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, 535 deletions

diff --git a/nis/nss_nis/nis-hosts.c b/nis/nss_nis/nis-hosts.c
deleted file mode 100644
index eb074783f7..0000000000
--- a/nis/nss_nis/nis-hosts.c
+++ /dev/null
@@ -1,535 +0,0 @@
-/* Copyright (C) 1996-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Thorsten Kukuk <kukuk@suse.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 <assert.h>
-#include <nss.h>
-#include <ctype.h>
-#include <netdb.h>
-#include <string.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <libc-lock.h>
-#include <rpcsvc/yp.h>
-#include <rpcsvc/ypclnt.h>
-
-#include "nss-nis.h"
-
-#define ENTNAME         hostent
-#define DATABASE        "hosts"
-#define NEED_H_ERRNO
-
-#define EXTRA_ARGS      , af
-#define EXTRA_ARGS_DECL , int af
-
-#define ENTDATA hostent_data
-struct hostent_data
-  {
-    unsigned char host_addr[16];	/* IPv4 or IPv6 address.  */
-    char *h_addr_ptrs[2];	/* Points to that and null terminator.  */
-  };
-
-#define TRAILING_LIST_MEMBER            h_aliases
-#define TRAILING_LIST_SEPARATOR_P       isspace
-#include <nss/nss_files/files-parse.c>
-LINE_PARSER
-("#",
- {
-   char *addr;
-
-   STRING_FIELD (addr, isspace, 1);
-
-   assert (af == AF_INET || af == AF_INET6 || af == AF_UNSPEC);
-
-   /* Parse address.  */
-   if (af != AF_INET6 && inet_pton (AF_INET, addr, entdata->host_addr) > 0)
-     {
-       result->h_addrtype = AF_INET;
-       result->h_length = INADDRSZ;
-     }
-   else if (af != AF_INET
-	    && inet_pton (AF_INET6, addr, entdata->host_addr) > 0)
-     {
-       result->h_addrtype = AF_INET6;
-       result->h_length = IN6ADDRSZ;
-     }
-   else
-     /* Illegal address: ignore line.  */
-     return 0;
-
-   /* Store a pointer to the address in the expected form.  */
-   entdata->h_addr_ptrs[0] = (char *) entdata->host_addr;
-   entdata->h_addr_ptrs[1] = NULL;
-   result->h_addr_list = entdata->h_addr_ptrs;
-
-   STRING_FIELD (result->h_name, isspace, 1);
- })
-
-
-__libc_lock_define_initialized (static, lock)
-
-static bool_t new_start = 1;
-static char *oldkey = NULL;
-static int oldkeylen = 0;
-
-enum nss_status
-_nss_nis_sethostent (int stayopen)
-{
-  return _nss_nis_endhostent ();
-}
-
-enum nss_status
-_nss_nis_endhostent (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;
-}
-libnss_nis_hidden_def (_nss_nis_endhostent)
-
-/* The calling function always need to get a lock first. */
-static enum nss_status
-internal_nis_gethostent_r (struct hostent *host, char *buffer,
-			   size_t buflen, int *errnop, int *h_errnop,
-			   int af)
-{
-  char *domain;
-  if (__glibc_unlikely (yp_get_default_domain (&domain)))
-    return NSS_STATUS_UNAVAIL;
-
-  uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
-  buffer += pad;
-
-  struct parser_data *data = (void *) buffer;
-  if (__glibc_unlikely (buflen < sizeof *data + 1 + pad))
-    {
-      *errnop = ERANGE;
-      *h_errnop = NETDB_INTERNAL;
-      return NSS_STATUS_TRYAGAIN;
-    }
-  buflen -= pad;
-
-  /* Get the next entry until we found a correct one. */
-  const size_t linebuflen = buffer + buflen - data->linebuffer;
-  int parse_res;
-  do
-    {
-      char *result;
-      int len;
-      char *outkey;
-      int keylen;
-      int yperr;
-      if (new_start)
-	yperr = yp_first (domain, "hosts.byname", &outkey, &keylen, &result,
-			  &len);
-      else
-	yperr = yp_next (domain, "hosts.byname", oldkey, oldkeylen, &outkey,
-			 &keylen, &result, &len);
-
-      if (__glibc_unlikely (yperr != YPERR_SUCCESS))
-	{
-	  enum nss_status retval = yperr2nss (yperr);
-
-	  switch (retval)
-	    {
-	    case NSS_STATUS_TRYAGAIN:
-	      *errnop = errno;
-	      *h_errnop = TRY_AGAIN;
-	      break;
-	    case NSS_STATUS_NOTFOUND:
-	      *h_errnop = HOST_NOT_FOUND;
-	      break;
-	    default:
-	      *h_errnop = NO_RECOVERY;
-	      break;
-	    }
-	  return retval;
-	}
-
