Tue Jun 25 02:59:11 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu> cvs/libc-960625

	* malloc/malloc.h: Declare malloc_object_allocated_size, malloc_walk.
	* malloc/Makefile (dist-routines): Add malloc-size, malloc-walk.
	* malloc/malloc-size.c: New file.
	* malloc/malloc-walk.c: New file.

	* malloc/malloc-find.c (malloc_find_object_address): Return null if
	PTR is outside the heap.

	* elf/dl-load.c (_dl_map_object): If the requested name matches the
 	soname of a loaded object, use that object.

Mon Jun 24 19:57:01 1996  Roland McGrath  <roland@delasyd.gnu.ai.mit.edu>

	* Makefile (subdirs): Add nss.

	* inet/Makefile (routines): Add getrpcent, getrpcbyname,
	getrpcbynumber, getrpcent_r, getrpcbyname_r, getrpcbynumber_r.
	* inet/getrpcbynumber_r.c: New file.
	* inet/getrpcbynumber.c: New file.
	* inet/getrpcbyname.c: New file.
	* inet/getrpcbyname_r.c: New file.
	* inet/getrpcent_r.c: New file.
	* inet/getrpcent.c: New file.
	* nss/rpc-lookup.c: New file.
	* nss/nss_files/files-rpc.c: New file.
	* nss/Makefile (routines): Add rpc-lookup.
	(libnss_files-routines): Add files-rpc.
	* sunrpc/Makefile (routines): Remove getrpcent.
	* sunrpc/getrpcent.c: File removed.

	* nss/getXXent_r.c (REENTRANT_GETNAME): Clear NO_MORE when NIP is
	non-null on entry.

	* Makeconfig (rpath-link): Add $(nssobjdir).
	(nssobjdir): New variable.

	* Makerules: Move shared library building before objects rules, so
	versions are known before extra-lib.mk gets included.
	* extra-lib.mk (lib-noranlib): Depend on the shared object too.

	* pwd/getpwuid.c: Rewritten using nss.
	* pwd/getpwnam.c: Likewise.
	* pwd/getpwent.c: Likewise.
	* grp/getgrnam.c: Likewise.
	* grp/getgrgid.c: Likewise.
	* grp/getgrent.c: Likewise.
	* pwd/Makefile (routines): Add getpwent_r, getpwnam_r, getpwuid_r.
	* pwd/getpwent_r.c: New file.
	* pwd/getpwnam_r.c: New file.
	* pwd/getpwuid_r.c: New file.
	* grp/Makefile (routines): Add getgrent_r, getgrgid_r, getgrnam_r.
	* grp/getgrnam_r.c: New file.
	* grp/getgrgid_r.c: New file.
	* grp/getgrent_r.c: New file.
	* grp/Makefile (routines): Remove grpopen, grpread.
	* pwd/Makefile (routines): Remove pwdopen, pwdread.
	* grp/grpopen.c, grp/grpread.c, pwd/pwdopen.c, pwd/pwdread.c: Removed.

	* pwd/fgetpwent.c: Rewritten using files-parse.c.
	* grp/fgetgrent.c: Likewise.

	* nss/Makefile (routines): Add grp-lookup and pwd-lookup.
	* nss/pwd-lookup.c, nss/grp-lookup.c: New files.
	* nss/nss_files/files-grp.c: New file.
	* nss/nss_files/files-pwd.c: New file.

	* nss/Makefile (subdir-dirs): New variable; use it in vpath.

	* nss/nss_files/files-parse.c: New file.
	* nss/nss_files/files-XXX.c: New file.
	* nss/nss_files/files-hosts.c, nss/nss_files/files-proto.c,
	nss/nss_files/files-service.c, nss/nss_files/files-network.c:
	Rewritten using them.

	* nss/Makefile (libnss_files-routines): Remove files-host.
	Add files-hosts, files-grp, files-pwd.

	* nss/nss_dns/dns-network.c: Don't include <pthread.h>.

Mon Jun 24 22:39:12 1996  Richard Henderson  <rth@tamu.edu>

	* sysdeps/alpha/dl-machine.h (ELF_MACHINE_RUNTIME_TRAMPOLINE):
	A .plt entry now loads the .rela.plt offset directly rather
	than making us calculate it.

Sun Jun 23 15:24:05 1996  Roland McGrath  <roland@delasyd.gnu.ai.mit.edu>

	* time/Makefile ($(installed-localtime-file) rule): Do
	$(make-target-directory) first.

	* resolv.h: Fix wrapper for resolv/resolv.h.

	* configure.in (ld --no-whole-archive check): Use AC_TRY_COMMAND.
	Compile dummy file and pass -nostdlib -nostartfiles so as not to
	require installed libraries.

	* shlib-versions (*-*-*): Set libresolv=2, libnss_files=1,
	libnss_dns=1.

Sun Jun 23 19:42:05 1996  Ulrich Drepper  <drepper@cygnus.com>

	* resolv/netdb.h (_PATH_NSSWITCH_CONF): New macro.

	* inet/herrno.c: New file.

	* resolv/res_init.c: Remove res_hconf calls.

	* nss/Makefile, nss/XXX-lookup.c, nss/file-lookup.c,
	nss/getXXbyYY.c, nss/getXXbyYY_r.c, nss/getXXent.c,
	nss/getXXent_r.c, nss/host-lookup.c, nss/network-lookup.c,
	nss/nsswitch.c, nss/nsswitch.h, nss/proto-lookup.c,
	nss/service-lookup.c: New files.  Implementation of name
	service switch, following the approach in Solaris.
	Interface specification and general structure inspired by Peter
	Eriksson <pen@lysator.liu.se>.
	* nss/nss_files/files-host.c, nss/nss_files/files-network.c,
	nss/nss_files/files-proto.c, nss/nss_files/files-service.c:
	Implementation of libnss_files.so module for file based databases
	in NSS service.
	* nss/nss_dns/dns-host.c, nss/nss_dns/dns-network.c: Implementation
        if libnss_dns.so module for DNS name lookup in NSS service.

	* inet/getproto.c, inet/getprtent.c, inet/getprtname.c,
	inet/getservent.c, inet/getsrvbynm.c, inet/getsrvbypt.c:
	Changed to serve as interface to NSS.
	* inet/gethstbyad.c, inet/gethstbyad_r.c, inet/gethstbynm.c,
	inet/gethstbynm2.c, inet/gethstbynm2_r.c, inet/gethstbynm_r.c,
	inet/gethstent.c, inet/gethstent_r.c, inet/getnetbynm.c,
	inet/getnetbynm_r.c, inet/getnetbypt.c, inet/getnetbypt_r.c,
	inet/getnetent.c, inet/getnetent_r.c, inet/getproto_r.c,
	inet/getprtent_r.c, inet/getprtname_r.c, inet/getservent_r.c,
	inet/getsrvbynm_r.c, inet/getsrvbypt_r.c: New files.  Implement
	interfaces to NSS, including reentrant functions.

	* resolv/getnetbyaddr.c, resolv/getnetbyname.c, resolv/getnetent.c,
	resolv/sethostent.c: Removed:  Obsoleted by NSS.

	* resolv/mapv4v6addr.h, resolv/mapv4v6hostent.h: Extracted from
	gethnamaddr.c.  These private functions are now used in more
	than one file.

	* resolv/inet_pton.c, resolv/gethnamaddr.c: Updated to bind-4.9.4-T5B.

Sat Jun 22 16:49:47 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* rpm/Makefile ($(config)): Make sure the word list in the for
	loop is syntactically non-empty.

