Remove --enable-obsolete-nsl configure flag

this means that *always* libnsl is only built as shared library for
backward compatibility and the NSS modules libnss_nis and libnss_nisplus
are not built at all, libnsl's headers aren't installed.

This compatibility is kept only for architectures and ABIs that have
been added in or before version 2.28.

Replacement implementations based on TIRPC, which additionally support
IPv6, are available from <https://github.com/thkukuk/>.

This change does not affect libnss_compat which does not depended
on libnsl since 2.27 and thus can be used without NIS.

libnsl code depends on Sun RPC, e.g. on --enable-obsolete-rpc (installed
libnsl headers use installed Sun RPC headers), which will be removed in
the following commit.

1 files changed, 0 insertions, 337 deletions

diff --git a/nis/nss_nisplus/nisplus-alias.c b/nis/nss_nisplus/nisplus-alias.c
deleted file mode 100644
index d938763ac9..0000000000
--- a/nis/nss_nisplus/nisplus-alias.c
+++ /dev/null
@@ -1,337 +0,0 @@
-/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
-
-   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 <atomic.h>
-#include <nss.h>
-#include <errno.h>
-#include <ctype.h>
-#include <string.h>
-#include <aliases.h>
-#include <libc-lock.h>
-#include <rpcsvc/nis.h>
-
-#include "nss-nisplus.h"
-
-__libc_lock_define_initialized (static, lock)
-
-static nis_result *result;
-static u_long next_entry;
-static nis_name tablename_val;
-static size_t tablename_len;
-
-#define NISENTRYVAL(idx, col, res) \
-        (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
-
-#define NISENTRYLEN(idx, col, res) \
-        (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
-
-static enum nss_status
-_nss_create_tablename (int *errnop)
-{
-  if (tablename_val == NULL)
-    {
-      const char *local_dir = nis_local_directory ();
-      size_t local_dir_len = strlen (local_dir);
-      static const char prefix[] = "mail_aliases.org_dir.";
-
-      char *p = malloc (sizeof (prefix) + local_dir_len);
-      if (p == NULL)
-	{
-	  *errnop = errno;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-
-      memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1);
-
-      tablename_len = sizeof (prefix) - 1 + local_dir_len;
-
-      atomic_write_barrier ();
-
-      tablename_val = p;
-    }
-
-  return NSS_STATUS_SUCCESS;
-}
-
-static int
-_nss_nisplus_parse_aliasent (nis_result *result, unsigned long entry,
-			     struct aliasent *alias, char *buffer,
-			     size_t buflen, int *errnop)
-{
-  if (result == NULL)
-    return 0;
-
-  if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
-      || __type_of (&NIS_RES_OBJECT (result)[entry]) != NIS_ENTRY_OBJ
-      || strcmp (NIS_RES_OBJECT (result)[entry].EN_data.en_type,
-		 "mail_aliases") != 0
-      || NIS_RES_OBJECT (result)[entry].EN_data.en_cols.en_cols_len < 2)
-    return 0;
-
-  if (NISENTRYLEN (entry, 1, result) >= buflen)
-    {
-      /* The line is too long for our buffer.  */
-    no_more_room:
-      *errnop = ERANGE;
-      return -1;
-    }
-
-  char *cp = __stpncpy (buffer, NISENTRYVAL (entry, 1, result),
-			NISENTRYLEN (entry, 1, result));
-  *cp = '\0';
-
-  char *first_unused = cp + 1;
-  size_t room_left = buflen - (first_unused - buffer);
-
-  alias->alias_local = 0;
-  alias->alias_members_len = 0;
-
-  if (NISENTRYLEN (entry, 0, result) >= room_left)
-    goto no_more_room;
-
-  cp = __stpncpy (first_unused, NISENTRYVAL (entry, 0, result),
-		  NISENTRYLEN (entry, 0, result));
-  *cp = '\0';
-  alias->alias_name = first_unused;
-
-  /* Terminate the line for any case.  */
-  cp = strpbrk (alias->alias_name, "#\n");
-  if (cp != NULL)
-    *cp = '\0';
-
-  size_t len = strlen (alias->alias_name) + 1;
-  first_unused += len;
-  room_left -= len;
-
-  /* Adjust the pointer so it is aligned for
-     storing pointers.  */
-  size_t adjust = ((__alignof__ (char *)
-		    - (first_unused - (char *) 0) % __alignof__ (char *))
-		   % __alignof__ (char *));
-  if (room_left < adjust)
-    goto no_more_room;
-  first_unused += adjust;
-  room_left -= adjust;
-
-  alias->alias_members = (char **) first_unused;
-
-  char *line = buffer;
