From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Fri, 26 Feb 2016 11:26:56 +0000 (+0100)
Subject: cat: Don't switch terminal mode when there is nothing to highlight.
X-Git-Tag: 2.02-beta3~12
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8c26dace6f4db4245b57f05257c07b1253eb7490;p=thirdparty%2Fgrub.git

cat: Don't switch terminal mode when there is nothing to highlight.

This just pollutes serial console.
---

diff --git a/grub-core/commands/cat.c b/grub-core/commands/cat.c
index 8a7f1af78..88d904436 100644
--- a/grub-core/commands/cat.c
+++ b/grub-core/commands/cat.c
@@ -140,10 +140,13 @@ grub_cmd_cat (grub_extcmd_context_t ctxt, int argc, char **args)
       grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
     }
 
-  grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT);
-  for (j = 0; j < utcount; j++)
-    grub_printf ("<%x>", (unsigned int) utbuf[j]);
-  grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
+  if (utcount)
+    {
+      grub_setcolorstate (GRUB_TERM_COLOR_HIGHLIGHT);
+      for (j = 0; j < utcount; j++)
+	grub_printf ("<%x>", (unsigned int) utbuf[j]);
+      grub_setcolorstate (GRUB_TERM_COLOR_STANDARD);
+    }
 
   grub_xputs ("\n");
   grub_refresh ();