27 files changed, 3251 insertions, 0 deletions

diff --git a/nss/Makefile b/nss/Makefile
new file mode 100644
index 0000000000..91c4ef7380
--- /dev/null
+++ b/nss/Makefile
@@ -0,0 +1,57 @@
+# Copyright (C) 1996 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 Library General Public License as
+# published by the Free Software Foundation; either version 2 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
+# Library General Public License for more details.
+
+# You should have received a copy of the GNU Library General Public
+# License along with the GNU C Library; see the file COPYING.LIB.  If
+# not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#
+#	Makefile for name service switch.
+#
+subdir	:= nss
+
+distribute		:= nsswitch.h XXX-lookup.c getXXbyYY.c getXXbyYY_r.c \
+			   getXXent.c getXXent_r.c
+
+# This is the trivial part which goes into libc itself.
+routines		:= nsswitch \
+			   $(addsuffix -lookup,proto service host network \
+					       grp pwd rpc)
+
+
+# Specify rules for the nss_* modules.  We have some services.
+services		:= files dns
+
+extra-libs		= $(services:%=libnss_%)
+
+# The sources are found in the appropriate subdir.
+subdir-dirs = nss_files nss_dns
+vpath %.c $(subdir-dirs)
+
+
+libnss_files-routines	:= files-proto files-service files-network \
+			   files-hosts files-grp files-pwd files-rpc
+distribute		+= files-XXX.c files-parse.c
+
+libnss_dns-routines	:= dns-host dns-network
+
+libnss_files-inhibit-o	= $(filter-out .so,$(object-suffixes))
+libnss_dns-inhibit-o	= $(filter-out .so,$(object-suffixes))
+
+
+include ../Rules
+
+
+resobjdir := $(firstword $(objdir) $(patsubst ../$(subdir),.,$(..)resolv))
+LDLIBS-nss_dns.so = -L$(resobjdir) -Wl,-rpath-link=$(resobjdir) -lresolv
diff --git a/nss/XXX-lookup.c b/nss/XXX-lookup.c
new file mode 100644
index 0000000000..1f8cbbf015
--- /dev/null
+++ b/nss/XXX-lookup.c
@@ -0,0 +1,51 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include "nsswitch.h"
+
+/*******************************************************************\
+|* Here we assume one symbol to be defined:			   *|
+|* 								   *|
+|* DATABASE_NAME - name of the database the function accesses	   *|
+|*		   (e.g., hosts, servicess, ...)		   *|
+|* 								   *|
+\*******************************************************************/
+
+#define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup)
+#define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
+#define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
+
+#define DATABASE_NAME_STRING STRINGIFY1 (DATABASE_NAME)
+#define STRINGIFY1(Name) STRINGIFY2 (Name)
+#define STRINGIFY2(Name) #Name
+
+
+static service_user *database = NULL;
+
+int
+DB_LOOKUP_FCT (service_user **ni, const char *fct_name, void **fctp)
+{
+  if (database == NULL
+      && __nss_database_lookup (DATABASE_NAME_STRING, &database) < 0)
+    return -1;
+
+  *ni = database;
+
+  return __nss_lookup (ni, fct_name, fctp);
+}
diff --git a/nss/file-lookup.c b/nss/file-lookup.c
new file mode 100644
index 0000000000..d9f7c67320
--- /dev/null
+++ b/nss/file-lookup.c
@@ -0,0 +1,22 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#define DATABASE_NAME hosts
+
+#include "XXX-lookup.c"
diff --git a/nss/getXXbyYY.c b/nss/getXXbyYY.c
new file mode 100644
index 0000000000..5eb9ee9c87
--- /dev/null
+++ b/nss/getXXbyYY.c
@@ -0,0 +1,71 @@
+/* Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include "../nss/nsswitch.h"
+
+/*******************************************************************\
+|* Here we assume several symbols to be defined:		   *|
+|* 								   *|
+|* LOOKUP_TYPE   - the return type of the function		   *|
+|* 								   *|
+|* FUNCTION_NAME - name of the non-reentrant function		   *|
+|* 								   *|
+|* DATABASE_NAME - name of the database the function accesses	   *|
+|*		   (e.g., host, services, ...)			   *|
+|* 								   *|
+|* ADD_PARAMS    - additional parameter, can vary in number	   *|
+|* 								   *|
+|* ADD_VARIABLES - names of additional parameter		   *|
+|* 								   *|
+|* BUFLEN	 - length of buffer allocated for the non	   *|
+|*		   reentrant version				   *|
+|* 								   *|
+|* Optionally the following vars can be defined:		   *|
+|* 								   *|
+|* NEED_H_ERRNO  - an extra parameter will be passed to point to   *|
+|*		   the global `h_errno' variable.		   *|
+|* 								   *|
+\*******************************************************************/
+
+/* To make the real sources a bit prettier.  */
+#define REENTRANT_NAME APPEND_R (FUNCTION_NAME)
+#define APPEND_R(name) APPEND_R1 (name)
+#define APPEND_R1(name) name##_r
+
+/* Sometimes we need to store error codes in the `h_errno' variable.  */
+#ifdef NEED_H_ERRNO
+# define H_ERRNO_PARM , int *h_errnop
+# define H_ERRNO_VAR , &h_errno
+#else
+# define H_ERRNO_PARM
+# define H_ERRNO_VAR
+#endif
+
+
+/* Prototype for reentrant version we use here.  */
+extern LOOKUP_TYPE *REENTRANT_NAME (ADD_PARAMS, LOOKUP_TYPE *result,
+				    char *buffer, int buflen H_ERRNO_PARM);
+
+LOOKUP_TYPE *
+FUNCTION_NAME (ADD_PARAMS)
+{
+  static LOOKUP_TYPE result;
+  static char buffer[BUFLEN];
+
+  return REENTRANT_NAME (ADD_VARIABLES, &result, buffer, BUFLEN H_ERRNO_VAR);
+}
diff --git a/nss/getXXbyYY_r.c b/nss/getXXbyYY_r.c
new file mode 100644
index 0000000000..42092361be
--- /dev/null
+++ b/nss/getXXbyYY_r.c
@@ -0,0 +1,129 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include "nsswitch.h"
+
+/*******************************************************************\
+|* Here we assume several symbols to be defined:		   *|
+|* 								   *|
+|* LOOKUP_TYPE   - the return type of the function		   *|
+|* 								   *|
+|* FUNCTION_NAME - name of the non-reentrant function		   *|
+|* 								   *|
+|* DATABASE_NAME - name of the database the function accesses	   *|
+|*		   (e.g., host, services, ...)			   *|
+|* 								   *|
+|* ADD_PARAMS    - additional parameter, can vary in number	   *|
+|* 								   *|
+|* ADD_VARIABLES - names of additional parameter		   *|
+|* 								   *|
+|* Optionally the following vars can be defined:		   *|
+|* 								   *|
+|* NEED_H_ERRNO  - an extra parameter will be passed to point to   *|
+|*		   the global `h_errno' variable.		   *|
+|* 								   *|
+|* NEED__RES     - the global _res variable might be used so we	   *|
+|* 		   will have to initialize it if necessary	   *|
+|* 								   *|
+\*******************************************************************/
+
+/* To make the real sources a bit prettier.  */
+#define REENTRANT_NAME APPEND_R (FUNCTION_NAME)
+#define APPEND_R(name) APPEND_R1 (name)
+#define APPEND_R1(name) name##_r
+
+#define FUNCTION_NAME_STRING STRINGIZE (FUNCTION_NAME)
+#define REENTRANT_NAME_STRING STRINGIZE (REENTRANT_NAME)
+#define DATABASE_NAME_STRING STRINGIZE (DATABASE_NAME)
+#define STRINGIZE(name) STRINGIZE1 (name)
+#define STRINGIZE1(name) #name
+
+#define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup)
+#define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
+#define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
+
+/* Sometimes we need to store error codes in the `h_errno' variable.  */
+#ifdef NEED_H_ERRNO
+# define H_ERRNO_PARM , int *h_errnop
+# define H_ERRNO_VAR , h_errnop
+#else
+# define H_ERRNO_PARM
+# define H_ERRNO_VAR
+#endif
+
+
+/* Type of the lookup function we need here.  */
+typedef int (*lookup_function) (ADD_PARAMS, LOOKUP_TYPE *, char *, int
+				H_ERRNO_PARM);
+
+/* Some usages of this file might use this variable.  */
+extern struct __res_state _res;
+
+/* The lookup function for the first entry of this service.  */
+extern int DB_LOOKUP_FCT (service_user **nip, const char *name, void **fctp);
+
+
+
+LOOKUP_TYPE *
+REENTRANT_NAME (ADD_PARAMS, LOOKUP_TYPE *result, char *buffer, int buflen
+		H_ERRNO_PARM)
+{
+  static service_user *startp = NULL;
+  static lookup_function start_fct;
+  service_user *nip;
+  lookup_function fct;
+  int no_more;
+  enum nss_status status = NSS_STATUS_UNAVAIL;
+
+  if (startp == NULL)
+    {
+      no_more = DB_LOOKUP_FCT (&nip, REENTRANT_NAME_STRING, (void **) &fct);
+      if (no_more)
+	startp = (service_user *) -1;
+      else
+	{
+	  startp = nip;
+	  start_fct = fct;
+
+#ifdef NEED__RES
+	  /* The resolver code will really be used so we have to
+	     initialize it.  */
+	  if ((_res.options & RES_INIT) == 0 && res_init () == -1)
+	    {
+	      h_errno = NETDB_INTERNAL;
+	      return NULL;
+	    }
+#endif /* need _res */
+	}
+    }
+  else
+    {
+      fct = start_fct;
+      no_more = (nip = startp) == (service_user *) -1;
+    }
+
+  while (no_more == 0)
+    {
+      status = (*fct) (ADD_VARIABLES, result, buffer, buflen H_ERRNO_VAR);
+
+      no_more = __nss_next (&nip, REENTRANT_NAME_STRING, &fct, status, 0);
+    }
+
+  return status == NSS_STATUS_SUCCESS ? result : NULL;
+}
diff --git a/nss/getXXent.c b/nss/getXXent.c
new file mode 100644
index 0000000000..da3712c70f
--- /dev/null
+++ b/nss/getXXent.c
@@ -0,0 +1,63 @@
+/* Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include "nsswitch.h"
+
+/*******************************************************************\
+|* Here we assume several symbols to be defined:		   *|
+|* 								   *|
+|* LOOKUP_TYPE   - the return type of the function		   *|
+|* 								   *|
+|* GETFUNC_NAME  - name of the non-reentrant getXXXent function	   *|
+|* 								   *|
+|* BUFLEN	 - size of static buffer			   *|
+|* 								   *|
+|* Optionally the following vars can be defined:		   *|
+|* 								   *|
+|* NEED_H_ERRNO  - an extra parameter will be passed to point to   *|
+|*		   the global `h_errno' variable.		   *|
+|* 								   *|
+\*******************************************************************/
+
+/* To make the real sources a bit prettier.  */
+#define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME)
+#define APPEND_R(name) APPEND_R1 (name)
+#define APPEND_R1(name) name##_r
+
+/* Sometimes we need to store error codes in the `h_errno' variable.  */
+#ifdef NEED_H_ERRNO
+# define H_ERRNO_PARM , int *h_errnop
+# define H_ERRNO_VAR , &h_errno
+#else
+# define H_ERRNO_PARM
+# define H_ERRNO_VAR
+#endif
+
+/* Prototype of the reentrant version.  */
+LOOKUP_TYPE *REENTRANT_GETNAME (LOOKUP_TYPE *result, char *buffer,
+				int buflen H_ERRNO_PARM);
+
+
+LOOKUP_TYPE *
+GETFUNC_NAME (void)
+{
+  static char buffer[BUFLEN];
+  LOOKUP_TYPE result;
+
+  return REENTRANT_GETNAME (&result, buffer, BUFLEN H_ERRNO_VAR);
+}
diff --git a/nss/getXXent_r.c b/nss/getXXent_r.c
new file mode 100644
index 0000000000..3d1e9593e6
--- /dev/null
+++ b/nss/getXXent_r.c
@@ -0,0 +1,222 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include <libc-lock.h>
+
+#include "nsswitch.h"
+
+/*******************************************************************\
