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, 76 deletions

diff --git a/grp/putgrent.c b/grp/putgrent.c
deleted file mode 100644
index 93caea5..0000000
--- a/grp/putgrent.c
+++ /dev/null
@@ -1,76 +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/>.  */
-
-#include <errno.h>
-#include <nss.h>
-#include <stdio.h>
-#include <string.h>
-#include <grp.h>
-
-#define flockfile(s) _IO_flockfile (s)
-#define funlockfile(s) _IO_funlockfile (s)
-
-#define _S(x)	x ? x : ""
-
-/* Write an entry to the given stream.
-   This must know the format of the group file.  */
-int
-putgrent (const struct group *gr, FILE *stream)
-{
-  int retval;
-
-  if (__glibc_unlikely (gr == NULL) || __glibc_unlikely (stream == NULL)
-      || gr->gr_name == NULL || !__nss_valid_field (gr->gr_name)
-      || !__nss_valid_field (gr->gr_passwd)
-      || !__nss_valid_list_field (gr->gr_mem))
-    {
-      __set_errno (EINVAL);
-      return -1;
-    }
-
-  flockfile (stream);
-
-  if (gr->gr_name[0] == '+' || gr->gr_name[0] == '-')
-    retval = fprintf (stream, "%s:%s::",
-		      gr->gr_name, _S (gr->gr_passwd));
-  else
-    retval = fprintf (stream, "%s:%s:%lu:",
-		      gr->gr_name, _S (gr->gr_passwd),
-		      (unsigned long int) gr->gr_gid);
-  if (__builtin_expect (retval, 0) < 0)
-    {
-      funlockfile (stream);
-      return -1;
-    }
-
-  if (gr->gr_mem != NULL)
-    {
-      for (size_t i = 0; gr->gr_mem[i] != NULL; i++)
-	if (fprintf (stream, i == 0 ? "%s" : ",%s", gr->gr_mem[i]) < 0)
-	  {
-	    /* What else can we do?  */
-	    funlockfile (stream);
-	    return -1;
-	  }
-    }
-
-  retval = fputc_unlocked ('\n', stream);
-
-  funlockfile (stream);
-
-  return retval < 0 ? -1 : 0;
-}