Remove 'grp' and merge into 'nss' and 'posix'

The majority of grp routines are entry points for nss functionality.
This commit removes the 'grp' subdirectory and moves all nss-relevant
functionality and all tests to 'nss', and the 'setgroups' stub into
'posix' (alongside the 'getgroups' stub).  References to grp/ are
accordingly changed.  In addition, compat-initgroups.c, a fallback
implementation of initgroups is renamed to initgroups-fallback.c so that
the build system does not confuse it for nss_compat/compat-initgroups.c.

Build time improves very slightly; e.g. down from an average of 45.5s to
44.5s on an 8-thread mobile x86_64 CPU.
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

1 files changed, 0 insertions, 207 deletions

diff --git a/grp/grp.h b/grp/grp.h
deleted file mode 100644
index c889647..0000000
--- a/grp/grp.h
+++ /dev/null
@@ -1,207 +0,0 @@
-/* Copyright (C) 1991-2023 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
-   <https://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.	*/
-  };
-
-
-#ifdef __USE_MISC
-# include <bits/types/FILE.h>
-#endif
-
-
-#if defined __USE_MISC || 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_MISC
-/* 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);
-
-#ifdef __USE_POSIX
-
-# 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)
-	__attr_access ((__write_only__, 2, 3));
-# 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)
-	__attr_access ((__write_only__, 3, 4));
-
-/* 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)
-	__attr_access ((__write_only__, 3, 4));
-
-# ifdef	__USE_MISC
-/* 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)
-	__attr_access ((__write_only__, 3, 4));
-# endif
-
-#endif	/* POSIX or reentrant */
-
-
-#ifdef	__USE_MISC
-
-# define __need_size_t
-# include <stddef.h>
-
-/* Set the group set for the current user to GROUPS (N of them).  */
-extern int setgroups (size_t __n, const __gid_t *__groups) __THROW;
-
-/* 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.
-
-   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);
-
-/* 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 misc.  */
-
-__END_DECLS
-
-#endif /* grp.h  */