+|* Here we assume several symbols to be defined:		   *|
+|* 								   *|
+|* LOOKUP_TYPE   - the return type of the function		   *|
+|* 								   *|
+|* SETFUNC_NAME  - name of the non-reentrant setXXXent function	   *|
+|* 								   *|
+|* GETFUNC_NAME  - name of the non-reentrant getXXXent function	   *|
+|* 								   *|
+|* ENDFUNC_NAME  - name of the non-reentrant endXXXent function	   *|
+|* 								   *|
+|* DATABASE_NAME - name of the database the function accesses	   *|
+|*		   (e.g., host, services, ...)			   *|
+|* 								   *|
+|* Optionally the following vars can be defined:		   *|
+|* 								   *|
+|* STAYOPEN      - variable declaration for setXXXent function	   *|
+|* 								   *|
+|* STAYOPEN_VAR  - variable name for setXXXent function		   *|
+|* 								   *|
+|* NEED_H_ERRNO  - an extra parameter will be passed to point to   *|
+|*		   the global `h_errno' variable.		   *|
+|* 								   *|
+\*******************************************************************/
+
+/* To make the real sources a bit prettier.  */
+#define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME)
+#define APPEND_R(name) APPEND_R1 (name)
+#define APPEND_R1(name) name##_r
+
+#define SETFUNC_NAME_STRING STRINGIZE (SETFUNC_NAME)
+#define GETFUNC_NAME_STRING STRINGIZE (GETFUNC_NAME)
+#define ENDFUNC_NAME_STRING STRINGIZE (ENDFUNC_NAME)
+#define DATABASE_NAME_STRING STRINGIZE (DATABASE_NAME)
+#define STRINGIZE(name) STRINGIZE1 (name)
+#define STRINGIZE1(name) #name
+
+#define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup)
+#define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post)
+#define CONCAT3_2(Pre, Name, Post) Pre##Name##Post
+
+/* Sometimes we need to store error codes in the `h_errno' variable.  */
+#ifdef NEED_H_ERRNO
+# define H_ERRNO_PARM , int *h_errnop
+# define H_ERRNO_VAR , &h_errno
+#else
+# define H_ERRNO_PARM
+# define H_ERRNO_VAR
+#endif
+
+/* Some databases take the `stayopen' flag.  */
+#ifndef STAYOPEN
+#define STAYOPEN void
+#define STAYOPEN_VAR
+#endif
+
+/* Prototype for the setXXXent functions we use here.  */
+typedef int (*set_function) (STAYOPEN);
+
+/* Prototype for the endXXXent functions we use here.  */
+typedef int (*end_function) (void);
+
+/* Prototype for the setXXXent functions we use here.  */
+typedef int (*get_function) (LOOKUP_TYPE *, char *, int H_ERRNO_PARM);
+
+
+/* This handle for the NSS data base is shared between all
+   set/get/endXXXent functions.  */
+static service_user *nip;
+/* Remember the first service_entry, it's always the same.  */
+static service_user *startp;
+
+/* Protect above variable against multiple uses at the same time.  */
+__libc_lock_define_initialized (static, lock);
+
+/* The lookup function for the first entry of this service.  */
+extern int DB_LOOKUP_FCT (service_user **nip, const char *name, void **fctp);
+
+
+void
+APPEND_R (SETFUNC_NAME) (STAYOPEN)
+{
+  set_function fct;
+  int no_more;
+
+#ifdef NEED__RES
+  if ((_res.options & RES_INIT) == 0 && res_init () == -1)
+    {
+      h_errno = NETDB_INTERNAL;
+      return NULL;
+    }
+#endif /* need _res */
+
+  __libc_lock_lock (lock);
+
+  if (startp == NULL)
+    {
+      no_more = DB_LOOKUP_FCT (&nip, SETFUNC_NAME_STRING, (void **) &fct);
+      startp = no_more == 0 ? (service_user *) -1 : nip;
+    }
+  else
+    no_more = (nip = startp) != (service_user *) -1;
+
+  /* Cycle through all the services and run their setXXent functions.  */
+  while (! no_more)
+    {
+      /* Ignore status, we force check in __NSS_NEXT.  */
+      (void) (*fct) (STAYOPEN_VAR);
+
+      no_more = __nss_next (&nip, SETFUNC_NAME_STRING, (void **) &fct, 0, 1);
+    }
+
+  __libc_lock_unlock (lock);
+}
+
+
+void
+APPEND_R (ENDFUNC_NAME) (void)
+{
+  end_function fct;
+  int no_more;
+
+#ifdef NEED__RES
+  if ((_res.options & RES_INIT) == 0 && res_init () == -1)
+    {
+      h_errno = NETDB_INTERNAL;
+      return NULL;
+    }
+#endif /* need _res */
+
+  __libc_lock_lock (lock);
+
+  if (startp == NULL)
+    {
+      no_more = DB_LOOKUP_FCT (&nip, SETFUNC_NAME_STRING, (void **) &fct);
+      startp = no_more == 0 ? (service_user *) -1 : nip;
+    }
+  else
+    no_more = (nip = startp) != (service_user *) -1;
+
+  /* Cycle through all the services and run their endXXent functions.  */
+  while (no_more == 0)
+    {
+      /* Ignore status, we force check in __NSS_NEXT.  */
+      (void) (*fct) ();
+
+      no_more = __nss_next (&nip, ENDFUNC_NAME_STRING, (void **) &fct, 0, 1);
+    }
+
+  __libc_lock_unlock (lock);
+}
+
+
+LOOKUP_TYPE *
+REENTRANT_GETNAME (LOOKUP_TYPE *result, char *buffer, int buflen H_ERRNO_PARM)
+{
+  get_function fct;
+  int no_more;
+  enum nss_status status = NSS_STATUS_NOTFOUND;
+
+#ifdef NEED__RES
+  if ((_res.options & RES_INIT) == 0 && res_init () == -1)
+    {
+      h_errno = NETDB_INTERNAL;
+      return NULL;
+    }
+#endif /* need _res */
+
+  __libc_lock_lock (lock);
+
+  if (nip)
+    /* Continuing a walk-through started before.  */
+    no_more = 0;
+  else
+    {
+      if (startp == NULL)
+	{
+	  no_more = DB_LOOKUP_FCT (&nip, SETFUNC_NAME_STRING, (void **) &fct);
+	  startp = no_more == 0 ? (service_user *) -1 : nip;
+	}
+      else
+	no_more = (nip = startp) != (service_user *) -1;
+
+      if (no_more != 0)
+	status = NSS_STATUS_UNAVAIL;
+    }
+
+  while (no_more == 0)
+    {
+      status = (*fct) (result, buffer, buflen H_ERRNO_VAR);
+
+      no_more = __nss_next (&nip, GETFUNC_NAME_STRING, (void **) &fct,
+			    status, 0);
+    }
+
+  __libc_lock_unlock (lock);
+
+  return status == NSS_STATUS_SUCCESS ? result : NULL;
+}
diff --git a/nss/grp-lookup.c b/nss/grp-lookup.c
new file mode 100644
index 0000000000..ce3753c665
--- /dev/null
+++ b/nss/grp-lookup.c
@@ -0,0 +1,22 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#define DATABASE_NAME group
+
+#include "XXX-lookup.c"
diff --git a/nss/host-lookup.c b/nss/host-lookup.c
new file mode 100644
index 0000000000..d9f7c67320
--- /dev/null
+++ b/nss/host-lookup.c
@@ -0,0 +1,22 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#define DATABASE_NAME hosts
+
+#include "XXX-lookup.c"
diff --git a/nss/network-lookup.c b/nss/network-lookup.c
new file mode 100644
index 0000000000..ab6e51f5c4
--- /dev/null
+++ b/nss/network-lookup.c
@@ -0,0 +1,22 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#define DATABASE_NAME networks
+
+#include "XXX-lookup.c"
diff --git a/nss/nss_dns/dns-host.c b/nss/nss_dns/dns-host.c
new file mode 100644
index 0000000000..eaa9e81218
--- /dev/null
+++ b/nss/nss_dns/dns-host.c
@@ -0,0 +1,611 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* Parts of this file are plain copies of the file `getnetnamadr.c' from
+   the bind package and it has the following copyright.  */
+
+/* Copyright (c) 1993 Carlos Leandro and Rui Salgueiro
+ *      Dep. Matematica Universidade de Coimbra, Portugal, Europe
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ */
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/syslog.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+
+#include "nsswitch.h"
+
+/* Get implementation for some internal functions.  */
+#include "../resolv/mapv4v6addr.h"
+#include "../resolv/mapv4v6hostent.h"
+
+/* Maximum number of aliases we allow.  */
+#define MAX_NR_ALIASES	48
+#define MAX_NR_ADDRS	48
+
+#if PACKETSZ > 1024
+# define MAXPACKET	PACKETSZ
+#else
+# define MAXPACKET	1024
+#endif
+
+static const char AskedForGot[] = "\
+gethostby*.getanswer: asked for \"%s\", got \"%s\"";
+
+
+/* We need this time later.  */
+typedef union querybuf
+{
+  HEADER hdr;
+  u_char buf[MAXPACKET];
+} querybuf;
+
+
+static enum nss_status getanswer_r (const querybuf *answer, int anslen,
+				    const char *qname, int qtype,
+				    struct hostent *result,
+				    char *buffer, int buflen, int *h_errnop);
+
+enum nss_status
+_nss_dns_gethostbyname2_r (const char *name, int af, struct hostent *result,
+			   char *buffer, int buflen, int *h_errnop)
+{
+  struct host_data
+  {
+    char *aliases[MAX_NR_ALIASES];
+    unsigned char host_addr[16];	/* IPv4 or IPv6 */
+    char *h_addr_ptrs[MAX_NR_ADDRS + 1];
+    char linebuffer[0];
+  } *host_data = (struct host_data *) buffer;
+  int linebuflen = buflen - offsetof (struct host_data, linebuffer);
+  querybuf host_buffer;
+  int size, type, n;
+  const char *cp;
+
+  switch (af) {
+  case AF_INET:
+    size = INADDRSZ;
+    type = T_A;
+    break;
+  case AF_INET6:
+    size = IN6ADDRSZ;
+    type = T_AAAA;
+    break;
+  default:
+    *h_errnop = NETDB_INTERNAL;
+    errno = EAFNOSUPPORT;
+    return NSS_STATUS_UNAVAIL;
+  }
+
+  result->h_addrtype = af;
+  result->h_length = size;
+
+  /*
+   * if there aren't any dots, it could be a user-level alias.
+   * this is also done in res_query() since we are not the only
+   * function that looks up host names.
+   */
+  if (strchr (name, '.') == NULL && (cp = __hostalias (name)) != NULL)
+    name = cp;
+
+  /*
+   * disallow names consisting only of digits/dots, unless
+   * they end in a dot.
+   */
+  if (isdigit (name[0]))
+    for (cp = name;; ++cp)
+      {
+	if (*cp == '\0')
+	  {
+	    char *bp;
+
+	    if (*--cp == '.')
+	      break;
+	    /*
+	     * All-numeric, no dot at the end.  Fake up a hostent
+	     * as if we'd actually done a lookup.
+	     */
+	    if (inet_pton (af, name, host_data->host_addr) <= 0)
+	      {
+		*h_errnop = HOST_NOT_FOUND;
+		return NSS_STATUS_NOTFOUND;
+	      }
+
+	    bp = __stpncpy (host_data->linebuffer, name, linebuflen);
+	    host_data->linebuffer[linebuflen - 1] = '\0';
+	    linebuflen -= bp - host_data->linebuffer;
+
+	    result->h_name = host_data->linebuffer;
+	    result->h_aliases = host_data->aliases;
+	    host_data->aliases[0] = NULL;
+	    host_data->h_addr_ptrs[0] = (char *) host_data->host_addr;
+	    host_data->h_addr_ptrs[1] = NULL;
+	    result->h_addr_list = host_data->h_addr_ptrs;
+
+	    if (_res.options & RES_USE_INET6)
+	      map_v4v6_hostent (result, &bp, &linebuflen);
+	    *h_errnop = NETDB_SUCCESS;
+	    return NSS_STATUS_SUCCESS;
+	  }
+	if (!isdigit (*cp) && *cp != '.')
+	  break;
+      }
+
+  n = res_search (name, C_IN, type, host_buffer.buf, sizeof (host_buffer));
+  if (n < 0)
+    return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND;
+
+  return getanswer_r (&host_buffer, n, name, type, result, buffer, buflen,
+		      h_errnop);
+}
+
+
+enum nss_status
+_nss_dns_gethostbyname_r (const char *name, struct hostent *result,
+			  char *buffer, int buflen, int *h_errnop)
+{
+  enum nss_status status = NSS_STATUS_NOTFOUND;
+
+  if (_res.options & RES_USE_INET6)
+    status = _nss_dns_gethostbyname2_r (name, AF_INET6, result, buffer,
+					buflen, h_errnop);
+  if (status == NSS_STATUS_NOTFOUND)
+    status = _nss_dns_gethostbyname2_r (name, AF_INET, result, buffer,
