* nss/nss_files/files-network.c: Pass empty for new DB_LOOKUP args.

	(DATABASE): Define this instead of DATAFILE.
	* nss/nss_files/files-hosts.c: Likewise.
	(hostbyname): Use LOOKUP_NAME macro.

	* nss/nss_db/db-XXX.c: New file.
	* nss/Makefile (services): Add db.
	(libnss_db-inhibit-o): New variable.
	(libnss_db-routines): New variable.
	(distribute): Append db-XXX.c.
	(libnss_db.so): Depend on libdb.so and libnss_files.so.
	($(libnss_db-routines:%=$(objpfx)%.c)): New static pattern rule.

	* nss/nss_files/files-XXX.c (DB_LOOKUP): Add KEYSIZE and KEYPATTERN
	args, ignored.
	(DATAFILE): New macro.
	* nss/nss_files/files-parse.c (GENERIC): If undefined, define to
	"files-XXX.c".
	* nss/nss_files/files-rpc.c: Include GENERIC instead of "files-XXX.c".
	Pass db key args to DB_LOOKUP.
	(DATAFILE): Macro removed.
	(DATABASE): New macro replaces it, lacks "/etc/" prefix.
	* nss/nss_files/files-service.c: Likewise.
	* nss/nss_files/files-pwd.c: Likewise.
	* nss/nss_files/files-proto.c: Likewise.
	* nss/nss_files/files-grp.c: Likewise.
	* nss/nss_files/files-ethers.c: Likewise.

	* elf/linux-compat.c: File removed.
	* elf/Makefile (distribute): Remove linux-compat.c.
	(ld-linux.so.1): Remove target and associated variables.

	* sunrpc/xdr.c: Remove malloc decl.
	* sunrpc/portmap.c: Likewise.

	* sunrpc/svc_tcp.c (abort): Don't declare.  Instead define as macro
	casting abort to fn returning bool_t.

	* nss/nss_files/files-parse.c [EXTERN_PARSER]: Do an extern decl of
	the parser function.
	[EXTERN_PARSER] (LINE_PARSER): Define to empty.
	* nss/nss_files/files-pwd.c (EXTERN_PARSER): Define it.
	* nss/nss_files/files-grp.c: Likewise.

	* Makeconfig (BUILD_CC): If undefined, define to $(CC).

	* sunrpc/rpc/types.h: Include stdlib.h instead of declaring malloc.

	* Makeconfig (built-program-cmd): Use $(rtld-installed-name) in place
	of ld.so so lookups for that soname find it.

	* nss/Makefile (libnss_dns.so): Depend on libresolv.so.
	(resobjdir, LDLIBS-nss_dns.so): Variables removed.

12 files changed, 286 insertions, 57 deletions

diff --git a/nss/Makefile b/nss/Makefile
index 8e7a242344..4ab774a809 100644
--- a/nss/Makefile
+++ b/nss/Makefile
@@ -31,7 +31,7 @@ routines		= nsswitch $(addsuffix -lookup,$(databases))
 databases		= proto service hosts network grp pwd rpc ethers
 
 # Specify rules for the nss_* modules.  We have some services.
-services		:= files dns
+services		:= files dns db
 
 extra-libs		= $(services:%=libnss_%)
 
@@ -45,12 +45,26 @@ distribute		+= files-XXX.c files-parse.c
 
 libnss_dns-routines	:= dns-host dns-network
 
+libnss_db-routines	:= $(addprefix db-,$(filter-out hosts network,\
+							$(databases)))
+distribute		+= db-XXX.c
+
 libnss_files-inhibit-o	= $(filter-out .so,$(object-suffixes))
 libnss_dns-inhibit-o	= $(filter-out .so,$(object-suffixes))
+libnss_db-inhibit-o	= $(filter-out .so,$(object-suffixes))
 
