LARTC - Jun 2005 - Segmentation fault

Hi,
I have a small question about tc''s source code. I m trying to compile
the code by itself, and for this purpose i ve created a big .c file
that includes all the sources it uses. the reason behind this  to make
a small modification for my school project.
But whenever I try to do "tc qdisc add ..." or "tc class
add..", it
gives the error segmentation fault, and it gives this error in this
code section of tc_qdisc_modify function:

if (q->parse_qopt(q, argc, argv, &req.n))

I could not find why this error has occured for 3 days. I would
appreciate, if you could help me or suggest something.

On Thu, 9 Jun 2005 22:49:49 +0300
Fatih Düzova <fduzova@gmail.com> wrote:
> Hi,
> I have a small question about tc''s source code. I m trying to
compile
> the code by itself, and for this purpose i ve created a big .c file
> that includes all the sources it uses. the reason behind this  to make
> a small modification for my school project.
> But whenever I try to do "tc qdisc add ..." or "tc class
add..", it
> gives the error segmentation fault, and it gives this error in this
> code section of tc_qdisc_modify function:
> 
> if (q->parse_qopt(q, argc, argv, &req.n))
> 
> I could not find why this error has occured for 3 days. I would
> appreciate, if you could help me or suggest something.
>
Perhaps you are getting by the way the 
tc command uses shared library hooks to allow for extension and late binding.
See dlopen(3) man page to understand this.


   dlopen
       The  function  dlopen()  loads  the  dynamic library file named by the
       null-terminated string filename and returns an opaque "handle"
for the
       dynamic library.


       If  filename  is  a  NULL pointer, then the returned handle is for the
       main program.  When given to dlsym(), this handle causes a search  for
       a  symbol in the main program, followed by all shared libraries loaded
       at program startup, and then all shared libraries loaded  by  dlopen()
       with the flag RTLD_GLOBAL.

Don''t see why you need everything in a single source file to be able to
make
a simple modification.