+					buflen, h_errnop);
+
+  return status;
+}
+
+
+enum nss_status
+_nss_dns_gethostbyaddr_r (const char *addr, int len, int af,
+			  struct hostent *result, char *buffer, int buflen,
+			  int *h_errnop)
+{
+  static const u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff };
+  static const u_char tunnelled[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 };
+  const u_char *uaddr = (const u_char *)addr;
+  struct host_data
+  {
+    char *aliases[MAX_NR_ALIASES];
+    unsigned char host_addr[16];	/* IPv4 or IPv6 */
+    char *h_addr_ptrs[MAX_NR_ADDRS + 1];
+    char linebuffer[0];
+  } *host_data = (struct host_data *) buffer;
+  querybuf host_buffer;
+  char qbuf[MAXDNAME+1], *qp;
+  int size, n, status;
+
+  if (af == AF_INET6 && len == IN6ADDRSZ &&
+      (bcmp (uaddr, mapped, sizeof mapped) == 0
+       || bcmp (uaddr, tunnelled, sizeof tunnelled) == 0))
+    {
+      /* Unmap. */
+      addr += sizeof mapped;
+      uaddr += sizeof mapped;
+      af = AF_INET;
+      len = INADDRSZ;
+    }
+
+  switch (af)
+    {
+    case AF_INET:
+      size = INADDRSZ;
+      break;
+    case AF_INET6:
+      size = IN6ADDRSZ;
+      break;
+    default:
+      errno = EAFNOSUPPORT;
+      *h_errnop = NETDB_INTERNAL;
+      return NSS_STATUS_UNAVAIL;
+    }
+  if (size != len)
+    {
+      errno = EAFNOSUPPORT;
+      *h_errnop = NETDB_INTERNAL;
+      return NSS_STATUS_UNAVAIL;
+    }
+
+  switch (af)
+    {
+    case AF_INET:
+      sprintf (qbuf, "%u.%u.%u.%u.in-addr.arpa", (uaddr[3] & 0xff),
+	       (uaddr[2] & 0xff), (uaddr[1] & 0xff), (uaddr[0] & 0xff));
+      break;
+    case AF_INET6:
+      qp = qbuf;
+      for (n = IN6ADDRSZ - 1; n >= 0; n--)
+	qp += sprintf (qp, "%x.%x.", uaddr[n] & 0xf, (uaddr[n] >> 4) & 0xf);
+      strcpy(qp, "ip6.int");
+      break;
+    default:
+      /* Cannot happen.  */
+    }
+
+  n = res_query (qbuf, C_IN, T_PTR, (u_char *)host_buffer.buf,
+		 sizeof host_buffer);
+  if (n < 0)
+    return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND;
+
+  status = getanswer_r (&host_buffer, n, qbuf, T_PTR, result, buffer, buflen,
+			h_errnop);
+  if (status != NSS_STATUS_SUCCESS)
+    return status;
+
+#ifdef SUNSECURITY
+  This is not implemented because it is not possible to use the current
+  source from bind in a multi-threaded program.
+#endif
+
+  result->h_addrtype = af;
+  result->h_length = len;
+  bcopy (addr, host_data->host_addr, len);
+  host_data->h_addr_ptrs[0] = (char *) host_data->host_addr;
+  host_data->h_addr_ptrs[1] = NULL;
+  if (af == AF_INET && (_res.options & RES_USE_INET6))
+    {
+      map_v4v6_address ((char *) host_data->host_addr,
+			(char *) host_data->host_addr);
+      result->h_addrtype = AF_INET6;
+      result->h_length = IN6ADDRSZ;
+    }
+  *h_errnop = NETDB_SUCCESS;
+  return NSS_STATUS_SUCCESS;
+}
+
+
+static enum nss_status
+getanswer_r (const querybuf *answer, int anslen, const char *qname, int qtype,
+	     struct hostent *result, char *buffer, int buflen, int *h_errnop)
+{
+  struct host_data
+  {
+    char *aliases[MAX_NR_ALIASES];
+    unsigned char host_addr[16];	/* IPv4 or IPv6 */
+    char *h_addr_ptrs[MAX_NR_ADDRS + 1];
+    char linebuffer[0];
+  } *host_data = (struct host_data *) buffer;
+  int linebuflen = buflen - offsetof (struct host_data, linebuffer);
+  register const HEADER *hp;
+  const u_char *end_of_message, *cp;
+  int n, ancount, qdcount;
+  int haveanswer, had_error;
+  char *bp, **ap, **hap;
+  char tbuf[MAXDNAME+1];
+  const char *tname;
+  int (*name_ok) __P ((const char *));
+
+  tname = qname;
+  result->h_name = NULL;
+  end_of_message = answer->buf + anslen;
+  switch (qtype)
+    {
+    case T_A:
+    case T_AAAA:
+      name_ok = res_hnok;
+      break;
+    case T_PTR:
+      name_ok = res_dnok;
+      break;
+    default:
+      return NSS_STATUS_UNAVAIL;  /* XXX should be abort(); */
+    }
+
+  /*
+   * find first satisfactory answer
+   */
+  hp = &answer->hdr;
+  bp = host_data->linebuffer;
+  ancount = ntohs (hp->ancount);
+  qdcount = ntohs (hp->qdcount);
+  cp = answer->buf + HFIXEDSZ;
+  if (qdcount != 1)
+    {
+      *h_errnop = NO_RECOVERY;
+      return NSS_STATUS_UNAVAIL;
+    }
+
+  n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen);
+  if (n < 0 || (*name_ok) (bp) == 0)
+    {
+      *h_errnop = NO_RECOVERY;
+      return NSS_STATUS_UNAVAIL;
+    }
+  cp += n + QFIXEDSZ;
+
+  if (qtype == T_A || qtype == T_AAAA)
+    {
+      /* res_send() has already verified that the query name is the
+       * same as the one we sent; this just gets the expanded name
+       * (i.e., with the succeeding search-domain tacked on).
+       */
+      n = strlen (bp) + 1;             /* for the \0 */
+      result->h_name = bp;
+      bp += n;
+      linebuflen -= n;
+      /* The qname can be abbreviated, but h_name is now absolute. */
+      qname = result->h_name;
+    }
+
+  ap = host_data->aliases;
+  *ap = NULL;
+  result->h_aliases = host_data->aliases;
+  hap = host_data->h_addr_ptrs;
+  *hap = NULL;
+  result->h_addr_list = host_data->h_addr_ptrs;
+  haveanswer = 0;
+  had_error = 0;
+
+  while (ancount-- > 0 && cp < end_of_message && had_error == 0)
+    {
+      int type, class;
+
+      n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen);
+      if (n < 0 || (*name_ok) (bp) == 0)
+	{
+	  ++had_error;
+	  continue;
+	}
+      cp += n;				/* name */
+      type = _getshort (cp);
+      cp += INT16SZ;			/* type */
+      class = _getshort(cp);
+      cp += INT16SZ + INT32SZ;		/* class, TTL */
+      n = _getshort(cp);
+      cp += INT16SZ;			/* len */
+      if (class != C_IN)
+	{
+	  /* XXX - debug? syslog? */
+	  cp += n;
+	  continue;			/* XXX - had_error++ ? */
+	}
+
+      if ((qtype ==T_A || qtype == T_AAAA) && type == T_CNAME)
+	{
+	  if (ap >= &host_data->aliases[MAX_NR_ALIASES - 1])
+	    continue;
+	  n = dn_expand (answer->buf, end_of_message, cp, tbuf, sizeof tbuf);
+	  if (n < 0 || (*name_ok) (tbuf) == 0)
+	    {
+	      ++had_error;
+	      continue;
+	    }
+	  cp += n;
+	  /* Store alias.  */
+	  *ap++ = bp;
+	  n = strlen (bp) + 1;		/* For the \0.  */
+	  bp += n;
+	  linebuflen -= n;
+	  /* Get canonical name.  */
+	  n = strlen (tbuf) + 1;	/* For the \0.  */
+	  if (n > buflen)
+	    {
+	      ++had_error;
+	      continue;
+	    }
+	  strcpy (bp, tbuf);
+	  result->h_name = bp;
+	  bp += n;
+	  linebuflen -= n;
+	  continue;
+	}
+
+      if (qtype == T_PTR && type == T_CNAME)
+	{
+	  n = dn_expand (answer->buf, end_of_message, cp, tbuf, sizeof tbuf);
+	  if (n < 0 || res_hnok (tbuf) == 0)
+	    {
+	      ++had_error;
+	      continue;
+	    }
+	  cp += n;
+	  /* Get canonical name. */
+	  n = strlen (tbuf) + 1;   /* For the \0.  */
+	  if (n > buflen)
+	    {
+	      ++had_error;
+	      continue;
+	    }
+	  strcpy (bp, tbuf);
+	  tname = bp;
+	  bp += n;
+	  linebuflen -= n;
+	  continue;
+	}
+      if (type != qtype)
+	{
+	  syslog (LOG_NOTICE | LOG_AUTH,
+	       "gethostby*.getanswer: asked for \"%s %s %s\", got type \"%s\"",
+		  qname, p_class (C_IN), p_type (qtype), p_type (type));
+	  cp += n;
+	  continue;			/* XXX - had_error++ ? */
+	}
+
+      switch (type)
+	{
+	case T_PTR:
+	  if (strcasecmp (tname, bp) != 0)
+	    {
+	      syslog (LOG_NOTICE | LOG_AUTH, AskedForGot, qname, bp);
+	      cp += n;
+	      continue;			/* XXX - had_error++ ? */
+	    }
+	  n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen);
+	  if (n < 0 || res_hnok (bp) == 0)
+	    {
+	      ++had_error;
+	      break;
+	    }
+#if MULTI_PTRS_ARE_ALIASES
+	  cp += n;
+	  if (haveanswer == 0)
+	    result->h_name = bp;
+	  else if (ap < &host_data->aliases[MAXALIASES-1])
+	    *ap++ = bp;
+	  else
+	    n = -1;
+	  if (n != -1)
+	    {
+	      n = strlen (bp) + 1;	/* for the \0 */
+	      bp += n;
+	      linebuflen -= n;
+	    }
+	  break;
+#else
+	  result->h_name = bp;
+	  if (_res.options & RES_USE_INET6)
+	    {
+	      n = strlen (bp) + 1;	/* for the \0 */
+	      bp += n;
+	      linebuflen -= n;
+	      map_v4v6_hostent (result, &bp, &linebuflen);
+	    }
+	  *h_errnop = NETDB_SUCCESS;
+	  return NSS_STATUS_SUCCESS;
+#endif
+	case T_A:
+	case T_AAAA:
+	  if (strcasecmp (result->h_name, bp) != 0)
+	    {
+	      syslog (LOG_NOTICE | LOG_AUTH, AskedForGot, result->h_name, bp);
+	      cp += n;
+	      continue;			/* XXX - had_error++ ? */
+	    }
+	  if (haveanswer)
+	    {
+	      if (n != result->h_length)
+		{
+		  cp += n;
+		  continue;
+		}
+	    }
+	  else
+	    {
+	      register int nn;
+
+	      result->h_name = bp;
+	      nn = strlen (bp) + 1;	/* for the \0 */
+	      bp += nn;
+	      linebuflen -= nn;
+	    }
+
+	  bp += sizeof (align) - ((u_long) bp % sizeof (align));
+
+	  if (n >= linebuflen)
+	    {
+	      ++had_error;
+	      continue;
+	    }
+	  if (hap >= &host_data->h_addr_ptrs[MAX_NR_ADDRS-1])
+	    {
+	      cp += n;
+	      continue;
+	    }
+	  bcopy (cp, *hap++ = bp, n);
+	  bp += n;
+	  cp += n;
+	  linebuflen -= n;
+	  break;
+	default:
+	  abort ();
+	}
+      if (had_error == 0)
+	++haveanswer;
+    }
+
+  if (haveanswer > 0)
+    {
+      *ap = NULL;
+      *hap = NULL;
+#if defined(RESOLVSORT)
+      /*
+       * Note: we sort even if host can take only one address
+       * in its return structures - should give it the "best"
+       * address in that case, not some random one
+       */
+      if (_res.nsort && haveanswer > 1 && qtype == T_A)
+	addrsort (host_data->h_addr_ptrs, haveanswer);
+#endif /*RESOLVSORT*/
+
+      if (result->h_name == NULL)
+	{
+	  n = strlen (qname) + 1;	/* For the \0.  */
+	  if (n > linebuflen)
+	    goto try_again;
+	  strcpy (bp, qname);
+	  result->h_name = bp;
+	  bp += n;
+	  linebuflen -= n;
+	}
+
+      if (_res.options & RES_USE_INET6)
+	map_v4v6_hostent (result, &bp, &linebuflen);
+      *h_errnop = NETDB_SUCCESS;
+      return NSS_STATUS_SUCCESS;
+    }
+try_again:
+  *h_errnop = TRY_AGAIN;
+  return NSS_STATUS_TRYAGAIN;
+}
diff --git a/nss/nss_dns/dns-network.c b/nss/nss_dns/dns-network.c
new file mode 100644
index 0000000000..b714128f1d
--- /dev/null
+++ b/nss/nss_dns/dns-network.c
@@ -0,0 +1,338 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* Parts of this file are plain copies of the file `getnetnamadr.c' from
+   the bind package and it has the following copyright.  */
+
+/* Copyright (c) 1993 Carlos Leandro and Rui Salgueiro
+ *      Dep. Matematica Universidade de Coimbra, Portugal, Europe
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ */
+/*
+ * Copyright (c) 1983, 1993
+ *      The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the University of
+ *      California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <ctype.h>
+#include <errno.h>
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "nsswitch.h"
