Dylibs

Dylibs

[raja]

Hi,
     While loading Dylibs i want to write my own __init,__fini 
functions.Would you please tell me how to write those functions please.

Raja

Re: Dylibs

[Markus Rechberger]

Hello Raja,

there is an article about it on neworder.box.sk, it also covers a few
other topics.
http://neworder.box.sk/newsread.php?newsid=13727

Markus

On 8/13/05, raja <vnagaraju@effigent.net> wrote:
> Hi,
>      While loading Dylibs i want to write my own __init,__fini
> functions.Would you please tell me how to write those functions please.
> 
> Raja
> -
> To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 


-- 
Markus Rechberger

http://www.wikiservice.at/dse/wiki.cgi?MarkusRechberger

Re: Dylibs

[r_zaca]

[-- Attachment #1: Mail message body --]
[-- Type: text/plain, Size: 667 bytes --]

  Hello, 

  These are construction of code that you can use before the return of 
dlopen and after dlclose. For example: 

void _init () 
{ 
   printf ("init print.\n"); 
} 

void _fini () 
{ 
   printf ("fini print.\n"); 
} 

  The code in _init function will be run before the return of dlopen to your 
program and the code in _fini will be run before the return of dlopen to 
your program. You just have to put the code you actually need inside these 
functions. 

  I hope it can help you. 
  Good Luck. 

>Hi, 
>     While loading Dylibs i want to write my own __init,__fini 
>functions.Would you please tell me how to write those functions >please. 
> 
>Raja 

Re: Dylibs

[Steve Graegert]

On 8/15/05, r_zaca <r_zaca@ig.com.br> wrote:
>  Hello,

[snipped some code]

The use of _init() and _fini() is strongly discouraged.  Both are
obsolete and their use can lead to some strange behaviour.  Some even
consider them as dangerous.

Instead, you should rely on function attribute constructors and destructors:

        void __attribute__ ((constructor)) my_init(void);
        void __attribute__ ((destructor)) my_fini(void);

Please note: when compiling shared libs with gcc, you _must_ omit the
arguments -nostartfiles or -nostdlib, otherwise the declared routines
will not be executed.

Regards

        \Steve


> 
> >Hi,
> >     While loading Dylibs i want to write my own __init,__fini
> >functions.Would you please tell me how to write those functions >please.
> >
> >Raja
> 
> 

Steve Graegert <graegerts@gmail.com>
Software Consultancy {C/C++ && Java && .NET}
Mobile: +49 (176)  21248869
Office: +49 (9131) 7126409