* nis/nss_nis/nis-service.c (_nss_nis_getservbyname_r): Correct

	computation of keylen.

18 files changed, 999 insertions, 137 deletions

diff --git a/nscd/Makefile b/nscd/Makefile
index 21657abeb7..ef3ce184f9 100644
--- a/nscd/Makefile
+++ b/nscd/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 1998,2000,2002,2003,2004,2005,2006
+# Copyright (C) 1998,2000,2002,2003,2004,2005,2006,2007
 #	Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
@@ -22,7 +22,8 @@
 #
 subdir	:= nscd
 
-routines := nscd_getpw_r nscd_getgr_r nscd_gethst_r nscd_getai nscd_initgroups
+routines := nscd_getpw_r nscd_getgr_r nscd_gethst_r nscd_getai \
+	    nscd_initgroups nscd_getserv_r
 aux	:= nscd_helper
 
 include ../Makeconfig
@@ -32,6 +33,7 @@ vpath %.c ../locale/programs
 
 nscd-modules := nscd connections pwdcache getpwnam_r getpwuid_r grpcache \
 		getgrnam_r getgrgid_r hstcache gethstbyad_r gethstbynm2_r \
+		getsrvbynm_r getsrvbypt_r servicescache \
 		dbg_log nscd_conf nscd_stat cache mem nscd_setup_thread \
 		xmalloc xstrdup aicache initgrcache gai
 
@@ -117,6 +119,9 @@ CFLAGS-aicache.c += $(nscd-cflags)
 CFLAGS-selinux.c += $(nscd-cflags)
 CFLAGS-initgrcache.c += $(nscd-cflags)
 CFLAGS-gai.c += $(nscd-cflags)
+CFLAGS-servicescache.c += $(nscd-cflags)
+CFLAGS-getsrvbynm_r.c += $(nscd-cflags)
+CFLAGS-getsrvbypt_r.c += $(nscd-cflags)
 
 ifeq (yesyes,$(have-fpie)$(build-shared))
 relro-LDFLAGS += -Wl,-z,now
diff --git a/nscd/cache.c b/nscd/cache.c
index ef986f374a..e63a4f87df 100644
--- a/nscd/cache.c
+++ b/nscd/cache.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 1998, 1999, 2003-2005, 2006 Free Software Foundation, Inc.
+/* Copyright (c) 1998, 1999, 2003-2006, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
 
@@ -40,6 +40,25 @@
 unsigned int reload_count = DEFAULT_RELOAD_LIMIT;
 
 
+static void (*const readdfcts[LASTREQ]) (struct database_dyn *,
+					 struct hashentry *,
+					 struct datahead *) =
+{
+  [GETPWBYNAME] = readdpwbyname,
+  [GETPWBYUID] = readdpwbyuid,
+  [GETGRBYNAME] = readdgrbyname,
+  [GETGRBYGID] = readdgrbygid,
+  [GETHOSTBYNAME] = readdhstbyname,
+  [GETHOSTBYNAMEv6] = readdhstbynamev6,
+  [GETHOSTBYADDR] = readdhstbyaddr,
+  [GETHOSTBYADDRv6] = readdhstbyaddrv6,
+  [GETAI] = readdhstai,
+  [INITGROUPS] = readdinitgroups,
+  [GETSERVBYNAME] = readdservbyname,
+  [GETSERVBYPORT] = readdservbyport
+};
+
+
 /* Search the cache for a matching entry and return it when found.  If
    this fails search the negative cache and return (void *) -1 if this
    search was successful.  Otherwise return NULL.
@@ -328,51 +347,10 @@ prune_cache (struct database_dyn *table, time_t now, int fd)
 		      /* Reload the value.  We do this only for the
 			 initially used key, not the additionally
 			 added derived value.  */
-		      switch (runp->type)
-			{
-			case GETPWBYNAME:
-			  readdpwbyname (table, runp, dh);
-			  break;
-
-			case GETPWBYUID:
-			  readdpwbyuid (table, runp, dh);
-			  break;
-
-			case GETGRBYNAME:
-			  readdgrbyname (table, runp, dh);
-			  break;
-
-			case GETGRBYGID:
-			  readdgrbygid (table, runp, dh);
-			  break;
-
-			case GETHOSTBYNAME:
-			  readdhstbyname (table, runp, dh);
-			  break;
-
-			case GETHOSTBYNAMEv6:
-			  readdhstbynamev6 (table, runp, dh);
-			  break;
-
-			case GETHOSTBYADDR:
-			  readdhstbyaddr (table, runp, dh);
-			  break;
-
-			case GETHOSTBYADDRv6:
-			  readdhstbyaddrv6 (table, runp, dh);
-			  break;
-
-			case GETAI:
-			  readdhstai (table, runp, dh);
-			  break;
-
-			case INITGROUPS:
-			  readdinitgroups (table, runp, dh);
-			  break;
-
-			default:
-			  assert (! "should never happen");
-			}
+		      assert (runp->type < LASTREQ
+			      && readdfcts[runp->type] != NULL);
+
+		      readdfcts[runp->type] (table, runp, dh);
 
 		      /* If the entry has been replaced, we might need
 			 cleanup.  */
diff --git a/nscd/connections.c b/nscd/connections.c
index f012b69ed8..a5e758e071 100644
--- a/nscd/connections.c
+++ b/nscd/connections.c
@@ -75,7 +75,7 @@ static void begin_drop_privileges (void);
 static void finish_drop_privileges (void);
 
 /* Map request type to a string.  */
-const char *serv2str[LASTREQ] =
+const char *const serv2str[LASTREQ] =
 {
   [GETPWBYNAME] = "GETPWBYNAME",
   [GETPWBYUID] = "GETPWBYUID",
@@ -92,7 +92,10 @@ const char *serv2str[LASTREQ] =
   [GETFDGR] = "GETFDGR",
   [GETFDHST] = "GETFDHST",
   [GETAI] = "GETAI",
-  [INITGROUPS] = "INITGROUPS"
+  [INITGROUPS] = "INITGROUPS",
+  [GETSERVBYNAME] = "GETSERVBYNAME",
+  [GETSERVBYPORT] = "GETSERVBYPORT",
+  [GETFDSERV] = "GETFDSERV"
 };
 