 
 include ../Rules
 
 
-resobjdir := $(firstword $(objdir) $(patsubst ../$(subdir),.,$(..)resolv))
-LDLIBS-nss_dns.so = -L$(resobjdir) -Wl,-rpath-link=$(resobjdir) -lresolv
+$(objpfx)libnss_dns.so: $(firstword $(objdir) $(..)resolv)/libresolv.so
+
+$(objpfx)libnss_db.so: $(firstword $(objdir) $(..)db)/libdb.so \
+		       $(objpfx)libnss_files.so
+
+$(libnss_db-routines:%=$(objpfx)%.c): $(objpfx)db-%.c: nss_files/files-%.c
+	@rm -f $@.new
+	(echo '#define EXTERN_PARSER';\
+	 echo '#define GENERIC "../nss_db/db-XXX.c"';\
+	 echo '#include <$<>') > $@.new
+	mv -f $@.new $@
diff --git a/nss/nss_db/db-XXX.c b/nss/nss_db/db-XXX.c
new file mode 100644
index 0000000000..3f6f35d7ec
--- /dev/null
+++ b/nss/nss_db/db-XXX.c
@@ -0,0 +1,203 @@
+/* Common code for DB-based databases in nss_db 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 <db.h>
+#include <fcntl.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).
+   DATABASE -- database file name, ("hosts", "passwd")
+
+   NEED_H_ERRNO - defined iff an arg `int *herrnop' is used.
+*/
+
+#define ENTNAME_r	CONCAT(ENTNAME,_r)
+
+#include <paths.h>
+#define	DBFILE		_PATH_VARDB DATABASE
+
+#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 handle open on the database.  */
+
+static DB *db;
+static int keep_db;
+static unsigned int entidx;	/* Index for `getENTNAME'. */
+
+/* Open database file if not already opened.  */
+static int
+internal_setent (int stayopen)
+{
+  int status = NSS_STATUS_SUCCESS;
+
+  if (db == NULL)
+    {
+      db = dbopen (DBFILE, O_RDONLY, 0, DB_BTREE, NULL);
+
+      if (db == NULL)
+	status = NSS_STATUS_UNAVAIL;
+    }
+
+  /* Remember STAYOPEN flag.  */
+  if (db != NULL)
+    keep_db |= 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);
+
+  /* Reset the sequential index.  */
+  entidx = 0;
+
+  __libc_lock_unlock (lock);
+
+  return status;
+}
+
+
+/* Close the database file.  */
+static void
+internal_endent (void)
+{
+  if (db != NULL)
+    {
+      (*db->close) (db);
+      db = NULL;
+    }
+}
+
+
+/* Thread-safe, exported version of that.  */
+int
+CONCAT(_nss_files_end,ENTNAME) (void)
+{
+  __libc_lock_lock (lock);
+
+  internal_endent ();
+
+  /* Reset STAYOPEN flag.  */
+  keep_db = 0;
+
+  __libc_lock_unlock (lock);
+
+  return NSS_STATUS_SUCCESS;
+}
+
+/* Do a database lookup for KEY.  */
+static enum nss_status
+lookup (const DBT *key, struct STRUCTURE *result,
+	void *buffer, int buflen H_ERRNO_PROTO)
+{
+  enum nss_status status;
+  DBT value;
+
+  /* Open the database.  */
+  internal_setent (keep_db);
+
+  /* Succeed iff it matches a value that parses correctly.  */
+  status = (((*db->get) (db, key, &value, 0) == 0 &&
+	     parse_line (value.data, result, buffer, buflen) == 0)
+	    ? NSS_STATUS_SUCCESS : NSS_STATUS_NOTFOUND);
+
+  if (! keep_db)
+    internal_endent ();
+
+  return status;
+}
+
+
+/* Macro for defining lookup functions for this DB-based database.
+
+   NAME is the name of the lookup; e.g. `pwnam'.
+
+   KEYPATTERN gives `printf' args to construct a key string;
+   e.g. `(".%s", name)'.
+
+   KEYSIZE gives the allocation size of a buffer to construct it in;
+   e.g. `1 + strlen (name)'.
+
+   PROTO describes the arguments for the lookup key;
+   e.g. `const char *name'.
+
+   BREAK_IF_MATCH is ignored, but used by ../nss_files/files-XXX.c.  */
+
+#define DB_LOOKUP(name, keysize, keypattern, break_if_match, proto...)	      \
+enum nss_status								      \
+_nss_files_get##name##_r (proto,					      \
+			  struct STRUCTURE *result,			      \
+			  char *buffer, int buflen H_ERRNO_PROTO)	      \
+{									      \
+  DBT key;								      \
+  enum nss_status status;						      \
+  const size_t size = (keysize);					      \
+  key.data = __alloca (size);						      \
+  key.size = KEYPRINTF keypattern;					      \
+  __libc_lock_lock (lock);						      \
+  status = lookup (&key, result, buffer, buflen H_ERRNO_ARG);		      \
+  __libc_lock_unlock (lock);						      \
+  return status;							      \
+}
+
+#define KEYPRINTF(pattern, args...) snprintf (key.data, size, pattern ,##args)
+
+
+
+
+/* Return the next entry from the database file, doing locking.  */
+enum nss_status
+CONCAT(_nss_files_get,ENTNAME_r) (struct STRUCTURE *result,
+				  char *buffer, int buflen H_ERRNO_PROTO)
+{
+  /* Return next entry in host file.  */
+  enum nss_status status;
+  char buf[20];
+  DBT key;
+
+  __libc_lock_lock (lock);
+  key.size = 1 + snprintf (key.data = buf, sizeof buf, "0%u", entidx++);
+  status = lookup (&key, result, buffer, buflen H_ERRNO_ARG);
+  __libc_lock_unlock (lock);
+
+  return status;
+}
diff --git a/nss/nss_files/files-XXX.c b/nss/nss_files/files-XXX.c
index b9c3579d5b..7fa87c098a 100644
--- a/nss/nss_files/files-XXX.c
+++ b/nss/nss_files/files-XXX.c
@@ -27,13 +27,15 @@ Cambridge, MA 02139, USA.  */
 
