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/* Copyright (C) 1991, 1992, 1995, 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., 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 <features.h>
__BEGIN_DECLS
#include <gnu/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 __USE_GNU
/* Return a new stream open on the group file. */
extern FILE *__grpopen __P ((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 __P ((FILE * __stream, __ptr_t __g));
/* Return a chunk of memory containing pre-initialized data for __grpread. */
extern __ptr_t __grpalloc __P ((void));
/* Scan the group file, filling in G, until SELECTOR returns nonzero for an
entry. Return the `struct group' of G if successful, NULL on failure. */
extern struct group *__grpscan __P ((__ptr_t *__p,
int (*__selector) (struct group *)));
#endif
#if defined(__USE_SVID) || defined(__USE_MISC) || defined (__USE_BSD)
/* Rewind the group-file stream. */
extern void setgrent __P ((void));
/* Close the group-file stream. */
extern void endgrent __P ((void));
/* Read an entry from the group-file stream, opening it if necessary. */
extern struct group *getgrent __P ((void));
#endif
#ifdef __USE_SVID
/* Read a group entry from STREAM. */
extern struct group *fgetgrent __P ((FILE * __stream));
#endif
/* Search for an entry with a matching group ID. */
extern struct group *getgrgid __P ((__gid_t __gid));
/* Search for an entry with a matching group name. */
extern struct group *getgrnam __P ((__const char *__name));
#ifdef __USE_REENTRANT
/* Reasonable value for the buffer sized used in the reentrant
functions below. But better use `sysconf'. */
#define NSS_BUFLEN_GROUP 1024
/* Reentrant versions of some of the functions above.
PLEASE NOTE: these functions are not yet standardized. The interface
may change in later versions of this library. */
#if defined(__USE_SVID) || defined(__USE_MISC) || defined (__USE_BSD)
extern struct group *getgrent_r __P ((struct group *__resultbuf,
char *buffer, int __buflen));
#endif
/* Search for an entry with a matching group ID. */
extern struct group *getgrgid_r __P ((__gid_t __gid,
struct group *__resultbuf,
char *buffer, int __buflen));
/* Search for an entry with a matching group name. */
extern struct group *getgrnam_r __P ((__const char *__name,
struct group *__resultbuf,
char *buffer, int __buflen));
#endif /* reentrant */
#ifdef __USE_BSD
#define __need_size_t
#include <stddef.h>
/* Set the group set for the current user to GROUPS (N of them). */
extern int setgroups __P ((size_t __n, __const __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 include GROUP. */
extern int initgroups __P ((__const char *user, __gid_t group));
#endif /* Use BSD. */
__END_DECLS
#endif /* grp.h */
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