+#include <arpa/inet.h>
+
+/* Maximum number of aliases we allow.  */
+#define MAX_NR_ALIASES	48
+
+
+#if PACKETSZ > 1024
+#define MAXPACKET       PACKETSZ
+#else
+#define MAXPACKET       1024
+#endif
+
+
+typedef enum
+{
+  BYADDR,
+  BYNAME
+} lookup_method;
+
+
+/* We need this time later.  */
+typedef union querybuf
+{
+  HEADER hdr;
+  u_char buf[MAXPACKET];
+} querybuf;
+
+
+/* Protortypes for local functions.  */
+static int getanswer_r (const querybuf *answer, int anslen,
+			struct netent *result, char *buffer, int buflen,
+			lookup_method net_i);
+
+
+int
+_nss_dns_getnetbyname_r (const char *name, struct netent *result,
+			 char *buffer, int buflen)
+{
+  /* Return entry for network with NAME.  */
+  querybuf net_buffer;
+  int anslen;
+  char *qbuf;
+
+  qbuf = strdupa (name);
+  anslen = res_search (qbuf, C_IN, T_PTR, (u_char *) &net_buffer,
+		       sizeof (querybuf));
+  if (anslen < 0)
+    /* Nothing found.  */
+    return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND;
+
+  return getanswer_r (&net_buffer, anslen, result, buffer, buflen, BYNAME);
+}
+
+
+int
+_nss_dns_getnetbyaddr_r (long net, int type, struct netent *result,
+			 char *buffer, int buflen)
+{
+  /* Return entry for network with NAME.  */
+  int status;
+  querybuf net_buffer;
+  unsigned int net_bytes[4];
+  char qbuf[MAXDNAME];
+  int cnt, anslen;
+  u_int32_t net2;
+
+  /* No net address lookup for IPv6 yet.  */
+  if (type != AF_INET)
+    return NSS_STATUS_UNAVAIL;
+
+  net2 = (u_int32_t) net;
+  for (cnt = 4; net2 != 0; net2 >>= 8)
+    net_bytes[--cnt] = net2 & 0xff;
+
+  switch (cnt)
+    {
+    case 3:
+      /* Class A network.  */
+      sprintf (qbuf, "0.0.0.%u.in-addr.arpa", net_bytes[3]);
+      break;
+    case 2:
+      /* Class B network.  */
+      sprintf (qbuf, "0.0.%u.%u.in-addr.arpa", net_bytes[3], net_bytes[2]);
+      break;
+    case 1:
+      /* Class C network.  */
+      sprintf (qbuf, "0.%u.%u.%u.in-addr.arpa", net_bytes[3], net_bytes[2],
+	       net_bytes[1]);
+      break;
+    case 0:
+      /* Class D - E network.  */
+      sprintf (qbuf, "%u.%u.%u.%u.in-addr.arpa", net_bytes[3], net_bytes[2],
+	       net_bytes[1], net_bytes[0]);
+      break;
+    }
+
+  anslen = res_query (qbuf, C_IN, T_PTR, (u_char *) &net_buffer,
+		      sizeof (querybuf));
+  if (anslen < 0)
+    /* Nothing found.  */
+    return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND;
+
+  status = getanswer_r (&net_buffer, anslen, result, buffer, buflen, BYADDR);
+  if (status == NSS_STATUS_SUCCESS)
+    {
+      /* Strip trailing zeros.  */
+      unsigned int u_net = net;	/* Maybe net should be unsigned?  */
+
+      while ((u_net & 0xff) == 0 && u_net != 0)
+	u_net >>= 8;
+      result->n_net = u_net;
+    }
+
+  return status;
+}
+
+
+#undef offsetof
+#define offsetof(Type, Member) ((size_t) &((Type *) NULL)->Member)
+
+static int
+getanswer_r (const querybuf *answer, int anslen, struct netent *result,
+	     char *buffer, int buflen, lookup_method net_i)
+{
+  /*
+   * Find first satisfactory answer
+   *
+   *      answer --> +------------+  ( MESSAGE )
+   *                 |   Header   |
+   *                 +------------+
+   *                 |  Question  | the question for the name server
+   *                 +------------+
+   *                 |   Answer   | RRs answering the question
+   *                 +------------+
+   *                 | Authority  | RRs pointing toward an authority
+   *                 | Additional | RRs holding additional information
+   *                 +------------+
+   */
+  struct net_data
+  {
+    char *aliases[MAX_NR_ALIASES];
+    char linebuffer[0];
+  } *net_data = (struct net_data *) buffer;
+  int linebuflen = buflen - offsetof (struct net_data, linebuffer);
+  const char *end_of_message = &answer->buf[anslen];
+  const HEADER *header_pointer = &answer->hdr;
+  /* #/records in the answer section.  */
+  int answer_count =  ntohs (header_pointer->ancount);
+  /* #/entries in the question section.  */
+  int question_count = ntohs (header_pointer->qdcount);
+  char *bp = net_data->linebuffer;
+  const char *cp = &answer->buf[HFIXEDSZ];
+  char **alias_pointer;
+  int have_answer;
+  char *ans;
+
+  if (question_count == 0)
+    /* FIXME: the Sun version uses for host name lookup an additional
+       parameter for pointing to h_errno.  this is missing here.
+       OSF/1 has a per-thread h_errno variable.  */
+    if (header_pointer->aa != 0)
+      {
+	h_errno = HOST_NOT_FOUND;
+	return NSS_STATUS_NOTFOUND;
+      }
+    else
+      {
+	h_errno = TRY_AGAIN;
+	return NSS_STATUS_TRYAGAIN;
+      }
+
+  /* Skip the question part.  */
+  while (question_count-- > 0)
+    cp += __dn_skipname (cp, end_of_message) + QFIXEDSZ;
+
+  alias_pointer = result->n_aliases = &net_data->aliases[0];
+  *alias_pointer = NULL;
+  have_answer = 0;
+  ans = NULL;
+
+  while (--answer_count >= 0 && cp < end_of_message)
+    {
+      int n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen);
+      int type, class;
+
+      if (n < 0 || res_dnok (bp) == 0)
+	break;
+      cp += n;
+      ans = strdupa (bp);
+      GETSHORT (type, cp);
+      GETSHORT (class, cp);
+      cp += INT32SZ;		/* TTL */
+      GETSHORT (n, cp);
+
+      if (class == C_IN && type == T_PTR)
+	{
+	  n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen);
+	  if (n < 0 || !res_hnok (bp))
+	    {
+	      /* XXX What does this mean?  The original form from bind
+		 returns NULL. Incrementing cp has no effect in any case.
+		 What should I return here. ??? */
+	      cp += n;
+	      return NSS_STATUS_UNAVAIL;
+	    }
+	  cp += n;
+	  *alias_pointer++ = bp;
+	  bp += strlen (bp) + 1;
+	  result->n_addrtype = class == C_IN ? AF_INET : AF_UNSPEC;
+	  ++have_answer;
+	}
+    }
+
+  if (have_answer)
+    {
+      char *tmp;
+      int len;
+      char *in, *cp, *rp, *wp;
+      int cnt, first_flag;
+
+      *alias_pointer = NULL;
+      switch (net_i)
+	{
+	case BYADDR:
+	  result->n_name = result->n_aliases[0];
+	  result->n_net = 0L;
+	  break;
+	case BYNAME:
+	  len = strlen (result->n_aliases[0]);
+	  tmp = (char *) alloca (len + 1);
+	  tmp[len] = 0;
+	  wp = &tmp[len - 1];
+
+	  rp = in = result->n_aliases[0];
+	  result->n_name = ans;
+
+	  first_flag = 1;
+	  for (cnt = 0; cnt < 4; ++cnt)
+	    {
+	      char *startp;
+
+	      startp = rp;
+	      while (*rp != '.')
+		++rp;
+	      if (rp - startp > 1 || *startp != '0' || !first_flag)
+		{
+		  first_flag = 0;
+		  if (cnt > 0)
+		    *wp-- = '.';
+		  cp = rp;
+		  while (cp > startp)
+		    *wp-- = *--cp;
+		}
+	      in = rp + 1;
+	    }
+
+	  result->n_net = inet_network (wp);
+	  break;
+	}
+
+      ++result->n_aliases;
+      return NSS_STATUS_SUCCESS;
+    }
+
+  /* XXX Really use global variable??? */
+  h_errno = TRY_AGAIN;
+  return NSS_STATUS_TRYAGAIN;
+}
diff --git a/nss/nss_files/files-XXX.c b/nss/nss_files/files-XXX.c
new file mode 100644
index 0000000000..40bb7df81e
--- /dev/null
+++ b/nss/nss_files/files-XXX.c
@@ -0,0 +1,221 @@
+/* Common code for file-based databases in nss_files module.
+Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <assert.h>
+#include <libc-lock.h>
+#include "nsswitch.h"
+
+/* These symbols are defined by the including source file:
+
+   ENTNAME -- database name of the structure and functions (hostent, pwent).
+   STRUCTURE -- struct name, define only if not ENTNAME (passwd, group).
+   DATAFILE -- string of the database file's name.
+
+   NEED_H_ERRNO - defined iff an arg `int *herrnop' is used.
+   MIDLINE_COMMENTS - defined iff # before \n terminates a database line.
+*/
+
+#define ENTNAME_r CONCAT(ENTNAME,_r)
+
+#ifdef NEED_H_ERRNO
+#define H_ERRNO_PROTO	, int *herrnop
+#define H_ERRNO_ARG	, herrnop
+#define H_ERRNO_SET(val) (*herrnop = (val))
+#else
+#define H_ERRNO_PROTO
+#define H_ERRNO_ARG
+#define H_ERRNO_SET(val) ((void) 0)
+#endif
+
+/* Locks the static variables in this file.  */
+__libc_lock_define_initialized (static, lock);
+
+/* Maintenance of the shared stream open on the database file.  */
+
+static FILE *stream;
+static int keep_stream;
+
+/* Open database file if not already opened.  */
+static int
+internal_setent (int stayopen)
+{
+  int status = NSS_STATUS_SUCCESS;
+
+  if (stream == NULL)
+    {
+      stream = fopen (DATAFILE, "r");
+
+      if (stream == NULL)
+	status = NSS_STATUS_UNAVAIL;
+    }
+  else
+    rewind (stream);
+
+  /* Remember STAYOPEN flag.  */
+  if (stream != NULL)
+    keep_stream |= stayopen;
+
+  return status;
+}
+
+
+/* Thread-safe, exported version of that.  */
+int
+CONCAT(_nss_files_set,ENTNAME) (int stayopen)
+{
+  int status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_setent (stayopen);
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+
+/* Close the database file.  */
+static void
+internal_endent (void)
+{
+  if (stream != NULL)
+    {
+      fclose (stream);
+      stream = NULL;
+    }
+
+  /* Reset STAYOPEN flag.  */
+  keep_stream = 0;
+}
+
+
+/* Thread-safe, exported version of that.  */
+int
+CONCAT(_nss_files_end,ENTNAME) (void)
+{
+  __libc_lock_lock (lock);
+
+  internal_endent ();
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+/* Parsing the database file into `struct STRUCTURE' data structures.  */
+
+static enum nss_status
+internal_getent (struct STRUCTURE *result,
+		 char *buffer, int buflen H_ERRNO_PROTO)
+{
+  char *p;
+  struct parser_data *data = (void *) buffer;
+  int linebuflen = buffer + buflen - data->linebuffer;
+
+  /* Someone called internal_setent before calling us, so if the
+     stream is not open now the file could not be opened.  */
+  if (stream == NULL)
+    {
+      H_ERRNO_SET (NETDB_INTERNAL);
+      return NSS_STATUS_UNAVAIL;
+    }
+
+  if (buflen < sizeof *data + 1)
+    {
+      errno = ERANGE;
+      return NSS_STATUS_NOTFOUND;
+    }
+
+  do
+    {
+      p = fgets (data->linebuffer, linebuflen, stream);
+      if (p == NULL)
+	{
+	  /* End of file or read error.  */
+	  H_ERRNO_SET (HOST_NOT_FOUND);
+	  return NSS_STATUS_NOTFOUND;
+	}
+
+      /* Skip leading blanks.  */
+      while (isspace (*p))
+	++p;
+    } while (*p == '\0' || *p == '#' ||	/* Ignore empty and comment lines.  */
+	     /* Parse the line.  If it is invalid, loop to
+		get the next line of the file to parse.  */
+	     ! parse_line (p, result, data, buflen));
+
+  /* Filled in RESULT with the next entry from the database file.  */
+  return NSS_STATUS_SUCCESS;
+}
+
+
+/* Return the next entry from the database file, doing locking.  */
+int
+CONCAT(_nss_files_get,ENTNAME_r) (struct STRUCTURE *result,
+				  char *buffer, int buflen H_ERRNO_PROTO)
+{
+  /* Return next entry in host file.  */
+  int status;
+
+  __libc_lock_lock (lock);
+
+  status = internal_getent (result, buffer, buflen H_ERRNO_ARG);