    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.
+   DATABASE -- string of the database file's name ("hosts", "passwd").
 
    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)
+#define ENTNAME_r	CONCAT(ENTNAME,_r)
+
+#define DATAFILE	"/etc/" DATABASE
 
 #ifdef NEED_H_ERRNO
 #define H_ERRNO_PROTO	, int *herrnop
@@ -194,13 +196,15 @@ CONCAT(_nss_files_get,ENTNAME_r) (struct STRUCTURE *result,
 
    NAME is the name of the lookup; e.g. `hostbyname'.
 
+   KEYSIZE and KEYPATTERN are ignored here but used by ../nss_db/db-XXX.c.
+
    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...)			      \
+#define DB_LOOKUP(name, keysize, keypattern, break_if_match, proto...)	      \
 enum nss_status								      \
 _nss_files_get##name##_r (proto,					      \
 			  struct STRUCTURE *result,			      \
diff --git a/nss/nss_files/files-ethers.c b/nss/nss_files/files-ethers.c
index b66a3c3d04..70f7d07dbd 100644
--- a/nss/nss_files/files-ethers.c
+++ b/nss/nss_files/files-ethers.c
@@ -30,7 +30,7 @@ struct etherent
 struct etherent_data {};
 
 #define ENTNAME		etherent
-#define DATAFILE	"/etc/ethers"
+#define DATABASE	"ethers"
 #include "files-parse.c"
 LINE_PARSER
 ("#",
@@ -56,15 +56,16 @@ LINE_PARSER
  )
 
 
-#include "files-XXX.c"
+#include GENERIC
 
-DB_LOOKUP (hostton,
+DB_LOOKUP (hostton, 1 + strlen (name), (".%s", name),
 	   {
 	     if (strcmp (result->e_name, name) == 0)
 	       break;
 	   }, const char *name)
 
-DB_LOOKUP (ntohost,
+DB_LOOKUP (ntohost, 7, ("=%c%c%c%c%c%c",
+			addr[0], addr[1], addr[2], addr[3], addr[4], addr[5]),
 	   {
 	     if (memcmp (&result->e_addr, addr,
 			 sizeof (struct ether_addr)) == 0)
diff --git a/nss/nss_files/files-grp.c b/nss/nss_files/files-grp.c
index 580dfbe3eb..8e047b6475 100644
--- a/nss/nss_files/files-grp.c
+++ b/nss/nss_files/files-grp.c
@@ -21,26 +21,22 @@ Cambridge, MA 02139, USA.  */
 
 #define STRUCTURE	group
 #define ENTNAME		grent
-#define DATAFILE	"/etc/group"
+#define DATABASE	"group"
 struct grent_data {};
 
-#define TRAILING_LIST_MEMBER		gr_mem
-#define TRAILING_LIST_SEPARATOR_P(c)	((c) == ',')
-#include "files-parse.c"
 /* Our parser function is already defined in fgetgrent.c, so use that.
    to parse lines from the database file.  */
-extern int parse_line (char *line, struct STRUCTURE *result,
-		       void *buffer, int buflen);
-
-#include "files-XXX.c"
+#define EXTERN_PARSER
+#include "files-parse.c"
+#include GENERIC
 
