content: /*
   * Copyright (C) 2011 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package top.niunaijun.blackbox.core.system.user;
  
  import android.os.Binder;
  import android.os.Parcel;
  import android.os.Parcelable;
  import android.os.Process;
  
  /**
   * Representation of a user on the device.
   */
  public final class BUserHandle implements Parcelable {
      // NOTE: keep logic in sync with system/core/libcutils/multiuser.c
  
      /**
       * @hide Range of uids allocated for a user.
       */
      public static final int PER_USER_RANGE = 100000;
  
      /**
       * @hide A user id to indicate all users on the device
       */
      public static final int USER_ALL = -1;
  
      /**
       * @hide A user handle to indicate all users on the device
       */
      public static final BUserHandle ALL = new BUserHandle(USER_ALL);
  
      /**
       * @hide A user id to indicate the currently active user
       */
      public static final int USER_CURRENT = -2;
  
      /**
       * @hide A user handle to indicate the current user of the device
       */
      public static final BUserHandle CURRENT = new BUserHandle(USER_CURRENT);
  
      /**
       * @hide A user id to indicate that we would like to send to the current
       * user, but if this is calling from a user process then we will send it
       * to the caller's user instead of failing with a security exception
       */
      public static final int USER_CURRENT_OR_SELF = -3;
  
  
      public static final int USER_XPOSED = -4;
  
      /**
       * @hide A user handle to indicate that we would like to send to the current
       * user, but if this is calling from a user process then we will send it
       * to the caller's user instead of failing with a security exception
       */
      public static final BUserHandle CURRENT_OR_SELF = new BUserHandle(USER_CURRENT_OR_SELF);
  
      /**
       * @hide An undefined user id
       */
      public static final int USER_NULL = -10000;
  
      /**
       * @hide A user id constant to indicate the "owner" user of the device
       * @deprecated Consider using either {@link BUserHandle#USER_SYSTEM} constant or
       * check the target user's flag {@link }.
       */
      @Deprecated
      public static final int USER_OWNER = 0;
  
      /**
       * @hide A user handle to indicate the primary/owner user of the device
       * @deprecated Consider using either {@link BUserHandle#SYSTEM} constant or
       * check the target user's flag {@link }.
       */
      @Deprecated
      public static final BUserHandle OWNER = new BUserHandle(USER_OWNER);
  
      /**
       * @hide A user id constant to indicate the "system" user of the device
       */
      public static final int USER_SYSTEM = 0;
  
      /**
       * @hide A user serial constant to indicate the "system" user of the device
       */
      public static final int USER_SERIAL_SYSTEM = 0;
  
      /**
       * @hide A user handle to indicate the "system" user of the device
       */
      public static final BUserHandle SYSTEM = new BUserHandle(USER_SYSTEM);
  
      /**
       * @hide Enable multi-user related side effects. Set this to false if
       * there are problems with single user use-cases.
       */
      public static final boolean MU_ENABLED = true;
  
      /**
       * @hide
       */
      public static final int ERR_GID = -1;
      /**
       * @hide
       */
      public static final int AID_ROOT = 0;
      /**
       * @hide
       */
      public static final int AID_APP_START = android.os.Process.FIRST_APPLICATION_UID;
      /**
       * @hide
       */
      public static final int AID_APP_END = android.os.Process.LAST_APPLICATION_UID;
      /**
       * @hide
       */
      public static final int AID_SHARED_GID_START = 50000;
      /**
       * @hide
       */
      public static final int AID_CACHE_GID_START = 20000;
  
      final int mHandle;
  
      /**
       * Checks to see if the user id is the same for the two uids, i.e., they belong to the same
       * user.
       *
       * @hide
       */
      public static boolean isSameUser(int uid1, int uid2) {
          return getUserId(uid1) == getUserId(uid2);
      }
  
      /**
       * Checks to see if both uids are referring to the same app id, ignoring the user id part of the
       * uids.
       *
       * @param uid1 uid to compare
       * @param uid2 other uid to compare
       * @return whether the appId is the same for both uids
       * @hide
       */
      public static boolean isSameApp(int uid1, int uid2) {
          return getAppId(uid1) == getAppId(uid2);
      }
  
