| /* |
| * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved. |
| * Copyright 2013 SAP AG. 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 <stdlib.h> |
| #include <errno.h> |
| #include <sys/types.h> |
| #include <sys/mntctl.h> |
| |
| #include "jni.h" |
| #include "jni_util.h" |
| |
| #include "sun_nio_fs_AixNativeDispatcher.h" |
| |
| static jfieldID entry_name; |
| static jfieldID entry_dir; |
| static jfieldID entry_fstype; |
| static jfieldID entry_options; |
| |
| static jclass entry_cls; |
| |
| /** |
| * Call this to throw an internal UnixException when a system/library |
| * call fails |
| */ |
| 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); |
| } |
| } |
| |
| /** |
| * Initialization |
| */ |
| JNIEXPORT void JNICALL |
| Java_sun_nio_fs_AixNativeDispatcher_init(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); |
| entry_cls = (*env)->NewGlobalRef(env, clazz); |
| if (entry_cls == NULL) { |
| JNU_ThrowOutOfMemoryError(env, NULL); |
| return; |
| } |
| } |
| |
| /** |
| * Special implementation of getextmntent (see SolarisNativeDispatcher.c) |
| * that returns all entries at once. |
| */ |
| JNIEXPORT jobjectArray JNICALL |
| Java_sun_nio_fs_AixNativeDispatcher_getmntctl(JNIEnv* env, jclass this) |
| { |
| int must_free_buf = 0; |
| char stack_buf[1024]; |
| char* buffer = stack_buf; |
| size_t buffer_size = 1024; |
| int num_entries; |
| int i; |
| jobjectArray ret; |
| struct vmount * vm; |
| |
| for (i = 0; i < 5; i++) { |
| num_entries = mntctl(MCTL_QUERY, buffer_size, buffer); |
| if (num_entries != 0) { |
| break; |
| } |
| if (must_free_buf) { |
| free(buffer); |
| } |
| buffer_size *= 8; |
| buffer = malloc(buffer_size); |
| must_free_buf = 1; |
| } |
| /* Treat zero entries like errors. */ |
| if (num_entries <= 0) { |
| if (must_free_buf) { |
| free(buffer); |
| } |
| throwUnixException(env, errno); |
| return NULL; |
| } |
| ret = (*env)->NewObjectArray(env, num_entries, entry_cls, NULL); |
| if (ret == NULL) { |
| if (must_free_buf) { |
| free(buffer); |
| } |
| return NULL; |
| } |
| vm = (struct vmount*)buffer; |
| for (i = 0; i < num_entries; i++) { |
| jsize len; |
| jbyteArray bytes; |
| const char* fstype; |
| /* We set all relevant attributes so there is no need to call constructor. */ |
| jobject entry = (*env)->AllocObject(env, entry_cls); |
| if (entry == NULL) { |
| if (must_free_buf) { |
| free(buffer); |
| } |
| return NULL; |
| } |
| (*env)->SetObjectArrayElement(env, ret, i, entry); |
| |
| /* vm->vmt_data[...].vmt_size is 32 bit aligned and also includes NULL byte. */ |
| /* Since we only need the characters, it is necessary to check string size manually. */ |
| len = strlen((char*)vm + vm->vmt_data[VMT_OBJECT].vmt_off); |
| bytes = (*env)->NewByteArray(env, len); |
| if (bytes == NULL) { |
| if (must_free_buf) { |
| free(buffer); |
| } |
| return NULL; |
| } |
| (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)((char *)vm + vm->vmt_data[VMT_OBJECT].vmt_off)); |
| (*env)->SetObjectField(env, entry, entry_name, bytes); |
| |
| len = strlen((char*)vm + vm->vmt_data[VMT_STUB].vmt_off); |
| bytes = (*env)->NewByteArray(env, len); |
| if (bytes == NULL) { |
| if (must_free_buf) { |
| free(buffer); |
| } |
| return NULL; |
| } |
| (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)((char *)vm + vm->vmt_data[VMT_STUB].vmt_off)); |
| (*env)->SetObjectField(env, entry, entry_dir, bytes); |
| |
| switch (vm->vmt_gfstype) { |
| case MNT_J2: |
| fstype = "jfs2"; |
| break; |
| case MNT_NAMEFS: |
| fstype = "namefs"; |
| break; |
| case MNT_NFS: |
| fstype = "nfs"; |
| break; |
| case MNT_JFS: |
| fstype = "jfs"; |
| break; |
| case MNT_CDROM: |
| fstype = "cdrom"; |
| break; |
| case MNT_PROCFS: |
| fstype = "procfs"; |
| break; |
| case MNT_NFS3: |
| fstype = "nfs3"; |
| break; |
| case MNT_AUTOFS: |
| fstype = "autofs"; |
| break; |
| case MNT_UDF: |
| fstype = "udfs"; |
| break; |
| case MNT_NFS4: |
| fstype = "nfs4"; |
| break; |
| case MNT_CIFS: |
| fstype = "smbfs"; |
| break; |
| default: |
| fstype = "unknown"; |
| } |
| len = strlen(fstype); |
| bytes = (*env)->NewByteArray(env, len); |
| if (bytes == NULL) { |
| if (must_free_buf) { |
| free(buffer); |
| } |
| return NULL; |
| } |
| (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)fstype); |
| (*env)->SetObjectField(env, entry, entry_fstype, bytes); |
| |
| len = strlen((char*)vm + vm->vmt_data[VMT_ARGS].vmt_off); |
| bytes = (*env)->NewByteArray(env, len); |
| if (bytes == NULL) { |
| if (must_free_buf) { |
| free(buffer); |
| } |
| return NULL; |
| } |
| (*env)->SetByteArrayRegion(env, bytes, 0, len, (jbyte*)((char *)vm + vm->vmt_data[VMT_ARGS].vmt_off)); |
| (*env)->SetObjectField(env, entry, entry_options, bytes); |
| |
| /* goto the next vmount structure: */ |
| vm = (struct vmount *)((char *)vm + vm->vmt_length); |
| } |
| |
| if (must_free_buf) { |
| free(buffer); |
| } |
| return ret; |
| } |