| /* |
| * Copyright (c) 2008, 2012, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "jni.h" |
| #include "jni_util.h" |
| #include "jvm.h" |
| #include "jlong.h" |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <dlfcn.h> |
| #include <errno.h> |
| #include <mntent.h> |
| |
| #include "sun_nio_fs_LinuxNativeDispatcher.h" |
| |
| typedef size_t fgetxattr_func(int fd, const char* name, void* value, size_t size); |
| typedef int fsetxattr_func(int fd, const char* name, void* value, size_t size, int flags); |
| typedef int fremovexattr_func(int fd, const char* name); |
| typedef int flistxattr_func(int fd, char* list, size_t size); |
| |
| fgetxattr_func* my_fgetxattr_func = NULL; |
| fsetxattr_func* my_fsetxattr_func = NULL; |
| fremovexattr_func* my_fremovexattr_func = NULL; |
| flistxattr_func* my_flistxattr_func = NULL; |
| |
| static jfieldID entry_name; |
| static jfieldID entry_dir; |
| static jfieldID entry_fstype; |
| static jfieldID entry_options; |
| |
| static void throwUnixException(JNIEnv* env, int errnum) { |
| jobject x = JNU_NewObjectByName(env, "sun/nio/fs/UnixException", |
| "(I)V", errnum); |
| if (x != NULL) { |
| (*env)->Throw(env, x); |
| } |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_fs_LinuxNativeDispatcher_init(JNIEnv *env, jclass clazz) |
| { |
| my_fgetxattr_func = (fgetxattr_func*)dlsym(RTLD_DEFAULT, "fgetxattr"); |
| my_fsetxattr_func = (fsetxattr_func*)dlsym(RTLD_DEFAULT, "fsetxattr"); |
| my_fremovexattr_func = (fremovexattr_func*)dlsym(RTLD_DEFAULT, "fremovexattr"); |
| my_flistxattr_func = (flistxattr_func*)dlsym(RTLD_DEFAULT, "flistxattr"); |
| |
| clazz = (*env)->FindClass(env, "sun/nio/fs/UnixMountEntry"); |
| CHECK_NULL(clazz); |
| entry_name = (*env)->GetFieldID(env, clazz, "name", "[B"); |
| CHECK_NULL(entry_name); |
| entry_dir = (*env)->GetFieldID(env, clazz, "dir", "[B"); |
| CHECK_NULL(entry_dir); |
| entry_fstype = (*env)->GetFieldID(env, clazz, "fstype", "[B"); |
| CHECK_NULL(entry_fstype); |
| entry_options = (*env)->GetFieldID(env, clazz, "opts", "[B"); |
| CHECK_NULL(entry_options); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_fs_LinuxNativeDispatcher_fgetxattr0(JNIEnv* env, jclass clazz, |
| jint fd, jlong nameAddress, jlong valueAddress, jint valueLen) |
| { |
| size_t res = -1; |
| const char* name = jlong_to_ptr(nameAddress); |
| void* value = jlong_to_ptr(valueAddress); |
| |
| if (my_fgetxattr_func == NULL) { |
| errno = ENOTSUP; |
| } else { |
| /* EINTR not documented */ |
| res = (*my_fgetxattr_func)(fd, name, value, valueLen); |
| } |
| if (res == (size_t)-1) |
| throwUnixException(env, errno); |
| return (jint)res; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_fs_LinuxNativeDispatcher_fsetxattr0(JNIEnv* env, jclass clazz, |
| jint fd, jlong nameAddress, jlong valueAddress, jint valueLen) |
| { |
| int res = -1; |
| const char* name = jlong_to_ptr(nameAddress); |
| void* value = jlong_to_ptr(valueAddress); |
| |
| if (my_fsetxattr_func == NULL) { |
| errno = ENOTSUP; |
| } else { |
| /* EINTR not documented */ |
| res = (*my_fsetxattr_func)(fd, name, value, valueLen, 0); |
| } |
| if (res == -1) |
