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 jfieldID gFileStatusDevFieldID;
25 static jfieldID gFileStatusInoFieldID;
26 static jfieldID gFileStatusModeFieldID;
27 static jfieldID gFileStatusNlinkFieldID;
28 static jfieldID gFileStatusUidFieldID;
29 static jfieldID gFileStatusGidFieldID;
30 static jfieldID gFileStatusSizeFieldID;
31 static jfieldID gFileStatusBlksizeFieldID;
32 static jfieldID gFileStatusBlocksFieldID;
33 static jfieldID gFileStatusAtimeFieldID;
34 static jfieldID gFileStatusMtimeFieldID;
35 static jfieldID gFileStatusCtimeFieldID;
36
37 /* Copied from hidden API: frameworks/base/core/jni/android_os_FileUtils.cpp */
com_android_cts_verifier_os_FileUtils_getFileStatus(JNIEnv * env,jobject thiz,jstring path,jobject fileStatus,jboolean statLinks)38 jboolean com_android_cts_verifier_os_FileUtils_getFileStatus(JNIEnv* env, jobject thiz,
39 jstring path, jobject fileStatus, jboolean statLinks)
40 {
41 const char* pathStr = env->GetStringUTFChars(path, NULL);
42 jboolean ret = false;
43 struct stat s;
44
45 int res = statLinks == true ? lstat(pathStr, &s) : stat(pathStr, &s);
46
47 if (res == 0) {
48 ret = true;
49 if (fileStatus != NULL) {
50 env->SetIntField(fileStatus, gFileStatusDevFieldID, s.st_dev);
51 env->SetIntField(fileStatus, gFileStatusInoFieldID, s.st_ino);
52 env->SetIntField(fileStatus, gFileStatusModeFieldID, s.st_mode);
53 env->SetIntField(fileStatus, gFileStatusNlinkFieldID, s.st_nlink);
54 env->SetIntField(fileStatus, gFileStatusUidFieldID, s.st_uid);
55 env->SetIntField(fileStatus, gFileStatusGidFieldID, s.st_gid);
56 env->SetLongField(fileStatus, gFileStatusSizeFieldID, s.st_size);
57 env->SetIntField(fileStatus, gFileStatusBlksizeFieldID, s.st_blksize);
58 env->SetLongField(fileStatus, gFileStatusBlocksFieldID, s.st_blocks);
59 env->SetLongField(fileStatus, gFileStatusAtimeFieldID, s.st_atime);
60 env->SetLongField(fileStatus, gFileStatusMtimeFieldID, s.st_mtime);
61 env->SetLongField(fileStatus, gFileStatusCtimeFieldID, s.st_ctime);
62 }
63 }
64
65 env->ReleaseStringUTFChars(path, pathStr);
66
67 return ret;
68 }
69
com_android_cts_verifier_os_FileUtils_getUserName(JNIEnv * env,jobject thiz,jint uid)70 jstring com_android_cts_verifier_os_FileUtils_getUserName(JNIEnv* env, jobject thiz,
71 jint uid)
72 {
73 struct passwd *pwd = getpwuid(uid);
74 return env->NewStringUTF(pwd->pw_name);
75 }
76
com_android_cts_verifier_os_FileUtils_getGroupName(JNIEnv * env,jobject thiz,jint gid)77 jstring com_android_cts_verifier_os_FileUtils_getGroupName(JNIEnv* env, jobject thiz,
78 jint gid)
79 {
80 struct group *grp = getgrgid(gid);
81 return env->NewStringUTF(grp->gr_name);
82 }
83
84 static JNINativeMethod gMethods[] = {
85 { "getFileStatus", "(Ljava/lang/String;Lcom/android/cts/verifier/os/FileUtils$FileStatus;Z)Z",
86 (void *) com_android_cts_verifier_os_FileUtils_getFileStatus },
87 { "getUserName", "(I)Ljava/lang/String;",
88 (void *) com_android_cts_verifier_os_FileUtils_getUserName },
89 { "getGroupName", "(I)Ljava/lang/String;",
90 (void *) com_android_cts_verifier_os_FileUtils_getGroupName },
91 };
92
register_com_android_cts_verifier_os_FileUtils(JNIEnv * env)93 int register_com_android_cts_verifier_os_FileUtils(JNIEnv* env)
94 {
95 jclass clazz = env->FindClass("com/android/cts/verifier/os/FileUtils");
96
97 jclass fileStatusClass = env->FindClass("com/android/cts/verifier/os/FileUtils$FileStatus");
98 gFileStatusDevFieldID = env->GetFieldID(fileStatusClass, "dev", "I");
99 gFileStatusInoFieldID = env->GetFieldID(fileStatusClass, "ino", "I");
100 gFileStatusModeFieldID = env->GetFieldID(fileStatusClass, "mode", "I");
101 gFileStatusNlinkFieldID = env->GetFieldID(fileStatusClass, "nlink", "I");
102 gFileStatusUidFieldID = env->GetFieldID(fileStatusClass, "uid", "I");
103 gFileStatusGidFieldID = env->GetFieldID(fileStatusClass, "gid", "I");
104 gFileStatusSizeFieldID = env->GetFieldID(fileStatusClass, "size", "J");
105 gFileStatusBlksizeFieldID = env->GetFieldID(fileStatusClass, "blksize", "I");
106 gFileStatusBlocksFieldID = env->GetFieldID(fileStatusClass, "blocks", "J");
107 gFileStatusAtimeFieldID = env->GetFieldID(fileStatusClass, "atime", "J");
108 gFileStatusMtimeFieldID = env->GetFieldID(fileStatusClass, "mtime", "J");
109 gFileStatusCtimeFieldID = env->GetFieldID(fileStatusClass, "ctime", "J");
110
111 return env->RegisterNatives(clazz, gMethods,
112 sizeof(gMethods) / sizeof(JNINativeMethod));
113 }
114