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a784e502 | 1 | /* Copyright (C) 1991,1992,1995-2001,2003,2004,2010,2012 |
dfe11a13 | 2 | Free Software Foundation, Inc. |
2c6fe0bd | 3 | This file is part of the GNU C Library. |
28f540f4 | 4 | |
2c6fe0bd | 5 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
28f540f4 | 9 | |
2c6fe0bd UD |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
28f540f4 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 RM |
18 | |
19 | /* | |
20 | * POSIX Standard: 9.2.1 Group Database Access <grp.h> | |
21 | */ | |
22 | ||
23 | #ifndef _GRP_H | |
28f540f4 | 24 | #define _GRP_H 1 |
5107cf1d | 25 | |
28f540f4 RM |
26 | #include <features.h> |
27 | ||
28 | __BEGIN_DECLS | |
29 | ||
5107cf1d | 30 | #include <bits/types.h> |
28f540f4 | 31 | |
0f110f41 TBB |
32 | #define __need_size_t |
33 | #include <stddef.h> | |
34 | ||
28f540f4 | 35 | |
9756dfe1 | 36 | /* For the Single Unix specification we must define this type here. */ |
7a80496f | 37 | #if (defined __USE_XOPEN || defined __USE_XOPEN2K) && !defined __gid_t_defined |
9756dfe1 | 38 | typedef __gid_t gid_t; |
7df789e0 | 39 | # define __gid_t_defined |
9756dfe1 UD |
40 | #endif |
41 | ||
28f540f4 RM |
42 | /* The group structure. */ |
43 | struct group | |
44 | { | |
45 | char *gr_name; /* Group name. */ | |
46 | char *gr_passwd; /* Password. */ | |
47 | __gid_t gr_gid; /* Group ID. */ | |
48 | char **gr_mem; /* Member list. */ | |
49 | }; | |
50 | ||
51 | ||
dfd2257a UD |
52 | #if defined __USE_SVID || defined __USE_GNU |
53 | # define __need_FILE | |
54 | # include <stdio.h> | |
28f540f4 RM |
55 | #endif |
56 | ||
28f540f4 | 57 | |
dfd2257a | 58 | #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED |
2c008571 | 59 | /* Rewind the group-file stream. |
28f540f4 | 60 | |
2c008571 UD |
61 | This function is a possible cancellation point and therefore not |
62 | marked with __THROW. */ | |
63 | extern void setgrent (void); | |
dfe11a13 | 64 | #endif |
28f540f4 | 65 | |
dfe11a13 UD |
66 | #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED \ |
67 | || defined __USE_XOPEN2K8 | |
2c008571 UD |
68 | /* Close the group-file stream. |
69 | ||
70 | This function is a possible cancellation point and therefore not | |
71 | marked with __THROW. */ | |
72 | extern void endgrent (void); | |
73 | ||
74 | /* Read an entry from the group-file stream, opening it if necessary. | |
75 | ||
76 | This function is a possible cancellation point and therefore not | |
77 | marked with __THROW. */ | |
78 | extern struct group *getgrent (void); | |
28f540f4 RM |
79 | #endif |
80 | ||
81 | #ifdef __USE_SVID | |
2c008571 UD |
82 | /* Read a group entry from STREAM. |
83 | ||
84 | This function is not part of POSIX and therefore no official | |
85 | cancellation point. But due to similarity with an POSIX interface | |
86 | or due to the implementation it is a cancellation point and | |
87 | therefore not marked with __THROW. */ | |
88 | extern struct group *fgetgrent (FILE *__stream); | |
28f540f4 RM |
89 | #endif |
90 | ||
7ce241a0 | 91 | #ifdef __USE_GNU |
2c008571 UD |
92 | /* Write the given entry onto the given stream. |
93 | ||
94 | This function is not part of POSIX and therefore no official | |
95 | cancellation point. But due to similarity with an POSIX interface | |
96 | or due to the implementation it is a cancellation point and | |
97 | therefore not marked with __THROW. */ | |
a784e502 | 98 | extern int putgrent (const struct group *__restrict __p, |
2c008571 | 99 | FILE *__restrict __f); |
7ce241a0 UD |
100 | #endif |
101 | ||
2c008571 UD |
102 | /* Search for an entry with a matching group ID. |
103 | ||
104 | This function is a possible cancellation point and therefore not | |
105 | marked with __THROW. */ | |
106 | extern struct group *getgrgid (__gid_t __gid); | |
107 | ||
108 | /* Search for an entry with a matching group name. | |
28f540f4 | 109 | |
2c008571 UD |
110 | This function is a possible cancellation point and therefore not |
111 | marked with __THROW. */ | |
a784e502 | 112 | extern struct group *getgrnam (const char *__name); |
28f540f4 | 113 | |
19361cb7 UD |
114 | #if defined __USE_POSIX || defined __USE_MISC |
115 | ||
dfd2257a | 116 | # ifdef __USE_MISC |
23396375 UD |
117 | /* Reasonable value for the buffer sized used in the reentrant |
118 | functions below. But better use `sysconf'. */ | |
dfd2257a UD |
119 | # define NSS_BUFLEN_GROUP 1024 |
