[Freedos-cvs] SF.net SVN: freedos:[1609] kernel/trunk/kernel/fatfs.c

[<bar...@us...>]

Revision: 1609
          http://freedos.svn.sourceforge.net/freedos/?rev=1609&view=rev
Author:   bartoldeman
Date:     2011-05-09 01:54:48 +0000 (Mon, 09 May 2011)

Log Message:
-----------
Truncating a 0-byte file should not fail!

Modified Paths:
--------------
    kernel/trunk/kernel/fatfs.c

Modified: kernel/trunk/kernel/fatfs.c
===================================================================
--- kernel/trunk/kernel/fatfs.c	2011-05-09 01:50:03 UTC (rev 1608)
+++ kernel/trunk/kernel/fatfs.c	2011-05-09 01:54:48 UTC (rev 1609)
@@ -1792,10 +1792,11 @@
   struct dpb FAR *dpbp = fnp->f_dpb;
   int ret = DE_ACCESS;
 
-  fnp->f_offset = fnp->f_dir.dir_size;     /* end of file */
-
   if (fnp->f_offset)
     fnp->f_offset--;            /* last existing cluster */
+  else if (fnp->f_cluster == FREE)
+    /* zero offset, 0-byte file: nothing to do ! */
+    goto done_success;
 
   if (map_cluster(fnp, XFR_READ) != SUCCESS)    /* error, don't truncate */
     goto done;


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