 /* The control data structures for the services.  */
@@ -107,6 +110,7 @@ struct database_dyn dbs[lastdb] =
     .propagate = 1,
     .shared = 0,
     .max_db_size = DEFAULT_MAX_DB_SIZE,
+    .reset_res = 0,
     .filename = "/etc/passwd",
     .db_filename = _PATH_NSCD_PASSWD_DB,
     .disabled_iov = &pwd_iov_disabled,
@@ -125,6 +129,7 @@ struct database_dyn dbs[lastdb] =
     .propagate = 1,
     .shared = 0,
     .max_db_size = DEFAULT_MAX_DB_SIZE,
+    .reset_res = 0,
     .filename = "/etc/group",
     .db_filename = _PATH_NSCD_GROUP_DB,
     .disabled_iov = &grp_iov_disabled,
@@ -143,6 +148,7 @@ struct database_dyn dbs[lastdb] =
     .propagate = 0,		/* Not used.  */
     .shared = 0,
     .max_db_size = DEFAULT_MAX_DB_SIZE,
+    .reset_res = 1,
     .filename = "/etc/hosts",
     .db_filename = _PATH_NSCD_HOSTS_DB,
     .disabled_iov = &hst_iov_disabled,
@@ -151,6 +157,25 @@ struct database_dyn dbs[lastdb] =
     .wr_fd = -1,
     .ro_fd = -1,
     .mmap_used = false
+  },
+  [servdb] = {
+    .lock = PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP,
+    .prunelock = PTHREAD_MUTEX_INITIALIZER,
+    .enabled = 0,
+    .check_file = 1,
+    .persistent = 0,
+    .propagate = 0,		/* Not used.  */
+    .shared = 0,
+    .max_db_size = DEFAULT_MAX_DB_SIZE,
+    .reset_res = 0,
+    .filename = "/etc/services",
+    .db_filename = _PATH_NSCD_SERVICES_DB,
+    .disabled_iov = &serv_iov_disabled,
+    .postimeout = 28800,
+    .negtimeout = 20,
+    .wr_fd = -1,
+    .ro_fd = -1,
+    .mmap_used = false
   }
 };
 
@@ -170,7 +195,10 @@ static struct database_dyn *const serv2db[LASTREQ] =
   [GETFDGR] = &dbs[grpdb],
   [GETFDHST] = &dbs[hstdb],
   [GETAI] = &dbs[hstdb],
-  [INITGROUPS] = &dbs[grpdb]
+  [INITGROUPS] = &dbs[grpdb],
+  [GETSERVBYNAME] = &dbs[servdb],
+  [GETSERVBYPORT] = &dbs[servdb],
+  [GETFDSERV] = &dbs[servdb]
 };
 
 
@@ -305,7 +333,7 @@ check_use (const char *data, nscd_ssize_t first_free, uint8_t *usemap,
 static int
 verify_persistent_db (void *mem, struct database_pers_head *readhead, int dbnr)
 {
-  assert (dbnr == pwddb || dbnr == grpdb || dbnr == hstdb);
+  assert (dbnr == pwddb || dbnr == grpdb || dbnr == hstdb || dbnr == servdb);
 
   time_t now = time (NULL);
 
@@ -821,18 +849,16 @@ invalidate_cache (char *key, int fd)
   dbtype number;
   int32_t resp;
 
-  if (strcmp (key, "passwd") == 0)
-    number = pwddb;
-  else if (strcmp (key, "group") == 0)
-    number = grpdb;
-  else if (__builtin_expect (strcmp (key, "hosts"), 0) == 0)
-    {
-      number = hstdb;
+  for (number = pwddb; number < lastdb; ++number)
+    if (strcmp (key, dbnames[number]) == 0)
+      {
+	if (dbs[number].reset_res)
+	  res_init ();
 
-      /* Re-initialize the resolver.  resolv.conf might have changed.  */
-      res_init ();
-    }
-  else
+	break;
+      }
+
+  if (number == lastdb)
     {
       resp = EINVAL;
       writeall (fd, &resp, sizeof (resp));
@@ -922,8 +948,9 @@ cannot handle old request version %d; current version is %d"),
   // XXX Clean up so that each new command need not introduce a
   // XXX new conditional.
   if ((__builtin_expect (req->type, GETPWBYNAME) >= GETPWBYNAME
-       && __builtin_expect (req->type, LASTDBREQ) <= LASTDBREQ)
-      || req->type == GETAI || req->type == INITGROUPS)
+       && __builtin_expect (req->type, GETHOSTBYADDRv6) <= GETHOSTBYADDRv6)
+      || req->type == GETAI || req->type == INITGROUPS
+      || req->type == GETSERVBYNAME || req->type == GETSERVBYPORT)
     {
       if (__builtin_expect (debug_level, 0) > 0)
 	{
@@ -1067,6 +1094,14 @@ cannot handle old request version %d; current version is %d"),
       addinitgroups (db, fd, req, key, uid);
       break;
 
+    case GETSERVBYNAME:
+      addservbyname (db, fd, req, key, uid);
+      break;
+
+    case GETSERVBYPORT:
+      addservbyport (db, fd, req, key, uid);
+      break;
+
     case GETSTAT:
     case SHUTDOWN:
     case INVALIDATE:
@@ -1112,6 +1147,7 @@ cannot handle old request version %d; current version is %d"),
     case GETFDPW:
     case GETFDGR:
     case GETFDHST:
+    case GETFDSERV:
 #ifdef SCM_RIGHTS
       send_ro_fd (serv2db[req->type], key, fd);
 #endif
@@ -1153,7 +1189,7 @@ cannot open /proc/self/cmdline: %s; disabling paranoia mode"),
       if (n == -1)
 	{
 	  dbg_log (_("\
-cannot open /proc/self/cmdline: %s; disabling paranoia mode"),
+cannot read /proc/self/cmdline: %s; disabling paranoia mode"),
 		   strerror (errno));
 
 	  close (fd);
diff --git a/nscd/gai.c b/nscd/gai.c
index 2e706bdfe7..46f8b8bec9 100644
--- a/nscd/gai.c
+++ b/nscd/gai.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
+/* Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 2004.
 
@@ -17,7 +17,6 @@
 
 /* This file uses the getaddrinfo code but it compiles it without NSCD
    support.  We just need a few symbol renames.  */
-#define __getservbyname_r getservbyname_r
 #define __inet_aton inet_aton
 #define __getsockname getsockname
 #define __socket socket
diff --git a/nscd/getsrvbynm_r.c b/nscd/getsrvbynm_r.c
new file mode 100644
index 0000000000..fb60f4802d
--- /dev/null
+++ b/nscd/getsrvbynm_r.c
@@ -0,0 +1,27 @@
+/* Copyright (C) 1996, 1997, 2002, 2007 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include <netdb.h>
+
+
+#define LOOKUP_TYPE		struct servent
+#define FUNCTION_NAME		getservbyname
+#define DATABASE_NAME		services
+#define ADD_PARAMS		const char *name, const char *proto
+#define ADD_VARIABLES		name, proto
+
+#include "../nss/getXXbyYY_r.c"
diff --git a/nscd/getsrvbypt_r.c b/nscd/getsrvbypt_r.c
new file mode 100644
index 0000000000..fd5b11bc3d
--- /dev/null
+++ b/nscd/getsrvbypt_r.c
@@ -0,0 +1,27 @@
+/* Copyright (C) 1996, 1997, 2002, 2007 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include <netdb.h>
+
+
+#define LOOKUP_TYPE		struct servent
+#define FUNCTION_NAME		getservbyport
+#define DATABASE_NAME		services
+#define ADD_PARAMS		int port, const char *proto
+#define ADD_VARIABLES		port, proto
+
+#include "../nss/getXXbyYY_r.c"
diff --git a/nscd/grpcache.c b/nscd/grpcache.c
index 5a8fba4759..54d1ef1eef 100644
--- a/nscd/grpcache.c
+++ b/nscd/grpcache.c
@@ -1,5 +1,5 @@
 /* Cache handling for group lookup.
-   Copyright (C) 1998-2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 1998-2005, 2006, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
 
