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/* Copyright (C) 1993, 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _UTMP_H_
#define _UTMP_H_ 1
#include <features.h>
#include <sys/types.h>
/* Get system dependent values and data structures. */
#include <utmpbits.h>
/* Make FD be the controlling terminal, stdin, stdout, and stderr;
then close FD. Returns 0 on success, nonzero on error. */
extern int login_tty __P ((int fd));
/* Write the given entry into utmp and wtmp. */
extern void login __P ((__const struct utmp *));
/* Write the utmp entry to say the user on UT_LINE has logged out. */
extern int logout __P ((__const char *ut_line));
/* Append to wtmp an entry for the current time and the given info. */
extern void logwtmp __P ((__const char *ut_line, __const char *ut_name,
__const char *ut_host));
/* Change name of the utmp file to be examined. */
extern int utmpname __P ((__const char *__file));
/* Read next entry from a utmp-like file. */
extern struct utmp *getutent __P ((void));
/* Rest the input stream to the beginning of the file. */
extern void setutent __P ((void));
/* Close the current open file. */
extern void endutent __P ((void));
/* Search forward from the current point in the utmp file until the
next entry with a ut_type matching ID->ut_type. */
extern struct utmp *getutid __P ((__const struct utmp *__id));
/* Search forward from the current point in the utmp file until the
next entry with a ut_line matching LINE->ut_line. */
extern struct utmp *getutline __P ((__const struct utmp *__line));
/* Write out entry pointed to by UTMP_PTR into the utmp file. */
extern struct utmp *pututline __P ((__const struct utmp *__utmp_ptr));
#ifdef __USE_REENTRANT
/* Define the data structure needed for the reentrent version. */
struct utmp_data
{
int ut_fd;
off_t loc_utmp;
struct utmp ubuf;
};
/* Reentrent versions of the file for handling utmp files. */
extern int getutent_r __P ((struct utmp **__utmp,
struct utmp_data *__utmp_data));
extern void setutent_r __P ((struct utmp_data *__utmp_data));
extern void endutent_r __P ((struct utmp_data *__utmp_data));
extern int getutid_r __P ((__const struct utmp *__id, struct utmp **__utmp,
struct utmp_data *__utmp_data));
extern int getutline_r __P ((__const struct utmp *__line, struct utmp **__utmp,
struct utmp_data *__utmp_data));
extern int pututline_r __P ((__const struct utmp *__utmp_ptr,
struct utmp_data *__utmp_data));
#endif /* Use reentrant. */
__END_DECLS
#endif /* utmp.h */
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