--- ../../SOURCES/httpd-2.2.3/modules/loggers/mod_log_config.c	2006-07-11 20:38:44.000000000 -0700
+++ modules/loggers/mod_log_config.c	2006-09-22 10:43:40.000000000 -0700
@@ -272,6 +272,7 @@
     char *arg;
     int condition_sense;
     int want_orig;
+    int want_empty;
     apr_array_header_t *conditions;
 } log_format_item;
 
@@ -283,7 +284,7 @@
 static char *pfmt(apr_pool_t *p, int i)
 {
     if (i <= 0) {
-        return "-";
+        return NULL; 
     }
     else {
         return format_integer(p, i);
@@ -322,7 +323,7 @@
     char *rvalue = r->user;
 
     if (rvalue == NULL) {
-        rvalue = "-";
+        return NULL;
     }
     else if (strlen(rvalue) == 0) {
         rvalue = "\"\"";
@@ -381,7 +382,7 @@
 static const char *clf_log_bytes_sent(request_rec *r, char *a)
 {
     if (!r->sent_bodyct || !r->bytes_sent) {
-        return "-";
+        return NULL; 
     }
     else {
         return apr_off_t_toa(r->pool, r->bytes_sent);
@@ -774,6 +775,8 @@
     it->want_orig = -1;
     it->arg = "";               /* For safety's sake... */
 
+    it->want_empty = 0;
+
     while (*s) {
         int i;
 
@@ -802,6 +805,11 @@
             it->arg = ap_getword(p, &s, '}');
             break;
 
+        case '^':
+            ++s;
+            it->want_empty = 1;
+            break;
+
         case '0':
         case '1':
         case '2':
@@ -887,14 +895,18 @@
 
         if ((item->condition_sense && in_list)
             || (!item->condition_sense && !in_list)) {
-            return "-";
+            return item->want_empty ? "" : "-";
         }
     }
 
     /* We do.  Do it... */
 
     cp = (*item->func) (item->want_orig ? orig : r, item->arg);
-    return cp ? cp : "-";
+
+    if (cp == NULL)
+        return item->want_empty ? "" : "-";
+
+    return cp;
 }
 
 static void flush_log(buffered_log *buf)
@@ -1375,7 +1387,7 @@
 
         pl = ap_open_piped_log(p, name + 1);
         if (pl == NULL) {
-           return NULL;;
+           return NULL;
         }
         return ap_piped_log_write_fd(pl);
     }