@@ -445,23 +445,14 @@ addgrbyX (struct database_dyn *db, int fd, request_header *req,
 	dbg_log (_("Reloading \"%s\" in group cache!"), keystr);
     }
 
-#if 0
-  uid_t oldeuid = 0;
-  if (db->secure)
-    {
-      oldeuid = geteuid ();
-      pthread_seteuid_np (uid);
-    }
-#endif
-
   while (lookup (req->type, key, &resultbuf, buffer, buflen, &grp) != 0
 	 && (errval = errno) == ERANGE)
     {
-      char *old_buffer = buffer;
       errno = 0;
 
       if (__builtin_expect (buflen > 32768, 0))
 	{
+	  char *old_buffer = buffer;
 	  buflen *= 2;
 	  buffer = (char *) realloc (use_malloc ? buffer : NULL, buflen);
 	  if (buffer == NULL)
@@ -486,11 +477,6 @@ addgrbyX (struct database_dyn *db, int fd, request_header *req,
 	buffer = (char *) extend_alloca (buffer, buflen, 2 * buflen);
     }
 
-#if 0
-  if (db->secure)
-    pthread_seteuid_np (oldeuid);
-#endif
-
   cache_addgr (db, fd, req, keystr, grp, uid, he, dh, errval);
 
   if (use_malloc)
diff --git a/nscd/hstcache.c b/nscd/hstcache.c
index e27ece5bc6..742491aea3 100644
--- a/nscd/hstcache.c
+++ b/nscd/hstcache.c
@@ -1,5 +1,5 @@
 /* Cache handling for host lookup.
-   Copyright (C) 1998-2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 1998-2005, 2006, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
 
@@ -463,24 +463,15 @@ addhstbyX (struct database_dyn *db, int fd, request_header *req,
 	dbg_log (_("Reloading \"%s\" in hosts cache!"), (char *) str);
     }
 
-#if 0
-  uid_t oldeuid = 0;
-  if (db->secure)
-    {
-      oldeuid = geteuid ();
-      pthread_seteuid_np (uid);
-    }
-#endif
-
   while (lookup (req->type, key, &resultbuf, buffer, buflen, &hst) != 0
 	 && h_errno == NETDB_INTERNAL
 	 && (errval = errno) == ERANGE)
     {
-      char *old_buffer = buffer;
       errno = 0;
 
       if (__builtin_expect (buflen > 32768, 0))
 	{
+	  char *old_buffer = buffer;
 	  buflen *= 2;
 	  buffer = (char *) realloc (use_malloc ? buffer : NULL, buflen);
 	  if (buffer == NULL)
@@ -505,11 +496,6 @@ addhstbyX (struct database_dyn *db, int fd, request_header *req,
 	buffer = (char *) extend_alloca (buffer, buflen, 2 * buflen);
     }
 
-#if 0
-  if (db->secure)
-    pthread_seteuid_np (oldeuid);
-#endif
-
   cache_addhst (db, fd, req, key, hst, uid, he, dh,
 		h_errno == TRY_AGAIN ? errval : 0);
 
diff --git a/nscd/nscd-client.h b/nscd/nscd-client.h
index 0fd2d9f547..7702f590bd 100644
--- a/nscd/nscd-client.h
+++ b/nscd/nscd-client.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 1998, 1999, 2000, 2003, 2004, 2005, 2006
+/* Copyright (c) 1998, 1999, 2000, 2003, 2004, 2005, 2006, 2007
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
@@ -56,7 +56,6 @@ typedef enum
   GETHOSTBYNAMEv6,
   GETHOSTBYADDR,
   GETHOSTBYADDRv6,
-  LASTDBREQ = GETHOSTBYADDRv6,
   SHUTDOWN,		/* Shut the server down.  */
   GETSTAT,		/* Get the server statistic.  */
   INVALIDATE,           /* Invalidate one special cache.  */
@@ -65,6 +64,9 @@ typedef enum
   GETFDHST,
   GETAI,
   INITGROUPS,
+  GETSERVBYNAME,
+  GETSERVBYPORT,
+  GETFDSERV,
   LASTREQ
 } request_type;
 
@@ -153,6 +155,19 @@ typedef struct
 } initgr_response_header;
 
 
+/* Structure sent in reply to services query.  Note that this struct is
+   sent also if the service is disabled or there is no record found.  */
+typedef struct
+{
+  int32_t version;
+  int32_t found;
+  nscd_ssize_t s_name_len;
+  nscd_ssize_t s_proto_len;
+  nscd_ssize_t s_aliases_cnt;
+  int32_t s_port;
+} serv_response_header;
+
+
 /* Type for offsets in data part of database.  */
 typedef uint32_t ref_t;
 /* Value for invalid/no reference.  */
@@ -186,6 +201,7 @@ struct datahead
     hst_response_header hstdata;
     ai_response_header aidata;
     initgr_response_header initgrdata;
+    serv_response_header servdata;
     nscd_ssize_t align1;
     nscd_time_t align2;
   } data[0];
diff --git a/nscd/nscd.c b/nscd/nscd.c
index b68ae2f413..d0c34eb010 100644
--- a/nscd/nscd.c
+++ b/nscd/nscd.c
@@ -332,15 +332,15 @@ parse_opt (int key, char *arg, struct argp_state *state)
 	    exit (EXIT_FAILURE);
 
 	  request_header req;
-	  if (strcmp (arg, "passwd") == 0)
-	    req.key_len = sizeof "passwd";
-	  else if (strcmp (arg, "group") == 0)
-	    req.key_len = sizeof "group";
-	  else if (strcmp (arg, "hosts") == 0)
-	    req.key_len = sizeof "hosts";
-	  else
+	  dbtype cnt;
+	  for (cnt = pwddb; cnt < lastdb; ++cnt)
+	    if (strcmp (arg, dbnames[cnt]) == 0)
+	      break;
+
+	  if (cnt == lastdb)
 	    return ARGP_ERR_UNKNOWN;
 
+	  req.key_len = strlen (arg) + 1;
 	  req.version = NSCD_VERSION;
 	  req.type = INVALIDATE;
 
diff --git a/nscd/nscd.conf b/nscd/nscd.conf
index 43969898f9..d0d16ad963 100644
--- a/nscd/nscd.conf
+++ b/nscd/nscd.conf
@@ -26,7 +26,7 @@
 #	max-db-size		<service> <number bytes>
 #	auto-propagate		<service> <yes|no>
 #
-# Currently supported cache names (services): passwd, group, hosts
+# Currently supported cache names (services): passwd, group, hosts, services
 #
 
