bk commit into 5.0 tree (jimw:1.1907) BUG#11822

[Jim Winstead]

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5.0 repository of jimw. When jimw does a push these changes will
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ChangeSet
  1.1907 05/07/11 15:52:56 jimw@stripped +2 -0
  Handle systems where 127.0.0.1 doesn't always map to 'localhost'
  first. (Bug #11822)

  sql/sql_parse.cc
    1.444 05/07/11 15:52:52 jimw@stripped +2 -1
    Don't try to modify thd->host if it is a constant.

  sql/hostname.cc
    1.30 05/07/11 15:52:52 jimw@stripped +9 -1
    Short-circuit ip_to_hostname() lookup for INADDR_LOOPBACK to
    always return 'localhost'.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	jimw
# Host:	rama.(none)
# Root:	/home/jimw/my/mysql-5.0-11822

--- 1.29/sql/hostname.cc	2005-05-13 04:04:27 -07:00
+++ 1.30/sql/hostname.cc	2005-07-11 15:52:52 -07:00
@@ -130,15 +130,23 @@
   VOID(pthread_mutex_unlock(&hostname_cache->lock));
 }
 
+/* Deal with systems that don't defined INADDR_LOOPBACK */
+#ifndef INADDR_LOOPBACK
+#define INADDR_LOOPBACK 0x7f000001UL
+#endif
 
 my_string ip_to_hostname(struct in_addr *in, uint *errors)
 {
   uint i;
   host_entry *entry;
   DBUG_ENTER("ip_to_hostname");
+  *errors=0;
+
+  /* We always treat the loopback address as "localhost". */
+  if (in->s_addr == INADDR_LOOPBACK)
+    return (char *)my_localhost;
 
   /* Check first if we have name in cache */
-  *errors=0;
   if (!(specialflag & SPECIAL_NO_HOST_CACHE))
   {
     VOID(pthread_mutex_lock(&hostname_cache->lock));

--- 1.443/sql/sql_parse.cc	2005-07-09 10:55:10 -07:00
+++ 1.444/sql/sql_parse.cc	2005-07-11 15:52:52 -07:00
@@ -792,7 +792,8 @@
 	/* Cut very long hostnames to avoid possible overflows */
 	if (thd->host)
 	{
-	  thd->host[min(strlen(thd->host), HOSTNAME_LENGTH)]= 0;
+          if (thd->host != my_localhost)
+	    thd->host[min(strlen(thd->host), HOSTNAME_LENGTH)]= 0;
 	  thd->host_or_ip= thd->host;
 	}
 	if (connect_errors > max_connect_errors)