120 | # endif | |
23396375 UD |
121 | |
122 | /* Reentrant versions of some of the functions above. | |
123 | ||
84384f5b UD |
124 | PLEASE NOTE: the `getgrent_r' function is not (yet) standardized. |
125 | The interface may change in later versions of this library. But | |
126 | the interface is designed following the principals used for the | |
127 | other reentrant functions so the chances are good this is what the | |
2c008571 UD |
128 | POSIX people would choose. |
129 | ||
130 | This function is not part of POSIX and therefore no official | |
131 | cancellation point. But due to similarity with an POSIX interface | |
132 | or due to the implementation it is a cancellation point and | |
133 | therefore not marked with __THROW. */ | |
23396375 | 134 | |
0ed99ce4 | 135 | # ifdef __USE_GNU |
c1422e5b UD |
136 | extern int getgrent_r (struct group *__restrict __resultbuf, |
137 | char *__restrict __buffer, size_t __buflen, | |
2c008571 | 138 | struct group **__restrict __result); |
dfd2257a | 139 | # endif |
23396375 | 140 | |
2c008571 UD |
141 | /* Search for an entry with a matching group ID. |
142 | ||
143 | This function is a possible cancellation point and therefore not | |
144 | marked with __THROW. */ | |
c1422e5b UD |
145 | extern int getgrgid_r (__gid_t __gid, struct group *__restrict __resultbuf, |
146 | char *__restrict __buffer, size_t __buflen, | |
2c008571 UD |
147 | struct group **__restrict __result); |
148 | ||
149 | /* Search for an entry with a matching group name. | |
23396375 | 150 | |
2c008571 UD |
151 | This function is a possible cancellation point and therefore not |
152 | marked with __THROW. */ | |
a784e502 | 153 | extern int getgrnam_r (const char *__restrict __name, |
c1422e5b UD |
154 | struct group *__restrict __resultbuf, |
155 | char *__restrict __buffer, size_t __buflen, | |
2c008571 | 156 | struct group **__restrict __result); |
23396375 | 157 | |
dfd2257a | 158 | # ifdef __USE_SVID |
84384f5b | 159 | /* Read a group entry from STREAM. This function is not standardized |
2c008571 UD |
160 | an probably never will. |
161 | ||
162 | This function is not part of POSIX and therefore no official | |
163 | cancellation point. But due to similarity with an POSIX interface | |
164 | or due to the implementation it is a cancellation point and | |
165 | therefore not marked with __THROW. */ | |
c1422e5b UD |
166 | extern int fgetgrent_r (FILE *__restrict __stream, |
167 | struct group *__restrict __resultbuf, | |
168 | char *__restrict __buffer, size_t __buflen, | |
2c008571 | 169 | struct group **__restrict __result); |
dfd2257a | 170 | # endif |
a8922de8 | 171 | |
9d187dd4 | 172 | #endif /* POSIX or reentrant */ |
23396375 | 173 | |
28f540f4 RM |
174 | |
175 | #ifdef __USE_BSD | |
176 | ||
dfd2257a UD |
177 | # define __need_size_t |
178 | # include <stddef.h> | |
28f540f4 RM |
179 | |
180 | /* Set the group set for the current user to GROUPS (N of them). */ | |
a784e502 | 181 | extern int setgroups (size_t __n, const __gid_t *__groups) __THROW; |
28f540f4 | 182 | |
8fee1bb0 UD |
183 | /* Store at most *NGROUPS members of the group set for USER into |
184 | *GROUPS. Also include GROUP. The actual number of groups found is | |
2c008571 UD |
185 | returned in *NGROUPS. Return -1 if the if *NGROUPS is too small. |
186 | ||
187 | This function is not part of POSIX and therefore no official | |
188 | cancellation point. But due to similarity with an POSIX interface | |
189 | or due to the implementation it is a cancellation point and | |
190 | therefore not marked with __THROW. */ | |
a784e502 | 191 | extern int getgrouplist (const char *__user, __gid_t __group, |
2c008571 | 192 | __gid_t *__groups, int *__ngroups); |
8fee1bb0 | 193 | |
28f540f4 RM |
194 | /* Initialize the group set for the current user |
195 | by reading the group database and using all groups | |
2c008571 UD |
196 | of which USER is a member. Also include GROUP. |
197 | ||
198 | This function is not part of POSIX and therefore no official | |
199 | cancellation point. But due to similarity with an POSIX interface | |
200 | or due to the implementation it is a cancellation point and | |
201 | therefore not marked with __THROW. */ | |
a784e502 | 202 | extern int initgroups (const char *__user, __gid_t __group); |
28f540f4 RM |
203 | |
204 | #endif /* Use BSD. */ | |
205 | ||
206 | __END_DECLS | |
207 | ||
208 | #endif /* grp.h */ |