-      if (__glibc_unlikely ((size_t) (len + 1) > linebuflen))
-	{
-	  free (result);
-	  *h_errnop = NETDB_INTERNAL;
-	  *errnop = ERANGE;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-
-      char *p = strncpy (data->linebuffer, result, len);
-      data->linebuffer[len] = '\0';
-      while (isspace (*p))
-	++p;
-      free (result);
-
-      parse_res = parse_line (p, host, data, buflen, errnop, af);
-      if (__glibc_unlikely (parse_res == -1))
-	{
-	  free (outkey);
-	  *h_errnop = NETDB_INTERNAL;
-	  *errnop = ERANGE;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-      free (oldkey);
-      oldkey = outkey;
-      oldkeylen = keylen;
-      new_start = 0;
-    }
-  while (!parse_res);
-
-  *h_errnop = NETDB_SUCCESS;
-  return NSS_STATUS_SUCCESS;
-}
-
-
-enum nss_status
-_nss_nis_gethostent_r (struct hostent *host, char *buffer, size_t buflen,
-		       int *errnop, int *h_errnop)
-{
-  enum nss_status status;
-
-  __libc_lock_lock (lock);
-
-  status = internal_nis_gethostent_r (host, buffer, buflen, errnop, h_errnop,
-				      AF_INET);
-
-  __libc_lock_unlock (lock);
-
-  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 *h_errnop)
-{
-  uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
-  buffer += pad;
-
-  struct parser_data *data = (void *) buffer;
-
-  if (name == NULL)
-    {
-      *errnop = EINVAL;
-      return NSS_STATUS_UNAVAIL;
-    }
-
-  char *domain;
-  if (yp_get_default_domain (&domain))
-    return NSS_STATUS_UNAVAIL;
-
-  if (buflen < sizeof *data + 1 + pad)
-    {
-      *h_errnop = NETDB_INTERNAL;
-      *errnop = ERANGE;
-      return NSS_STATUS_TRYAGAIN;
-    }
-  buflen -= pad;
-
-  /* Convert name to lowercase.  */
-  size_t namlen = strlen (name);
-  /* Limit name length to the maximum size of an RPC packet.  */
-  if (namlen > UDPMSGSIZE)
-    {
-      *errnop = ERANGE;
-      return NSS_STATUS_UNAVAIL;
-    }
-
-  char name2[namlen + 1];
-  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, "hosts.byname", name2, namlen, &result, &len);
-
-  if (__glibc_unlikely (yperr != YPERR_SUCCESS))
-    {
-      enum nss_status retval = yperr2nss (yperr);
-
-      if (retval == NSS_STATUS_TRYAGAIN)
-	{
-	  *h_errnop = TRY_AGAIN;
-	  *errnop = errno;
-	}
-      if (retval == NSS_STATUS_NOTFOUND)
-	*h_errnop = HOST_NOT_FOUND;
-      return retval;
-    }
-
-  const size_t linebuflen = buffer + buflen - data->linebuffer;
-  if (__glibc_unlikely ((size_t) (len + 1) > linebuflen))
-    {
-      free (result);
-      *h_errnop = NETDB_INTERNAL;
-      *errnop = ERANGE;
-      return NSS_STATUS_TRYAGAIN;
-    }
-
-  char *p = strncpy (data->linebuffer, result, len);
-  data->linebuffer[len] = '\0';
-  while (isspace (*p))
-    ++p;
-  free (result);
-
-  int parse_res = parse_line (p, host, data, buflen, errnop, af);
-
-  if (__glibc_unlikely (parse_res < 1 || host->h_addrtype != af))
-    {
-      if (parse_res == -1)
-	{
-	  *h_errnop = NETDB_INTERNAL;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-      else
-	{
-	  *h_errnop = HOST_NOT_FOUND;
-	  return NSS_STATUS_NOTFOUND;
-	}
-    }
-
-  *h_errnop = NETDB_SUCCESS;
-  return NSS_STATUS_SUCCESS;
-}
-
-
-enum nss_status
-_nss_nis_gethostbyname2_r (const char *name, int af, struct hostent *host,
-			   char *buffer, size_t buflen, int *errnop,
-			   int *h_errnop)
-{
-  if (af != AF_INET && af != AF_INET6)
-    {
-      *h_errnop = HOST_NOT_FOUND;
-      return NSS_STATUS_NOTFOUND;
-    }
-
-  return internal_gethostbyname2_r (name, af, host, buffer, buflen, errnop,
-				    h_errnop);
-}
-
-
-enum nss_status
-_nss_nis_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_nis_gethostbyaddr_r (const void *addr, socklen_t addrlen, int af,
-			  struct hostent *host, char *buffer, size_t buflen,
-			  int *errnop, int *h_errnop)
-{
-  char *domain;
-  if (__glibc_unlikely (yp_get_default_domain (&domain)))
-    return NSS_STATUS_UNAVAIL;
-
