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, 584 deletions

diff --git a/nis/nss_nisplus/nisplus-hosts.c b/nis/nss_nisplus/nisplus-hosts.c
deleted file mode 100644
index 1e66e4f..0000000
--- a/nis/nss_nisplus/nisplus-hosts.c
+++ /dev/null
@@ -1,584 +0,0 @@
-/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Thorsten Kukuk <kukuk@suse.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 <assert.h>
-#include <atomic.h>
-#include <ctype.h>
-#include <errno.h>
-#include <netdb.h>
-#include <nss.h>
-#include <string.h>
-#include <arpa/inet.h>
-#include <netinet/in.h>
-#include <rpcsvc/nis.h>
-#include <libc-lock.h>
-
-#include "nss-nisplus.h"
-
-__libc_lock_define_initialized (static, lock)
-
-static nis_result *result;
-static nis_name tablename_val;
-static u_long 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 int
-_nss_nisplus_parse_hostent (nis_result *result, int af, struct hostent *host,
-			    char *buffer, size_t buflen, int *errnop)
-{
-  unsigned int i;
-  char *first_unused = buffer;
-  size_t room_left = buflen;
-
-  if (result == NULL)
-    return 0;
-
-  if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
-      || __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
-      || strcmp (NIS_RES_OBJECT (result)[0].EN_data.en_type, "hosts_tbl") != 0
-      || NIS_RES_OBJECT (result)[0].EN_data.en_cols.en_cols_len < 4)
-    return 0;
-
-  char *data = first_unused;
-
-  if (room_left < (af != AF_INET ? IN6ADDRSZ : INADDRSZ))
-    {
-    no_more_room:
-      *errnop = ERANGE;
-      return -1;
-    }
-
-  /* Parse address.  */
-  if (af != AF_INET6
-      && inet_pton (AF_INET, NISENTRYVAL (0, 2, result), data) > 0)
-    {
-      host->h_addrtype = AF_INET;
-      host->h_length = INADDRSZ;
-    }
-  else if (af != AF_INET
-	   && inet_pton (AF_INET6, NISENTRYVAL (0, 2, result), data) > 0)
-    {
-      host->h_addrtype = AF_INET6;
-      host->h_length = IN6ADDRSZ;
-    }
-  else
-    /* Illegal address: ignore line.  */
-    return 0;
-
-  first_unused += host->h_length;
-  room_left -= host->h_length;
-
-  if (NISENTRYLEN (0, 0, result) + 1 > room_left)
-    goto no_more_room;
-
-  host->h_name = first_unused;
-  first_unused = __stpncpy (first_unused, NISENTRYVAL (0, 0, result),
-			    NISENTRYLEN (0, 0, result));
-  *first_unused++ = '\0';
-
-  room_left -= NISENTRYLEN (0, 0, result) + 1;
-  char *line = first_unused;
-
-  /* When this is a call to gethostbyname4_r we do not need the aliases.  */
-  if (af != AF_UNSPEC)
-    {
-      /* XXX Rewrite at some point to allocate the array first and then
-	 copy the strings.  It is wasteful to first concatenate the strings
-	 to just split them again later.  */
-      for (i = 0; i < NIS_RES_NUMOBJ (result); ++i)
-	{
-	  if (strcmp (NISENTRYVAL (i, 1, result), host->h_name) != 0)
-	    {
-	      if (NISENTRYLEN (i, 1, result) + 2 > room_left)
-		goto no_more_room;
-
-	      *first_unused++ = ' ';
-	      first_unused = __stpncpy (first_unused,
-					NISENTRYVAL (i, 1, result),
-					NISENTRYLEN (i, 1, result));
-	      *first_unused = '\0';
-	      room_left -= NISENTRYLEN (i, 1, result) + 1;
-	    }
-	}
-      *first_unused++ = '\0';
-    }
-
-  /* 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 + 3 * sizeof (char *))
