| /* |
| * 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 <sys/param.h> |
| #include <sys/mount.h> |
| #ifdef ST_RDONLY |
| #define statfs statvfs |
| #define getfsstat getvfsstat |
| #define f_flags f_flag |
| #define ISREADONLY ST_RDONLY |
| #else |
| #define ISREADONLY MNT_RDONLY |
| #endif |
| |
| #include <stdlib.h> |
| #include <string.h> |
| |
| static jfieldID entry_name; |
| static jfieldID entry_dir; |
| static jfieldID entry_fstype; |
| static jfieldID entry_options; |
| |
| struct fsstat_iter { |
| struct statfs *buf; |
| int pos; |
| int nentries; |
| }; |
| |
| #include "sun_nio_fs_BsdNativeDispatcher.h" |
| |
| 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); |
| } |
| } |
| |
| /** |
| * Initialize jfieldIDs |
| */ |
| JNIEXPORT void JNICALL |
| Java_sun_nio_fs_BsdNativeDispatcher_initIDs(JNIEnv* env, jclass this) |
| { |
| jclass clazz; |
| |
| 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 jlong JNICALL |
| Java_sun_nio_fs_BsdNativeDispatcher_getfsstat(JNIEnv* env, jclass this) |
| { |
| int nentries; |
| size_t bufsize; |
| struct fsstat_iter *iter = malloc(sizeof(*iter)); |
| |
| if (iter == NULL) { |
| JNU_ThrowOutOfMemoryError(env, "native heap"); |
| return 0; |
| } |
| |
| iter->pos = 0; |
| iter->nentries = 0; |
| iter->buf = NULL; |
| |
| nentries = getfsstat(NULL, 0, MNT_NOWAIT); |
| |
| if (nentries <= 0) { |
| free(iter); |
| throwUnixException(env, errno); |
| return 0; |
| } |
| |
| // It's possible that a new filesystem gets mounted between |
| // the first getfsstat and the second so loop until consistant |
| |
| while (nentries != iter->nentries) { |
| if (iter->buf != NULL) |
| free(iter->buf); |
| |
| bufsize = nentries * sizeof(struct statfs); |
| iter->nentries = nentries; |
| |
| iter->buf = malloc(bufsize); |
| if (iter->buf == NULL) { |
| free(iter); |
| JNU_ThrowOutOfMemoryError(env, "native heap"); |
| return 0; |
| } |
| |
| nentries = getfsstat(iter->buf, bufsize, MNT_WAIT); |
| if (nentries <= 0) { |
| free(iter->buf); |
| free(iter); |
| throwUnixException(env, errno); |
| return 0; |
| } |
| } |
| |
| return (jlong)iter; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_fs_BsdNativeDispatcher_fsstatEntry(JNIEnv* env, jclass this, |
| jlong value, jobject entry) |
| { |
| struct fsstat_iter *iter = jlong_to_ptr(value); |
| jsize len; |
| jbyteArray bytes; |
| char* name; |
| char* dir; |
| char* fstype; |
| char* options; |
| dev_t dev; |
| |
| if (iter == NULL || iter->pos >= iter->nentries) |
| return -1; |
| |
| name = iter->buf[iter->pos].f_mntfromname; |
| dir = iter->buf[iter->pos].f_mntonname; |
| fstype = iter->buf[iter->pos].f_fstypename; |
| if (iter->buf[iter->pos].f_flags & ISREADONLY) |
| options="ro"; |
| else |
| options=""; |
| |
| iter->pos++; |
| |
| 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_BsdNativeDispatcher_endfsstat(JNIEnv* env, jclass this, jlong value) |
| { |
| struct fsstat_iter *iter = jlong_to_ptr(value); |
| |
| if (iter != NULL) { |
| free(iter->buf); |
| free(iter); |
| } |
| } |