1 /* Copyright (C) 1991, 1992, 1995, 1996 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
16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17 Cambridge, MA 02139, USA. */
20 * POSIX Standard: 9.2.1 Group Database Access <grp.h>
30 #include <gnu/types.h>
33 /* The group structure. */
36 char *gr_name; /* Group name. */
37 char *gr_passwd; /* Password. */
38 __gid_t gr_gid; /* Group ID. */
39 char **gr_mem; /* Member list. */
43 #if defined(__USE_SVID) || defined(__USE_GNU)
49 /* Return a new stream open on the group file. */
50 extern FILE *__grpopen __P ((void));
52 /* Read a group entry from STREAM, filling in G.
53 Return the `struct group' of G if successful, NULL on failure. */
54 extern struct group *__grpread __P ((FILE *__stream, __ptr_t __g));
56 /* Return a chunk of memory containing pre-initialized data for __grpread. */
57 extern __ptr_t __grpalloc __P ((void));
59 /* Scan the group file, filling in G, until SELECTOR returns nonzero for an
60 entry. Return the `struct group' of G if successful, NULL on failure. */
61 extern struct group *__grpscan __P ((__ptr_t *__p,
62 int (*__selector) (struct group *)));
66 #if defined(__USE_SVID) || defined(__USE_MISC) || defined (__USE_BSD)
67 /* Rewind the group-file stream. */
68 extern void setgrent __P ((void));
70 /* Close the group-file stream. */
71 extern void endgrent __P ((void));
73 /* Read an entry from the group-file stream, opening it if necessary. */
74 extern struct group *getgrent __P ((void));
78 /* Read a group entry from STREAM. */
79 extern struct group *fgetgrent __P ((FILE *__stream));
82 /* Search for an entry with a matching group ID. */
83 extern struct group *getgrgid __P ((__gid_t __gid));
85 /* Search for an entry with a matching group name. */
86 extern struct group *getgrnam __P ((__const char *__name));
88 #ifdef __USE_REENTRANT
89 /* Reasonable value for the buffer sized used in the reentrant
90 functions below. But better use `sysconf'. */
91 #define NSS_BUFLEN_GROUP 1024
93 /* Reentrant versions of some of the functions above.
95 PLEASE NOTE: these functions are not yet standardized. The interface
96 may change in later versions of this library. */
98 #if defined(__USE_SVID) || defined(__USE_MISC) || defined (__USE_BSD)
99 extern int getgrent_r __P ((struct group *__resultbuf, char *buffer,
100 size_t __buflen, struct group **__result));
103 /* Search for an entry with a matching group ID. */
104 extern int getgrgid_r __P ((__gid_t __gid, struct group *__resultbuf,
105 char *buffer, size_t __buflen,
106 struct group **__result));
108 /* Search for an entry with a matching group name. */
109 extern int getgrnam_r __P ((__const char *__name, struct group *__resultbuf,
110 char *buffer, size_t __buflen,
111 struct group **__result));
114 /* Read a group entry from STREAM. */
115 extern int __fgetgrent_r __P ((FILE * __stream, struct group *__resultbuf,
116 char *buffer, size_t __buflen,
117 struct group **__result));
118 extern int fgetgrent_r __P ((FILE * __stream, struct group *__resultbuf,
119 char *buffer, size_t __buflen,
120 struct group **__result));
123 #endif /* reentrant */
128 #define __need_size_t
131 /* Set the group set for the current user to GROUPS (N of them). */
132 extern int setgroups __P ((size_t __n, __const __gid_t *__groups));
134 /* Initialize the group set for the current user
135 by reading the group database and using all groups
136 of which USER is a member. Also include GROUP. */
137 extern int initgroups __P ((__const char *__user, __gid_t __group));
139 #endif /* Use BSD. */