-    goto no_more_room;
-  first_unused += adjust;
-  room_left -= adjust;
-  host->h_addr_list = (char **) first_unused;
-
-  room_left -= 3 * sizeof (char *);
-  host->h_addr_list[0] = data;
-  host->h_addr_list[1] = NULL;
-  host->h_aliases = &host->h_addr_list[2];
-
-  /* When this is a call to gethostbyname4_r we do not need the aliases.  */
-  if (af != AF_UNSPEC)
-    {
-      i = 0;
-      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 *);
-	  host->h_aliases[i++] = line;
-
-	  while (*line != '\0' && *line != ' ')
-	    ++line;
-
-	  if (*line == ' ')
-	    *line++ = '\0';
-	}
-
-      host->h_aliases[i] = NULL;
-    }
-
-  return 1;
-}
-
-
-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[] = "hosts.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;
-}
-
-
-enum nss_status
-_nss_nisplus_sethostent (int stayopen)
-{
-  enum nss_status status = NSS_STATUS_SUCCESS;
-  int err;
-
-  __libc_lock_lock (lock);
-
-  if (result != NULL)
-    {
-      nis_freeresult (result);
-      result = NULL;
-    }
-
-  if (tablename_val == NULL)
-    status = _nss_create_tablename (&err);
-
-  __libc_lock_unlock (lock);
-
-  return status;
-}
-
-
-enum nss_status
-_nss_nisplus_endhostent (void)
-{
-  __libc_lock_lock (lock);
-
-  if (result != NULL)
-    {
-      nis_freeresult (result);
-      result = NULL;
-    }
-
-  __libc_lock_unlock (lock);
-
-  return NSS_STATUS_SUCCESS;
-}
-
-
-static enum nss_status
-internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
-			       size_t buflen, int *errnop, int *herrnop)
-{
-  int parse_res;
-
-  /* Get the next entry until we found a correct one. */
-  do
-    {
-      nis_result *saved_res;
-
-      if (result == NULL)
-	{
-	  saved_res = NULL;
-	  if (tablename_val == NULL)
-	    {
-	      enum nss_status status = _nss_create_tablename (errnop);
-
-	      if (status != NSS_STATUS_SUCCESS)
-		return status;
-	    }
-
-	  result = nis_first_entry (tablename_val);
-	  if (result == NULL)
-	    {
-	      *errnop = errno;
-	      return NSS_STATUS_TRYAGAIN;
-	    }
-	  if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
-	    {
-	      enum nss_status retval = niserr2nss (result->status);
-	      if (retval == NSS_STATUS_TRYAGAIN)
-		{
-		  *herrnop = NETDB_INTERNAL;
-		  *errnop = errno;
-		}
-	      return retval;
-	    }
-
-	}
-      else
-	{
-	  saved_res = result;
-	  result = nis_next_entry (tablename_val, &result->cookie);
-	  if (result == NULL)
-	    {
-	      *errnop = errno;
-	      return NSS_STATUS_TRYAGAIN;
-	    }
-	  if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
-	    {
-	      enum nss_status retval= niserr2nss (result->status);
-
-	      nis_freeresult (result);
-	      result = saved_res;
-	      if (retval == NSS_STATUS_TRYAGAIN)
-		{
-		  *herrnop = NETDB_INTERNAL;
-		  *errnop = errno;
-		}
-	      return retval;
-	    }
-	}
-
-      parse_res = _nss_nisplus_parse_hostent (result, AF_INET, host, buffer,
-					      buflen, errnop);
-
-      if (parse_res == -1)
-	{
-	  nis_freeresult (result);
-	  result = saved_res;
-	  *herrnop = NETDB_INTERNAL;
-	  *errnop = ERANGE;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-      if (saved_res != NULL)
