Fix a few error cases in *name4_r lookup handling.

5 files changed, 75 insertions, 56 deletions

diff --git a/ChangeLog b/ChangeLog
index d3e71e65e6..7ae5b9f274 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2009-12-10  Ulrich Drepper  <drepper@redhat.com>
+
+	[BZ #11000]
+	* nis/nss_nis/nis-hosts.c (_nss_nis_gethostbyname4_r): Always set
+	*herrnop before returning.
+	* nis/nss_nisplus/nisplus-hosts.c (internal_gethostbyname2_r):
+	Likewise.
+	* nss/nss_files/files-hosts.c (_nss_files_gethostbyname4_r): Handle
+	TRYAGAIN errors separately.
+	* sysdeps/posix/getaddrinfo.c (gaih_inet): Fix error handling of
+	*name4_r after functions.
+
 2009-12-09  Ulrich Drepper  <drepper@redhat.com>
 
 	[BZ #11046]
diff --git a/nis/nss_nis/nis-hosts.c b/nis/nss_nis/nis-hosts.c
index e1db5f531f..18bc77391b 100644
--- a/nis/nss_nis/nis-hosts.c
+++ b/nis/nss_nis/nis-hosts.c
@@ -70,20 +70,20 @@ LINE_PARSER
      {
        assert ((flags & AI_V4MAPPED) == 0 || af != AF_UNSPEC);
        if (flags & AI_V4MAPPED)
-         {
-           map_v4v6_address ((char *) entdata->host_addr,
-                             (char *) entdata->host_addr);
-           result->h_addrtype = AF_INET6;
-           result->h_length = IN6ADDRSZ;
-         }
+	 {
+	   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;
-         }
+	 {
+	   result->h_addrtype = AF_INET;
+	   result->h_length = INADDRSZ;
+	 }
      }
    else if (af != AF_INET
-            && inet_pton (AF_INET6, addr, entdata->host_addr) > 0)
+	    && inet_pton (AF_INET6, addr, entdata->host_addr) > 0)
      {
        result->h_addrtype = AF_INET6;
        result->h_length = IN6ADDRSZ;
@@ -164,14 +164,14 @@ internal_nis_gethostent_r (struct hostent *host, char *buffer,
       int keylen;
       int yperr;
       if (new_start)
-        yperr = yp_first (domain, "hosts.byname", &outkey, &keylen, &result,
+	yperr = yp_first (domain, "hosts.byname", &outkey, &keylen, &result,
 			  &len);
       else
-        yperr = yp_next (domain, "hosts.byname", oldkey, oldkeylen, &outkey,
+	yperr = yp_next (domain, "hosts.byname", oldkey, oldkeylen, &outkey,
 			 &keylen, &result, &len);
 
       if (__builtin_expect (yperr != YPERR_SUCCESS, 0))
-        {
+	{
 	  enum nss_status retval = yperr2nss (yperr);
 
 	  switch (retval)
@@ -191,12 +191,12 @@ internal_nis_gethostent_r (struct hostent *host, char *buffer,
 	}
 
       if (__builtin_expect ((size_t) (len + 1) > linebuflen, 0))
-        {
-          free (result);
+	{
+	  free (result);
 	  *h_errnop = NETDB_INTERNAL;
-          *errnop = ERANGE;
-          return NSS_STATUS_TRYAGAIN;
-        }
+	  *errnop = ERANGE;
+	  return NSS_STATUS_TRYAGAIN;
+	}
 
       char *p = strncpy (data->linebuffer, result, len);
       data->linebuffer[len] = '\0';
@@ -233,7 +233,7 @@ _nss_nis_gethostent_r (struct hostent *host, char *buffer, size_t buflen,
   __libc_lock_lock (lock);
 
   status = internal_nis_gethostent_r (host, buffer, buflen, errnop, h_errnop,
-		        ((_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET),
+			((_res.options & RES_USE_INET6) ? AF_INET6 : AF_INET),
 			((_res.options & RES_USE_INET6) ? AI_V4MAPPED : 0 ));
 
   __libc_lock_unlock (lock);
@@ -346,7 +346,7 @@ _nss_nis_gethostbyname2_r (const char *name, int af, struct hostent *host,
 
   return internal_gethostbyname2_r (name, af, host, buffer, buflen, errnop,
 				    h_errnop,
-		        ((_res.options & RES_USE_INET6) ? AI_V4MAPPED : 0));
+			((_res.options & RES_USE_INET6) ? AI_V4MAPPED : 0));
 }
 
 
@@ -456,7 +456,10 @@ _nss_nis_gethostbyname4_r (const char *name, struct gaih_addrtuple **pat,
 {
   char *domain;
   if (yp_get_default_domain (&domain))
-    return NSS_STATUS_UNAVAIL;
+    {
+      *herrnop = NO_DATA;
+      return NSS_STATUS_UNAVAIL;
+    }
 
   /* Convert name to lowercase.  */
   size_t namlen = strlen (name);
diff --git a/nis/nss_nisplus/nisplus-hosts.c b/nis/nss_nisplus/nisplus-hosts.c
index 37d44773fc..eca64c97e6 100644
--- a/nis/nss_nisplus/nisplus-hosts.c
+++ b/nis/nss_nisplus/nisplus-hosts.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2003, 2005, 2006, 2008 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2003, 2005, 2006, 2008, 2009 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1997.
 
