c2b9fec50b
Require that users and groups found in /vendor/etc/{passwd,group}
start with vendor_. This is needed to compliance with Treble as
without this prefix, it is possible for a new system image to create a
user/group name that a vendor has already used, causing a collision.
Bug: 79528966
Test: new unit test
Change-Id: I07500641e165f41526a8101592d83fa174e7a711
101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
/*
|
|
* Copyright (C) 2018 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <grp.h>
|
|
#include <pwd.h>
|
|
|
|
#include "private/bionic_lock.h"
|
|
#include "private/bionic_macros.h"
|
|
#include "private/grp_pwd.h"
|
|
|
|
class MmapFile {
|
|
public:
|
|
MmapFile(const char* filename, const char* required_prefix);
|
|
|
|
template <typename Line>
|
|
bool FindById(uid_t uid, Line* line);
|
|
template <typename Line>
|
|
bool FindByName(const char* name, Line* line);
|
|
void Unmap();
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(MmapFile);
|
|
|
|
private:
|
|
enum class FileStatus {
|
|
Uninitialized,
|
|
Initialized,
|
|
Error,
|
|
};
|
|
|
|
bool GetFile(const char** start, const char** end);
|
|
bool DoMmap();
|
|
|
|
template <typename Line, typename Predicate>
|
|
bool Find(Line* line, Predicate predicate);
|
|
|
|
FileStatus status_ = FileStatus::Uninitialized;
|
|
Lock lock_;
|
|
const char* filename_ = nullptr;
|
|
const char* start_ = nullptr;
|
|
const char* end_ = nullptr;
|
|
const char* required_prefix_;
|
|
};
|
|
|
|
class PasswdFile {
|
|
public:
|
|
PasswdFile(const char* filename, const char* required_prefix);
|
|
|
|
bool FindById(uid_t id, passwd_state_t* passwd_state);
|
|
bool FindByName(const char* name, passwd_state_t* passwd_state);
|
|
void Unmap() {
|
|
mmap_file_.Unmap();
|
|
}
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(PasswdFile);
|
|
|
|
private:
|
|
MmapFile mmap_file_;
|
|
};
|
|
|
|
class GroupFile {
|
|
public:
|
|
GroupFile(const char* filename, const char* required_prefix);
|
|
|
|
bool FindById(gid_t id, group_state_t* group_state);
|
|
bool FindByName(const char* name, group_state_t* group_state);
|
|
void Unmap() {
|
|
mmap_file_.Unmap();
|
|
}
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(GroupFile);
|
|
|
|
private:
|
|
MmapFile mmap_file_;
|
|
};
|