-	nis_freeresult (saved_res);
-
-    } while (!parse_res);
-
-  return NSS_STATUS_SUCCESS;
-}
-
-
-enum nss_status
-_nss_nisplus_gethostent_r (struct hostent *result, char *buffer,
-			   size_t buflen, int *errnop, int *herrnop)
-{
-  int status;
-
-  __libc_lock_lock (lock);
-
-  status = internal_nisplus_gethostent_r (result, buffer, buflen, errnop,
-					  herrnop);
-
-  __libc_lock_unlock (lock);
-
-  return status;
-}
-
-
-static enum nss_status
-get_tablename (int *herrnop)
-{
-  __libc_lock_lock (lock);
-
-  enum nss_status status = _nss_create_tablename (herrnop);
-
-  __libc_lock_unlock (lock);
-
-  if (status != NSS_STATUS_SUCCESS)
-    *herrnop = NETDB_INTERNAL;
-
-  return status;
-}
-
-
-static enum nss_status
-internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
-			   char *buffer, size_t buflen, int *errnop,
-			   int *herrnop)
-{
-  if (tablename_val == NULL)
-    {
-      enum nss_status status = get_tablename (herrnop);
-      if (status != NSS_STATUS_SUCCESS)
-	return status;
-    }
-
-  if (name == NULL)
-    {
-      *errnop = EINVAL;
-      *herrnop = NETDB_INTERNAL;
-      return NSS_STATUS_NOTFOUND;
-    }
-
-  char buf[strlen (name) + 10 + tablename_len];
-  int olderr = errno;
-
-  /* Search at first in the alias list, and use the correct name
-     for the next search.  */
-  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)
-    {
-      /* If we did not find it, try it as original name. But if the
-	 database is correct, we should find it in the first case, too.  */
-      char *bufptr = buf;
-      size_t buflen = sizeof (buf);
-
-      if ((result->status == NIS_SUCCESS || result->status == NIS_S_SUCCESS)
-	  && __type_of (result->objects.objects_val) == NIS_ENTRY_OBJ
-	  && strcmp (result->objects.objects_val->EN_data.en_type,
-		     "hosts_tbl") == 0
-	  && result->objects.objects_val->EN_data.en_cols.en_cols_len >= 3)
-	{
-	  /* We need to allocate a new buffer since there is no
-	     guarantee the returned alias name has a length limit.  */
-	  name = NISENTRYVAL(0, 0, result);
-	  size_t buflen = strlen (name) + 10 + tablename_len;
-	  bufptr = alloca (buflen);
-	}
-
-      snprintf (bufptr, buflen, "[cname=%s],%s", name, tablename_val);
-
-      nis_freeresult (result);
-      result = nis_list (bufptr, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
-    }
-
-  if (result == NULL)
-    {
-      *errnop = ENOMEM;
-      *herrnop = NETDB_INTERNAL;
-      return NSS_STATUS_TRYAGAIN;
-    }
-
-  int retval = niserr2nss (result->status);
-  if (__glibc_unlikely (retval != NSS_STATUS_SUCCESS))
-    {
-      if (retval == NSS_STATUS_TRYAGAIN)
-	{
-	  *errnop = errno;
-	  *herrnop = TRY_AGAIN;
-	}
-      else
-	{
-	  __set_errno (olderr);
-	  *herrnop = NETDB_INTERNAL;
-	}
-      nis_freeresult (result);
-      return retval;
-    }
-
-  int parse_res = _nss_nisplus_parse_hostent (result, af, host, buffer,
-					      buflen, errnop);
-
-  nis_freeresult (result);
-
-  if (parse_res > 0)
-    return NSS_STATUS_SUCCESS;
-
-  *herrnop = NETDB_INTERNAL;
-  if (parse_res == -1)
-    {
-      *errnop = ERANGE;
-      return NSS_STATUS_TRYAGAIN;
-    }
-
-  __set_errno (olderr);
-  return NSS_STATUS_NOTFOUND;
