(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

1 files changed, 115 insertions, 142 deletions

diff --git a/nis/nss_nisplus/nisplus-alias.c b/nis/nss_nisplus/nisplus-alias.c
index 57858721a1..152e5fc3fc 100644
--- a/nis/nss_nisplus/nisplus-alias.c
+++ b/nis/nss_nisplus/nisplus-alias.c
@@ -1,5 +1,4 @@
-/* Copyright (C) 1997, 1998, 2001, 2002, 2003, 2005, 2006
-   Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 2001, 2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
 
@@ -18,7 +17,6 @@
    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
    02111-1307 USA.  */
 
-#include <atomic.h>
 #include <nss.h>
 #include <errno.h>
 #include <ctype.h>
@@ -34,39 +32,32 @@ __libc_lock_define_initialized (static, lock)
 static nis_result *result;
 static u_long next_entry;
 static nis_name tablename_val;
-static size_t tablename_len;
+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)
+#define NISENTRYVAL(idx,col,res) \
+        ((res)->objects.objects_val[(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)
+#define NISENTRYLEN(idx,col,res) \
+        ((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
 
 static enum nss_status
 _nss_create_tablename (int *errnop)
 {
   if (tablename_val == NULL)
     {
-      const char *local_dir = nis_local_directory ();
-      size_t local_dir_len = strlen (local_dir);
-      static const char prefix[] = "mail_aliases.org_dir.";
+      char buf [40 + strlen (nis_local_directory ())];
+      char *p;
 
-      char *p = malloc (sizeof (prefix) + local_dir_len);
-      if (p == NULL)
+      p = __stpcpy (buf, "mail_aliases.org_dir.");
+      p = __stpcpy (p, nis_local_directory ());
+      tablename_val = __strdup (buf);
+      if (tablename_val == NULL)
 	{
 	  *errnop = errno;
 	  return NSS_STATUS_TRYAGAIN;
 	}
-
-      memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1);
-
-      tablename_len = sizeof (prefix) - 1 + local_dir_len;
-
-      atomic_write_barrier ();
-
-      tablename_val = p;
+      tablename_len = strlen (tablename_val);
     }
-
   return NSS_STATUS_SUCCESS;
 }
 
@@ -79,87 +70,86 @@ _nss_nisplus_parse_aliasent (nis_result *result, unsigned long entry,
     return 0;
 
   if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
-      || __type_of (&NIS_RES_OBJECT (result)[entry]) != NIS_ENTRY_OBJ
-      || strcmp (NIS_RES_OBJECT (result)[entry].EN_data.en_type,
+      || __type_of (&result->objects.objects_val[entry]) != NIS_ENTRY_OBJ
+      || strcmp (result->objects.objects_val[entry].EN_data.en_type,
 		 "mail_aliases") != 0
-      || NIS_RES_OBJECT (result)[entry].EN_data.en_cols.en_cols_len < 2)
+      || result->objects.objects_val[entry].EN_data.en_cols.en_cols_len < 2)
     return 0;
-
-  if (NISENTRYLEN (entry, 1, result) >= buflen)
-    {
-      /* The line is too long for our buffer.  */
-    no_more_room:
-      *errnop = ERANGE;
-      return -1;
-    }
-
-  char *cp = __stpncpy (buffer, NISENTRYVAL (entry, 1, result),
-			NISENTRYLEN (entry, 1, result));
-  *cp = '\0';
-
-  char *first_unused = cp + 1;
-  size_t room_left = buflen - (first_unused - buffer);
-
-  alias->alias_local = 0;
-  alias->alias_members_len = 0;
-
-  if (NISENTRYLEN (entry, 0, result) >= room_left)
-    goto no_more_room;
-
-  cp = __stpncpy (first_unused, NISENTRYVAL (entry, 0, result),
-		  NISENTRYLEN (entry, 0, result));
-  *cp = '\0';
-  alias->alias_name = first_unused;
-
-  /* Terminate the line for any case.  */
-  cp = strpbrk (alias->alias_name, "#\n");
-  if (cp != NULL)
-    *cp = '\0';
-
-  size_t len = strlen (alias->alias_name) + 1;
-  first_unused += len;
-  room_left -= len;
-
-  /* Adjust the pointer so it is aligned for
-     storing pointers.  */
-  size_t adjust = ((__alignof__ (char *)
-		    - (first_unused - (char *) 0) % __alignof__ (char *))
-		   % __alignof__ (char *));
-  if (room_left < adjust)
-    goto no_more_room;
-  first_unused += adjust;
-  room_left -= adjust;
-
-  alias->alias_members = (char **) first_unused;
-
-  char *line = buffer;
-  while (*line != '\0')
+  else
     {
-      /* Skip leading blanks.  */
-      while (isspace (*line))
-	++line;
-
-      if (*line == '\0')
-	break;
+      char *first_unused = buffer + NISENTRYLEN (0, 1, result) + 1;
+      size_t room_left =
+	buflen - (buflen % __alignof__ (char *)) -
+	NISENTRYLEN (0, 1, result) - 2;
+      char *line;
+      char *cp;
+
+      if (NISENTRYLEN (entry, 1, result) >= buflen)
+	{
+	  /* The line is too long for our buffer.  */
+	no_more_room:
+	  *errnop = ERANGE;
+	  return -1;
+	}
+      else
+	{
+	  cp = __stpncpy (buffer, NISENTRYVAL (entry, 1, result),
+			 NISENTRYLEN (entry, 1, result));
+	  *cp = '\0';
+	}
 
