Re: [Bulk] grub2: commands/cmp.c: grub_cmd_cmp()

[Vincent Pelletier]

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Rodrigo Steinmüller Wanderley wrote:
> When reading the cmp commands I found some points I
> couldn't understand, think they are bugs, but maybe some of you guys can
> prove me wrong...

You are right :). Thanks for your bug report. Please tell me if this
patch is ok for you.
nb: I haven't tested these changes beyond "make", but I think they are
trivial enough to be trusted...

2005-06-29  Vincent Pelletier  <address@hidden>

    * commands/cmp.c
      (grub_cmd_cmp): Close the right file at the right time.
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Index: cmp.c
===================================================================
RCS file: /cvsroot/grub/grub2/commands/cmp.c,v
retrieving revision 1.2
diff -u -p -r1.2 cmp.c
--- cmp.c       4 Apr 2004 13:46:00 -0000       1.2
+++ cmp.c       29 Jun 2005 15:14:59 -0000
@@ -44,7 +44,7 @@ grub_cmd_cmp (struct grub_arg_list *stat
   file2 = grub_file_open (args[1]);
   if (! file2)
     {
-      grub_file_close (file2);
+      grub_file_close (file1);
       return grub_errno;
     }
 
@@ -67,7 +67,7 @@ grub_cmd_cmp (struct grub_arg_list *stat
          rd2 = grub_file_read (file2, buf2, 512);
 
          if (rd1 != rd2)
-           return 0;
+           goto cleanup;
 
          for (i = 0; i < 512; i++)
            {
@@ -76,10 +76,7 @@ grub_cmd_cmp (struct grub_arg_list *stat
                  grub_printf ("Differ at the offset %d: 0x%x [%s], 0x%x 
[%s]\n",
                               i + pos, buf1[i], args[0],
                               buf2[i], args[1]);
-
-                 grub_file_close (file1);
-                 grub_file_close (file2);
-                 return 0;
+                 goto cleanup;
                }
            }
          pos += 512;
@@ -87,11 +84,12 @@ grub_cmd_cmp (struct grub_arg_list *stat
        } while (rd2);
     }
 
+  grub_printf ("The files are identical.\n");
+
+cleanup:
   grub_file_close (file1);
   grub_file_close (file2);
 
-  grub_printf ("The files are identical.\n");
-
   return 0;
 }