-}
-
-
-enum nss_status
-_nss_nisplus_gethostbyname2_r (const char *name, int af, struct hostent *host,
-			       char *buffer, size_t buflen, int *errnop,
-			       int *herrnop)
-{
-  if (af != AF_INET && af != AF_INET6)
-    {
-      *herrnop = HOST_NOT_FOUND;
-      return NSS_STATUS_NOTFOUND;
-    }
-
-  return internal_gethostbyname2_r (name, af, host, buffer, buflen, errnop,
-				    herrnop);
-}
-
-
-enum nss_status
-_nss_nisplus_gethostbyname_r (const char *name, struct hostent *host,
-			      char *buffer, size_t buflen, int *errnop,
-			      int *h_errnop)
-{
-  return internal_gethostbyname2_r (name, AF_INET, host, buffer,
-				   buflen, errnop, h_errnop);
-}
-
-
-enum nss_status
-_nss_nisplus_gethostbyaddr_r (const void *addr, socklen_t addrlen, int af,
-			      struct hostent *host, char *buffer,
-			      size_t buflen, int *errnop, int *herrnop)
-{
-  if (tablename_val == NULL)
-    {
-      enum nss_status status = get_tablename (herrnop);
-      if (status != NSS_STATUS_SUCCESS)
-	return status;
-    }
-
-  if (addr == NULL)
-    return NSS_STATUS_NOTFOUND;
-
-  char buf[24 + tablename_len];
-  int retval, parse_res;
-  int olderr = errno;
-
-  snprintf (buf, sizeof (buf), "[addr=%s],%s",
-	   inet_ntoa (*(const struct in_addr *) addr), tablename_val);
-  nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
-
-  if (result == NULL)
-    {
-      __set_errno (ENOMEM);
-      return NSS_STATUS_TRYAGAIN;
-    }
-
-  retval = niserr2nss (result->status);
-  if (__glibc_unlikely (retval != NSS_STATUS_SUCCESS))
-    {
-      if (retval == NSS_STATUS_TRYAGAIN)
-	{
-	  *errnop = errno;
-	  *herrnop = NETDB_INTERNAL;
-	}
-      else
-	__set_errno (olderr);
-      nis_freeresult (result);
-      return retval;
-    }
-
-  parse_res = _nss_nisplus_parse_hostent (result, af, host,
-					  buffer, buflen, errnop);
-  nis_freeresult (result);
-
-  if (parse_res > 0)
-    return NSS_STATUS_SUCCESS;
-
-  *herrnop = NETDB_INTERNAL;
-  if (parse_res == -1)
-    {
-      *errnop = ERANGE;
-      return NSS_STATUS_TRYAGAIN;
-    }
-
-  __set_errno (olderr);
-  return NSS_STATUS_NOTFOUND;
-}
-
-
-enum nss_status
-_nss_nisplus_gethostbyname4_r (const char *name, struct gaih_addrtuple **pat,
-			       char *buffer, size_t buflen, int *errnop,
-			       int *herrnop, int32_t *ttlp)
-{
-  struct hostent host;
-
-  enum nss_status status = internal_gethostbyname2_r (name, AF_UNSPEC, &host,
-						      buffer, buflen,
-						      errnop, herrnop);
-  if (__glibc_likely (status == NSS_STATUS_SUCCESS))
-    {
-      if (*pat == NULL)
-	{
-	  uintptr_t pad = (-(uintptr_t) buffer
-			   % __alignof__ (struct gaih_addrtuple));
-	  buffer += pad;
-	  buflen = buflen > pad ? buflen - pad : 0;
-
-	  if (__glibc_unlikely (buflen < sizeof (struct gaih_addrtuple)))
-	    {
-	      free (result);
-	      *errnop = ERANGE;
-	      *herrnop = NETDB_INTERNAL;
-	      return NSS_STATUS_TRYAGAIN;
-	    }
-	}
-
-      (*pat)->next = NULL;
-      (*pat)->name = host.h_name;
-      (*pat)->family = host.h_addrtype;
-
-      memcpy ((*pat)->addr, host.h_addr_list[0], host.h_length);
-      (*pat)->scopeid = 0;
-      assert (host.h_addr_list[1] == NULL);
-    }
-
-  return status;
-}