android su文件,Android su开放root权限

一.SU相关的源码

1)su.c

/*

**

** Copyright 2008, 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.

*/

#define LOG_TAG "su"

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

void pwtoid(const char *tok, uid_t *uid, gid_t *gid)

{

struct passwd *pw;

pw = getpwnam(tok);

if (pw) {

if (uid) *uid = pw->pw_uid;

if (gid) *gid = pw->pw_gid;

} else {

uid_t tmpid = atoi(tok);

if (uid) *uid = tmpid;