1 /*
2 * Copyright (c) 2005, 2008, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 #include "jni.h"
27 #include "jni_util.h"
28 #include "jvm.h"
29 #include "nio.h"
30 #include "nio_util.h"
31 #include "JNIHelp.h"
32
33 #define NATIVE_METHOD(className, functionName, signature) \
34 { #functionName, signature, (void*)(className ## _ ## functionName) }
35
36 #ifdef _ALLBSD_SOURCE
37 #define stat64 stat
38
39 #define fstat64 fstat
40 #endif
41
42 static jfieldID key_st_dev; /* id for FileKey.st_dev */
43 static jfieldID key_st_ino; /* id for FileKey.st_ino */
44
45
FileKey_initIDs(JNIEnv * env)46 static void FileKey_initIDs(JNIEnv *env)
47 {
48 jclass clazz = (*env)->FindClass(env, "sun/nio/ch/FileKey");
49 key_st_dev = (*env)->GetFieldID(env, clazz, "st_dev", "J");
50 key_st_ino = (*env)->GetFieldID(env, clazz, "st_ino", "J");
51 }
52
53
54 JNIEXPORT void JNICALL
FileKey_init(JNIEnv * env,jobject this,jobject fdo)55 FileKey_init(JNIEnv *env, jobject this, jobject fdo)
56 {
57 struct stat64 fbuf;
58 int res;
59
60 RESTARTABLE(fstat64(fdval(env, fdo), &fbuf), res);
61 if (res < 0) {
62 JNU_ThrowIOExceptionWithLastError(env, "fstat64 failed");
63 } else {
64 (*env)->SetLongField(env, this, key_st_dev, (jlong)fbuf.st_dev);
65 (*env)->SetLongField(env, this, key_st_ino, (jlong)fbuf.st_ino);
66 }
67 }
68
69 static JNINativeMethod gMethods[] = {
70 NATIVE_METHOD(FileKey, init, "(Ljava/io/FileDescriptor;)V"),
71 };
72
register_sun_nio_ch_FileKey(JNIEnv * env)73 void register_sun_nio_ch_FileKey(JNIEnv* env) {
74 jniRegisterNativeMethods(env, "sun/nio/ch/FileKey", gMethods, NELEM(gMethods));
75 FileKey_initIDs(env);
76 }
77