| throwUnixException(env, errno); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_fs_LinuxNativeDispatcher_fremovexattr0(JNIEnv* env, jclass clazz, |
| jint fd, jlong nameAddress) |
| { |
| int res = -1; |
| const char* name = jlong_to_ptr(nameAddress); |
| |
| if (my_fremovexattr_func == NULL) { |
| errno = ENOTSUP; |
| } else { |
| /* EINTR not documented */ |
| res = (*my_fremovexattr_func)(fd, name); |
| } |
| if (res == -1) |
| throwUnixException(env, errno); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_fs_LinuxNativeDispatcher_flistxattr(JNIEnv* env, jclass clazz, |
| jint fd, jlong listAddress, jint size) |
| { |
| size_t res = -1; |
| char* list = jlong_to_ptr(listAddress); |
| |
| if (my_flistxattr_func == NULL) { |
| errno = ENOTSUP; |
| } else { |
| /* EINTR not documented */ |
| res = (*my_flistxattr_func)(fd, list, (size_t)size); |
| } |
| if (res == (size_t)-1) |
| throwUnixException(env, errno); |
| return (jint)res; |
| } |
| |
| JNIEXPORT jlong JNICALL |
| Java_sun_nio_fs_LinuxNativeDispatcher_setmntent0(JNIEnv* env, jclass this, jlong pathAddress, |
| jlong modeAddress) |
| { |
| FILE* fp = NULL; |
| const char* path = (const char*)jlong_to_ptr(pathAddress); |
| const char* mode = (const char*)jlong_to_ptr(modeAddress); |
| |
| do { |
| fp = setmntent(path, mode); |
| } while (fp == NULL && errno == EINTR); |
| if (fp == NULL) { |
| throwUnixException(env, errno); |
| } |
| return ptr_to_jlong(fp); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_fs_LinuxNativeDispatcher_getmntent(JNIEnv* env, jclass this, |
| jlong value, jobject entry) |
| { |
| struct mntent ent; |
| char buf[1024]; |
| int buflen = sizeof(buf); |
| struct mntent* m; |
| FILE* fp = jlong_to_ptr(value); |
| jsize len; |
| jbyteArray bytes; |
| char* name; |
| char* dir; |
| char* fstype; |
| char* options; |
| |
| m = getmntent_r(fp, &ent, (char*)&buf, buflen); |
| if (m == NULL) |
| return -1; |
| name = m->mnt_fsname; |
| dir = m->mnt_dir; |
| fstype = m->mnt_type; |
| options = m->mnt_opts; |
| |
| len = strlen(name); |
| bytes = (*env)->NewByteArray(env, len); |
| if (bytes == NULL) |
| return -1; |
| (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)name); |
| (*env)->SetObjectField(env, entry, entry_name, bytes); |
| |
| len = strlen(dir); |
| bytes = (*env)->NewByteArray(env, len); |
| if (bytes == NULL) |
| return -1; |
| (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)dir); |
| (*env)->SetObjectField(env, entry, entry_dir, bytes); |
| |
| len = strlen(fstype); |
| bytes = (*env)->NewByteArray(env, len); |
| if (bytes == NULL) |
| return -1; |
| (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)fstype); |
| (*env)->SetObjectField(env, entry, entry_fstype, bytes); |
| |
| len = strlen(options); |
| bytes = (*env)->NewByteArray(env, len); |
| if (bytes == NULL) |
| return -1; |
| (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)options); |
| (*env)->SetObjectField(env, entry, entry_options, bytes); |
| |
| return 0; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_fs_LinuxNativeDispatcher_endmntent(JNIEnv* env, jclass this, jlong stream) |
| { |
| FILE* fp = jlong_to_ptr(stream); |
| /* FIXME - man page doesn't explain how errors are returned */ |
| endmntent(fp); |
| } |