      /**
       * Whether a UID belongs to a regular app. *Note* "Not a regular app" does not mean
       * "it's system", because of isolated UIDs. Use {@link #isCore} for that.
       *
       * @hide
       */
      public static boolean isApp(int uid) {
          if (uid > 0) {
              final int appId = getAppId(uid);
              return appId >= Process.FIRST_APPLICATION_UID && appId <= Process.LAST_APPLICATION_UID;
          } else {
              return false;
          }
      }
  
      /**
       * Whether a UID belongs to a system core component or not.
       *
       * @hide
       */
      public static boolean isCore(int uid) {
          if (uid >= 0) {
              final int appId = getAppId(uid);
              return appId < Process.FIRST_APPLICATION_UID;
          } else {
              return false;
          }
      }
  
      /**
       * Returns the user for a given uid.
       *
       * @param uid A uid for an application running in a particular user.
       * @return A {@link BUserHandle} for that user.
       */
      public static BUserHandle getUserHandleForUid(int uid) {
          return of(getUserId(uid));
      }
  
      /**
       * Returns the user id for a given uid.
       *
       * @hide
       */
      public static int getUserId(int uid) {
          if (MU_ENABLED) {
              return uid / PER_USER_RANGE;
          } else {
              return BUserHandle.USER_SYSTEM;
          }
      }
  
      /**
       * @hide
       */
      public static int getCallingUserId() {
          return getUserId(Binder.getCallingUid());
      }
  
      /**
       * @hide
       */
      public static int getCallingAppId() {
          return getAppId(Binder.getCallingUid());
      }
  
      /**
       * @hide
       */
      public static BUserHandle of(int userId) {
          return userId == USER_SYSTEM ? SYSTEM : new BUserHandle(userId);
      }
  
      /**
       * Returns the uid that is composed from the userId and the appId.
       *
       * @hide
       */
      public static int getUid(int userId, int appId) {
          if (MU_ENABLED) {
              return userId * PER_USER_RANGE + (appId % PER_USER_RANGE);
          } else {
              return appId;
          }
      }
  
      /**
       * Returns the app id (or base uid) for a given uid, stripping out the user id from it.
       *
       * @hide
       */
      public static int getAppId(int uid) {
          return uid % PER_USER_RANGE;
      }
  
      /**
       * Returns the gid shared between all apps with this userId.
       *
       * @hide
       */
      public static int getUserGid(int userId) {
          return getUid(userId, 9997 /*Process.SHARED_USER_GID*/);
      }
  
      /**
       * @hide
       */
      public static int getSharedAppGid(int uid) {
          return getSharedAppGid(getUserId(uid), getAppId(uid));
      }
  
      /**
       * @hide
       */
      public static int getSharedAppGid(int userId, int appId) {
          if (appId >= AID_APP_START && appId <= AID_APP_END) {
              return (appId - AID_APP_START) + AID_SHARED_GID_START;
          } else if (appId >= AID_ROOT && appId <= AID_APP_START) {
              return appId;
          } else {
              return -1;
          }
      }
  
      /**
       * Returns the app id for a given shared app gid. Returns -1 if the ID is invalid.
       * @hide
       */
  //    public static int getAppIdFromSharedAppGid(int gid) {
  //        final int appId = getAppId(gid) + Process.FIRST_APPLICATION_UID
  //                - Process.FIRST_SHARED_APPLICATION_GID;
  //        if (appId < 0 || appId >= Process.FIRST_SHARED_APPLICATION_GID) {
  //            return -1;
  //        }
  //        return appId;
  //    }
  
      /**
       * @hide
       */
      public static int getCacheAppGid(int uid) {
          return getCacheAppGid(getUserId(uid), getAppId(uid));
      }
  
      /**
       * @hide
       */
      public static int getCacheAppGid(int userId, int appId) {
          if (appId >= AID_APP_START && appId <= AID_APP_END) {
              return getUid(userId, (appId - AID_APP_START) + AID_CACHE_GID_START);
          } else {
              return -1;
          }
      }
  
