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, 281 deletions

diff --git a/nis/nss_nis/nis-alias.c b/nis/nss_nis/nis-alias.c
deleted file mode 100644
index b8f83b94b7..0000000000
--- a/nis/nss_nis/nis-alias.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1996.
-
-   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 <nss.h>
-#include <ctype.h>
-#include <errno.h>
-#include <string.h>
-#include <aliases.h>
-#include <libc-lock.h>
-#include <rpcsvc/yp.h>
-#include <rpcsvc/ypclnt.h>
-
-#include "nss-nis.h"
-
-__libc_lock_define_initialized (static, lock)
-
-static bool_t new_start = 1;
-static char *oldkey;
-static int oldkeylen;
-
-static int
-_nss_nis_parse_aliasent (const char *key, char *alias, struct aliasent *result,
-			 char *buffer, size_t buflen, int *errnop)
-{
-  char *first_unused = buffer + strlen (alias) + 1;
-  size_t room_left =
-    buflen - (buflen % __alignof__ (char *)) - strlen (alias) - 2;
-  char *line;
-  char *cp;
-
-  result->alias_members_len = 0;
-  *first_unused = '\0';
-  first_unused++;
-  strcpy (first_unused, key);
-
-  if (first_unused[room_left - 1] != '\0')
-    {
-      /* The line is too long for our buffer.  */
-    no_more_room:
-      *errnop = ERANGE;
-      return -1;
-    }
-
-  result->alias_name = first_unused;
-
-  /* Terminate the line for any case.  */
-  cp = strpbrk (alias, "#\n");
-  if (cp != NULL)
-    *cp = '\0';
-
-  first_unused += strlen (result->alias_name) + 1;
-  /* Adjust the pointer so it is aligned for
-     storing pointers.  */
-  first_unused += __alignof__ (char *) - 1;
-  first_unused -= ((first_unused - (char *) 0) % __alignof__ (char *));
-  result->alias_members = (char **) first_unused;
-
-  line = alias;
-
-  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 *);
-      result->alias_members[result->alias_members_len] = line;
-
-      while (*line != '\0' && *line != ',')
-	line++;
-
-      if (line != result->alias_members[result->alias_members_len])
-	{
-	  *line = '\0';
-	  line++;
-	  result->alias_members_len++;
-	}
-    }
-  return result->alias_members_len == 0 ? 0 : 1;
-}
-
-enum nss_status
-_nss_nis_setaliasent (void)
-{
-  __libc_lock_lock (lock);
-
-  new_start = 1;
-  if (oldkey != NULL)
-    {
-      free (oldkey);
-      oldkey = NULL;
-      oldkeylen = 0;
-    }
-
-  __libc_lock_unlock (lock);
-
-  return NSS_STATUS_SUCCESS;
-}
-/* The 'endaliasent' function is identical.  */
-strong_alias (_nss_nis_setaliasent, _nss_nis_endaliasent)
-
-static enum nss_status
-internal_nis_getaliasent_r (struct aliasent *alias, char *buffer,
-			    size_t buflen, int *errnop)
-{
-  char *domain;
-
-  if (__glibc_unlikely (yp_get_default_domain (&domain)))
-    return NSS_STATUS_UNAVAIL;
-
-  alias->alias_local = 0;
-
-  /* Get the next entry until we found a correct one. */
-  int parse_res;
-  do
-    {
-      char *result;
-      int len;
-      char *outkey;
-      int keylen;
-      int yperr;
-
-      if (new_start)
-	yperr = yp_first (domain, "mail.aliases", &outkey, &keylen, &result,
-			  &len);
-      else
-	yperr = yp_next (domain, "mail.aliases", oldkey, oldkeylen, &outkey,
-			 &keylen, &result, &len);
-
-      if (__glibc_unlikely (yperr != YPERR_SUCCESS))
-	{
-	  enum nss_status retval = yperr2nss (yperr);
-
-	  if (retval == NSS_STATUS_TRYAGAIN)
-	    *errnop = errno;
-	  return retval;
-	}
-
-      if (__glibc_unlikely ((size_t) (len + 1) > buflen))
-	{
-	  free (result);
-	  *errnop = ERANGE;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-      char *p = strncpy (buffer, result, len);
-      buffer[len] = '\0';
-      while (isspace (*p))
-	++p;
-      free (result);
-
-      parse_res = _nss_nis_parse_aliasent (outkey, p, alias, buffer,
-					   buflen, errnop);
-      if (__glibc_unlikely (parse_res == -1))
-	{
-	  free (outkey);
-	  *errnop = ERANGE;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-
-      free (oldkey);
-      oldkey = outkey;
-      oldkeylen = keylen;
-      new_start = 0;
-    }
-  while (!parse_res);
-
-  return NSS_STATUS_SUCCESS;
-}
-
-enum nss_status
-_nss_nis_getaliasent_r (struct aliasent *alias, char *buffer, size_t buflen,
-			int *errnop)
-{
-  enum nss_status status;
-
-  __libc_lock_lock (lock);
-
-  status = internal_nis_getaliasent_r (alias, buffer, buflen, errnop);
-
-  __libc_lock_unlock (lock);
-
-  return status;
-}
-
-enum nss_status
-_nss_nis_getaliasbyname_r (const char *name, struct aliasent *alias,
-			   char *buffer, size_t buflen, int *errnop)
-{
-  if (name == NULL)
-    {
-      *errnop = EINVAL;
-      return NSS_STATUS_UNAVAIL;
-    }
-
-  char *domain;
-  if (__glibc_unlikely (yp_get_default_domain (&domain)))
-    return NSS_STATUS_UNAVAIL;
-
-  size_t namlen = strlen (name);
-  char *name2;
-  int use_alloca = __libc_use_alloca (namlen + 1);
-  if (use_alloca)
-    name2 = __alloca (namlen + 1);
-  else
-    {
-      name2 = malloc (namlen + 1);
-      if (name2 == NULL)
-	{
-	  *errnop = ENOMEM;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-    }
-
-  /* Convert name to lowercase.  */
-  size_t i;
-  for (i = 0; i < namlen; ++i)
-    name2[i] = _tolower (name[i]);
-  name2[i] = '\0';
-
-  char *result;
-  int len;
-  int yperr = yp_match (domain, "mail.aliases", name2, namlen, &result, &len);
-
-  if (!use_alloca)
-    free (name2);
-
-  if (__glibc_unlikely (yperr != YPERR_SUCCESS))
-    {
-      enum nss_status retval = yperr2nss (yperr);
-
-      if (retval == NSS_STATUS_TRYAGAIN)
-	*errnop = errno;
-      return retval;
-    }
-
-  if (__glibc_unlikely ((size_t) (len + 1) > buflen))
-    {
-      free (result);
-      *errnop = ERANGE;
-      return NSS_STATUS_TRYAGAIN;
-    }
-
-  char *p = strncpy (buffer, result, len);
-  buffer[len] = '\0';
-  while (isspace (*p))
-    ++p;
-  free (result);
-
-  alias->alias_local = 0;
-  int parse_res = _nss_nis_parse_aliasent (name, p, alias, buffer, buflen,
-					   errnop);
-  if (__glibc_unlikely (parse_res < 1))
-    {
-      if (parse_res == -1)
-	return NSS_STATUS_TRYAGAIN;
-      else
-	return NSS_STATUS_NOTFOUND;
-    }
-
-  return NSS_STATUS_SUCCESS;
-}