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/* Internal definitions and declarations for UTMP functions.
Copyright (C) 1996-2019 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>
and Paul Janzen <pcj@primenet.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _UTMP_PRIVATE_H
#define _UTMP_PRIVATE_H 1
#include <utmp.h>
#include <libc-lock.h>
/* The structure describing the functions in a backend. */
struct utfuncs
{
int (*setutent) (void);
int (*getutent_r) (struct utmp *, struct utmp **);
int (*getutid_r) (const struct utmp *, struct utmp *, struct utmp **);
int (*getutline_r) (const struct utmp *, struct utmp *, struct utmp **);
struct utmp *(*pututline) (const struct utmp *);
void (*endutent) (void);
int (*updwtmp) (const char *, const struct utmp *);
};
/* The tables from the services. */
extern const struct utfuncs __libc_utmp_file_functions attribute_hidden;
extern const struct utfuncs __libc_utmp_unknown_functions attribute_hidden;
/* Currently selected backend. */
extern const struct utfuncs *__libc_utmp_jump_table attribute_hidden;
/* Current file name. */
extern const char *__libc_utmp_file_name attribute_hidden;
/* Locks access to the global data. */
__libc_lock_define (extern, __libc_utmp_lock attribute_hidden)
#endif /* utmp-private.h */
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