| /* |
| * 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(); |
| |
| BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(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(); |
| } |
| |
| BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(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(); |
| } |
| |
| BIONIC_DISALLOW_IMPLICIT_CONSTRUCTORS(GroupFile); |
| |
| private: |
| MmapFile mmap_file_; |
| }; |