>From man page of GNU tar,
> --exclude pattern       Exclude files matching the pattern (don't extract
>                         them, don't add them, don't list them).
>I think this option is useful, and here is my attempt to add --exclude
>to our tar.
>Thanks in advance for comments.

	you are using
		p = realloc(p, x)
	which is a source of memory leak when memory allocation fails.
	see realloc(3) manpage.

itojun