 
@@ -68,3 +68,12 @@
 	persistent		hosts		yes
 	shared			hosts		yes
 	max-db-size		hosts		33554432
+
+	enable-cache		services	yes
+	positive-time-to-live	services	28800
+	negative-time-to-live	services	20
+	suggested-size		services	211
+	check-files		services	yes
+	persistent		services	yes
+	shared			services	yes
+	max-db-size		services	33554432
diff --git a/nscd/nscd.h b/nscd/nscd.h
index 5c2ff3a95b..e8199b8009 100644
--- a/nscd/nscd.h
+++ b/nscd/nscd.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006
+/* Copyright (c) 1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
@@ -38,6 +38,7 @@ typedef enum
   pwddb,
   grpdb,
   hstdb,
+  servdb,
   lastdb
 } dbtype;
 
@@ -65,7 +66,8 @@ struct database_dyn
   int persistent;
   int shared;
   int propagate;
-  const char filename[12];
+  int reset_res;
+  const char filename[16];
   const char *db_filename;
   time_t file_mtime;
   size_t suggested_module;
@@ -92,6 +94,7 @@ struct database_dyn
 #define _PATH_NSCD_PASSWD_DB	"/var/db/nscd/passwd"
 #define _PATH_NSCD_GROUP_DB	"/var/db/nscd/group"
 #define _PATH_NSCD_HOSTS_DB	"/var/db/nscd/hosts"
+#define _PATH_NSCD_SERVICES_DB	"/var/db/nscd/services"
 
 /* Path used when not using persistent storage.  */
 #define _PATH_NSCD_XYZ_DB_TMP	"/var/run/nscd/dbXXXXXX"
@@ -110,12 +113,13 @@ struct database_dyn
 
 /* Global variables.  */
 extern struct database_dyn dbs[lastdb];
-extern const char *dbnames[lastdb];
-extern const char *serv2str[LASTREQ];
+extern const char *const dbnames[lastdb];
+extern const char *const serv2str[LASTREQ];
 
 extern const struct iovec pwd_iov_disabled;
 extern const struct iovec grp_iov_disabled;
 extern const struct iovec hst_iov_disabled;
+extern const struct iovec serv_iov_disabled;
 
 
 /* Initial number of threads to run.  */
@@ -238,6 +242,16 @@ extern void addinitgroups (struct database_dyn *db, int fd,
 extern void readdinitgroups (struct database_dyn *db, struct hashentry *he,
 			     struct datahead *dh);
 
+/* servicecache.c */
+extern void addservbyname (struct database_dyn *db, int fd,
+			   request_header *req, void *key, uid_t uid);
+extern void readdservbyname (struct database_dyn *db, struct hashentry *he,
+			     struct datahead *dh);
+extern void addservbyport (struct database_dyn *db, int fd,
+			   request_header *req, void *key, uid_t uid);
+extern void readdservbyport (struct database_dyn *db, struct hashentry *he,
+			     struct datahead *dh);
+
 /* mem.c */
 extern void *mempool_alloc (struct database_dyn *db, size_t len);
 extern void gc (struct database_dyn *db);
diff --git a/nscd/nscd_conf.c b/nscd/nscd_conf.c
index 2048eca886..e724c6bd59 100644
--- a/nscd/nscd_conf.c
+++ b/nscd/nscd_conf.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 1998,2000,2003,2004,2005,2006 Free Software Foundation, Inc.
+/* Copyright (c) 1998, 2000, 2003-2006, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
 
@@ -37,11 +37,12 @@ extern char *xstrdup (const char *s);
 
 
 /* Names of the databases.  */
-const char *dbnames[lastdb] =
+const char *const dbnames[lastdb] =
 {
   [pwddb] = "passwd",
   [grpdb] = "group",
-  [hstdb] = "hosts"
+  [hstdb] = "hosts",
+  [servdb] = "services"
 };
 
 
@@ -52,7 +53,7 @@ find_db (const char *name)
     if (strcmp (name, dbnames[cnt]) == 0)
       return cnt;
 
-  error (0, 0, _("database %s is not supported\n"), name);
+  error (0, 0, _("database %s is not supported"), name);
   return -1;
 }
 
