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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include <jni.h>
     18 #include <stdio.h>
     19 #include <sys/types.h>
     20 #include <sys/stat.h>
     21 #include <grp.h>
     22 #include <pwd.h>
     23 
     24 static jclass gFileStatusClass;
     25 static jfieldID gFileStatusDevFieldID;
     26 static jfieldID gFileStatusInoFieldID;
     27 static jfieldID gFileStatusModeFieldID;
     28 static jfieldID gFileStatusNlinkFieldID;
     29 static jfieldID gFileStatusUidFieldID;
     30 static jfieldID gFileStatusGidFieldID;
     31 static jfieldID gFileStatusSizeFieldID;
     32 static jfieldID gFileStatusBlksizeFieldID;
     33 static jfieldID gFileStatusBlocksFieldID;
     34 static jfieldID gFileStatusAtimeFieldID;
     35 static jfieldID gFileStatusMtimeFieldID;
     36 static jfieldID gFileStatusCtimeFieldID;
     37 
     38 /* Copied from hidden API: frameworks/base/core/jni/android_os_FileUtils.cpp */
     39 jboolean com_android_cts_verifier_os_FileUtils_getFileStatus(JNIEnv* env, jobject thiz,
     40         jstring path, jobject fileStatus, jboolean statLinks)
     41 {
     42     const char* pathStr = env->GetStringUTFChars(path, NULL);
     43     jboolean ret = false;
     44     struct stat s;
     45 
     46     int res = statLinks == true ? lstat(pathStr, &s) : stat(pathStr, &s);
     47 
     48     if (res == 0) {
     49         ret = true;
     50         if (fileStatus != NULL) {
     51             env->SetIntField(fileStatus, gFileStatusDevFieldID, s.st_dev);
     52             env->SetIntField(fileStatus, gFileStatusInoFieldID, s.st_ino);
     53             env->SetIntField(fileStatus, gFileStatusModeFieldID, s.st_mode);
     54             env->SetIntField(fileStatus, gFileStatusNlinkFieldID, s.st_nlink);
     55             env->SetIntField(fileStatus, gFileStatusUidFieldID, s.st_uid);
     56             env->SetIntField(fileStatus, gFileStatusGidFieldID, s.st_gid);
     57             env->SetLongField(fileStatus, gFileStatusSizeFieldID, s.st_size);
     58             env->SetIntField(fileStatus, gFileStatusBlksizeFieldID, s.st_blksize);
     59             env->SetLongField(fileStatus, gFileStatusBlocksFieldID, s.st_blocks);
     60             env->SetLongField(fileStatus, gFileStatusAtimeFieldID, s.st_atime);
     61             env->SetLongField(fileStatus, gFileStatusMtimeFieldID, s.st_mtime);
     62             env->SetLongField(fileStatus, gFileStatusCtimeFieldID, s.st_ctime);
     63         }
     64     }
     65 
     66     env->ReleaseStringUTFChars(path, pathStr);
     67 
     68     return ret;
     69 }
     70 
     71 jstring com_android_cts_verifier_os_FileUtils_getUserName(JNIEnv* env, jobject thiz,
     72         jint uid)
     73 {
     74     struct passwd *pwd = getpwuid(uid);
     75     return env->NewStringUTF(pwd->pw_name);
     76 }
     77 
     78 jstring com_android_cts_verifier_os_FileUtils_getGroupName(JNIEnv* env, jobject thiz,
     79         jint gid)
     80 {
     81     struct group *grp = getgrgid(gid);
     82     return env->NewStringUTF(grp->gr_name);
     83 }
     84 
     85 static JNINativeMethod gMethods[] = {
     86     {  "getFileStatus", "(Ljava/lang/String;Lcom/android/cts/verifier/os/FileUtils$FileStatus;Z)Z",
     87             (void *) com_android_cts_verifier_os_FileUtils_getFileStatus  },
     88     {  "getUserName", "(I)Ljava/lang/String;",
     89             (void *) com_android_cts_verifier_os_FileUtils_getUserName  },
     90     {  "getGroupName", "(I)Ljava/lang/String;",
     91             (void *) com_android_cts_verifier_os_FileUtils_getGroupName  },
     92 };
     93 
     94 int register_com_android_cts_verifier_os_FileUtils(JNIEnv* env)
     95 {
     96     jclass clazz = env->FindClass("com/android/cts/verifier/os/FileUtils");
     97 
     98     gFileStatusClass = env->FindClass("com/android/cts/verifier/os/FileUtils$FileStatus");
     99     gFileStatusDevFieldID = env->GetFieldID(gFileStatusClass, "dev", "I");
    100     gFileStatusInoFieldID = env->GetFieldID(gFileStatusClass, "ino", "I");
    101     gFileStatusModeFieldID = env->GetFieldID(gFileStatusClass, "mode", "I");
    102     gFileStatusNlinkFieldID = env->GetFieldID(gFileStatusClass, "nlink", "I");
    103     gFileStatusUidFieldID = env->GetFieldID(gFileStatusClass, "uid", "I");
    104     gFileStatusGidFieldID = env->GetFieldID(gFileStatusClass, "gid", "I");
    105     gFileStatusSizeFieldID = env->GetFieldID(gFileStatusClass, "size", "J");
    106     gFileStatusBlksizeFieldID = env->GetFieldID(gFileStatusClass, "blksize", "I");
    107     gFileStatusBlocksFieldID = env->GetFieldID(gFileStatusClass, "blocks", "J");
    108     gFileStatusAtimeFieldID = env->GetFieldID(gFileStatusClass, "atime", "J");
    109     gFileStatusMtimeFieldID = env->GetFieldID(gFileStatusClass, "mtime", "J");
    110     gFileStatusCtimeFieldID = env->GetFieldID(gFileStatusClass, "ctime", "J");
    111 
    112     return env->RegisterNatives(clazz, gMethods,
    113             sizeof(gMethods) / sizeof(JNINativeMethod));
    114 }
    115