-DB_LOOKUP (grnam,
+DB_LOOKUP (grnam, 1 + strlen (name), (".%s", name),
 	   {
 	     if (! strcmp (name, result->gr_name))
 	       break;
 	   }, const char *name)
 
-DB_LOOKUP (grgid,
+DB_LOOKUP (grgid, 20, ("=%lu", (unsigned long int) gid),
 	   {
 	     if (result->gr_gid == gid)
 	       break;
diff --git a/nss/nss_files/files-hosts.c b/nss/nss_files/files-hosts.c
index 19a0075ecf..bc9eaa39a5 100644
--- a/nss/nss_files/files-hosts.c
+++ b/nss/nss_files/files-hosts.c
@@ -30,7 +30,7 @@ Cambridge, MA 02139, USA.  */
 
 
 #define ENTNAME		hostent
-#define DATAFILE	_PATH_HOSTS
+#define DATABASE	"hosts"
 
 #define ENTDATA hostent_data
 struct hostent_data
@@ -93,19 +93,11 @@ LINE_PARSER
 
 #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 (hostbyname, ,,
+	   LOOKUP_NAME (h_name, h_aliases),
+	   const char *name)
 
-DB_LOOKUP (hostbyaddr,
+DB_LOOKUP (hostbyaddr, ,,
 	   {
 	     if (result->h_addrtype == type && result->h_length == len &&
 		 ! memcmp (addr, result->h_addr_list[0], len))
diff --git a/nss/nss_files/files-network.c b/nss/nss_files/files-network.c
index c6cd718dd2..acfbc3198c 100644
--- a/nss/nss_files/files-network.c
+++ b/nss/nss_files/files-network.c
@@ -22,7 +22,7 @@ Cambridge, MA 02139, USA.  */
 #include <netdb.h>
 
 #define ENTNAME		netent
-#define DATAFILE	_PATH_NETWORKS
+#define DATABASE	"networks"
 
 struct netent_data {};
 
@@ -43,11 +43,11 @@ LINE_PARSER
 
 #include "files-XXX.c"
 
-DB_LOOKUP (netbyname,
+DB_LOOKUP (netbyname, ,,
 	   LOOKUP_NAME (n_name, n_aliases),
 	   const char *name)
 
-DB_LOOKUP (netbyaddr,
+DB_LOOKUP (netbyaddr, ,,
 	   {
 	     if (result->n_addrtype == type && result->n_net == net)
 	       /* Bingo!  */
diff --git a/nss/nss_files/files-parse.c b/nss/nss_files/files-parse.c
index a9c461ef46..8930780f1f 100644
--- a/nss/nss_files/files-parse.c
+++ b/nss/nss_files/files-parse.c
@@ -52,6 +52,19 @@ struct parser_data
 #define parse_line CONCAT(_nss_files_parse_,ENTNAME)
 #endif
 
+
+#ifdef EXTERN_PARSER
+
+/* The parser is defined in a different module.  */
+extern int parse_line (char *line, struct STRUCTURE *result,
+		       struct parser_data *data, int datalen);
+
+#define LINE_PARSER(EOLSET, BODY) /* Do nothing */
+
+#else
+
+/* Define a line parsing function.  */
+
 #define LINE_PARSER(EOLSET, BODY)					      \
 parser_stclass int							      \
 parse_line (char *line, struct STRUCTURE *result,			      \
@@ -167,6 +180,9 @@ parse_list (char *line, struct parser_data *data, int datalen)
   return list;
 }
 
+#endif	/* EXTERN_PARSER */
+
+
 #define LOOKUP_NAME(nameelt, aliaselt)					      \
 {									      \
   char **ap;								      \
@@ -180,3 +196,8 @@ parse_list (char *line, struct parser_data *data, int datalen)
 }
 
 #endif
+
+/* This is defined by db-*.c to include "../nss_db/db-XXX.c" instead.  */
+#ifndef GENERIC
+#define GENERIC "files-XXX.c"
+#endif
diff --git a/nss/nss_files/files-proto.c b/nss/nss_files/files-proto.c
index ef5a7c2560..3cc14e7859 100644
--- a/nss/nss_files/files-proto.c
+++ b/nss/nss_files/files-proto.c
@@ -21,7 +21,7 @@ Cambridge, MA 02139, USA.  */
 