diff --git a/nscd/nscd_getserv_r.c b/nscd/nscd_getserv_r.c
new file mode 100644
index 0000000000..ea5dcedb88
--- /dev/null
+++ b/nscd/nscd_getserv_r.c
@@ -0,0 +1,306 @@
+/* Copyright (C) 2007 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2007.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <string.h>
+#include <not-cancel.h>
+#include <stdio-common/_itoa.h>
+
+#include "nscd-client.h"
+#include "nscd_proto.h"
+
+
+int __nss_not_use_nscd_services;
+
+
+static int nscd_getserv_r (const char *crit, size_t critlen, const char *proto,
+			   request_type type, struct servent *resultbuf,
+			   char *buf, size_t buflen, struct servent **result);
+
+
+int
+__nscd_getservbyname_r (const char *name, const char *proto,
+			struct servent *result_buf, char *buf, size_t buflen,
+			struct servent **result)
+{
+  return nscd_getserv_r (name, strlen (name), proto, GETSERVBYNAME, result_buf,
+			 buf, buflen, result);
+}
+
+
+int
+__nscd_getservbyport_r (int port, const char *proto,
+			struct servent *result_buf, char *buf, size_t buflen,
+			struct servent **result)
+{
+  char portstr[3 * sizeof (int) + 2];
+  portstr[sizeof (portstr) - 1] = '\0';
+  char *cp = _itoa_word (port, portstr + sizeof (portstr) - 1, 10, 0);
+
+  return nscd_getserv_r (portstr, portstr + sizeof (portstr) - cp, proto,
+			 GETSERVBYPORT, result_buf, buf, buflen, result);
+}
+
+
+libc_locked_map_ptr (, __serv_map_handle) attribute_hidden;
+/* Note that we only free the structure if necessary.  The memory
+   mapping is not removed since it is not visible to the malloc
+   handling.  */
+libc_freeres_fn (serv_map_free)
+{
+  if (__serv_map_handle.mapped != NO_MAPPING)
+    {
+      void *p = __serv_map_handle.mapped;
+      __serv_map_handle.mapped = NO_MAPPING;
+      free (p);
+    }
+}
+
+
+static int
+nscd_getserv_r (const char *crit, size_t critlen, const char *proto,
+		request_type type, struct servent *resultbuf,
+		char *buf, size_t buflen, struct servent **result)
+{
+  int gc_cycle;
+  int nretries = 0;
+
+  /* If the mapping is available, try to search there instead of
+     communicating with the nscd.  */
+  struct mapped_database *mapped;
+  mapped = __nscd_get_map_ref (GETFDSERV, "services", &__serv_map_handle,
+			       &gc_cycle);
+  size_t protolen = proto == NULL ? 0 : strlen (proto);
+  size_t keylen = critlen + 1 + protolen + 1;
+  char *key = alloca (keylen);
+  memcpy (__mempcpy (__mempcpy (key, crit, critlen),
+		     "/", 1), proto ?: "", protolen + 1);
+
+ retry:;
+  const serv_response_header *serv_resp = NULL;
+  const char *s_name = NULL;
+  const char *s_proto = NULL;
+  const uint32_t *aliases_len = NULL;
+  const char *aliases_list = NULL;
+  int retval = -1;
+  const char *recend = (const char *) ~UINTMAX_C (0);
+  int sock = -1;
+  if (mapped != NO_MAPPING)
+    {
+      const struct datahead *found = __nscd_cache_search (type, key, keylen,
+							  mapped);
+
+      if (found != NULL)
+	{
+	  serv_resp = &found->data[0].servdata;
+	  s_name = (char *) (serv_resp + 1);
+	  s_proto = s_name + serv_resp->s_name_len;
+	  aliases_len = (uint32_t *) (s_proto + serv_resp->s_proto_len);
+	  aliases_list = ((char *) aliases_len
+			  + serv_resp->s_aliases_cnt * sizeof (uint32_t));
+
+#ifndef _STRING_ARCH_unaligned
+	  /* The aliases_len array in the mapped database might very
+	     well be unaligned.  We will access it word-wise so on
+	     platforms which do not tolerate unaligned accesses we
+	     need to make an aligned copy.  */
+	  if (((uintptr_t) aliases_len & (__alignof__ (*aliases_len) - 1))
+	      != 0)
+	    {
+	      uint32_t *tmp = alloca (hst_resp->h_aliases_cnt
+				      * sizeof (uint32_t));
+	      aliases_len = memcpy (tmp, aliases_len,
+				    hst_resp->h_aliases_cnt
+				    * sizeof (uint32_t));
+	    }
+#endif
+	  recend = (const char *) found->data + found->recsize;
+	  if (__builtin_expect ((const char *) aliases_len
+				+ serv_resp->s_aliases_cnt * sizeof (uint32_t)
+				> recend, 0))
+	    goto out_close;
+	}
+    }
+
+  serv_response_header serv_resp_mem;
+  if (serv_resp == NULL)
+    {
+      sock = __nscd_open_socket (key, keylen, type, &serv_resp_mem,
+				 sizeof (serv_resp_mem));
+      if (sock == -1)
+	{
+	  __nss_not_use_nscd_services = 1;
+	  goto out;
+	}
+
+      serv_resp = &serv_resp_mem;
+    }
+
+  /* No value found so far.  */
+  *result = NULL;
+
+  if (__builtin_expect (serv_resp->found == -1, 0))
+    {
+      /* The daemon does not cache this database.  */
+      __nss_not_use_nscd_services = 1;
+      goto out_close;
+    }
+
+  if (serv_resp->found == 1)
+    {
+      char *cp = buf;
+      uintptr_t align1;
+      uintptr_t align2;
+      size_t total_len;
+      ssize_t cnt;
+      int n;
+
+      /* A first check whether the buffer is sufficiently large is possible.  */
+      /* Now allocate the buffer the array for the group members.  We must
+	 align the pointer and the base of the h_addr_list pointers.  */
+      align1 = ((__alignof__ (char *) - (cp - ((char *) 0)))
+		& (__alignof__ (char *) - 1));
+      align2 = ((__alignof__ (char *) - ((cp + align1 + serv_resp->s_name_len
+					  + serv_resp->s_proto_len)
+					 - ((char *) 0)))
+		& (__alignof__ (char *) - 1));
+      if (buflen < (align1 + serv_resp->s_name_len + serv_resp->s_proto_len
+		    + align2
+		    + (serv_resp->s_aliases_cnt + 1) * sizeof (char *)))
+	{
+	no_room:
+	  __set_errno (ERANGE);
+	  retval = ERANGE;
+	  goto out_close;
+	}
+      cp += align1;
+
+      /* Prepare the result as far as we can.  */
+      resultbuf->s_aliases = (char **) cp;
+      cp += (serv_resp->s_aliases_cnt + 1) * sizeof (char *);
+
+      resultbuf->s_name = cp;
+      cp += serv_resp->s_name_len;
+      resultbuf->s_proto = cp;
+      cp += serv_resp->s_proto_len + align2;
+      resultbuf->s_port = serv_resp->s_port;
+
+      if (s_name == NULL)
+	{
+	  struct iovec vec[2];
+
+	  vec[0].iov_base = resultbuf->s_name;
+	  vec[0].iov_len = serv_resp->s_name_len + serv_resp->s_proto_len;
+	  total_len = vec[0].iov_len;
+	  n = 1;
+
+	  if (serv_resp->s_aliases_cnt > 0)
+	    {
+	      aliases_len = alloca (serv_resp->s_aliases_cnt
+				    * sizeof (uint32_t));
+	      vec[n].iov_base = (void *) aliases_len;
+	      vec[n].iov_len = serv_resp->s_aliases_cnt * sizeof (uint32_t);
+
+	      total_len += serv_resp->s_aliases_cnt * sizeof (uint32_t);
+	      ++n;
+	    }
+
+	  if ((size_t) __readvall (sock, vec, n) != total_len)
+	    goto out_close;
+	}
+      else
+	memcpy (resultbuf->s_name, s_name,
+		serv_resp->s_name_len + serv_resp->s_proto_len);
+
+      /*  Now we also can read the aliases.  */
+      total_len = 0;
+      for (cnt = 0; cnt < serv_resp->s_aliases_cnt; ++cnt)
+	{
+	  resultbuf->s_aliases[cnt] = cp;
+	  cp += aliases_len[cnt];
+	  total_len += aliases_len[cnt];
+	}
+      resultbuf->s_aliases[cnt] = NULL;
+
+      if (__builtin_expect ((const char *) aliases_list + total_len > recend,
+			    0))
+	goto out_close;
+      /* See whether this would exceed the buffer capacity.  */
+      if (__builtin_expect (cp > buf + buflen, 0))
+	goto no_room;
+
+      /* And finally read the aliases.  */
+      if (aliases_list == NULL)
+	{
+	  if (total_len == 0
+	      || ((size_t) __readall (sock, resultbuf->s_aliases[0], total_len)
+		  == total_len))
+	    {
+	      retval = 0;
+	      *result = resultbuf;
+	    }
+	}
+      else
+	{
+	  memcpy (resultbuf->s_aliases[0], aliases_list, total_len);
+
+	  /* Try to detect corrupt databases.  */
+	  if (resultbuf->s_name[serv_resp->s_name_len - 1] != '\0'
+	      || resultbuf->s_proto[serv_resp->s_proto_len - 1] != '\0'
+	      || ({for (cnt = 0; cnt < serv_resp->s_aliases_cnt; ++cnt)
+		     if (resultbuf->s_aliases[cnt][aliases_len[cnt] - 1]
+			 != '\0')
+		       break;
+		   cnt < serv_resp->s_aliases_cnt; }))
+	    /* We cannot use the database.  */
+	    goto out_close;
+
+	  retval = 0;
+	  *result = resultbuf;
+	}
+    }
+  else
+    {
+      /* The `errno' to some value != ERANGE.  */
+      __set_errno (ENOENT);
+      /* Even though we have not found anything, the result is zero.  */
+      retval = 0;
+    }
+
+ out_close:
+  if (sock != -1)
+    close_not_cancel_no_status (sock);
+ out:
+  if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0 && retval != -1)
+    {
+      /* When we come here this means there has been a GC cycle while we
+	 were looking for the data.  This means the data might have been
+	 inconsistent.  Retry if possible.  */
+      if ((gc_cycle & 1) != 0 || ++nretries == 5)
+	{
+	  /* nscd is just running gc now.  Disable using the mapping.  */
+	  __nscd_unmap (mapped);
+	  mapped = NO_MAPPING;
+	}
+
+      goto retry;
+    }
+
+  return retval;
+}
diff --git a/nscd/nscd_proto.h b/nscd/nscd_proto.h
index 64d9bd0043..573ca2b2e7 100644
--- a/nscd/nscd_proto.h
+++ b/nscd/nscd_proto.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1998, 1999, 2000, 2002, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 1998-2000, 2002, 2004, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
 