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+/* Macro for defining lookup functions for this file-based database.
+
+   NAME is the name of the lookup; e.g. `hostbyname'.
+
+   PROTO describes the arguments for the lookup key;
+   e.g. `const char *hostname'.
+
+   BREAK_IF_MATCH is a block of code which compares `struct STRUCTURE *result'
+   to the lookup key arguments and does `break;' if they match.  */
+
+#define DB_LOOKUP(name, break_if_match, proto...)			      \
+enum nss_status								      \
+_nss_files_get##name##_r (proto,					      \
+			  struct STRUCTURE *result,			      \
+			  char *buffer, int buflen H_ERRNO_PROTO)	      \
+{									      \
+  enum nss_status status;						      \
+									      \
+  __libc_lock_lock (lock);						      \
+									      \
+  /* Reset file pointer to beginning or open file.  */			      \
+  internal_setent (keep_stream);					      \
+									      \
+  while ((status = internal_getent (result, buffer, buflen H_ERRNO_ARG))      \
+	 == NSS_STATUS_SUCCESS)						      \
+    { break_if_match }							      \
+									      \
+  if (! keep_stream)							      \
+    internal_endent ();							      \
+									      \
+  __libc_lock_unlock (lock);						      \
+									      \
+  return status;							      \
+}
diff --git a/nss/nss_files/files-grp.c b/nss/nss_files/files-grp.c
new file mode 100644
index 0000000000..6d528a6df2
--- /dev/null
+++ b/nss/nss_files/files-grp.c
@@ -0,0 +1,49 @@
+/* Group file parser in nss_files module.
+Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <grp.h>
+
+#define STRUCTURE	group
+#define ENTNAME		grent
+#define DATAFILE	"/etc/group"
+struct grent_data {};
+
+#define TRAILING_LIST_MEMBER		gr_mem
+#define TRAILING_LIST_SEPARATOR_P(c)	((c) == ',')
+#include "files-parse.c"
+LINE_PARSER
+(
+ STRING_FIELD (result->gr_name, ISCOLON, 0);
+ STRING_FIELD (result->gr_passwd, ISCOLON, 0);
+ INT_FIELD (result->gr_gid, ISCOLON, 0, 10,);
+)
+
+#include "files-XXX.c"
+
+DB_LOOKUP (grnam,
+	   {
+	     if (! strcmp (name, result->gr_name))
+	       break;
+	   }, const char *name)
+
+DB_LOOKUP (grgid,
+	   {
+	     if (result->gr_gid == gid)
+	       break;
+	   }, gid_t gid)
diff --git a/nss/nss_files/files-hosts.c b/nss/nss_files/files-hosts.c
new file mode 100644
index 0000000000..dad818c941
--- /dev/null
+++ b/nss/nss_files/files-hosts.c
@@ -0,0 +1,111 @@
+/* Hosts file parser in nss_files module.
+Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <netdb.h>
+#include <resolv.h>
+
+
+/* Get implementation for some internal functions.  */
+#include "../resolv/mapv4v6addr.h"
+#include "../resolv/mapv4v6hostent.h"
+
+
+#define ENTNAME		hostent
+#define DATAFILE	_PATH_HOSTS
+
+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 "files-parse.c"
+LINE_PARSER
+({
+  char *addr;
+
+  STRING_FIELD (addr, isspace, 1);
+
+  /* Parse address.  */
+  if ((_res.options & RES_USE_INET6)
+      && inet_pton (AF_INET6, addr, entdata->host_addr) > 0)
+    {
+      result->h_addrtype = AF_INET6;
+      result->h_length = IN6ADDRSZ;
+    }
+  else if (inet_pton (AF_INET, addr, entdata->host_addr) > 0)
+    {
+      if (_res.options & RES_USE_INET6)
+	{
+	  map_v4v6_address ((char *) entdata->host_addr,
+			    (char *) entdata->host_addr);
+	  result->h_addrtype = AF_INET6;
+	  result->h_length = IN6ADDRSZ;
+	}
+      else
+	{
+	  result->h_addrtype = AF_INET;
+	  result->h_length = INADDRSZ;
+	}
+    }
+  else
+    /* Illegal address: ignore line.  */
+    return 0;
+
+  /* Store a pointer to the addressin the expected form.  */
+  entdata->h_addr_ptrs[0] = entdata->host_addr;
+  entdata->h_addr_ptrs[1] = NULL;
+  result->h_addr_list = entdata->h_addr_ptrs;
+
+  /* If we need the host entry in IPv6 form change it now.  */
+  if (_res.options & RES_USE_INET6)
+    {
+      char *bufptr = data->linebuffer;
+      int buflen = (char *) data + datalen - bufptr;
+      map_v4v6_hostent (result, &bufptr, &buflen);
+    }
+
+  STRING_FIELD (result->h_name, isspace, 1);
+})
+
+#include "files-XXX.c"
+
+DB_LOOKUP (hostbyname,
+	   {
+	     char **ap;
+	     if (! strcmp (name, result->h_name))
+	       break;
+	     for (ap = result->h_aliases; *ap; ++ap)
+	       if (! strcmp (name, *ap))
+		 break;
+	     if (*ap)
+	       break;
+	   }, const char *name)
+
+DB_LOOKUP (hostbyaddr,
+	   {
+	     if (result->h_addrtype == type && result->h_length == len &&
+		 ! memcmp (addr, result->h_addr_list[0], len))
+	       break;
+	   }, const char *addr, int len, int type)
diff --git a/nss/nss_files/files-network.c b/nss/nss_files/files-network.c
new file mode 100644
index 0000000000..504c420b04
--- /dev/null
+++ b/nss/nss_files/files-network.c
@@ -0,0 +1,54 @@
+/* Networks file parser in nss_files module.
+Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
+
+#define ENTNAME		netent
+#define DATAFILE	_PATH_NETWORKS
+
+struct netent_data {};
+
+#define TRAILING_LIST_MEMBER		n_aliases
+#define TRAILING_LIST_SEPARATOR_P	isspace
+#include "files-parse.c"
+LINE_PARSER
+({
+  char *addr;
+
+  STRING_FIELD (result->n_name, isspace, 1);
+
+  STRING_FIELD (addr, isspace, 1);
+  result->n_net = inet_network (addr);
+
+})
+
+#include "files-XXX.c"
+
+DB_LOOKUP (netbyname,
+	   LOOKUP_NAME (n_name, n_aliases),
+	   const char *name)
+
+DB_LOOKUP (netbyaddr,
+	   {
+	     if (result->n_addrtype == type && result->n_net == net)
+	       /* Bingo!  */
+	       break;
+	   }, int type, unsigned long int net)
diff --git a/nss/nss_files/files-parse.c b/nss/nss_files/files-parse.c
new file mode 100644
index 0000000000..a93bee1ab3
--- /dev/null
+++ b/nss/nss_files/files-parse.c
@@ -0,0 +1,171 @@
+/* Common code for file-based database parsers in nss_files module.
+Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+
+
+#define CONCAT(a,b) CONCAT1(a,b)
+#define CONCAT1(a,b) a##b
+
+#ifndef STRUCTURE
+#define STRUCTURE ENTNAME
+#endif
+
+
+struct parser_data
+  {
+    struct CONCAT(ENTNAME,_data) entdata;
+    char linebuffer[0];
+  };
+
+#define LINE_PARSER(BODY)						      \
+static inline int							      \
+parse_line (char *line, struct STRUCTURE *result,			      \
+	    struct parser_data *data, int datalen)			      \
+{									      \
+  struct CONCAT(ENTNAME,_data) *const entdata __attribute__ ((unused))	      \
+    = &data->entdata;		      					      \
+  BODY;									      \
+  TRAILING_LIST_PARSER;							      \
+  return 1;								      \
+}
+
+
+/* Comments can come mid-line; trim the line at the first # seen.  */
+#define MIDLINE_COMMENTS						      \
+  {									      \
+    char *p = strchr (line, '#');					      \
+    if (p)								      \
+      *p = '\0';							      \
+  }
+
+#define STRING_FIELD(variable, terminator_p, swallow)			      \
+  {									      \
+    variable = line;							      \
+    while (!terminator_p (*line))					      \
+      if (*++line == '\0')						      \
+	return 0;							      \
+    *line = '\0';							      \
+    do									      \
+      ++line;								      \
+    while (swallow && terminator_p (*line));				      \
+  }
+
+#define INT_FIELD(variable, terminator_p, swallow, base, convert)	      \
+  {									      \
+    char *endp;								      \
+    variable = convert (strtol (line, &endp, base));			      \
+    if (endp == line)							      \
+      return 0;								      \
+    else if (terminator_p (*endp))					      \
+      do								      \
+	++endp;								      \
+      while (swallow && terminator_p (*endp));				      \
+    else if (*endp != '\0')						      \
+      return 0;								      \
+    line = endp;							      \
+  }
+
+#define ISCOLON(c) ((c) == ':')
+
+
+#ifndef TRAILING_LIST_MEMBER
+#define TRAILING_LIST_PARSER /* Nothing to do.  */
+#else
+
+#define TRAILING_LIST_PARSER						      \
+{									      \
+  char **list = parse_list (line, data, datalen);			      \
+  if (list)								      \
+    result->TRAILING_LIST_MEMBER = list;				      \
+  else 									      \
+    return 0;								      \
+}
+
+static inline char **
+parse_list (char *line, struct parser_data *data, int datalen)
+{
+  char *eol, **list, **p;
+
+  /* Find the end of the line buffer.  */
+  eol = strchr (line, '\0');
+  /* Adjust the pointer so it is aligned for storing pointers.  */
+  eol += (eol - (char *) 0) % __alignof__ (char *);
+  /* We will start the storage here for the vector of pointers.  */
+  list = (char **) eol;
+
+  p = list;
+  while (1)
+    {
+      char *elt;
+
+      if ((char *) &p[1] - (char *) data > datalen)
+	{
+	  /* We cannot fit another pointer in the buffer.  */
+	  errno = ERANGE;
+	  return NULL;
+	}
+      if (*line == '\0')
+	break;
+
+      elt = line;
+      while (1)
+	{
+	  if (TRAILING_LIST_SEPARATOR_P (*line))
+	    {
+	      *p++ = elt;
+	      *line = '\0';
+	      do
+		++line;
+	      while (TRAILING_LIST_SEPARATOR_P (*line));
+	    }
+	  else if (*line == '\0' || *line == '\n')
+	    {
+	      /* End of the line.  */
+	      if (line > elt)
+		/* Last element.  */
+		*p++ = elt;
+	      *line = '\0';
+	      break;
+	    }
+	  else
+	    ++line;
+	}
+    }
+  *p = NULL;
+
+  return list;
+}
+
+#define LOOKUP_NAME(nameelt, aliaselt)					      \
+{									      \
+  char **ap;								      \
+  if (! strcmp (name, result->nameelt))					      \
+    break;								      \
+  for (ap = result->aliaselt; *ap; ++ap)				      \
+    if (! strcmp (name, *ap))						      \
+      break;								      \
+  if (*ap)								      \
+    break;								      \
+}
+
+#endif
diff --git a/nss/nss_files/files-proto.c b/nss/nss_files/files-proto.c
new file mode 100644
index 0000000000..d67f8db8f6
--- /dev/null
+++ b/nss/nss_files/files-proto.c
@@ -0,0 +1,48 @@
+/* Protocols file parser in nss_files module.
+Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <netdb.h>
+
+
+#define ENTNAME		protoent
+#define DATAFILE	_PATH_PROTOCOLS
+
+struct protoent_data {};
+
+#define TRAILING_LIST_MEMBER		p_aliases
+#define TRAILING_LIST_SEPARATOR_P	isspace
+#include "files-parse.c"
+LINE_PARSER
+(
+ MIDLINE_COMMENTS;
+ STRING_FIELD (result->p_name, isspace, 1);
+ INT_FIELD (result->p_proto, isspace, 1, 10,);
+ )
+
+#include "files-XXX.c"
+
+DB_LOOKUP (protobyname,
+	   LOOKUP_NAME (p_name, p_aliases),
+	   const char *name)
+
+DB_LOOKUP (protobynumber,
+	   {
+	     if (result->p_proto == proto)
+	       break;
+	   }, int proto)
diff --git a/nss/nss_files/files-pwd.c b/nss/nss_files/files-pwd.c
new file mode 100644
index 0000000000..4b6a4b737f
--- /dev/null
+++ b/nss/nss_files/files-pwd.c
@@ -0,0 +1,54 @@
+/* User file parser in nss_files module.
+Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <pwd.h>
+
+#define STRUCTURE	passwd
+#define ENTNAME		pwent
+#define DATAFILE	"/etc/passwd"
+struct pwent_data {};
+
+#include "files-parse.c"
+LINE_PARSER
