| /* |
| * Copyright 2000-2009 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_FileDispatcherImpl.h" |
| #include "java_lang_Long.h" |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <fcntl.h> |
| #include <sys/uio.h> |
| #include "nio.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_FileDispatcherImpl_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_FileDispatcherImpl_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_FileDispatcherImpl_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_FileDispatcherImpl_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_FileDispatcherImpl_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_FileDispatcherImpl_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_FileDispatcherImpl_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 jlong |
| handle(JNIEnv *env, jlong rv, char *msg) |
| { |
| if (rv >= 0) |
| return rv; |
| if (errno == EINTR) |
| return IOS_INTERRUPTED; |
| JNU_ThrowIOExceptionWithLastError(env, msg); |
| return IOS_THROWN; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_force0(JNIEnv *env, jobject this, |
| jobject fdo, jboolean md) |
| { |
| jint fd = fdval(env, fdo); |
| int result = 0; |
| |
| if (md == JNI_FALSE) { |
| result = fdatasync(fd); |
| } else { |
| result = fsync(fd); |
| } |
| return handle(env, result, "Force failed"); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_truncate0(JNIEnv *env, jobject this, |
| jobject fdo, jlong size) |
| { |
| return handle(env, |
| ftruncate64(fdval(env, fdo), size), |
| "Truncation failed"); |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_size0(JNIEnv *env, jobject this, jobject fdo) |
| { |
| struct stat64 fbuf; |
| |
| if (fstat64(fdval(env, fdo), &fbuf) < 0) |
| return handle(env, -1, "Size failed"); |
| return fbuf.st_size; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_lock0(JNIEnv *env, jobject this, jobject fdo, |
| jboolean block, jlong pos, jlong size, |
| jboolean shared) |
| { |
| jint fd = fdval(env, fdo); |
| jint lockResult = 0; |
| int cmd = 0; |
| struct flock64 fl; |
| |
| fl.l_whence = SEEK_SET; |
| if (size == (jlong)java_lang_Long_MAX_VALUE) { |
| fl.l_len = (off64_t)0; |
| } else { |
| fl.l_len = (off64_t)size; |
| } |
| fl.l_start = (off64_t)pos; |
| if (shared == JNI_TRUE) { |
| fl.l_type = F_RDLCK; |
| } else { |
| fl.l_type = F_WRLCK; |
| } |
| if (block == JNI_TRUE) { |
| cmd = F_SETLKW64; |
| } else { |
| cmd = F_SETLK64; |
| } |
| lockResult = fcntl(fd, cmd, &fl); |
| if (lockResult < 0) { |
| if ((cmd == F_SETLK64) && (errno == EAGAIN)) |
| return sun_nio_ch_FileDispatcherImpl_NO_LOCK; |
| if (errno == EINTR) |
| return sun_nio_ch_FileDispatcherImpl_INTERRUPTED; |
| JNU_ThrowIOExceptionWithLastError(env, "Lock failed"); |
| } |
| return 0; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_release0(JNIEnv *env, jobject this, |
| jobject fdo, jlong pos, jlong size) |
| { |
| jint fd = fdval(env, fdo); |
| jint lockResult = 0; |
| struct flock64 fl; |
| int cmd = F_SETLK64; |
| |
| fl.l_whence = SEEK_SET; |
| if (size == (jlong)java_lang_Long_MAX_VALUE) { |
| fl.l_len = (off64_t)0; |
| } else { |
| fl.l_len = (off64_t)size; |
| } |
| fl.l_start = (off64_t)pos; |
| fl.l_type = F_UNLCK; |
| lockResult = fcntl(fd, cmd, &fl); |
| if (lockResult < 0) { |
| JNU_ThrowIOExceptionWithLastError(env, "Release failed"); |
| } |
| } |
| |
| |
| 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_FileDispatcherImpl_close0(JNIEnv *env, jclass clazz, jobject fdo) |
| { |
| jint fd = fdval(env, fdo); |
| closeFileDescriptor(env, fd); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_FileDispatcherImpl_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_FileDispatcherImpl_closeIntFD(JNIEnv *env, jclass clazz, jint fd) |
| { |
| closeFileDescriptor(env, fd); |
| } |