@@ -35,6 +35,7 @@ struct nscd_ai_result;
 extern int __nss_not_use_nscd_passwd attribute_hidden;
 extern int __nss_not_use_nscd_group attribute_hidden;
 extern int __nss_not_use_nscd_hosts attribute_hidden;
+extern int __nss_not_use_nscd_services attribute_hidden;
 
 extern int __nscd_getpwnam_r (const char *name, struct passwd *resultbuf,
 			      char *buffer, size_t buflen,
@@ -64,4 +65,11 @@ extern int __nscd_getai (const char *key, struct nscd_ai_result **result,
 			 int *h_errnop);
 extern int __nscd_getgrouplist (const char *user, gid_t group, long int *size,
 				gid_t **groupsp, long int limit);
+extern int __nscd_getservbyname_r (const char *name, const char *proto,
+				   struct servent *result_buf, char *buf,
+				   size_t buflen, struct servent **result);
+extern int __nscd_getservbyport_r (int port, const char *proto,
+				   struct servent *result_buf, char *buf,
+				   size_t buflen, struct servent **result);
+
 #endif /* _NSCD_PROTO_H */
diff --git a/nscd/pwdcache.c b/nscd/pwdcache.c
index 01c223add5..0461ec91ce 100644
--- a/nscd/pwdcache.c
+++ b/nscd/pwdcache.c
@@ -1,5 +1,5 @@
 /* Cache handling for passwd lookup.
-   Copyright (C) 1998-2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 1998-2005, 2006, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
 
@@ -440,23 +440,14 @@ addpwbyX (struct database_dyn *db, int fd, request_header *req,
 	dbg_log (_("Reloading \"%s\" in password cache!"), keystr);
     }
 
-#if 0
-  uid_t oldeuid = 0;
-  if (db->secure)
-    {
-      oldeuid = geteuid ();
-      pthread_seteuid_np (c_uid);
-    }
-#endif
-
   while (lookup (req->type, key, &resultbuf, buffer, buflen, &pwd) != 0
 	 && (errval = errno) == ERANGE)
     {
-      char *old_buffer = buffer;
       errno = 0;
 
       if (__builtin_expect (buflen > 32768, 0))
 	{
+	  char *old_buffer = buffer;
 	  buflen *= 2;
 	  buffer = (char *) realloc (use_malloc ? buffer : NULL, buflen);
 	  if (buffer == NULL)
@@ -481,11 +472,6 @@ addpwbyX (struct database_dyn *db, int fd, request_header *req,
 	buffer = (char *) extend_alloca (buffer, buflen, 2 * buflen);
     }
 
-#if 0
-  if (db->secure)
-    pthread_seteuid_np (oldeuid);
-#endif
-
   /* Add the entry to the cache.  */
   cache_addpw (db, fd, req, keystr, pwd, c_uid, he, dh, errval);
 
diff --git a/nscd/selinux.c b/nscd/selinux.c
index f0620d1012..4a462223f5 100644
--- a/nscd/selinux.c
+++ b/nscd/selinux.c
@@ -1,5 +1,5 @@
 /* SELinux access controls for nscd.
-   Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Matthew Rickard <mjricka@epoch.ncsc.mil>, 2004.
 
@@ -63,7 +63,12 @@ static const int perms[LASTREQ] =
   [GETFDGR] = NSCD__SHMEMGRP,
   [GETFDHST] = NSCD__SHMEMHOST,
   [GETAI] = NSCD__GETHOST,
-  [INITGROUPS] = NSCD__GETGRP
+  [INITGROUPS] = NSCD__GETGRP,
+#ifdef NSCD__GETSERV
+  [GETSERVBYNAME] = NSCD__GETSERV,
+  [GETSERVBYPORT] = NSCD__GETSERV,
+  [GETFDSERV] = NSCD__SHMEMSERV,
+#endif
 };
 
