1 /*
2 * Copyright (C) 2011 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 <grp.h>
18 #include <jni.h>
19 #include <pwd.h>
20 #include <stdio.h>
21 #include <string.h>
22 #include <sys/errno.h>
23 #include <sys/types.h>
24 #include <sys/stat.h>
25 #include <assert.h>
26
27 static jclass gFileStatusClass;
28 static jfieldID gFileStatusDevFieldID;
29 static jfieldID gFileStatusInoFieldID;
30 static jfieldID gFileStatusModeFieldID;
31 static jfieldID gFileStatusNlinkFieldID;
32 static jfieldID gFileStatusUidFieldID;
33 static jfieldID gFileStatusGidFieldID;
34 static jfieldID gFileStatusSizeFieldID;
35 static jfieldID gFileStatusBlksizeFieldID;
36 static jfieldID gFileStatusBlocksFieldID;
37 static jfieldID gFileStatusAtimeFieldID;
38 static jfieldID gFileStatusMtimeFieldID;
39 static jfieldID gFileStatusCtimeFieldID;
40
41 /*
42 * Native methods used by
43 * cts/common/device-side/util/src/com/android/compatibility/common/util/FileUtils.java
44 *
45 * Copied from hidden API: frameworks/base/core/jni/android_FileUtils.cpp
46 */
47
android_cts_FileUtils_getFileStatus(JNIEnv * env,jobject thiz,jstring path,jobject fileStatus,jboolean statLinks)48 jboolean android_cts_FileUtils_getFileStatus(JNIEnv* env, jobject thiz,
49 jstring path, jobject fileStatus, jboolean statLinks)
50 {
51 const char* pathStr = env->GetStringUTFChars(path, NULL);
52 jboolean ret = false;
53 struct stat s;
54
55 int res = statLinks == true ? lstat(pathStr, &s) : stat(pathStr, &s);
56
57 if (res == 0) {
58 ret = true;
59 if (fileStatus != NULL) {
60 env->SetIntField(fileStatus, gFileStatusDevFieldID, s.st_dev);
61 env->SetIntField(fileStatus, gFileStatusInoFieldID, s.st_ino);
62 env->SetIntField(fileStatus, gFileStatusModeFieldID, s.st_mode);
63 env->SetIntField(fileStatus, gFileStatusNlinkFieldID, s.st_nlink);
64 env->SetIntField(fileStatus, gFileStatusUidFieldID, s.st_uid);
65 env->SetIntField(fileStatus, gFileStatusGidFieldID, s.st_gid);
66 env->SetLongField(fileStatus, gFileStatusSizeFieldID, s.st_size);
67 env->SetIntField(fileStatus, gFileStatusBlksizeFieldID, s.st_blksize);
68 env->SetLongField(fileStatus, gFileStatusBlocksFieldID, s.st_blocks);
69 env->SetLongField(fileStatus, gFileStatusAtimeFieldID, s.st_atime);
70 env->SetLongField(fileStatus, gFileStatusMtimeFieldID, s.st_mtime);
71 env->SetLongField(fileStatus, gFileStatusCtimeFieldID, s.st_ctime);
72 }
73 }
74
75 env->ReleaseStringUTFChars(path, pathStr);
76
77 return ret;
78 }
79
android_cts_FileUtils_getUserName(JNIEnv * env,jobject thiz,jint uid)80 jstring android_cts_FileUtils_getUserName(JNIEnv* env, jobject thiz,
81 jint uid)
82 {
83 struct passwd *pwd = getpwuid(uid);
84 return env->NewStringUTF(pwd->pw_name);
85 }
86
android_cts_FileUtils_getGroupName(JNIEnv * env,jobject thiz,jint gid)87 jstring android_cts_FileUtils_getGroupName(JNIEnv* env, jobject thiz,
88 jint gid)
89 {
90 struct group *grp = getgrgid(gid);
91 return env->NewStringUTF(grp->gr_name);
92 }
93
android_cts_FileUtils_setPermissions(JNIEnv * env,jobject clazz,jstring file,jint mode)94 jint android_cts_FileUtils_setPermissions(JNIEnv* env, jobject clazz,
95 jstring file, jint mode)
96 {
97 const char *fileStr = env->GetStringUTFChars(file, NULL);
98 if (fileStr == NULL) {
99 return -1;
100 }
101
102 if (strlen(fileStr) <= 0) {
103 env->ReleaseStringUTFChars(file, fileStr);
104 return ENOENT;
105 }
106
107 jint returnValue = chmod(fileStr, mode) == 0 ? 0 : errno;
108 env->ReleaseStringUTFChars(file, fileStr);
109 return returnValue;
110 }
111
112 static JNINativeMethod gMethods[] = {
113 { "getFileStatus",
114 "(Ljava/lang/String;Lcom/android/compatibility/common/util/FileUtils$FileStatus;Z)Z",
115 (void *) android_cts_FileUtils_getFileStatus },
116 { "getUserName", "(I)Ljava/lang/String;",
117 (void *) android_cts_FileUtils_getUserName },
118 { "getGroupName", "(I)Ljava/lang/String;",
119 (void *) android_cts_FileUtils_getGroupName },
120 { "setPermissions", "(Ljava/lang/String;I)I",
121 (void *) android_cts_FileUtils_setPermissions },
122 };
123
register_android_cts_FileUtils(JNIEnv * env)124 int register_android_cts_FileUtils(JNIEnv* env)
125 {
126 jclass clazz = env->FindClass("com/android/compatibility/common/util/FileUtils");
127 assert(clazz != null);
128
129 gFileStatusClass = env->FindClass(
130 "com/android/compatibility/common/util/FileUtils$FileStatus");
131 assert(gFileStatusClass != null);
132 gFileStatusDevFieldID = env->GetFieldID(gFileStatusClass, "dev", "I");
133 gFileStatusInoFieldID = env->GetFieldID(gFileStatusClass, "ino", "I");
134 gFileStatusModeFieldID = env->GetFieldID(gFileStatusClass, "mode", "I");
135 gFileStatusNlinkFieldID = env->GetFieldID(gFileStatusClass, "nlink", "I");
136 gFileStatusUidFieldID = env->GetFieldID(gFileStatusClass, "uid", "I");
137 gFileStatusGidFieldID = env->GetFieldID(gFileStatusClass, "gid", "I");
138 gFileStatusSizeFieldID = env->GetFieldID(gFileStatusClass, "size", "J");
139 gFileStatusBlksizeFieldID = env->GetFieldID(gFileStatusClass, "blksize", "I");
140 gFileStatusBlocksFieldID = env->GetFieldID(gFileStatusClass, "blocks", "J");
141 gFileStatusAtimeFieldID = env->GetFieldID(gFileStatusClass, "atime", "J");
142 gFileStatusMtimeFieldID = env->GetFieldID(gFileStatusClass, "mtime", "J");
143 gFileStatusCtimeFieldID = env->GetFieldID(gFileStatusClass, "ctime", "J");
144
145 return env->RegisterNatives(clazz, gMethods,
146 sizeof(gMethods) / sizeof(JNINativeMethod));
147 }
148