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- /* Copyright (C) 1991,1992,1995-2001,2003,2004 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 Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 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
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
- /*
- * POSIX Standard: 9.2.1 Group Database Access <grp.h>
- */
- #ifndef _GRP_H
- #define _GRP_H 1
- #include <features.h>
- __BEGIN_DECLS
- #include <bits/types.h>
- #define __need_size_t
- #include <stddef.h>
- /* For the Single Unix specification we must define this type here. */
- #if (defined __USE_XOPEN || defined __USE_XOPEN2K) && !defined __gid_t_defined
- typedef __gid_t gid_t;
- # define __gid_t_defined
- #endif
- /* 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
- #if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
- /* Rewind the group-file stream.
- This function is a possible cancellation point and therefore not
- marked with __THROW. */
- extern void setgrent (void);
- /* Close the group-file stream.
- This function is a possible cancellation point and therefore not
- marked with __THROW. */
- extern void endgrent (void);
- /* Read an entry from the group-file stream, opening it if necessary.
- This function is a possible cancellation point and therefore not
- marked with __THROW. */
- extern struct group *getgrent (void);
- #endif
- #ifdef __USE_SVID
- /* Read a group entry from STREAM.
- This function is not part of POSIX and therefore no official
- cancellation point. But due to similarity with an POSIX interface
- or due to the implementation it is a cancellation point and
- therefore not marked with __THROW. */
- extern struct group *fgetgrent (FILE *__stream);
- #endif
- #ifdef __USE_GNU
- /* Write the given entry onto the given stream.
- This function is not part of POSIX and therefore no official
- cancellation point. But due to similarity with an POSIX interface
- or due to the implementation it is a cancellation point and
- therefore not marked with __THROW. */
- extern int putgrent (const struct group *__restrict __p,
- FILE *__restrict __f);
- #endif
- /* Search for an entry with a matching group ID.
- This function is a possible cancellation point and therefore not
- marked with __THROW. */
- extern struct group *getgrgid (__gid_t __gid);
- /* Search for an entry with a matching group name.
- This function is a possible cancellation point and therefore not
- marked with __THROW. */
- extern struct group *getgrnam (const char *__name);
- #if defined __USE_POSIX || defined __USE_MISC
- # ifdef __USE_MISC
- /* Reasonable value for the buffer sized used in the reentrant
- functions below. But better use `sysconf'. */
- # define NSS_BUFLEN_GROUP 1024
- # endif
- /* Reentrant versions of some of the functions above.
- PLEASE NOTE: the `getgrent_r' function is not (yet) standardized.
- The interface may change in later versions of this library. But
- the interface is designed following the principals used for the
- other reentrant functions so the chances are good this is what the
- POSIX people would choose.
- This function is not part of POSIX and therefore no official
- cancellation point. But due to similarity with an POSIX interface
- or due to the implementation it is a cancellation point and
- therefore not marked with __THROW. */
- # ifdef __USE_GNU
- extern int getgrent_r (struct group *__restrict __resultbuf,
- char *__restrict __buffer, size_t __buflen,
- struct group **__restrict __result);
- libc_hidden_proto(getgrent_r)
- # endif
- /* Search for an entry with a matching group ID.
- This function is a possible cancellation point and therefore not
- marked with __THROW. */
- extern int getgrgid_r (__gid_t __gid, struct group *__restrict __resultbuf,
- char *__restrict __buffer, size_t __buflen,
- struct group **__restrict __result);
- libc_hidden_proto(getgrgid_r)
- /* Search for an entry with a matching group name.
- This function is a possible cancellation point and therefore not
- marked with __THROW. */
- extern int getgrnam_r (const char *__restrict __name,
- struct group *__restrict __resultbuf,
- char *__restrict __buffer, size_t __buflen,
- struct group **__restrict __result);
- libc_hidden_proto(getgrnam_r)
- # ifdef __USE_SVID
- /* Read a group entry from STREAM. This function is not standardized
- an probably never will.
- This function is not part of POSIX and therefore no official
- cancellation point. But due to similarity with an POSIX interface
- or due to the implementation it is a cancellation point and
- therefore not marked with __THROW. */
- extern int fgetgrent_r (FILE *__restrict __stream,
- struct group *__restrict __resultbuf,
- char *__restrict __buffer, size_t __buflen,
- struct group **__restrict __result);
- libc_hidden_proto(fgetgrent_r)
- # endif
- #endif /* POSIX or reentrant */
- #if defined __USE_BSD || defined __USE_GNU
- # define __need_size_t
- # include <stddef.h>
- /* Store at most *NGROUPS members of the group set for USER into
- *GROUPS. Also include GROUP. The actual number of groups found is
- returned in *NGROUPS. Return -1 if the if *NGROUPS is too small.
- In all cases the actual number of groups is stored in *NGROUPS.
- This function is not part of POSIX and therefore no official
- cancellation point. But due to similarity with an POSIX interface
- or due to the implementation it is a cancellation point and
- therefore not marked with __THROW. */
- extern int getgrouplist (const char *__user, __gid_t __group,
- __gid_t *__groups, int *__ngroups);
- #endif
- #if defined __USE_BSD
- /* Set the group set for the current user to GROUPS (N of them). */
- extern int setgroups (size_t __n, const __gid_t *__groups) __THROW;
- libc_hidden_proto(setgroups)
- /* 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.
- This function is not part of POSIX and therefore no official
- cancellation point. But due to similarity with an POSIX interface
- or due to the implementation it is a cancellation point and
- therefore not marked with __THROW. */
- extern int initgroups (const char *__user, __gid_t __group);
- #endif /* Use BSD. */
- __END_DECLS
- #endif /* grp.h */
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