diff -Naur mysql-5.1.7-beta.a/include/my_sys.h mysql-5.1.7-beta.b/include/my_sys.h
--- mysql-5.1.7-beta.a/include/my_sys.h	2006-02-27 21:25:08.000000000 +0000
+++ mysql-5.1.7-beta.b/include/my_sys.h	2006-04-12 16:43:44.000000000 +0000
@@ -601,6 +601,11 @@
 				    const char *sFile, uint uLine,
 				    myf MyFlag);
 
+/* implemented in my_memmem.c */
+extern void *my_memmem(const void *haystack, size_t haystacklen,
+    const void *needle, size_t needlelen);
+
+
 #ifdef __WIN__
 extern int my_access(const char *path, int amode);
 extern File my_sopen(const char *path, int oflag, int shflag, int pmode);
diff -Naur mysql-5.1.7-beta.a/mysql-test/t/mysql_client_test.opt mysql-5.1.7-beta.b/mysql-test/t/mysql_client_test.opt
--- mysql-5.1.7-beta.a/mysql-test/t/mysql_client_test.opt	1970-01-01 00:00:00.000000000 +0000
+++ mysql-5.1.7-beta.b/mysql-test/t/mysql_client_test.opt	2006-04-12 16:43:44.000000000 +0000
@@ -0,0 +1 @@
+--log
diff -Naur mysql-5.1.7-beta.a/mysys/Makefile.am mysql-5.1.7-beta.b/mysys/Makefile.am
--- mysql-5.1.7-beta.a/mysys/Makefile.am	2006-02-27 21:25:08.000000000 +0000
+++ mysql-5.1.7-beta.b/mysys/Makefile.am	2006-04-12 16:43:44.000000000 +0000
@@ -56,6 +56,7 @@
 			charset.c charset-def.c my_bitmap.c my_bit.c md5.c \
 			my_gethostbyname.c rijndael.c my_aes.c sha1.c \
 			my_handler.c my_netware.c my_largepage.c \
+			my_memmem.c \
 			my_windac.c my_access.c base64.c
 EXTRA_DIST =		thr_alarm.c thr_lock.c my_pthread.c my_thr_init.c \
 			thr_mutex.c thr_rwlock.c
diff -Naur mysql-5.1.7-beta.a/mysys/Makefile.in mysql-5.1.7-beta.b/mysys/Makefile.in
--- mysql-5.1.7-beta.a/mysys/Makefile.in	2006-02-27 21:26:51.000000000 +0000
+++ mysql-5.1.7-beta.b/mysys/Makefile.in	2006-04-12 16:43:44.000000000 +0000
@@ -515,6 +515,7 @@
 			charset.c charset-def.c my_bitmap.c my_bit.c md5.c \
 			my_gethostbyname.c rijndael.c my_aes.c sha1.c \
 			my_handler.c my_netware.c my_largepage.c \
+			my_memmem.c \
 			my_windac.c my_access.c base64.c
 
 EXTRA_DIST = thr_alarm.c thr_lock.c my_pthread.c my_thr_init.c \
diff -Naur mysql-5.1.7-beta.a/mysys/mf_iocache2.c mysql-5.1.7-beta.b/mysys/mf_iocache2.c
--- mysql-5.1.7-beta.a/mysys/mf_iocache2.c	2006-02-27 21:24:53.000000000 +0000
+++ mysql-5.1.7-beta.b/mysys/mf_iocache2.c	2006-04-12 16:43:44.000000000 +0000
@@ -252,6 +252,10 @@
 uint my_b_vprintf(IO_CACHE *info, const char* fmt, va_list args)
 {
   uint out_length=0;
+  uint minimum_width; /* as yet unimplemented */
+  uint minimum_width_sign;
+  uint precision; /* as yet unimplemented for anything but %b */
+  const char* backtrack;
 