+({
+  STRING_FIELD (result->pw_name, ISCOLON, 0);
+  STRING_FIELD (result->pw_passwd, ISCOLON, 0);
+  INT_FIELD (result->pw_uid, ISCOLON, 0, 10,);
+  INT_FIELD (result->pw_gid, ISCOLON, 0, 10,);
+  STRING_FIELD (result->pw_gecos, ISCOLON, 0);
+  STRING_FIELD (result->pw_dir, ISCOLON, 0);
+  result->pw_shell = line;
+  line = strchr (line, '\n');
+  if (line)
+    *line = '\0';
+})
+
+#include "files-XXX.c"
+
+DB_LOOKUP (pwnam,
+	   {
+	     if (! strcmp (name, result->pw_name))
+	       break;
+	   }, const char *name)
+
+DB_LOOKUP (pwuid,
+	   {
+	     if (result->pw_uid == uid)
+	       break;
+	   }, uid_t uid)
diff --git a/nss/nss_files/files-rpc.c b/nss/nss_files/files-rpc.c
new file mode 100644
index 0000000000..fef0ff88b1
--- /dev/null
+++ b/nss/nss_files/files-rpc.c
@@ -0,0 +1,48 @@
+/* SunRPC program number file parser in nss_files module.
+Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <rpc/netdb.h>
+
+
+#define ENTNAME		rpcent
+#define DATAFILE	"/etc/rpc"
+
+struct rpcent_data {};
+
+#define TRAILING_LIST_MEMBER		r_aliases
+#define TRAILING_LIST_SEPARATOR_P	isspace
+#include "files-parse.c"
+LINE_PARSER
+(
+ MIDLINE_COMMENTS;
+ STRING_FIELD (result->r_name, isspace, 1);
+ INT_FIELD (result->r_number, isspace, 1, 10,);
+ )
+
+#include "files-XXX.c"
+
+DB_LOOKUP (rpcbyname,
+	   LOOKUP_NAME (r_name, r_aliases),
+	   const char *name)
+
+DB_LOOKUP (rpcbynumber,
+	   {
+	     if (result->r_number == number)
+	       break;
+	   }, int number)
diff --git a/nss/nss_files/files-service.c b/nss/nss_files/files-service.c
new file mode 100644
index 0000000000..3bcb48787a
--- /dev/null
+++ b/nss/nss_files/files-service.c
@@ -0,0 +1,51 @@
+/* Services file parser in nss_files module.
+Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <netinet/in.h>
+#include <netdb.h>
+
+
+#define ENTNAME		servent
+#define DATAFILE	_PATH_SERVICES
+
+struct servent_data {};
+
+#define TRAILING_LIST_MEMBER		s_aliases
+#define TRAILING_LIST_SEPARATOR_P	isspace
+#include "files-parse.c"
+#define ISSLASH(c) ((c) == '/')
+LINE_PARSER
+(
+ MIDLINE_COMMENTS;
+ STRING_FIELD (result->s_name, isspace, 1);
+ INT_FIELD (result->s_port, ISSLASH, 10, 0, htons);
+ STRING_FIELD (result->s_proto, isspace, 1);
+ )
+
+#include "files-XXX.c"
+
+DB_LOOKUP (servbyname,
+	   LOOKUP_NAME (s_name, s_aliases),
+	   const char *name)
+
+DB_LOOKUP (servbyport,
+	   {
+	     if (result->s_port == port)
+	       break;
+	   }, int port)
diff --git a/nss/nsswitch.c b/nss/nsswitch.c
new file mode 100644
index 0000000000..4c2ccf692f
--- /dev/null
+++ b/nss/nsswitch.c
@@ -0,0 +1,588 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include <ctype.h>
+#include <dlfcn.h>
+#include <netdb.h>
+#include <libc-lock.h>
+#include <search.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "nsswitch.h"
+#include "../elf/link.h"	/* We need some help from ld.so.  */
+
+/* Prototypes for the local functions.  */
+static void nss_init (void);
+static void *nss_lookup_function (service_user *ni, const char *fct_name);
+static int nss_find_entry (struct entry **knownp, const char *key,
+			   void **valp);
+static void nss_insert_entry (struct entry **knownp, const char *key,
+			      void *val);
+static name_database *nss_parse_file (const char *fname);
+static name_database_entry *nss_getline (char *line);
+static service_library *nss_new_service (name_database *database,
+					 const char *name);
+
+
+__libc_lock_define_initialized (static, lock);
+
+
+/* Global variable.  */
+struct __res_state _res;
+
+
+/* Known aliases for service names.  */
+static struct {
+  const char *alias;
+  const char *value;
+} service_alias[] =
+{
+  { "nis+", "nisplus" },
+  { "yp", "nis" }
+};
+
+
+/* Nonzero if the sevices are already initialized.  */
+static int nss_initialized;
+
+
+/* The root of the whole data base.  */
+static name_database *service_table;
+
+
+static void
+nss_init (void)
+{
+  /* Prevent multiple threads to change the service table.  */
+  __libc_lock_lock (lock);
+
+  if (service_table == NULL)
+    service_table = nss_parse_file (_PATH_NSSWITCH_CONF);
+
+  __libc_lock_unlock (lock);
+}
+
+
+/* -1 == database not found
+    0 == database entry pointer stored */
+int
+__nss_database_lookup (const char *database, service_user **ni)
+{
+  /* Return first `service_user' entry for DATABASE.
+     XXX Will use perfect hashing function for known databases.  */
+  name_database_entry *entry;
+
+  /* Test whether configuration data is available.  */
+  if (service_table == NULL)
+    {
+      if (nss_initialized == 0)
+	nss_init ();
+
+      if (service_table == NULL)
+	return -1;
+    }
+
+  /* XXX Could use some faster mechanism here.  But each database is
+     only requested once and so this might not be critical.  */
+  for (entry = service_table->entry; entry != NULL; entry = entry->next)
+    if (strcmp (database, entry->name) == 0)
+      break;
+
+  if (entry == NULL || (*ni = entry->service) == NULL)
+    return -1;
+
+  return 0;
+}
+
+
+/* -1 == not found
+    0 == adjusted for next function */
+int
+__nss_lookup (service_user **ni, const char *fct_name, void **fctp)
+{
+  *fctp = nss_lookup_function (*ni, fct_name);
+
+  while (*fctp == NULL
+	 && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
+	 && (*ni)->next != NULL)
+    {
+      *ni = (*ni)->next;
+
+      *fctp = nss_lookup_function (*ni, fct_name);
+    }
+
+  return *fctp != NULL ? 0 : -1;
+}
+
+
+/* -1 == not found
+    0 == adjusted for next function
+    1 == finished */
+int
+__nss_next (service_user **ni, const char *fct_name, void **fctp, int status,
+	    int all_values)
+{
+  if (all_values)
+    {
+      if (nss_next_action (*ni, NSS_STATUS_TRYAGAIN) == NSS_ACTION_RETURN
+	  && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_RETURN
+	  && nss_next_action (*ni, NSS_STATUS_NOTFOUND) == NSS_ACTION_RETURN
+	  && nss_next_action (*ni, NSS_STATUS_SUCCESS) == NSS_ACTION_RETURN)
+	return 1;
+    }
+  else
+    {
+      /* This is really only for debugging.  */
+       if (NSS_STATUS_TRYAGAIN > status || status > NSS_STATUS_SUCCESS)
+	 __libc_fatal ("illegal status in " __FUNCTION__);
+
+       if (nss_next_action (*ni, status) == NSS_ACTION_RETURN)
+	 return 1;
+    }
+
+  if ((*ni)->next == NULL)
+    return -1;
+
+  do
+    {
+      *ni = (*ni)->next;
+
+      *fctp = nss_lookup_function (*ni, fct_name);
+    }
+  while (*fctp == NULL
+	 && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE
+	 && (*ni)->next != NULL);
+
+  return *fctp != NULL ? 0 : -1;
+}
+
+
+static int
+nss_dlerror_run (void (*operate) (void))
+{
+  const char *last_errstring = NULL;
+  const char *last_object_name = NULL;
+
+  (void) _dl_catch_error (&last_errstring, &last_object_name, operate);
+
+  return last_errstring != NULL;
+}
+
+
+static void *
+nss_lookup_function (service_user *ni, const char *fct_name)
+{
+  void *result;
+
+  /* Determine whether current function is loaded.  */
+  if (nss_find_entry (&ni->known, fct_name, &result) >= 0)
+    return result;
+
+  /* If we failed to allocate the needed data structures for the
+     service return an error.  This should only happen when we are out
+     of memory.  */
+  if (ni->library == NULL)
+    return NULL;
+
+  /* We now modify global data.  Protect it.  */
+  __libc_lock_lock (lock);
+
+  if (ni->library->lib_handle == NULL)
+    {
+      /* Load the shared library.  */
+      size_t shlen = (7 + strlen (ni->library->name) + 3
+		      + sizeof (NSS_SHLIB_REVISION));
+      char shlib_name[shlen];
+
+      void do_open (void)
+	{
+	  /* The used function is found in GNU ld.so.  XXX The first
+	     argument to _dl_open used to be `_dl_loaded'.  But this
+	     does (currently) not work.  */
+	  ni->library->lib_handle = _dl_open (shlib_name, RTLD_LAZY);
+	}
+
+      /* Construct name.  */
+      __stpcpy (__stpcpy (__stpcpy (shlib_name, "libnss_"), ni->library->name),
+		".so" NSS_SHLIB_REVISION);
+
+      if (nss_dlerror_run (do_open) != 0)
+	/* Failed to load the library.  */
+	ni->library->lib_handle = (void *) -1;
+    }
+
+  if (ni->library->lib_handle == (void *) -1)
+    /* Library not found => function not found.  */
+    result = NULL;
+  else
+    {
+      /* Get the desired function.  Again,  GNU ld.so magic ahead.  */
+      size_t namlen = (5 + strlen (ni->library->name) + 1
+		       + strlen (fct_name) + 1);
+      char name[namlen];
+      struct link_map *map = ni->library->lib_handle;
+      Elf32_Addr loadbase;
+      const Elf32_Sym *ref = NULL;
+      void get_sym (void)
+	{
+	  struct link_map *scope[2] = { map, NULL };
+	  loadbase = _dl_lookup_symbol (name, &ref, scope, map->l_name, 0, 0);
+	}
+
+      __stpcpy (__stpcpy (__stpcpy (__stpcpy (name, "_nss_"),
+				    ni->library->name),
+			  "_"),
+		fct_name);
+
+      result = (nss_dlerror_run (get_sym)
+		? NULL : (void *) (loadbase + ref->st_value));
+    }
+
+  /* Remember function pointer for the usage.  */
+  nss_insert_entry (&ni->known, fct_name, result);
+
+  /* Remove the lock.  */
+  __libc_lock_unlock (lock);
+
+  return result;
+}
+
+
+static int
+known_compare (const void *p1, const void *p2)
+{
+  known_function *v1 = (known_function *) p1;
+  known_function *v2 = (known_function *) p2;
+
+  return strcmp (v1->fct_name, v2->fct_name);
+}
+
+
+static int
+nss_find_entry (struct entry **knownp, const char *key, void **valp)
+{
+  known_function looking_for = { fct_name: key };
+  struct entry **found;
+
+  found = __tfind (&looking_for, (const void **) knownp, known_compare);
+
+  if (found == NULL)
+    return -1;
+
+  *valp = ((known_function *) (*found)->key)->fct_ptr;
+
+  return 0;
+}
+
+
+static void
+nss_insert_entry (struct entry **knownp, const char *key, void *val)
+{
+  known_function *to_insert;
+
+  to_insert = (known_function *) malloc (sizeof (known_function));
+  if (to_insert == NULL)
+    return;
+
+  to_insert->fct_name = key;
+  to_insert->fct_ptr = val;
+
+  __tsearch (to_insert, (void **) knownp, known_compare);
+}
+
+
+static name_database *
+nss_parse_file (const char *fname)
+{
+  FILE *fp;
+  name_database *result;
+  name_database_entry *last;
+  char *line;
+  size_t len;
+
+  /* Open the configuration file.  */
+  fp = fopen (fname, "r");
+  if (fp == NULL)
+    return NULL;
+
+  result = (name_database *) malloc (sizeof (name_database));
+  if (result == NULL)
+    return NULL;
+
+  result->entry = NULL;
+  result->library = NULL;
+  last = NULL;
+  line = NULL;
+  len = 0;
+  do
+    {
+      name_database_entry *this;
+      ssize_t n;
+      char *cp;
+
+      n = getline (&line, &len, fp);
+      if (n < 0)
+	break;
+      if (line[n - 1] == '\n')
+	line[n - 1] = '\0';
+
+      /* Because the file format does not know any form of quoting we
+	 can search forward for the next '#' character and if found
