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
27static jclass gFileStatusClass;
28static jfieldID gFileStatusDevFieldID;
29static jfieldID gFileStatusInoFieldID;
30static jfieldID gFileStatusModeFieldID;
31static jfieldID gFileStatusNlinkFieldID;
32static jfieldID gFileStatusUidFieldID;
33static jfieldID gFileStatusGidFieldID;
34static jfieldID gFileStatusSizeFieldID;
35static jfieldID gFileStatusBlksizeFieldID;
36static jfieldID gFileStatusBlocksFieldID;
37static jfieldID gFileStatusAtimeFieldID;
38static jfieldID gFileStatusMtimeFieldID;
39static 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
48jboolean 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
80jstring 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
87jstring 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
94jint 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
112static JNINativeMethod gMethods[] = {
113    {  "getFileStatus",
114            "(Ljava/lang/String;Lcom/android/compatibility/common/util/FileUtils$FileStatus;Z)Z",
115            (void *) android_cts_FileUtils_getFileStatus  },
116    {  "getUserName", "(I)Ljava/lang/String;",
117            (void *) android_cts_FileUtils_getUserName  },
118    {  "getGroupName", "(I)Ljava/lang/String;",
119            (void *) android_cts_FileUtils_getGroupName  },
120    {  "setPermissions", "(Ljava/lang/String;I)I",
121            (void *) android_cts_FileUtils_setPermissions },
122};
123
124int register_android_cts_FileUtils(JNIEnv* env)
125{
126    jclass clazz = env->FindClass("com/android/compatibility/common/util/FileUtils");
127    assert(clazz != null);
128
129    gFileStatusClass = env->FindClass(
130            "com/android/compatibility/common/util/FileUtils$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