   for (; *fmt ; fmt++)
   {
@@ -272,17 +276,53 @@
       fmt++;
       /* Found one '%' */
     }
+    backtrack= fmt;
+
+    minimum_width= 0;
+    precision= 0;
+    minimum_width_sign= 1;
     /* Skip if max size is used (to be compatible with printf) */
-    while (my_isdigit(&my_charset_latin1, *fmt) || *fmt == '.' || *fmt == '-')
+    while (*fmt == '-') { fmt++; minimum_width_sign= -1; }
+    if (*fmt == '*') {
+      precision= (int) va_arg(args, int);
+      fmt++;
+    } else {
+      while (my_isdigit(&my_charset_latin1, *fmt)) {
+        minimum_width=(minimum_width * 10) + (*fmt - '0');
+        fmt++;
+      }
+    }
+    minimum_width*= minimum_width_sign;
+
+    if (*fmt == '.') {
       fmt++;
+      if (*fmt == '*') {
+        precision= (int) va_arg(args, int);
+        fmt++;
+      } else {
+        while (my_isdigit(&my_charset_latin1, *fmt)) {
+          precision=(precision * 10) + (*fmt - '0');
+          fmt++;
+        }
+      }
+    }
+
     if (*fmt == 's')				/* String parameter */
     {
       reg2 char *par = va_arg(args, char *);
       uint length = (uint) strlen(par);
+      /* TODO: implement minimum width and precision */
       out_length+=length;
       if (my_b_write(info, par, length))
 	goto err;
     }
+    else if (*fmt == 'b')				/* Sized buffer parameter, only precision makes sense */
+    {
+      reg2 char *par = va_arg(args, char *);
+      out_length+=precision;
+      if (my_b_write(info, par, precision))
+        goto err;
+    }
     else if (*fmt == 'd' || *fmt == 'u')	/* Integer parameter */
     {
       register int iarg;
@@ -320,6 +360,9 @@
       if (my_b_write(info, "%", 1))
 	goto err;
       out_length++;
+      if (my_b_write(info, backtrack, fmt-backtrack))
+        goto err;
+      out_length+= fmt-backtrack;
     }
   }
   return out_length;
diff -Naur mysql-5.1.7-beta.a/mysys/my_memmem.c mysql-5.1.7-beta.b/mysys/my_memmem.c
--- mysql-5.1.7-beta.a/mysys/my_memmem.c	1970-01-01 00:00:00.000000000 +0000
+++ mysql-5.1.7-beta.b/mysys/my_memmem.c	2006-04-12 16:43:44.000000000 +0000
@@ -0,0 +1,21 @@
+#include "my_base.h"
+
+/*
+ *   my_memmem, port of a GNU extension.
+ *
+ *     Returns a pointer to the beginning of the substring, needle, or NULL if the
+ *       substring is not found in haystack.
+ *       */
+void *my_memmem(const void *haystack, size_t haystacklen,
+    const void *needle, size_t needlelen)
+{
+  const void *cursor;
+  const void *end_of_search_beginning = haystack + haystacklen - needlelen;
+
+  for (cursor = haystack; cursor <= end_of_search_beginning; cursor++) {
+    if (memcmp(needle, cursor, needlelen) == 0) {
+      return((void *) cursor);
+    }
+  }
+  return(NULL);
+}
diff -Naur mysql-5.1.7-beta.a/strings/my_vsnprintf.c mysql-5.1.7-beta.b/strings/my_vsnprintf.c
--- mysql-5.1.7-beta.a/strings/my_vsnprintf.c	2006-02-27 21:24:52.000000000 +0000
+++ mysql-5.1.7-beta.b/strings/my_vsnprintf.c	2006-04-12 16:43:44.000000000 +0000
@@ -27,6 +27,7 @@
     %#[l]d
     %#[l]u
     %#[l]x
+    %#.#b 	Local format; note first # is ignored and second is REQUIRED
     %#.#s	Note first # is ignored
     
   RETURN
@@ -38,9 +39,18 @@
   char *start=to, *end=to+n-1;
   uint length, width, pre_zero, have_long;
 
+  const char *backtrack;  
+  /* 
+   For the special case when we discover that we shouldn't have been
+   interpreting a percent-format. 
+
+   This is here so we can be forgiving about our special local formats.
+   */
+
   for (; *fmt ; fmt++)
   {
-    if (fmt[0] != '%')
+    backtrack = fmt;
+    if (*fmt != '%')
     {
       if (to == end)			/* End of buffer */
 	break;
@@ -95,6 +105,12 @@
       to=strnmov(to,par,plen);
       continue;
     }
+    else if (*fmt == 'b')				/* Buffer parameter */
+    {
+      reg2 char *par = va_arg(ap, char *);
+      to=memmove(to, par, abs(width));
+      continue;
+    }
     else if (*fmt == 'd' || *fmt == 'u'|| *fmt== 'x')	/* Integer parameter */
     {
       register long larg;
diff -Naur mysql-5.1.7-beta.a/tests/Makefile.am mysql-5.1.7-beta.b/tests/Makefile.am
--- mysql-5.1.7-beta.a/tests/Makefile.am	2006-02-27 21:24:57.000000000 +0000
+++ mysql-5.1.7-beta.b/tests/Makefile.am	2006-04-12 16:43:44.000000000 +0000
@@ -42,7 +42,7 @@
 LIBS =			@CLIENT_LIBS@
 LDADD =			@CLIENT_EXTRA_LDFLAGS@ \
                         $(top_builddir)/libmysql/libmysqlclient.la
-mysql_client_test_LDADD= $(LDADD) $(CXXLDFLAGS)
+mysql_client_test_LDADD= $(LDADD) $(CXXLDFLAGS) -lmysys -L../mysys
 mysql_client_test_SOURCES= mysql_client_test.c $(yassl_dummy_link_fix)
 insert_test_SOURCES=       insert_test.c $(yassl_dummy_link_fix)
 select_test_SOURCES=       select_test.c $(yassl_dummy_link_fix)
diff -Naur mysql-5.1.7-beta.a/tests/Makefile.in mysql-5.1.7-beta.b/tests/Makefile.in
--- mysql-5.1.7-beta.a/tests/Makefile.in	2006-02-27 21:27:19.000000000 +0000
+++ mysql-5.1.7-beta.b/tests/Makefile.in	2006-04-12 16:43:44.000000000 +0000
@@ -420,7 +420,7 @@
 LDADD = @CLIENT_EXTRA_LDFLAGS@ \
                         $(top_builddir)/libmysql/libmysqlclient.la
 
-mysql_client_test_LDADD = $(LDADD) $(CXXLDFLAGS)
+mysql_client_test_LDADD = $(LDADD) $(CXXLDFLAGS) -lmysys -L../mysys
 mysql_client_test_SOURCES = mysql_client_test.c $(yassl_dummy_link_fix)
 insert_test_SOURCES = insert_test.c $(yassl_dummy_link_fix)
 select_test_SOURCES = select_test.c $(yassl_dummy_link_fix)