1 /* vi: set sw=4 ts=4: */
2 /* Copyright (C) 1991,92,95,96,97,98,99,2000,01 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
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.
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
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 * POSIX Standard: 9.2.1 Group Database Access <grp.h>
27 #if __GNUC_PREREQ(4,1)
28 # pragma GCC visibility push(hidden)
31 /* The group structure. */
33 char *gr_name; /* Group name. */
34 char *gr_passwd; /* Password. */
35 gid_t gr_gid; /* Group ID. */
36 char **gr_mem; /* Member list. */
40 #define setgrent bb_internal_setgrent
41 #define endgrent bb_internal_endgrent
42 #define getgrent bb_internal_getgrent
43 #define fgetgrent bb_internal_fgetgrent
44 #define putgrent bb_internal_putgrent
45 #define getgrgid bb_internal_getgrgid
46 #define getgrnam bb_internal_getgrnam
47 #define getgrent_r bb_internal_getgrent_r
48 #define getgrgid_r bb_internal_getgrgid_r
49 #define getgrnam_r bb_internal_getgrnam_r
50 #define fgetgrent_r bb_internal_fgetgrent_r
51 #define getgrouplist bb_internal_getgrouplist
52 #define initgroups bb_internal_initgroups
55 /* All function names below should be remapped by #defines above
56 * in order to not collide with libc names.
57 * In theory it isn't necessary, but I saw weird interactions at link time.
61 /* Rewind the group-file stream. */
62 extern void setgrent(void);
64 /* Close the group-file stream. */
65 extern void endgrent(void);
67 /* Read an entry from the group-file stream, opening it if necessary. */
68 extern struct group *getgrent(void);
70 /* Read a group entry from STREAM. */
71 extern struct group *fgetgrent(FILE *__stream);
73 /* Write the given entry onto the given stream. */
74 extern int putgrent(__const struct group *__restrict __p,
75 FILE *__restrict __f);
77 /* Search for an entry with a matching group ID. */
78 extern struct group *getgrgid(gid_t __gid);
80 /* Search for an entry with a matching group name. */
81 extern struct group *getgrnam(__const char *__name);
83 /* Reentrant versions of some of the functions above.
85 PLEASE NOTE: the `getgrent_r' function is not (yet) standardized.
86 The interface may change in later versions of this library. But
87 the interface is designed following the principals used for the
88 other reentrant functions so the chances are good this is what the
89 POSIX people would choose. */
91 extern int getgrent_r(struct group *__restrict __resultbuf,
92 char *__restrict __buffer, size_t __buflen,
93 struct group **__restrict __result);
95 /* Search for an entry with a matching group ID. */
96 extern int getgrgid_r(gid_t __gid, struct group *__restrict __resultbuf,
97 char *__restrict __buffer, size_t __buflen,
98 struct group **__restrict __result);
100 /* Search for an entry with a matching group name. */
101 extern int getgrnam_r(__const char *__restrict __name,
102 struct group *__restrict __resultbuf,
103 char *__restrict __buffer, size_t __buflen,
104 struct group **__restrict __result);
106 /* Read a group entry from STREAM. This function is not standardized
107 an probably never will. */
108 extern int fgetgrent_r(FILE *__restrict __stream,
109 struct group *__restrict __resultbuf,
110 char *__restrict __buffer, size_t __buflen,
111 struct group **__restrict __result);
113 /* Store at most *NGROUPS members of the group set for USER into
114 *GROUPS. Also include GROUP. The actual number of groups found is
115 returned in *NGROUPS. Return -1 if the if *NGROUPS is too small. */
116 extern int getgrouplist(__const char *__user, gid_t __group,
117 gid_t *__groups, int *__ngroups);
119 /* Initialize the group set for the current user
120 by reading the group database and using all groups
121 of which USER is a member. Also include GROUP. */
122 extern int initgroups(__const char *__user, gid_t __group);
124 #if __GNUC_PREREQ(4,1)
125 # pragma GCC visibility pop