Merge "Use init to write usb typec props." into mnc-dr-dev

import android.hardware.usb.UsbPortStatus;

import android.os.Handler;

import android.os.Message;

import android.os.SystemClock;

import android.os.SystemProperties;

import android.os.UEventObserver;

import android.os.UserHandle;

import android.system.ErrnoException;

import android.system.Os;

import android.system.OsConstants;

import android.util.ArrayMap;

import android.util.Log;

import android.util.Slog;

    private static final String PORT_DATA_ROLE_HOST = "host";

    private static final String PORT_DATA_ROLE_DEVICE = "device";

    private static final String USB_TYPEC_PROP_PREFIX = "sys.usb.typec.";

    private static final String USB_TYPEC_STATE = "sys.usb.typec.state";

    // All non-trivial role combinations.

    private static final int COMBO_SOURCE_HOST =

            UsbPort.combineRolesAsBit(UsbPort.POWER_ROLE_SOURCE, UsbPort.DATA_ROLE_HOST);

        return 0;

    }

    private static boolean fileIsRootWritable(String path) {

        try {

            // If the file is user writable, then it is root writable.

            return (Os.stat(path).st_mode & OsConstants.S_IWUSR) != 0;

        } catch (ErrnoException e) {

            return false;

        }

    }

    private static boolean canChangeMode(File portDir) {

        return new File(portDir, SYSFS_PORT_MODE).canWrite();

        return fileIsRootWritable(new File(portDir, SYSFS_PORT_MODE).getPath());

    }

    private static boolean canChangePowerRole(File portDir) {

        return new File(portDir, SYSFS_PORT_POWER_ROLE).canWrite();

        return fileIsRootWritable(new File(portDir, SYSFS_PORT_POWER_ROLE).getPath());

    }

    private static boolean canChangeDataRole(File portDir) {

        return new File(portDir, SYSFS_PORT_DATA_ROLE).canWrite();

        return fileIsRootWritable(new File(portDir, SYSFS_PORT_DATA_ROLE).getPath());

    }

    private static String readFile(File dir, String filename) {

        }

    }

    private static boolean writeFile(File dir, String filename, String contents) {

        final File file = new File(dir, filename);

        try {

            try (FileWriter writer = new FileWriter(file)) {

                writer.write(contents);

    private static boolean waitForState(String property, String state) {

        // wait for the transition to complete.

        // give up after 5 seconds.

        // 5 seconds is probably too long, but we have seen hardware that takes

        // over 3 seconds to change states.

        String value = null;

        for (int i = 0; i < 100; i++) {

            // State transition is done when property is set to the new configuration

            value = SystemProperties.get(property);

            if (state.equals(value)) return true;

            SystemClock.sleep(50);

        }

            return true;

        } catch (IOException ex) {

        Slog.e(TAG, "waitForState(" + state + ") for " + property + " FAILED: got " + value);

        return false;

    }

    private static String propertyFromFilename(String filename) {

        return USB_TYPEC_PROP_PREFIX + filename;

    }

    private static boolean writeFile(File dir, String filename, String contents) {

        SystemProperties.set(propertyFromFilename(filename), contents);

        return waitForState(USB_TYPEC_STATE, contents);

    }

    private static void logAndPrint(int priority, IndentingPrintWriter pw, String msg) {