[ppc patch] fix keyboard read

[Hollis Blanchard]

This patch fixes keyboard input on the briQ; with the existing code it 
tends to loop forever printing the same character. The "read" method 
returns 0 *or* a negative number on failure. Apparently CodeGen uses 
negative numbers in their firmware, while I guess Apple does not (or we 
would have seen this problem long ago).

-Hollis

2004-11-02  Hollis Blanchard  <address@hidden>

        * term/powerpc/ieee1275/ofconsole.c (grub_ofconsole_readkey): 
Test
        `actual' for negativity.

Index: term/powerpc/ieee1275/ofconsole.c
===================================================================
RCS file: /cvsroot/grub/grub2/term/powerpc/ieee1275/ofconsole.c,v
retrieving revision 1.4
diff -u -p -r1.4 ofconsole.c
--- term/powerpc/ieee1275/ofconsole.c   9 Oct 2004 02:37:18 -0000       
1.4
+++ term/powerpc/ieee1275/ofconsole.c   2 Nov 2004 06:46:26 -0000
@@ -124,10 +124,10 @@ grub_ofconsole_readkey (int *key)

   grub_ieee1275_read (stdin_ihandle, &c, 1, &actual);

-  if (actual && c == '\e')
+  if (actual > 0 && c == '\e')
     {
       grub_ieee1275_read (stdin_ihandle, &c, 1, &actual);
-      if (! actual)
+      if (actual <= 0)
        {
          *key = '\e';
          return 1;
@@ -137,7 +137,7 @@ grub_ofconsole_readkey (int *key)
        return 0;

       grub_ieee1275_read (stdin_ihandle, &c, 1, &actual);
-      if (! actual)
+      if (actual <= 0)
        return 0;

       switch (c)
@@ -162,7 +162,7 @@ grub_ofconsole_readkey (int *key)
     }

   *key = c;
-  return actual;
+  return actual > 0;
 }

 static int