-  uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
-  buffer += pad;
-
-  struct parser_data *data = (void *) buffer;
-  if (__glibc_unlikely (buflen < sizeof *data + 1 + pad))
-    {
-      *errnop = ERANGE;
-      *h_errnop = NETDB_INTERNAL;
-      return NSS_STATUS_TRYAGAIN;
-    }
-  buflen -= pad;
-
-  char *buf = inet_ntoa (*(const struct in_addr *) addr);
-
-  char *result;
-  int len;
-  int yperr = yp_match (domain, "hosts.byaddr", buf, strlen (buf), &result,
-			&len);
-
-  if (__glibc_unlikely (yperr != YPERR_SUCCESS))
-    {
-      enum nss_status retval = yperr2nss (yperr);
-
-      if (retval == NSS_STATUS_TRYAGAIN)
-	{
-	  *h_errnop = TRY_AGAIN;
-	  *errnop = errno;
-	}
-      else if (retval == NSS_STATUS_NOTFOUND)
-	*h_errnop = HOST_NOT_FOUND;
-
-      return retval;
-    }
-
-  const size_t linebuflen = buffer + buflen - data->linebuffer;
-  if (__glibc_unlikely ((size_t) (len + 1) > linebuflen))
-    {
-      free (result);
-      *errnop = ERANGE;
-      *h_errnop = NETDB_INTERNAL;
-      return NSS_STATUS_TRYAGAIN;
-    }
-
-  char *p = strncpy (data->linebuffer, result, len);
-  data->linebuffer[len] = '\0';
-  while (isspace (*p))
-    ++p;
-  free (result);
-
-  int parse_res = parse_line (p, host, data, buflen, errnop, af);
-  if (__glibc_unlikely (parse_res < 1))
-    {
-      if (parse_res == -1)
-	{
-	  *h_errnop = NETDB_INTERNAL;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-      else
-	{
-	  *h_errnop = HOST_NOT_FOUND;
-	  return NSS_STATUS_NOTFOUND;
-	}
-    }
-
-  *h_errnop = NETDB_SUCCESS;
-  return NSS_STATUS_SUCCESS;
-}
-
-
-enum nss_status
-_nss_nis_gethostbyname4_r (const char *name, struct gaih_addrtuple **pat,
-			   char *buffer, size_t buflen, int *errnop,
-			   int *herrnop, int32_t *ttlp)
-{
-  char *domain;
-  if (yp_get_default_domain (&domain))
-    {
-      *herrnop = NO_DATA;
-      return NSS_STATUS_UNAVAIL;
-    }
-
-  /* Convert name to lowercase.  */
-  size_t namlen = strlen (name);
-  /* Limit name length to the maximum size of an RPC packet.  */
-  if (namlen > UDPMSGSIZE)
-    {
-      *errnop = ERANGE;
-      return NSS_STATUS_UNAVAIL;
-    }
-
-  char name2[namlen + 1];
-  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, "hosts.byname", name2, namlen, &result, &len);
-
-  if (__glibc_unlikely (yperr != YPERR_SUCCESS))
-    {
-      enum nss_status retval = yperr2nss (yperr);
-
-      if (retval == NSS_STATUS_TRYAGAIN)
-	{
-	  *herrnop = TRY_AGAIN;
-	  *errnop = errno;
-	}
-      if (retval == NSS_STATUS_NOTFOUND)
-	*herrnop = HOST_NOT_FOUND;
-      return retval;
-    }
-
-  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)))
-	{
-	erange:
-	  free (result);
-	  *errnop = ERANGE;
-	  *herrnop = NETDB_INTERNAL;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-
-      *pat = (struct gaih_addrtuple *) buffer;
-      buffer += sizeof (struct gaih_addrtuple);
-      buflen -= sizeof (struct gaih_addrtuple);
-    }
-
-  uintptr_t pad = -(uintptr_t) buffer % __alignof__ (struct parser_data);
-  buffer += pad;
-
-  struct parser_data *data = (void *) buffer;
-
-  if (__glibc_unlikely (buflen < sizeof *data + 1 + pad))
-    goto erange;
-  buflen -= pad;
-
-  struct hostent host;
-  int parse_res = parse_line (result, &host, data, buflen, errnop, AF_UNSPEC);
-  if (__glibc_unlikely (parse_res < 1))
-    {
-      if (parse_res == -1)
-	{
-	  *herrnop = NETDB_INTERNAL;
-	  return NSS_STATUS_TRYAGAIN;
-	}
-      else
-	{
-	  *herrnop = HOST_NOT_FOUND;
-	  return NSS_STATUS_NOTFOUND;
-	}
-    }
-
-  (*pat)->next = NULL;
-  (*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);
-
-  /* Undo the alignment for parser_data.  */
-  buffer -= pad;
-  buflen += pad;
-
-  size_t h_name_len = strlen (host.h_name) + 1;
-  if (h_name_len >= buflen)
-    goto erange;
-  (*pat)->name = memcpy (buffer, host.h_name, h_name_len);
-
-  free (result);
-
-  return NSS_STATUS_SUCCESS;
-}