-  while (*line != '\0')
-    {
-      /* Skip leading blanks.  */
-      while (isspace (*line))
-	++line;
-
-      if (*line == '\0')
-	break;
-
-      if (room_left < sizeof (char *))
-	goto no_more_room;
-      room_left -= sizeof (char *);
-      alias->alias_members[alias->alias_members_len] = line;
-
-      while (*line != '\0' && *line != ',')
-	++line;
-
-      if (line != alias->alias_members[alias->alias_members_len])
-	{
-	  *line++ = '\0';
-	  ++alias->alias_members_len;
-	}
-      else if (*line == ',')
-	++line;
-    }
-
-  return alias->alias_members_len == 0 ? 0 : 1;
-}
-
-static enum nss_status
-internal_setaliasent (void)
-{
-  enum nss_status status;
-  int err;
-
-  if (result !=  NULL)
-    {
-      nis_freeresult (result);
-      result = NULL;
-    }
-
-  if (_nss_create_tablename (&err) != NSS_STATUS_SUCCESS)
-    return NSS_STATUS_UNAVAIL;
-
-  next_entry = 0;
-  result = nis_list (tablename_val, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
-  if (result == NULL)
-    {
-      status = NSS_STATUS_TRYAGAIN;
-      __set_errno (ENOMEM);
-    }
-  else
-    {
-      status = niserr2nss (result->status);
-      if (status != NSS_STATUS_SUCCESS)
-	{
-	  nis_freeresult (result);
-	  result = NULL;
-	}
-    }
-  return status;
-}
-
-enum nss_status
-_nss_nisplus_setaliasent (void)
-{
-  enum nss_status status;
-
-  __libc_lock_lock (lock);
-
-  status = internal_setaliasent ();
-
-  __libc_lock_unlock (lock);
-
-  return status;
-}
-
-enum nss_status
-_nss_nisplus_endaliasent (void)
-{
-  __libc_lock_lock (lock);
-
-  if (result != NULL)
-    {
-      nis_freeresult (result);
-      result = NULL;
-    }
-  next_entry = 0;
-
-  __libc_lock_unlock (lock);
-
-  return NSS_STATUS_SUCCESS;
-}
-
-static enum nss_status
-internal_nisplus_getaliasent_r (struct aliasent *alias,
-				char *buffer, size_t buflen, int *errnop)
-{
-  int parse_res;
-
-  if (result == NULL)
-    {
-      enum nss_status status;
-
-      status = internal_setaliasent ();
-      if (result == NULL || status != NSS_STATUS_SUCCESS)
-	return status;
-    }
-
-  /* Get the next entry until we found a correct one. */
-  do
-    {
-      if (next_entry >= result->objects.objects_len)
-	return NSS_STATUS_NOTFOUND;
-
-      parse_res = _nss_nisplus_parse_aliasent (result, next_entry, alias,
-					       buffer, buflen, errnop);
-      if (parse_res == -1)
-	return NSS_STATUS_TRYAGAIN;
-
-      ++next_entry;
-    }
-  while (!parse_res);
-
-  return NSS_STATUS_SUCCESS;
-}
-
-enum nss_status
-_nss_nisplus_getaliasent_r (struct aliasent *result, char *buffer,
-			    size_t buflen, int *errnop)
-{
-  int status;
-
-  __libc_lock_lock (lock);
-
-  status = internal_nisplus_getaliasent_r (result, buffer, buflen, errnop);
-
-  __libc_lock_unlock (lock);
-
-  return status;
-}
-
-enum nss_status
-_nss_nisplus_getaliasbyname_r (const char *name, struct aliasent *alias,
-			    char *buffer, size_t buflen, int *errnop)
-{
-  int parse_res;
-
-  if (tablename_val == NULL)
-    {
-      __libc_lock_lock (lock);
-
-      enum nss_status status = _nss_create_tablename (errnop);
-
-      __libc_lock_unlock (lock);
-
-      if (status != NSS_STATUS_SUCCESS)
-	return status;
-    }
-
-  if (name == NULL)
-    {
-      *errnop = EINVAL;
-      return NSS_STATUS_UNAVAIL;
-    }
-
-  char buf[strlen (name) + 9 + tablename_len];
-  int olderr = errno;
-
-  snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val);
-
-  nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
-
-  if (result == NULL)
-    {
-      *errnop = ENOMEM;
-      return NSS_STATUS_TRYAGAIN;
-    }
-
-  if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS))
-    {
-      enum nss_status status = niserr2nss (result->status);
-      nis_freeresult (result);
-      return status;
-    }
-
-  parse_res = _nss_nisplus_parse_aliasent (result, 0, alias,
-					   buffer, buflen, errnop);
-
-  /* We do not need the lookup result anymore.  */
-  nis_freeresult (result);
-
-  if (__glibc_unlikely (parse_res < 1))
-    {
-      __set_errno (olderr);
-
-      if (parse_res == -1)
-	return NSS_STATUS_TRYAGAIN;
-      else
-	return NSS_STATUS_NOTFOUND;
-    }
-
-  return NSS_STATUS_SUCCESS;
-}