+	 make it terminating the line.  */
+      cp = strchr (line, '#');
+      if (cp != NULL)
+	*cp = '\0';
+
+      /* If the line is blank it is ignored.  */
+      if (line[0] == '\0')
+	continue;
+
+      /* Each line completely specifies the actions for a database.  */
+      this = nss_getline (line);
+      if (this != NULL)
+	{
+	  if (last != NULL)
+	    last->next = this;
+	  else
+	    result->entry = this;
+
+	  last = this;
+	}
+    }
+  while (!feof (fp));
+
+  /* Free the buffer.  */
+  free (line);
+  /* Close configuration file.  */
+  fclose (fp);
+
+  /* Now create for each service we could use an entry in LIBRARY list.  */
+  for (last = result->entry; last != NULL; last = last->next)
+    {
+      service_user *runp;
+
+      for (runp = last->service; runp != NULL; runp = runp->next)
+	runp->library = nss_new_service (result, runp->name);
+    }
+
+  return result;
+}
+
+
+static name_database_entry *
+nss_getline (char *line)
+{
+  const char *name;
+  name_database_entry *result;
+  service_user *last;
+
+  /* Ignore leading white spaces.  ATTENTION: this is different from
+     what is implemented in Solaris.  The Solaris man page says a line
+     beginning with a white space character is ignored.  We regard
+     this as just another misfeature in Solaris.  */
+  while (isspace (line[0]))
+    ++line;
+
+  /* Recognize `<database> ":"'.  */
+  name = line;
+  while (line[0] != '\0' && !isspace (line[0]) && line[0] != ':')
+    ++line;
+  if (line[0] == '\0' || name == line)
+    /* Syntax error.  */
+    return NULL;
+  *line++ = '\0';
+
+  result = (name_database_entry *) malloc (sizeof (name_database_entry));
+  if (result == NULL)
+    return NULL;
+
+  result->name = strdup (name);
+  if (result->name == NULL)
+    {
+      free (result);
+      return NULL;
+    }
+  result->service = NULL;
+  result->next = NULL;
+  last = NULL;
+
+  /* Read the source names: `<source> ( "[" <status> "=" <action> "]" )*'.  */
+  while (1)
+    {
+      service_user *new_service;
+      size_t n;
+
+      while (isspace (line[0]))
+	++line;
+      if (line[0] == '\0')
+	/* No source specified.  */
+	return result;
+
+      /* Read <source> identifier.  */
+      name = line;
+      while (line[0] != '\0' && !isspace (line[0]) && line[0] != '[')
+	++line;
+      if (name == line)
+	return result;
+
+
+      new_service = (service_user *) malloc (sizeof (service_user));
+      if (new_service == NULL)
+	return result;
+
+      /* Test whether the source name is one of the aliases.  */
+      for (n = 0; n < sizeof (service_alias) / sizeof (service_alias[0]); ++n)
+	if (strncmp (service_alias[n].alias, name, line - name) == 0
+	    && service_alias[n].alias[line - name] == '\0')
+	  break;
+
+      if (n < sizeof (service_alias) / sizeof (service_alias[0]))
+	new_service->name = service_alias[n].value;
+      else
+	{
+	  char *source = (char *) malloc (line - name + 1);
+	  if (source == NULL)
+	    {
+	      free (new_service);
+	      return result;
+	    }
+	  memcpy (source, name, line - name);
+	  source[line - name] = '\0';
+
+	  new_service->name = source;
+	}
+
+      /* Set default actions.  */
+      new_service->actions[2 + NSS_STATUS_TRYAGAIN] = NSS_ACTION_CONTINUE;
+      new_service->actions[2 + NSS_STATUS_UNAVAIL] = NSS_ACTION_CONTINUE;
+      new_service->actions[2 + NSS_STATUS_NOTFOUND] = NSS_ACTION_CONTINUE;
+      new_service->actions[2 + NSS_STATUS_SUCCESS] = NSS_ACTION_RETURN;
+      new_service->library = NULL;
+      new_service->known = NULL;
+      new_service->next = NULL;
+
+      while (isspace (line[0]))
+	++line;
+
+      if (line[0] == '[')
+	{
+	  int status;
+
+	  /* Read criterions.  */
+	  do
+	    ++line;
+	  while (line[0] != '\0' && isspace (line[0]));
+
+	  do
+	    {
+	      /* Read status name.  */
+	      name = line;
+	      while (line[0] != '\0' && !isspace (line[0]) && line[0] != '='
+		     && line[0] != ']')
+		++line;
+
+	      /* Compare with known statii.  */
+	      if (line - name == 7)
+		{
+		  if (strncasecmp (name, "SUCCESS", 7) == 0)
+		    status = NSS_STATUS_SUCCESS;
+		  else if (strncasecmp (name, "UNAVAIL", 7) == 0)
+		    status = NSS_STATUS_UNAVAIL;
+		  else
+		    return result;
+		}
+	      else if (line - name == 8)
+		{
+		  if (strncasecmp (name, "NOTFOUND", 8) == 0)
+		    status = NSS_STATUS_NOTFOUND;
+		  else if (strncasecmp (name, "TRYAGAIN", 8) == 0)
+		    status = NSS_STATUS_TRYAGAIN;
+		  else
+		    return result;
+		}
+	      else
+		return result;
+
+	      while (isspace (line[0]))
+		++line;
+	      if (line[0] != '=')
+		return result;
+	      do
+		++line;
+	      while (isspace (line[0]));
+
+	      name = line;
+	      while (line[0] != '\0' && !isspace (line[0]) && line[0] != '='
+		     && line[0] != ']')
+		++line;
+
+	      if (line - name == 6 && strncasecmp (name, "RETURN", 6) == 0)
+		new_service->actions[2 + status] = NSS_ACTION_RETURN;
+	      else if (line - name == 8
+		       && strncasecmp (name, "CONTINUE", 8) == 0)
+		new_service->actions[2 + status] = NSS_ACTION_CONTINUE;
+	      else
+		return result;
+
+	      /* Match white spaces.  */
+	      while (isspace (line[0]))
+		++line;
+	    }
+	  while (line[0] != ']');
+
+	  /* Skip the ']'.  */
+	  ++line;
+	}
+
+      if (last == NULL)
+	result->service = new_service;
+      else
+	last->next = new_service;
+      last = new_service;
+    }
+  /* NOTREACHED */
+  return NULL;
+}
+
+
+static service_library *
+nss_new_service (name_database *database, const char *name)
+{
+  service_library **currentp = &database->library;
+
+  while (*currentp != NULL)
+    {
+      if (strcmp ((*currentp)->name, name) == 0)
+	return *currentp;
+      currentp = &(*currentp)->next;
+    }
+
+  /* We have to add the new service.  */
+  *currentp = (service_library *) malloc (sizeof (service_library));
+  if (*currentp == NULL)
+    return NULL;
+
+  (*currentp)->name = name;
+  (*currentp)->lib_handle = NULL;
+  (*currentp)->next = NULL;
+
+  return *currentp;
+}
diff --git a/nss/nsswitch.h b/nss/nsswitch.h
new file mode 100644
index 0000000000..f597a58860
--- /dev/null
+++ b/nss/nsswitch.h
@@ -0,0 +1,138 @@
+/* Copyright (C) 1996 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#ifndef _NSSWITCH_H
+#define _NSSWITCH_H	1
+
+/* This is an *internal* header.  */
+
+#include <arpa/nameser.h>
+#include <netinet/in.h>
+#include <resolv.h>
+#include <search.h>
+
+
+/* Revision number of NSS interface (must be a string).  */
+#define NSS_SHLIB_REVISION ".1"
+
+
+/* Possible results of lookup using a nss_* function.  */
+enum nss_status
+{
+  NSS_STATUS_TRYAGAIN = -2,
+  NSS_STATUS_UNAVAIL,
+  NSS_STATUS_NOTFOUND,
+  NSS_STATUS_SUCCESS,
+};
+
+
+/* Actions performed after lookup finished.  */
+typedef enum
+{
+  NSS_ACTION_CONTINUE,
+  NSS_ACTION_RETURN
+} lookup_actions;
+
+
+typedef struct service_library
+{
+  /* Name of service (`files', `dns', `nis', ...).  */
+  const char *name;
+  /* Pointer to the loaded shared library.  */
+  void *lib_handle;
+  /* And the link to the next entry.  */
+  struct service_library *next;
+} service_library;
+
+
+/* For mappng a function name to a function pointer.  */
+typedef struct
+{
+  const char *fct_name;
+  void *fct_ptr;
+} known_function;
+
+
+typedef struct service_user
+{
+  /* Name of the service (`files', `dns', `nis', ...).  */
+  const char *name;
+  /* Action according to result.  */
+  lookup_actions actions[4];
+  /* Link to the underlying library object.  */
+  service_library *library;
+  /* Collection of known functions.  */
+  struct entry *known;
+  /* And the link to the next entry.  */
+  struct service_user *next;
+} service_user;
+
+/* To access the action based on the status value use this macro.  */
+#define nss_next_action(ni, status) ((ni)->actions[2 + status])
+
+
+typedef struct name_database_entry
+{
+  /* Name of the database.  */
+  const char *name;
+  /* List of service to be used.  */
+  service_user *service;
+  /* And the link to the next entry.  */
+  struct name_database_entry *next;
+} name_database_entry;
+
+
+typedef struct name_database
+{
+  /* List of all known databases.  */
+  name_database_entry *entry;
+  /* List of libraries with service implementation.  */
+  service_library *library;
+} name_database;
+
+
+/* Interface functions for NSS.  */
+
+/* Get the data structure representing the specified database.  More
+   than one function can use the database.  */
+int __nss_database_lookup (const char *database, service_user **ni);
+
+
+/* Put first function with name FCT_NAME for SERVICE in FCTP.  The
+   position is remembered in NI.  The function returns a value < 0 if
+   an error occured or no such function exists.  */
+int __nss_lookup (service_user **ni, const char *fct_name, void **fctp);
+
+/* Determine the next step in the lookup process according to the
+   result STATUS of the call to the last function returned by
+   `__nss_lookup' or `__nss_next'.  NI specifies the last function
+   examined.  The function return a value > 0 if the process should
+   stop with the last result of the last function call to be the
+   result of the entire lookup.  The returned valie is 0 if there is
+   another function to use and < 0 if an error occured.
+
+   If ALL_VALUES is nonzero, the return value will not be > 0 as long as
+   there is a possibility the lookup process can ever use following
+   services.  In other words, only if all four lookup results have
+   the action RETURN associated the lookup process stops before the
+   natural end.  */
+int __nss_next (service_user **ni, const char *fct_name, void **fctp,
+		int status, int all_values);
+
+
+#endif	/* nsswitch.h */
diff --git a/nss/proto-lookup.c b/nss/proto-lookup.c
new file mode 100644
index 0000000000..f27ff591d9
--- /dev/null
+++ b/nss/proto-lookup.c
@@ -0,0 +1,22 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#define DATABASE_NAME protocols
+
+#include "XXX-lookup.c"
diff --git a/nss/pwd-lookup.c b/nss/pwd-lookup.c
new file mode 100644
index 0000000000..e792560bad
--- /dev/null
+++ b/nss/pwd-lookup.c
@@ -0,0 +1,22 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#define DATABASE_NAME passwd
+
+#include "XXX-lookup.c"
diff --git a/nss/rpc-lookup.c b/nss/rpc-lookup.c
new file mode 100644
index 0000000000..f49359ad2b
--- /dev/null
+++ b/nss/rpc-lookup.c
@@ -0,0 +1,22 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#define DATABASE_NAME rpc
+
+#include "XXX-lookup.c"
diff --git a/nss/service-lookup.c b/nss/service-lookup.c
new file mode 100644
index 0000000000..c1a3256add
--- /dev/null
+++ b/nss/service-lookup.c
@@ -0,0 +1,22 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#define DATABASE_NAME services
+
+#include "XXX-lookup.c"