 /* Store an entry ref to speed AVC decisions.  */
diff --git a/nscd/servicescache.c b/nscd/servicescache.c
new file mode 100644
index 0000000000..ea4fa35100
--- /dev/null
+++ b/nscd/servicescache.c
@@ -0,0 +1,473 @@
+/* Cache handling for services lookup.
+   Copyright (C) 2007 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@drepper.com>, 2007.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include <alloca.h>
+#include <assert.h>
+#include <errno.h>
+#include <libintl.h>
+#include <netdb.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+#include "nscd.h"
+#include "dbg_log.h"
+
+
+/* This is the standard reply in case the service is disabled.  */
+static const serv_response_header disabled =
+{
+  .version = NSCD_VERSION,
+  .found = -1,
+  .s_name_len = 0,
+  .s_proto_len = 0,
+  .s_aliases_cnt = 0,
+  .s_port = -1
+};
+
+/* This is the struct describing how to write this record.  */
+const struct iovec serv_iov_disabled =
+{
+  .iov_base = (void *) &disabled,
+  .iov_len = sizeof (disabled)
+};
+
+
+/* This is the standard reply in case we haven't found the dataset.  */
+static const serv_response_header notfound =
+{
+  .version = NSCD_VERSION,
+  .found = 0,
+  .s_name_len = 0,
+  .s_proto_len = 0,
+  .s_aliases_cnt = 0,
+  .s_port = -1
+};
+
+
+static void
+cache_addserv (struct database_dyn *db, int fd, request_header *req,
+	       const void *key, struct servent *serv, uid_t owner,
+	       struct hashentry *he, struct datahead *dh, int errval)
+{
+  ssize_t total;
+  ssize_t written;
+  time_t t = time (NULL);
+
+  /* We allocate all data in one memory block: the iov vector,
+     the response header and the dataset itself.  */
+  struct dataset
+  {
+    struct datahead head;
+    serv_response_header resp;
+    char strdata[0];
+  } *dataset;
+
+  assert (offsetof (struct dataset, resp) == offsetof (struct datahead, data));
+
+  if (serv == NULL)
+    {
+      if (he != NULL && errval == EAGAIN)
+	{
+	  /* If we have an old record available but cannot find one
+	     now because the service is not available we keep the old
+	     record and make sure it does not get removed.  */
+	  if (reload_count != UINT_MAX)
+	    /* Do not reset the value if we never not reload the record.  */
+	    dh->nreloads = reload_count - 1;
+
+	  written = total = 0;
+	}
+      else
+	{
+	  /* We have no data.  This means we send the standard reply for this
+	     case.  */
+	  total = sizeof (notfound);
+
+	  written = TEMP_FAILURE_RETRY (send (fd, &notfound, total,
+					      MSG_NOSIGNAL));
+
+	  dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len);
+	  /* If we cannot permanently store the result, so be it.  */
+	  if (dataset != NULL)
+	    {
+	      dataset->head.allocsize = sizeof (struct dataset) + req->key_len;
+	      dataset->head.recsize = total;
+	      dataset->head.notfound = true;
+	      dataset->head.nreloads = 0;
+	      dataset->head.usable = true;
+
+	      /* Compute the timeout time.  */
+	      dataset->head.timeout = t + db->negtimeout;
+
+	      /* This is the reply.  */
+	      memcpy (&dataset->resp, &notfound, total);
+
+	      /* Copy the key data.  */
+	      memcpy (dataset->strdata, key, req->key_len);
+
+	      /* If necessary, we also propagate the data to disk.  */
+	      if (db->persistent)
+		{
+		  // XXX async OK?
+		  uintptr_t pval = (uintptr_t) dataset & ~pagesize_m1;
+		  msync ((void *) pval,
+			 ((uintptr_t) dataset & pagesize_m1)
+			 + sizeof (struct dataset) + req->key_len, MS_ASYNC);
+		}
+
+	      /* Now get the lock to safely insert the records.  */
+	      pthread_rwlock_rdlock (&db->lock);
+
+	      if (cache_add (req->type, &dataset->strdata, req->key_len,
+			     &dataset->head, true, db, owner) < 0)
+		/* Ensure the data can be recovered.  */
+		dataset->head.usable = false;
+
+	      pthread_rwlock_unlock (&db->lock);
+
+	      /* Mark the old entry as obsolete.  */
+	      if (dh != NULL)
+		dh->usable = false;
+	    }
+	  else
+	    ++db->head->addfailed;
+	}
+    }
+  else
+    {
+      /* Determine the I/O structure.  */
+      size_t s_name_len = strlen (serv->s_name) + 1;
+      size_t s_proto_len = strlen (serv->s_proto) + 1;
+      uint32_t *s_aliases_len;
+      size_t s_aliases_cnt;
+      char *aliases;
+      char *cp;
+      size_t cnt;
+
+      /* Determine the number of aliases.  */
+      s_aliases_cnt = 0;
+      for (cnt = 0; serv->s_aliases[cnt] != NULL; ++cnt)
+	++s_aliases_cnt;
+      /* Determine the length of all aliases.  */
+      s_aliases_len = (uint32_t *) alloca (s_aliases_cnt * sizeof (uint32_t));
+      total = 0;
+      for (cnt = 0; cnt < s_aliases_cnt; ++cnt)
+	{
+	  s_aliases_len[cnt] = strlen (serv->s_aliases[cnt]) + 1;
+	  total += s_aliases_len[cnt];
+	}
+
+      total += (sizeof (struct dataset)
+		+ s_name_len
+		+ s_proto_len
+		+ s_aliases_cnt * sizeof (uint32_t));
+      written = total;
+
+      /* If we refill the cache, first assume the reconrd did not
+	 change.  Allocate memory on the cache since it is likely
+	 discarded anyway.  If it turns out to be necessary to have a
+	 new record we can still allocate real memory.  */
+      bool alloca_used = false;
+      dataset = NULL;
+
+      if (he == NULL)
+	{
+	  dataset = (struct dataset *) mempool_alloc (db,
+						      total + req->key_len);
+	  if (dataset == NULL)
+	    ++db->head->addfailed;
+	}
+
+      if (dataset == NULL)
+	{
+	  /* We cannot permanently add the result in the moment.  But
+	     we can provide the result as is.  Store the data in some
+	     temporary memory.  */
+	  dataset = (struct dataset *) alloca (total + req->key_len);
+
+	  /* We cannot add this record to the permanent database.  */
+	  alloca_used = true;
+	}
+
+      dataset->head.allocsize = total + req->key_len;
+      dataset->head.recsize = total - offsetof (struct dataset, resp);
+      dataset->head.notfound = false;
+      dataset->head.nreloads = he == NULL ? 0 : (dh->nreloads + 1);
+      dataset->head.usable = true;
+
+      /* Compute the timeout time.  */
+      dataset->head.timeout = t + db->postimeout;
+
+      dataset->resp.version = NSCD_VERSION;
+      dataset->resp.found = 1;
+      dataset->resp.s_name_len = s_name_len;
+      dataset->resp.s_proto_len = s_proto_len;
+      dataset->resp.s_port = serv->s_port;
+      dataset->resp.s_aliases_cnt = s_aliases_cnt;
+
+      cp = dataset->strdata;
+
+      cp = mempcpy (cp, serv->s_name, s_name_len);
+      cp = mempcpy (cp, serv->s_proto, s_proto_len);
+      cp = mempcpy (cp, s_aliases_len, s_aliases_cnt * sizeof (uint32_t));
+
+      /* Then the aliases.  */
+      aliases = cp;
+      for (cnt = 0; cnt < s_aliases_cnt; ++cnt)
+	cp = mempcpy (cp, serv->s_aliases[cnt], s_aliases_len[cnt]);
