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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- /
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
// This file is only loaded on Gonk to manage ADB state
Components.utils.import("resource://gre/modules/FileUtils.jsm");
const DEBUG = false;
var debug = function(str) {
dump("AdbController: " + str + "\n");
}
var AdbController = {
locked: undefined,
remoteDebuggerEnabled: undefined,
lockEnabled: undefined,
disableAdbTimer: null,
disableAdbTimeoutHours: 12,
umsActive: false,
setLockscreenEnabled: function(value) {
this.lockEnabled = value;
DEBUG && debug("setLockscreenEnabled = " + this.lockEnabled);
this.updateState();
},
setLockscreenState: function(value) {
this.locked = value;
DEBUG && debug("setLockscreenState = " + this.locked);
this.updateState();
},
setRemoteDebuggerState: function(value) {
this.remoteDebuggerEnabled = value;
DEBUG && debug("setRemoteDebuggerState = " + this.remoteDebuggerEnabled);
this.updateState();
},
startDisableAdbTimer: function() {
if (this.disableAdbTimer) {
this.disableAdbTimer.cancel();
} else {
this.disableAdbTimer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
try {
this.disableAdbTimeoutHours =
Services.prefs.getIntPref("b2g.adb.timeout-hours");
} catch (e) {
// This happens if the pref doesn't exist, in which case
// disableAdbTimeoutHours will still be set to the default.
}
}
if (this.disableAdbTimeoutHours <= 0) {
DEBUG && debug("Timer to disable ADB not started due to zero timeout");
return;
}
DEBUG && debug("Starting timer to disable ADB in " +
this.disableAdbTimeoutHours + " hours");
let timeoutMilliseconds = this.disableAdbTimeoutHours * 60 * 60 * 1000;
this.disableAdbTimer.initWithCallback(this, timeoutMilliseconds,
Ci.nsITimer.TYPE_ONE_SHOT);
},
stopDisableAdbTimer: function() {
DEBUG && debug("Stopping timer to disable ADB");
if (this.disableAdbTimer) {
this.disableAdbTimer.cancel();
this.disableAdbTimer = null;
}
},
notify: function(aTimer) {
if (aTimer == this.disableAdbTimer) {
this.disableAdbTimer = null;
// The following dump will be the last thing that shows up in logcat,
// and will at least give the user a clue about why logcat was
// disconnected, if the user happens to be using logcat.
debug("ADB timer expired - disabling ADB\n");
navigator.mozSettings.createLock().set(
{'debugger.remote-mode': 'disabled'});
}
},
updateState: function() {
this.umsActive = false;
},
updateStateInternal: function() {
DEBUG && debug("updateStateInternal: called");
if (this.remoteDebuggerEnabled === undefined ||
this.lockEnabled === undefined ||
this.locked === undefined) {
// Part of initializing the settings database will cause the observers
// to trigger. We want to wait until both have been initialized before
// we start changing ther adb state. Without this then we can wind up
// toggling adb off and back on again (or on and back off again).
//
// For completeness, one scenario which toggles adb is using the unagi.
// The unagi has adb enabled by default (prior to b2g starting). If you
// have the phone lock disabled and remote debugging enabled, then we'll
// receive an unlock event and an rde event. However at the time we
// receive the unlock event we haven't yet received the rde event, so
// we turn adb off momentarily, which disconnects a logcat that might
// be running. Changing the defaults (in AdbController) just moves the
// problem to a different phone, which has adb disabled by default and
// we wind up turning on adb for a short period when we shouldn't.
//
// By waiting until both values are properly initialized, we avoid
// turning adb on or off accidentally.
DEBUG && debug("updateState: Waiting for all vars to be initialized");
return;
}
// Check if we have a remote debugging session going on. If so, we won't
// disable adb even if the screen is locked.
let isDebugging = USBRemoteDebugger.isDebugging;
DEBUG && debug("isDebugging=" + isDebugging);
// If USB Mass Storage, USB tethering, or a debug session is active,
// then we don't want to disable adb in an automatic fashion (i.e.