 
 #define ENTNAME		protoent
-#define DATAFILE	_PATH_PROTOCOLS
+#define DATABASE	"protocols"
 
 struct protoent_data {};
 
@@ -34,13 +34,13 @@ LINE_PARSER
  INT_FIELD (result->p_proto, isspace, 1, 10,);
  )
 
-#include "files-XXX.c"
+#include GENERIC
 
-DB_LOOKUP (protobyname,
+DB_LOOKUP (protobyname, 1 + strlen (name), (".%s", name),
 	   LOOKUP_NAME (p_name, p_aliases),
 	   const char *name)
 
-DB_LOOKUP (protobynumber,
+DB_LOOKUP (protobynumber, 20, ("=%d", proto),
 	   {
 	     if (result->p_proto == proto)
 	       break;
diff --git a/nss/nss_files/files-pwd.c b/nss/nss_files/files-pwd.c
index 6b39116a44..9732bc6f23 100644
--- a/nss/nss_files/files-pwd.c
+++ b/nss/nss_files/files-pwd.c
@@ -21,24 +21,22 @@ Cambridge, MA 02139, USA.  */
 
 #define STRUCTURE	passwd
 #define ENTNAME		pwent
-#define DATAFILE	"/etc/passwd"
+#define DATABASE	"passwd"
 struct pwent_data {};
 
-#include "files-parse.c"
-/* Our parser function is already defined in fgetpwent.c, so use that.
+/* Our parser function is already defined in fgetpwent.c, so use that
    to parse lines from the database file.  */
-extern int parse_line (char *line, struct STRUCTURE *result,
-		       void *buffer, int buflen);
-
-#include "files-XXX.c"
+#define EXTERN_PARSER
+#include "files-parse.c"
+#include GENERIC
 
-DB_LOOKUP (pwnam,
+DB_LOOKUP (pwnam, 1 + strlen (name), (".%s", name),
 	   {
 	     if (! strcmp (name, result->pw_name))
 	       break;
 	   }, const char *name)
 
-DB_LOOKUP (pwuid,
+DB_LOOKUP (pwuid, 20, ("=%lu", (unsigned long int) uid),
 	   {
 	     if (result->pw_uid == uid)
 	       break;
diff --git a/nss/nss_files/files-rpc.c b/nss/nss_files/files-rpc.c
index f8bef451fa..0ad1e21848 100644
--- a/nss/nss_files/files-rpc.c
+++ b/nss/nss_files/files-rpc.c
@@ -21,7 +21,7 @@ Cambridge, MA 02139, USA.  */
 
 
 #define ENTNAME		rpcent
-#define DATAFILE	"/etc/rpc"
+#define DATABASE	"rpc"
 
 struct rpcent_data {};
 
@@ -34,13 +34,13 @@ LINE_PARSER
  INT_FIELD (result->r_number, isspace, 1, 10,);
  )
 
-#include "files-XXX.c"
+#include GENERIC
 
-DB_LOOKUP (rpcbyname,
+DB_LOOKUP (rpcbyname, 1 + strlen (name), (".%s", name),
 	   LOOKUP_NAME (r_name, r_aliases),
 	   const char *name)
 
-DB_LOOKUP (rpcbynumber,
+DB_LOOKUP (rpcbynumber, 20, ("=%d", number),
 	   {
 	     if (result->r_number == number)
 	       break;
diff --git a/nss/nss_files/files-service.c b/nss/nss_files/files-service.c
index f0dba50fe6..5dea476208 100644
--- a/nss/nss_files/files-service.c
+++ b/nss/nss_files/files-service.c
@@ -22,7 +22,7 @@ Cambridge, MA 02139, USA.  */
 
 
 #define ENTNAME		servent
-#define DATAFILE	_PATH_SERVICES
+#define DATABASE	"services"
 
 struct servent_data {};
 
@@ -37,13 +37,13 @@ LINE_PARSER
  STRING_FIELD (result->s_proto, isspace, 1);
  )
 
-#include "files-XXX.c"
+#include GENERIC
 
-DB_LOOKUP (servbyname,
+DB_LOOKUP (servbyname, 1 + strlen (name), (".%s", name),
 	   LOOKUP_NAME (s_name, s_aliases),
 	   const char *name)
 
-DB_LOOKUP (servbyport,
+DB_LOOKUP (servbyport, 20, ("=%d", port),
 	   {
 	     if (result->s_port == port)
 	       break;