-      if (room_left < sizeof (char *))
+      if (NISENTRYLEN(entry, 0, result) >= room_left)
 	goto no_more_room;
-      room_left -= sizeof (char *);
-      alias->alias_members[alias->alias_members_len] = line;
-
-      while (*line != '\0' && *line != ',')
-	++line;
 
-      if (line != alias->alias_members[alias->alias_members_len])
+      alias->alias_local = 0;
+      alias->alias_members_len = 0;
+      *first_unused = '\0';
+      ++first_unused;
+      cp = __stpncpy (first_unused, NISENTRYVAL (entry, 0, result),
+		      NISENTRYLEN (entry, 0, result));
+      *cp = '\0';
+      alias->alias_name = first_unused;
+
+      /* Terminate the line for any case.  */
+      cp = strpbrk (alias->alias_name, "#\n");
+      if (cp != NULL)
+	*cp = '\0';
+
+      first_unused += strlen (alias->alias_name) +1;
+      /* Adjust the pointer so it is aligned for
+	 storing pointers.  */
+      first_unused += __alignof__ (char *) - 1;
+      first_unused -= ((first_unused - (char *) 0) % __alignof__ (char *));
+      alias->alias_members = (char **) first_unused;
+
+      line = buffer;
+
+      while (*line != '\0')
 	{
-	  *line++ = '\0';
-	  ++alias->alias_members_len;
+	  /* Skip leading blanks.  */
+	  while (isspace (*line))
+	    ++line;
+
+	  if (*line == '\0')
+	    break;
+
+	  if (room_left < sizeof (char *))
+	    goto no_more_room;
+	  room_left -= sizeof (char *);
+	  alias->alias_members[alias->alias_members_len] = line;
+
+	  while (*line != '\0' && *line != ',')
+	    ++line;
+
+	  if (line != alias->alias_members[alias->alias_members_len])
+	    {
+	      *line++ = '\0';
+	      alias->alias_members_len++;
+	    }
 	}
-      else if (*line == ',')
-	++line;
-    }
 
-  return alias->alias_members_len == 0 ? 0 : 1;
+      return alias->alias_members_len == 0 ? 0 : 1;
+    }
 }
 
 static enum nss_status
@@ -168,11 +158,9 @@ internal_setaliasent (void)
   enum nss_status status;
   int err;
 
-  if (result !=  NULL)
-    {
-      nis_freeresult (result);
-      result = NULL;
-    }
+  if (result)
+    nis_freeresult (result);
+  result = NULL;
 
   if (_nss_create_tablename (&err) != NSS_STATUS_SUCCESS)
     return NSS_STATUS_UNAVAIL;
@@ -215,11 +203,9 @@ _nss_nisplus_endaliasent (void)
 {
   __libc_lock_lock (lock);
 
-  if (result != NULL)
-    {
-      nis_freeresult (result);
-      result = NULL;
-    }
+  if (result)
+    nis_freeresult (result);
+  result = NULL;
   next_entry = 0;
 
   __libc_lock_unlock (lock);
@@ -254,8 +240,7 @@ internal_nisplus_getaliasent_r (struct aliasent *alias,
 	return NSS_STATUS_TRYAGAIN;
 
       ++next_entry;
-    }
-  while (!parse_res);
+    } while (!parse_res);
 
   return NSS_STATUS_SUCCESS;
 }
@@ -283,12 +268,7 @@ _nss_nisplus_getaliasbyname_r (const char *name, struct aliasent *alias,
 
   if (tablename_val == NULL)
     {
-      __libc_lock_lock (lock);
-
       enum nss_status status = _nss_create_tablename (errnop);
-
-      __libc_lock_unlock (lock);
-
       if (status != NSS_STATUS_SUCCESS)
 	return status;
     }
@@ -298,42 +278,35 @@ _nss_nisplus_getaliasbyname_r (const char *name, struct aliasent *alias,
       *errnop = EINVAL;
       return NSS_STATUS_UNAVAIL;
     }
-
-  char buf[strlen (name) + 9 + tablename_len];
-  int olderr = errno;
-
-  snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val);
-
-  nis_result *result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
-
-  if (result == NULL)
+  else
     {
-      *errnop = ENOMEM;
-      return NSS_STATUS_TRYAGAIN;
-    }
+      nis_result *result;
+      char buf[strlen (name) + 30 + tablename_len];
+      int olderr = errno;
 
-  if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0))
-    {
-      enum nss_status status = niserr2nss (result->status);
-      nis_freeresult (result);
-      return status;
-    }
+      sprintf (buf, "[name=%s],%s", name, tablename_val);
 
-  parse_res = _nss_nisplus_parse_aliasent (result, 0, alias,
-					   buffer, buflen, errnop);
+      result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
 
-  /* We do not need the lookup result anymore.  */
-  nis_freeresult (result);
+      if (result == NULL)
+	{
+	  *errnop = ENOMEM;
+	  return NSS_STATUS_TRYAGAIN;
+	}
+      if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
+	return niserr2nss (result->status);
 
-  if (__builtin_expect (parse_res < 1, 0))
-    {
-      __set_errno (olderr);
+      parse_res = _nss_nisplus_parse_aliasent (result, 0, alias,
+					       buffer, buflen, errnop);
+      if (parse_res < 1)
+	{
+	  __set_errno (olderr);
 
-      if (parse_res == -1)
-	return NSS_STATUS_TRYAGAIN;
-      else
-	return NSS_STATUS_NOTFOUND;
+	  if (parse_res == -1)
+	    return NSS_STATUS_TRYAGAIN;
+	  else
+	    return NSS_STATUS_NOTFOUND;
+	}
+      return NSS_STATUS_SUCCESS;
     }
-
-  return NSS_STATUS_SUCCESS;
 }