// when the screen locks or due to timeout).
let sysUsbConfig = libcutils.property_get("sys.usb.config").split(",");
let usbFuncActive = this.umsActive || isDebugging;
usbFuncActive |= (sysUsbConfig.indexOf("rndis") >= 0);
usbFuncActive |= (sysUsbConfig.indexOf("mtp") >= 0);
let enableAdb = this.remoteDebuggerEnabled &&
(!(this.lockEnabled && this.locked) || usbFuncActive);
let useDisableAdbTimer = true;
try {
if (Services.prefs.getBoolPref("marionette.defaultPrefs.enabled")) {
// Marionette is enabled. Marionette requires that adb be on (and also
// requires that remote debugging be off). The fact that marionette
// is enabled also implies that we're doing a non-production build, so
// we want adb enabled all of the time.
enableAdb = true;
useDisableAdbTimer = false;
}
} catch (e) {
// This means that the pref doesn't exist. Which is fine. We just leave
// enableAdb alone.
}
// Check wakelock to prevent adb from disconnecting when phone is locked
let lockFile = Cc['@mozilla.org/file/local;1'].createInstance(Ci.nsIFile);
lockFile.initWithPath('/sys/power/wake_lock');
if(lockFile.exists()) {
let foStream = Cc["@mozilla.org/network/file-input-stream;1"]
.createInstance(Ci.nsIFileInputStream);
let coStream = Cc["@mozilla.org/intl/converter-input-stream;1"]
.createInstance(Ci.nsIConverterInputStream);
let str = {};
foStream.init(lockFile, FileUtils.MODE_RDONLY, 0, 0);
coStream.init(foStream, "UTF-8", 0, 0);
coStream.readString(-1, str);
coStream.close();
foStream.close();
let wakeLockContents = str.value.replace(/\n/, "");
let wakeLockList = wakeLockContents.split(" ");
if (wakeLockList.indexOf("adb") >= 0) {
enableAdb = true;
useDisableAdbTimer = false;
DEBUG && debug("Keeping ADB enabled as ADB wakelock is present.");
} else {
DEBUG && debug("ADB wakelock not found.");
}
} else {
DEBUG && debug("Wake_lock file not found.");
}
DEBUG && debug("updateState: enableAdb = " + enableAdb +
" remoteDebuggerEnabled = " + this.remoteDebuggerEnabled +
" lockEnabled = " + this.lockEnabled +
" locked = " + this.locked +
" usbFuncActive = " + usbFuncActive);
// Configure adb.
let currentConfig = libcutils.property_get("persist.sys.usb.config");
let configFuncs = currentConfig.split(",");
if (currentConfig == "" || currentConfig == "none") {
// We want to treat none like the empty string.
// "".split(",") yields [""] and not []
configFuncs = [];
}
let adbIndex = configFuncs.indexOf("adb");
if (enableAdb) {
// Add adb to the list of functions, if not already present
if (adbIndex < 0) {
configFuncs.push("adb");
}
} else {
// Remove adb from the list of functions, if present
if (adbIndex >= 0) {
configFuncs.splice(adbIndex, 1);
}
}
let newConfig = configFuncs.join(",");
if (newConfig == "") {
// Convert the empty string back into none, since that's what init.rc
// needs.
newConfig = "none";
}
if (newConfig != currentConfig) {
DEBUG && debug("updateState: currentConfig = " + currentConfig);
DEBUG && debug("updateState: newConfig = " + newConfig);
try {
libcutils.property_set("persist.sys.usb.config", newConfig);
} catch(e) {
Cu.reportError("Error configuring adb: " + e);
}
}
if (useDisableAdbTimer) {
if (enableAdb && !usbFuncActive) {
this.startDisableAdbTimer();
} else {
this.stopDisableAdbTimer();
}
}
}
};
SettingsListener.observe("lockscreen.locked", false,
AdbController.setLockscreenState.bind(AdbController));
SettingsListener.observe("lockscreen.enabled", false,
AdbController.setLockscreenEnabled.bind(AdbController));
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