/* Copyright (C) 1991 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., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

/*
 *	POSIX Standard: 9.2.1 Group Database Access	<grp.h>
 */

#ifndef	_GRP_H

#define	_GRP_H	1

#include <traditional.h>
#include <features.h>
#include <sys/types.h>

/* The group structure.	 */
struct group
  {
    char *gr_name;	/* Group name.	*/
    char *gr_passwd;	/* Password.	*/
    gid_t gr_gid;	/* Group ID.	*/
    char **gr_mem;	/* Member list.	*/
  };


#if defined(__USE_SVID) || defined(__USE_GNU)
#define	__need_FILE
#include <stdio.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

#ifdef	__USE_GNU
/* Return a new stream open on the group file.  */
extern FILE *__grpopen _ARGS ((void));

/* Read a group entry from STREAM, filling in G.
   Return the `struct group' of G if successful, NULL on failure.  */
extern struct group *__grpread _ARGS ((FILE *__stream, void * __g));

/* Return a chunk of memory containing pre-initialized data for __grpread.  */
extern void * __grpalloc _ARGS ((void));
#endif


#if defined (__USE_SVID) || defined(__USE_MISC)
/* Rewind the group-file stream.  */
extern void setgrent _ARGS ((void));

/* Close the group-file stream.  */
extern void endgrent _ARGS ((void));

/* Read an entry from the group-file stream, opening it if necessary.  */
extern struct group *getgrent _ARGS ((void));
#endif

#ifdef	__USE_SVID
/* Read a group entry from STREAM.  */
extern struct group *fgetgrent _ARGS ((FILE *__stream));
#endif

/* Search for an entry with a matching group ID.  */
extern struct group *getgrgid _ARGS ((gid_t __gid));

/* Search for an entry with a matching group name.  */
extern struct group *getgrnam _ARGS ((const char *__name));

#ifdef __cplusplus
}
#endif

#ifdef	__USE_BSD

#ifndef __STDC__
#define	__need_size_t
#include <stddef.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

/* Set the group set for the current user to GROUPS (N of them).  */
extern int setgroups _ARGS ((int __n, gid_t *__groups));

/* Initialize the group set for the current user
   by reading the group database and using all groups
   of which USER is a member.  Also  GROUP.  */
extern int initgroups _ARGS ((const char *__user, gid_t __group));

#endif	/* Use BSD.  */

#ifdef __cplusplus
}
#endif

#endif	/* grp.h  */