1 /*
   2  * Copyright (c) 2004, 2012, 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 <sys/types.h>
  27 #include <sys/stat.h>
  28 
  29 #include "jni.h"
  30 #include "jni_util.h"
  31 #include "jdk_internal_agent_FileSystemImpl.h"
  32 
  33 #ifdef _ALLBSD_SOURCE
  34 #define stat64 stat
  35 #endif
  36 
  37 /*
  38  * JNI_OnLoad
  39  */
  40 JNIEXPORT jint JNICALL DEF_JNI_OnLoad(JavaVM *vm, void *reserved)
  41 {
  42     JNIEnv* env;
  43 
  44     if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_2) != JNI_OK) {
  45         return JNI_EVERSION; /* JNI version not supported */
  46     }
  47 
  48     return JNI_VERSION_9;
  49 }
  50 
  51 /*
  52  * Class:     jdk_internal_agent_FileSystemImpl
  53  * Method:    isAccessUserOnly0
  54  * Signature: (Ljava/lang/String;)Z
  55  */
  56 JNIEXPORT jboolean JNICALL Java_jdk_internal_agent_FileSystemImpl_isAccessUserOnly0
  57   (JNIEnv *env, jclass ignored, jstring str)
  58 {
  59     jboolean res = JNI_FALSE;
  60     jboolean isCopy;
  61     const char *path = JNU_GetStringPlatformChars(env, str, &isCopy);
  62     if (path != NULL) {
  63         struct stat64 sb;
  64         if (stat64(path, &sb) == 0) {
  65             res = ((sb.st_mode & (S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) == 0) ? JNI_TRUE : JNI_FALSE;
  66         } else {
  67             JNU_ThrowIOExceptionWithLastError(env, "stat64 failed");
  68         }
  69         if (isCopy) {
  70             JNU_ReleaseStringPlatformChars(env, str, path);
  71         }
  72     }
  73     return res;
  74 }