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      1 package android.permission.cts;
      2 
      3 /*
      4  * Copyright (C) 2010 The Android Open Source Project
      5  *
      6  * Licensed under the Apache License, Version 2.0 (the "License");
      7  * you may not use this file except in compliance with the License.
      8  * You may obtain a copy of the License at
      9  *
     10  *      http://www.apache.org/licenses/LICENSE-2.0
     11  *
     12  * Unless required by applicable law or agreed to in writing, software
     13  * distributed under the License is distributed on an "AS IS" BASIS,
     14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     15  * See the License for the specific language governing permissions and
     16  * limitations under the License.
     17  */
     18 
     19 import com.google.common.primitives.Ints;
     20 
     21 import android.system.OsConstants;
     22 
     23 import java.util.HashSet;
     24 import java.util.Set;
     25 
     26 /** Bits and pieces copied from hidden API of android.os.FileUtils. */
     27 public class FileUtils {
     28 
     29     public static final int S_IFMT  = 0170000;
     30     public static final int S_IFSOCK = 0140000;
     31     public static final int S_IFLNK = 0120000;
     32     public static final int S_IFREG = 0100000;
     33     public static final int S_IFBLK = 0060000;
     34     public static final int S_IFDIR = 0040000;
     35     public static final int S_IFCHR = 0020000;
     36     public static final int S_IFIFO = 0010000;
     37 
     38     public static final int S_ISUID = 0004000;
     39     public static final int S_ISGID = 0002000;
     40     public static final int S_ISVTX = 0001000;
     41 
     42     public static final int S_IRWXU = 00700;
     43     public static final int S_IRUSR = 00400;
     44     public static final int S_IWUSR = 00200;
     45     public static final int S_IXUSR = 00100;
     46 
     47     public static final int S_IRWXG = 00070;
     48     public static final int S_IRGRP = 00040;
     49     public static final int S_IWGRP = 00020;
     50     public static final int S_IXGRP = 00010;
     51 
     52     public static final int S_IRWXO = 00007;
     53     public static final int S_IROTH = 00004;
     54     public static final int S_IWOTH = 00002;
     55     public static final int S_IXOTH = 00001;
     56 
     57     static {
     58         System.loadLibrary("ctspermission_jni");
     59     }
     60 
     61     public static class FileStatus {
     62 
     63         public int dev;
     64         public int ino;
     65         public int mode;
     66         public int nlink;
     67         public int uid;
     68         public int gid;
     69         public int rdev;
     70         public long size;
     71         public int blksize;
     72         public long blocks;
     73         public long atime;
     74         public long mtime;
     75         public long ctime;
     76 
     77         public boolean hasModeFlag(int flag) {
     78             if (((S_IRWXU | S_IRWXG | S_IRWXO) & flag) != flag) {
     79                 throw new IllegalArgumentException("Inappropriate flag " + flag);
     80             }
     81             return (mode & flag) == flag;
     82         }
     83 
     84         public boolean isOfType(int type) {
     85             if ((type & S_IFMT) != type) {
     86                 throw new IllegalArgumentException("Unknown type " + type);
     87             }
     88             return (mode & S_IFMT) == type;
     89         }
     90     }
     91 
     92     public static class CapabilitySet {
     93 
     94         private final Set<Integer> mCapabilities = new HashSet<Integer>();
     95 
     96         public CapabilitySet add(int capability) {
     97             if ((capability < 0) || (capability > OsConstants.CAP_LAST_CAP)) {
     98                 throw new IllegalArgumentException(String.format(
     99                         "capability id %d out of valid range", capability));
    100             }
    101             mCapabilities.add(capability);
    102             return this;
    103         }
    104 
    105         private native static boolean fileHasOnly(String path,
    106                 int[] capabilities);
    107 
    108         public boolean fileHasOnly(String path) {
    109             return fileHasOnly(path, Ints.toArray(mCapabilities));
    110         }
    111     }
    112 
    113     /**
    114      * @param path of the file to stat
    115      * @param status object to set the fields on
    116      * @param statLinks or don't stat links (lstat vs stat)
    117      * @return whether or not we were able to stat the file
    118      */
    119     public native static boolean getFileStatus(String path, FileStatus status, boolean statLinks);
    120 
    121     public native static String getUserName(int uid);
    122 
    123     public native static String getGroupName(int gid);
    124 
    125     public native static boolean hasSetUidCapability(String path);
    126 
    127     public native static boolean hasSetGidCapability(String path);
    128 }
    129