/*----------------------------------------------------------------------
      Rename a file

  Args: tmpfname -- Old name of file
        fname    -- New name of file
 
 Result: File is renamed.  Returns 0 on success, else -1 on error
	 and errno is valid.
  ----*/
rename_file(tmpfname, fname)
    char *tmpfname, *fname;
{
    int ret;

    /*
     * DOS rename doesn't unlink destination for us...
     */
    if((ret = unlink(fname)) && (errno == EPERM)){
	dprint(1, (debugfile, "rename_file: unlink(%s) failed: %s\n",
	       fname, error_description(errno)));
	dprint(1, (debugfile, "  :%s may be in use by another pine\n",
	       fname));
	ret = -5;
    }
    else if(ret = rename(tmpfname, fname)){
	dprint(1, (debugfile, "rename_file: rename(%s,%s) failed: %s\n",
	       tmpfname, fname, error_description(errno)));
    }

    return(ret);
}