { |
| if (fd != -1) { |
| int result = close(fd); |
| if (result < 0) |
| JNU_ThrowIOExceptionWithLastError(env, "Close failed"); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_FileDispatcher_close0(JNIEnv *env, jclass clazz, jobject fdo) |
| { |
| jint fd = fdval(env, fdo); |
| closeFileDescriptor(env, fd); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_FileDispatcher_preClose0(JNIEnv *env, jclass clazz, jobject fdo) |
| { |
| jint fd = fdval(env, fdo); |
| if (preCloseFD >= 0) { |
| if (dup2(preCloseFD, fd) < 0) |
| JNU_ThrowIOExceptionWithLastError(env, "dup2 failed"); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_FileDispatcher_closeIntFD(JNIEnv *env, jclass clazz, jint fd) |
| { |
| closeFileDescriptor(env, fd); |
| } |