/*
 * Copyright 2008, Ingo Weinhold, ingo_weinhold@gmx.de. All rights reserved.
 * Distributed under the terms of the MIT License.
 */
#ifndef _LIBROOT_USER_GROUP_COMMON_H
#define _LIBROOT_USER_GROUP_COMMON_H

#include <grp.h>
#include <pwd.h>
#include <shadow.h>

#include <OS.h>


#define MAX_PASSWD_NAME_LEN                     (32)
#define MAX_PASSWD_PASSWORD_LEN         (32)
#define MAX_PASSWD_REAL_NAME_LEN        (128)
#define MAX_PASSWD_HOME_DIR_LEN         (B_PATH_NAME_LENGTH)
#define MAX_PASSWD_SHELL_LEN            (B_PATH_NAME_LENGTH)

#define MAX_PASSWD_BUFFER_SIZE  (       \
        MAX_PASSWD_NAME_LEN                             \
        + MAX_PASSWD_PASSWORD_LEN               \
        + MAX_PASSWD_REAL_NAME_LEN              \
        + MAX_PASSWD_HOME_DIR_LEN               \
        + MAX_PASSWD_SHELL_LEN)

#define MAX_GROUP_NAME_LEN                      (32)
#define MAX_GROUP_PASSWORD_LEN          (32)
#define MAX_GROUP_MEMBER_COUNT          (32)

#define MAX_GROUP_BUFFER_SIZE   (       \
        MAX_GROUP_NAME_LEN                              \
        + MAX_GROUP_PASSWORD_LEN                \
        + ((MAX_GROUP_MEMBER_COUNT + 1) * sizeof(char*)))
        // MAX_GROUP_NAME_LEN and MAX_GROUP_PASSWORD_LEN are char* aligned


#define MAX_SHADOW_PWD_NAME_LEN                 (32)
#define MAX_SHADOW_PWD_PASSWORD_LEN             (137)

#define MAX_SHADOW_PWD_BUFFER_SIZE      (       \
        MAX_SHADOW_PWD_NAME_LEN                         \
        + MAX_SHADOW_PWD_PASSWORD_LEN)


#ifdef __cplusplus

#include <AutoLocker.h>


namespace BPrivate {

class KMessage;
class Tokenizer;

extern const char* kPasswdFile;
extern const char* kGroupFile;
extern const char* kShadowPwdFile;


// locking

status_t user_group_lock();
status_t user_group_unlock();


class UserGroupLocking {
public:
    inline bool Lock(int*)
    {
        return user_group_lock() == B_OK;
    }

    inline void Unlock(int*)
    {
        user_group_unlock();
    }
};


class UserGroupLocker : public AutoLocker<int, UserGroupLocking> {
public:
        UserGroupLocker()
                : AutoLocker<int, UserGroupLocking>((int*)1)
        {
        }
};


port_id         get_registrar_authentication_port();
void            set_registrar_authentication_port(port_id port);
status_t        send_authentication_request_to_registrar(KMessage& request,
                                KMessage& reply);


template<typename Type>
static inline Type*
relocate_pointer(addr_t baseAddress, Type*& address)
{
        return address = (Type*)(baseAddress + (addr_t)address);
}


// passwd

status_t copy_passwd_to_buffer(const char* name, const char* password, uid_t uid,
        gid_t gid, const char* home, const char* shell, const char* realName,
        passwd* entry, char* buffer, size_t bufferSize);
status_t copy_passwd_to_buffer(const passwd* from, passwd* entry, char* buffer,
        size_t bufferSize);

status_t parse_passwd_line(char* line, char*& name, char*& password, uid_t& uid,
        gid_t& gid, char*& home, char*& shell, char*& realName);


// group

status_t copy_group_to_buffer(const char* name, const char* password, gid_t gid,
        const char* const* members, int memberCount, group* entry, char* buffer,
        size_t bufferSize);
status_t copy_group_to_buffer(const group* from, group* entry, char* buffer,
        size_t bufferSize);

status_t parse_group_line(char* line, char*& name, char*& password, gid_t& gid,
        char** members, int& memberCount);


// shadow password

status_t copy_shadow_pwd_to_buffer(const char* name, const char* password,
        int lastChanged, int min, int max, int warn, int inactive, int expiration,
        int flags, spwd* entry, char* buffer, size_t bufferSize);
status_t copy_shadow_pwd_to_buffer(const spwd* from, spwd* entry,
        char* buffer, size_t bufferSize);

status_t parse_shadow_pwd_line(char* line, char*& name, char*& password,
        int& lastChanged, int& min, int& max, int& warn, int& inactive,
        int& expiration, int& flags);


}       // namespace BPrivate


#endif  // __cplusplus

#endif  // _LIBROOT_USER_GROUP_COMMON_H