Description: Fruit does not calculate a move to make because it expects the go command 
to have arguments, e.g. 'go wtime 30000'. This is because it looks for a string starting 
with "go " instead of just "go". If that change is made it appears to just do an infinite 
search. I've attached a patch that allows the simple go command and searches to depth 5 
if no arguments are passed to go.
Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/fruit/+bug/74764
Author: Robert Ancell, robert.ancell@canonical.com


Index: fruit-2.1.dfsg-1.orig/src/protocol.cpp
===================================================================
--- fruit-2.1.dfsg-1.orig.orig/src/protocol.cpp	2010-12-09 12:34:30.000000000 +0100
+++ fruit-2.1.dfsg-1.orig/src/protocol.cpp	2010-12-13 09:49:11.000000000 +0100
@@ -129,7 +129,7 @@
 
       // dummy
 
-   } else if (string_start_with(string,"go ")) {
+   } else if (string_start_with(string,"go")) {
 
       if (!Searching && !Delay) {
          init();
@@ -230,7 +230,7 @@
 
    const char * ptr;
    bool infinite, ponder;
-   int depth, mate, movestogo;
+   int depth, mate, movestogo, arg_count;
    sint64 nodes;
    double binc, btime, movetime, winc, wtime;
    double time, inc;
@@ -257,7 +257,10 @@
 
    ptr = strtok(string," "); // skip "go"
 
+   arg_count = 0;
    for (ptr = strtok(NULL," "); ptr != NULL; ptr = strtok(NULL," ")) {
+	arg_count++;
+
 
       if (false) {
 
@@ -344,9 +347,16 @@
 
          wtime = double(atoi(ptr)) / 1000.0;
          ASSERT(wtime>=0.0);
-      }
+      } else 
+	arg_count--;
    }
 
+    
+    // If no arguments default to search depth 5
+    if (arg_count == 0)
+       depth = 5;
+
+
    // init
 
    search_clear();