+
+      assert (cp
+	      == dataset->strdata + total - offsetof (struct dataset,
+						      strdata));
+
+      char *key_copy = memcpy (cp, key, req->key_len);
+
+      /* Now we can determine whether on refill we have to create a new
+	 record or not.  */
+      if (he != NULL)
+	{
+	  assert (fd == -1);
+
+	  if (total + req->key_len == dh->allocsize
+	      && total - offsetof (struct dataset, resp) == dh->recsize
+	      && memcmp (&dataset->resp, dh->data,
+			 dh->allocsize - offsetof (struct dataset, resp)) == 0)
+	    {
+	      /* The data has not changed.  We will just bump the
+		 timeout value.  Note that the new record has been
+		 allocated on the stack and need not be freed.  */
+	      dh->timeout = dataset->head.timeout;
+	      ++dh->nreloads;
+	    }
+	  else
+	    {
+	      /* We have to create a new record.  Just allocate
+		 appropriate memory and copy it.  */
+	      struct dataset *newp
+		= (struct dataset *) mempool_alloc (db, total + req->key_len);
+	      if (newp != NULL)
+		{
+		  /* Adjust pointers into the memory block.  */
+		  aliases = (char *) newp + (aliases - (char *) dataset);
+		  if (key_copy != NULL)
+		    key_copy = (char *) newp + (key_copy - (char *) dataset);
+
+		  dataset = memcpy (newp, dataset, total + req->key_len);
+		  alloca_used = false;
+		}
+
+	      /* Mark the old record as obsolete.  */
+	      dh->usable = false;
+	    }
+	}
+      else
+	{
+	  /* We write the dataset before inserting it to the database
+	     since while inserting this thread might block and so would
+	     unnecessarily keep the receiver waiting.  */
+	  assert (fd != -1);
+
+#ifdef HAVE_SENDFILE
+	  if (__builtin_expect (db->mmap_used, 1) && !alloca_used)
+	    {
+	      assert (db->wr_fd != -1);
+	      assert ((char *) &dataset->resp > (char *) db->data);
+	      assert ((char *) &dataset->resp - (char *) db->head
+		      + total
+		      <= (sizeof (struct database_pers_head)
+			  + db->head->module * sizeof (ref_t)
+			  + db->head->data_size));
+	      written = sendfileall (fd, db->wr_fd,
+				     (char *) &dataset->resp
+				     - (char *) db->head, total);
+# ifndef __ASSUME_SENDFILE
+	      if (written == -1 && errno == ENOSYS)
+		goto use_write;
+# endif
+	    }
+	  else
+# ifndef __ASSUME_SENDFILE
+	  use_write:
+# endif
+#endif
+	    written = writeall (fd, &dataset->resp, total);
+	}
+
+      /* Add the record to the database.  But only if it has not been
+	 stored on the stack.  */
+      if (! alloca_used)
+	{
+	  /* If necessary, we also propagate the data to disk.  */
+	  if (db->persistent)
+	    {
+	      // XXX async OK?
+	      uintptr_t pval = (uintptr_t) dataset & ~pagesize_m1;
+	      msync ((void *) pval,
+		     ((uintptr_t) dataset & pagesize_m1)
+		     + total + req->key_len, MS_ASYNC);
+	    }
+
+	  /* Now get the lock to safely insert the records.  */
+	  pthread_rwlock_rdlock (&db->lock);
+
+	  if (cache_add (req->type, key_copy, req->key_len,
+			 &dataset->head, true, db, owner) < 0)
+	    /* Could not allocate memory.  Make sure the
+	       data gets discarded.  */
+	    dataset->head.usable = false;
+
+	  pthread_rwlock_unlock (&db->lock);
+	}
+    }
+
+  if (__builtin_expect (written != total, 0) && debug_level > 0)
+    {
+      char buf[256];
+      dbg_log (_("short write in %s: %s"),  __FUNCTION__,
+	       strerror_r (errno, buf, sizeof (buf)));
+    }
+}
+
+
+static int
+lookup (int type, char *key, struct servent *resultbufp, char *buffer,
+	size_t buflen, struct servent **serv)
+{
+  char *proto = strrchr (key, '/');
+  if (proto != NULL && proto != key)
+    {
+      key = strndupa (key, proto - key);
+      if (proto[1] == '\0')
+	proto = NULL;
+      else
+	++proto;
+    }
+
+  if (type == GETSERVBYNAME)
+    return __getservbyname_r (key, proto, resultbufp, buffer, buflen, serv);
+
+  assert (type == GETSERVBYPORT);
+  return __getservbyport_r (atol (key), proto, resultbufp, buffer, buflen,
+			    serv);
+}
+
+
+static void
+addservbyX (struct database_dyn *db, int fd, request_header *req,
+	    char *key, uid_t uid, struct hashentry *he, struct datahead *dh)
+{
+  /* Search for the entry matching the key.  Please note that we don't
+     look again in the table whether the dataset is now available.  We
+     simply insert it.  It does not matter if it is in there twice.  The
+     pruning function only will look at the timestamp.  */
+  size_t buflen = 1024;
+  char *buffer = (char *) alloca (buflen);
+  struct servent resultbuf;
+  struct servent *serv;
+  bool use_malloc = false;
+  int errval = 0;
+
+  if (__builtin_expect (debug_level > 0, 0))
+    {
+      if (he == NULL)
+	dbg_log (_("Haven't found \"%s\" in services cache!"), key);
+      else
+	dbg_log (_("Reloading \"%s\" in services cache!"), key);
+    }
+
+  while (lookup (req->type, key, &resultbuf, buffer, buflen, &serv) != 0
+	 && (errval = errno) == ERANGE)
+    {
+      errno = 0;
+
+      if (__builtin_expect (buflen > 32768, 0))
+	{
+	  char *old_buffer = buffer;
+	  buflen *= 2;
+	  buffer = (char *) realloc (use_malloc ? buffer : NULL, buflen);
+	  if (buffer == NULL)
+	    {
+	      /* We ran out of memory.  We cannot do anything but
+		 sending a negative response.  In reality this should
+		 never happen.  */
+	      serv = NULL;
+	      buffer = old_buffer;
+
+	      /* We set the error to indicate this is (possibly) a
+		 temporary error and that it does not mean the entry
+		 is not available at all.  */
+	      errval = EAGAIN;
+	      break;
+	    }
+	  use_malloc = true;
+	}
+      else
+	/* Allocate a new buffer on the stack.  If possible combine it
+	   with the previously allocated buffer.  */
+	buffer = (char *) extend_alloca (buffer, buflen, 2 * buflen);
+    }
+
+  cache_addserv (db, fd, req, key, serv, uid, he, dh, errval);
+
+  if (use_malloc)
+    free (buffer);
+}
+
+
+void
+addservbyname (struct database_dyn *db, int fd, request_header *req,
+	       void *key, uid_t uid)
+{
+  addservbyX (db, fd, req, key, uid, NULL, NULL);
+}
+
+
+void
+readdservbyname (struct database_dyn *db, struct hashentry *he,
+		 struct datahead *dh)
+{
+  request_header req =
+    {
+      .type = GETSERVBYNAME,
+      .key_len = he->len
+    };
+
+  addservbyX (db, -1, &req, db->data + he->key, he->owner, he, dh);
+}
+
+
+void
+addservbyport (struct database_dyn *db, int fd, request_header *req,
+	       void *key, uid_t uid)
+{
+  addservbyX (db, fd, req, key, uid, NULL, NULL);
+}
+
+
+void
+readdservbyport (struct database_dyn *db, struct hashentry *he,
+		 struct datahead *dh)
+{
+  request_header req =
+    {
+      .type = GETSERVBYPORT,
+      .key_len = he->len
+    };
+
+  addservbyX (db, -1, &req, db->data + he->key, he->owner, he, dh);
+}