      /**
       * @hide
       */
      public static int parseUserArg(String arg) {
          int userId;
          if ("all".equals(arg)) {
              userId = BUserHandle.USER_ALL;
          } else if ("current".equals(arg) || "cur".equals(arg)) {
              userId = BUserHandle.USER_CURRENT;
          } else {
              try {
                  userId = Integer.parseInt(arg);
              } catch (NumberFormatException e) {
                  throw new IllegalArgumentException("Bad user number: " + arg);
              }
          }
          return userId;
      }
  
      /**
       * Returns the user id of the current process
       *
       * @return user id of the current process
       * @hide
       */
      public static int myUserId() {
          return getUserId(Process.myUid());
      }
  
      /**
       * Returns true if this UserHandle refers to the owner user; false otherwise.
       *
       * @return true if this UserHandle refers to the owner user; false otherwise.
       * @hide
       * @deprecated please use {@link #isSystem()} or check for
       */
      @Deprecated
      public boolean isOwner() {
          return this.equals(OWNER);
      }
  
      /**
       * @return true if this UserHandle refers to the system user; false otherwise.
       * @hide
       */
      public boolean isSystem() {
          return this.equals(SYSTEM);
      }
  
      /**
       * @hide
       */
      public BUserHandle(int h) {
          mHandle = h;
      }
  
      /**
       * Returns the userId stored in this UserHandle.
       *
       * @hide
       */
      public int getIdentifier() {
          return mHandle;
      }
  
      @Override
      public String toString() {
          return "UserHandle{" + mHandle + "}";
      }
  
      @Override
      public boolean equals(Object obj) {
          try {
              if (obj != null) {
                  BUserHandle other = (BUserHandle) obj;
                  return mHandle == other.mHandle;
              }
          } catch (ClassCastException e) {
          }
          return false;
      }
  
      @Override
      public int hashCode() {
          return mHandle;
      }
  
      public int describeContents() {
          return 0;
      }
  
      public void writeToParcel(Parcel out, int flags) {
          out.writeInt(mHandle);
      }
  
      /**
       * Write a UserHandle to a Parcel, handling null pointers.  Must be
       * read with {@link #readFromParcel(Parcel)}.
       *
       * @param h   The UserHandle to be written.
       * @param out The Parcel in which the UserHandle will be placed.
       * @see #readFromParcel(Parcel)
       */
      public static void writeToParcel(BUserHandle h, Parcel out) {
          if (h != null) {
              h.writeToParcel(out, 0);
          } else {
              out.writeInt(USER_NULL);
          }
      }
  
      /**
       * Read a UserHandle from a Parcel that was previously written
       * with {@link #writeToParcel(BUserHandle, Parcel)}, returning either
       * a null or new object as appropriate.
       *
       * @param in The Parcel from which to read the UserHandle
       * @return Returns a new UserHandle matching the previously written
       * object, or null if a null had been written.
       * @see #writeToParcel(BUserHandle, Parcel)
       */
      public static BUserHandle readFromParcel(Parcel in) {
          int h = in.readInt();
          return h != USER_NULL ? new BUserHandle(h) : null;
      }
  
      public static final Parcelable.Creator<BUserHandle> CREATOR
              = new Creator<BUserHandle>() {
          public BUserHandle createFromParcel(Parcel in) {
              return new BUserHandle(in);
          }
  
          public BUserHandle[] newArray(int size) {
              return new BUserHandle[size];
          }
      };
  
      /**
       * Instantiate a new UserHandle from the data in a Parcel that was
       * previously written with {@link #writeToParcel(Parcel, int)}.  Note that you
       * must not use this with data written by
       * {@link #writeToParcel(BUserHandle, Parcel)} since it is not possible
       * to handle a null UserHandle here.
       *
       * @param in The Parcel containing the previously written UserHandle,
       *           positioned at the location in the buffer where it was written.
       */
      public BUserHandle(Parcel in) {
          mHandle = in.readInt();
      }
  }
  