@@ -38,10 +38,10 @@ static nis_name tablename_val;
 static u_long tablename_len;
 
 #define NISENTRYVAL(idx, col, res) \
-        (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
+	(NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
 
 #define NISENTRYLEN(idx, col, res) \
-        (NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
+	(NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
 
 /* Get implementation for some internal functions. */
 #include <resolv/mapv4v6addr.h>
@@ -287,15 +287,15 @@ internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
 	      return NSS_STATUS_TRYAGAIN;
 	    }
 	  if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
-            {
-              enum nss_status retval = niserr2nss (result->status);
-              if (retval == NSS_STATUS_TRYAGAIN)
-                {
-                  *herrnop = NETDB_INTERNAL;
-                  *errnop = errno;
-                }
-              return retval;
-            }
+	    {
+	      enum nss_status retval = niserr2nss (result->status);
+	      if (retval == NSS_STATUS_TRYAGAIN)
+		{
+		  *herrnop = NETDB_INTERNAL;
+		  *errnop = errno;
+		}
+	      return retval;
+	    }
 
 	}
       else
@@ -308,18 +308,18 @@ internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
 	      return NSS_STATUS_TRYAGAIN;
 	    }
 	  if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
-            {
-              enum nss_status retval= niserr2nss (result->status);
+	    {
+	      enum nss_status retval= niserr2nss (result->status);
 
 	      nis_freeresult (result);
 	      result = saved_res;
-              if (retval == NSS_STATUS_TRYAGAIN)
-                {
-                  *herrnop = NETDB_INTERNAL;
+	      if (retval == NSS_STATUS_TRYAGAIN)
+		{
+		  *herrnop = NETDB_INTERNAL;
 		  *errnop = errno;
-                }
-              return retval;
-            }
+		}
+	      return retval;
+	    }
 	}
 
       if (_res.options & RES_USE_INET6)
@@ -330,13 +330,13 @@ internal_nisplus_gethostent_r (struct hostent *host, char *buffer,
 						buflen, errnop, 0);
 
       if (parse_res == -1)
-        {
+	{
 	  nis_freeresult (result);
 	  result = saved_res;
-          *herrnop = NETDB_INTERNAL;
+	  *herrnop = NETDB_INTERNAL;
 	  *errnop = ERANGE;
-          return NSS_STATUS_TRYAGAIN;
-        }
+	  return NSS_STATUS_TRYAGAIN;
+	}
       if (saved_res != NULL)
 	nis_freeresult (saved_res);
 
@@ -435,6 +435,7 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
   if (result == NULL)
     {
       *errnop = ENOMEM;
+      *herrnop = NETDB_INTERNAL;
       return NSS_STATUS_TRYAGAIN;
     }
 
@@ -444,10 +445,13 @@ internal_gethostbyname2_r (const char *name, int af, struct hostent *host,
       if (retval == NSS_STATUS_TRYAGAIN)
 	{
 	  *errnop = errno;
-	  *herrnop = NETDB_INTERNAL;
+	  *herrnop = TRY_AGAIN;
 	}
       else
-	__set_errno (olderr);
+	{
+	  __set_errno (olderr);
+	  *herrnop = NETDB_INTERNAL;
+	}
       nis_freeresult (result);
       return retval;
     }
@@ -502,7 +506,7 @@ _nss_nisplus_gethostbyname_r (const char *name, struct hostent *host,
 					  buflen, errnop, h_errnop,
 					  AI_V4MAPPED);
       if (status == NSS_STATUS_SUCCESS)
-        return status;
+	return status;
     }
 
   return internal_gethostbyname2_r (name, AF_INET, host, buffer,
diff --git a/nss/nss_files/files-hosts.c b/nss/nss_files/files-hosts.c
index 68fb969937..e5f5b48b72 100644
--- a/nss/nss_files/files-hosts.c
+++ b/nss/nss_files/files-hosts.c
@@ -423,6 +423,11 @@ _nss_files_gethostbyname4_r (const char *name, struct gaih_addrtuple **pat,
       if (! keep_stream)
 	internal_endent ();
     }
+  else if (status == NSS_STATUS_TRYAGAIN)
+    {
+      *errnop = errno;
+      *herrnop = TRY_AGAIN;
+    }
   else
     {
       *errnop = errno;
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
index a788d18fee..62c38f69be 100644
--- a/sysdeps/posix/getaddrinfo.c
+++ b/sysdeps/posix/getaddrinfo.c
@@ -719,13 +719,8 @@ gaih_inet (const char *name, const struct gaih_service *service,
 		      if (status != NSS_STATUS_TRYAGAIN
 			  || rc != ERANGE || herrno != NETDB_INTERNAL)
 			{
-			  if (herrno == NETDB_INTERNAL)
-			    {
-			      __set_h_errno (herrno);
-			      _res.options = old_res_options;
-			      return -EAI_SYSTEM;
-			    }
-			  if (herrno == TRY_AGAIN)
+			  if (status == NSS_STATUS_TRYAGAIN
+			      && herrno == TRY_AGAIN)
 			    no_data = EAI_AGAIN;
 			  else
 			    no_data = herrno == NO_DATA;