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