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‎Android.mk

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LOCAL_PATH := $(call my-dir)
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include $(CLEAR_VARS)
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LOCAL_MODULE := su
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LOCAL_SRC_FILES := su.c activity.cpp
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LOCAL_C_INCLUDES += external/sqlite/dist
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LOCAL_SHARED_LIBRARIES := liblog libsqlite libandroid_runtime
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LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES)
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include $(BUILD_EXECUTABLE)

‎MODULE_LICENSE_APACHE2

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‎NOTICE

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Copyright (c) 2005-2008, The Android Open Source Project
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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1. Definitions.
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"License" shall mean the terms and conditions for use, reproduction,
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and distribution as defined by Sections 1 through 9 of this document.
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"Licensor" shall mean the copyright owner or entity authorized by
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the copyright owner that is granting the License.
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"Legal Entity" shall mean the union of the acting entity and all
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other entities that control, are controlled by, or are under common
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control with that entity. For the purposes of this definition,
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"control" means (i) the power, direct or indirect, to cause the
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direction or management of such entity, whether by contract or
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"You" (or "Your") shall mean an individual or Legal Entity
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"Work" shall mean the work of authorship, whether in Source or
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6. Trademarks. This License does not grant permission to use the trade
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7. Disclaimer of Warranty. Unless required by applicable law or
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8. Limitation of Liability. In no event and under no legal theory,
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whether in tort (including negligence), contract, or otherwise,
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unless required by applicable law (such as deliberate and grossly
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END OF TERMS AND CONDITIONS
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‎README

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This is the su binary for Superuser on Android.
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Any app that requires root access must call this binary in order to be given root access.
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Branches for this repo support the following Android versions:
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- legacy
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- cupcake
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- donut
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- master
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- eclair
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- froyo
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- gingerbread
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- honeycomb*
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Branches marked with '-dev' are in work and should probably not be used. I will push to those channels as I develop new versions so they may be broken from time to time.
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* I have yet to personally test superuser on any honeycomb devices, therefore I cannot guarantee it's compatibility

‎activity.cpp

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#include <unistd.h>
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#include <android_runtime/ActivityManager.h>
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#include <binder/IBinder.h>
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#include <binder/IServiceManager.h>
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#include <binder/Parcel.h>
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#include <utils/String8.h>
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#include <assert.h>
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extern "C" {
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#include "su.h"
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#include <private/android_filesystem_config.h>
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#include <cutils/properties.h>
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}
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using namespace android;
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static const int BROADCAST_INTENT_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION + 13;
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static const int NULL_TYPE_ID = 0;
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static const int VAL_STRING = 0;
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static const int VAL_INTEGER = 1;
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static const int START_SUCCESS = 0;
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int send_intent(struct su_initiator *from, struct su_request *to, const char *socket_path, int type)
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{
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char sdk_version_prop[PROPERTY_VALUE_MAX] = "0";
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property_get("ro.build.version.sdk", sdk_version_prop, "0");
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int sdk_version = atoi(sdk_version_prop);
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sp<IServiceManager> sm = defaultServiceManager();
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sp<IBinder> am = sm->checkService(String16("activity"));
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assert(am != NULL);
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Parcel data, reply;
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data.writeInterfaceToken(String16("android.app.IActivityManager"));
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data.writeStrongBinder(NULL); /* caller */
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/* intent */
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if (type == 0) {
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data.writeString16(String16("com.noshufou.android.su.REQUEST")); /* action */
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} else {
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data.writeString16(String16("com.noshufou.android.su.NOTIFICATION")); /* action */
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}
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data.writeInt32(NULL_TYPE_ID); /* Uri - data */
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data.writeString16(NULL, 0); /* type */
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data.writeInt32(0); /* flags */
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if (sdk_version >= 4) {
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// added in donut
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data.writeString16(NULL, 0); /* package name - DONUT ONLY, NOT IN CUPCAKE. */
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}
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data.writeString16(NULL, 0); /* ComponentName - package */
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data.writeInt32(0); /* Categories - size */
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if (sdk_version >= 7) {
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// added in eclair rev 7
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data.writeInt32(0);
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}
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{ /* Extras */
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data.writeInt32(-1); /* dummy, will hold length */
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int oldPos = data.dataPosition();
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data.writeInt32(0x4C444E42); // 'B' 'N' 'D' 'L'
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{ /* writeMapInternal */
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data.writeInt32(4); /* writeMapInternal - size */
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data.writeInt32(VAL_STRING);
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data.writeString16(String16("caller_uid"));
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data.writeInt32(VAL_INTEGER);
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data.writeInt32(from->uid);
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data.writeInt32(VAL_STRING);
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data.writeString16(String16("desired_uid"));
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data.writeInt32(VAL_INTEGER);
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data.writeInt32(to->uid);
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data.writeInt32(VAL_STRING);
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data.writeString16(String16("desired_cmd"));
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data.writeInt32(VAL_STRING);
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data.writeString16(String16(to->command));
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data.writeInt32(VAL_STRING);
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data.writeString16(String16("socket"));
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data.writeInt32(VAL_STRING);
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data.writeString16(String16(socket_path));
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}
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int newPos = data.dataPosition();
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data.setDataPosition(oldPos - 4);
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data.writeInt32(newPos - oldPos); /* length */
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data.setDataPosition(newPos);
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}
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data.writeString16(NULL, 0); /* resolvedType */
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data.writeInt32(-1); /* Not sure what this is for, but it prevents a warning */
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data.writeStrongBinder(NULL); /* resultTo */
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data.writeInt32(-1); /* resultCode */
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data.writeString16(NULL, 0); /* resultData */
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data.writeInt32(-1); /* resultExtras */
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data.writeString16(String16("com.noshufou.android.su.RESPOND")); /* perm */
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data.writeInt32(0); /* serialized */
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data.writeInt32(0); /* sticky */
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data.writeInt32(-1);
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status_t ret = am->transact(BROADCAST_INTENT_TRANSACTION, data, &reply);
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if (ret < START_SUCCESS) return -1;
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return 0;
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}

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