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1 /* Copyright (C) 1991, 92, 95, 96, 97, 98 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
20 * POSIX Standard: 9.2.1 Group Database Access <grp.h>
30 #include <bits/types.h>
36 /* For the Single Unix specification we must define this type here. */
37 #if defined __USE_XOPEN && !defined gid_t
38 typedef __gid_t gid_t
;
42 /* The group structure. */
45 char *gr_name
; /* Group name. */
46 char *gr_passwd
; /* Password. */
47 __gid_t gr_gid
; /* Group ID. */
48 char **gr_mem
; /* Member list. */
52 #if defined __USE_SVID || defined __USE_GNU
58 #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
59 /* Rewind the group-file stream. */
60 extern void setgrent
__P ((void));
62 /* Close the group-file stream. */
63 extern void endgrent
__P ((void));
65 /* Read an entry from the group-file stream, opening it if necessary. */
66 extern struct group
*getgrent
__P ((void));
70 /* Read a group entry from STREAM. */
71 extern struct group
*fgetgrent
__P ((FILE *__stream
));
75 /* Write the given entry onto the given stream. */
76 extern int putgrent
__P ((__const
struct group
*__restrict __p
,
77 FILE *__restrict __f
));
80 /* Search for an entry with a matching group ID. */
81 extern struct group
*getgrgid
__P ((__gid_t __gid
));
83 /* Search for an entry with a matching group name. */
84 extern struct group
*getgrnam
__P ((__const
char *__name
));
86 #if defined __USE_POSIX || defined __USE_MISC
89 /* Reasonable value for the buffer sized used in the reentrant
90 functions below. But better use `sysconf'. */
91 # define NSS_BUFLEN_GROUP 1024
94 /* Reentrant versions of some of the functions above.
96 PLEASE NOTE: the `getgrent_r' function is not (yet) standardized.
97 The interface may change in later versions of this library. But
98 the interface is designed following the principals used for the
99 other reentrant functions so the chances are good this is what the
100 POSIX people would choose. */
102 # if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
103 extern int getgrent_r
__P ((struct group
*__restrict __resultbuf
,
104 char *__restrict __buffer
, size_t __buflen
,
105 struct group
**__restrict __result
));
108 /* Search for an entry with a matching group ID. */
109 extern int getgrgid_r
__P ((__gid_t __gid
,
110 struct group
*__restrict __resultbuf
,
111 char *__restrict __buffer
, size_t __buflen
,
112 struct group
**__restrict __result
));
114 /* Search for an entry with a matching group name. */
115 extern int getgrnam_r
__P ((__const
char *__restrict __name
,
116 struct group
*__restrict __resultbuf
,
117 char *__restrict __buffer
, size_t __buflen
,
118 struct group
**__restrict __result
));
121 /* Read a group entry from STREAM. This function is not standardized
122 an probably never will. */
123 extern int fgetgrent_r
__P ((FILE *__restrict __stream
,
124 struct group
*__restrict __resultbuf
,
125 char *__restrict __buffer
, size_t __buflen
,
126 struct group
**__restrict __result
));
129 #endif /* POSIX or reentrant */
134 # define __need_size_t
137 /* Set the group set for the current user to GROUPS (N of them). */
138 extern int setgroups
__P ((size_t __n
, __const __gid_t
*__groups
));
140 /* Initialize the group set for the current user
141 by reading the group database and using all groups
142 of which USER is a member. Also include GROUP. */
143 extern int initgroups
__P ((__const
char *__user
, __gid_t __group
));
145 #endif /* Use BSD. */