system calls

system calls

[Rodrigo Ramos]

Hi,


I would like to know how many groups of system calls are there at Linux
2.4 and 2.6? Where can I find these informations in the Kernel?


Best Regards,
Rodrigo Ramos
www.triforsec.com.br

Re: system calls

[Robert Love]

On Sat, 2005-01-29 at 10:53 -0300, Rodrigo Ramos wrote:

> I would like to know how many groups of system calls are there at Linux
> 2.4 and 2.6? Where can I find these informations in the Kernel?

I don't know what you mean by groups (a nonempty set G with binary
operation * s.t. G is associativity, there exists e in G s.t. e*a=a*e=a,
and there exists i in G s.t. i*b=b*i=e?).

System calls are implemented per-architecture.  You can see the list at
the bottom of arch/i386/kernel/entry.S.  There is about 290.

System calls are prefixed by "sys_".  Thus, read(2) is implemented in
the kernel as sys_read().  It, for example, can be found in
fs/read_write.c.

Hope this helps.

	Robert Love

Re: system calls

[Andries Brouwer]

On Sat, Jan 29, 2005 at 12:47:38PM -0500, Robert Love wrote:

> System calls are prefixed by "sys_".  Thus, read(2) is implemented in
> the kernel as sys_read().

Now that you say this - of course you know that the actual
situation is much more messy. Sometimes I wonder whether
it would be useful to make such a statement more true
and for example change sys_olduname, sys_uname, sys_newuname
into sys_oldolduname, sys_olduname, sys_uname.

Andries

Re: system calls

[Rodrigo Ramos]

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Hi Robert,

Thank you very much for your help. It really helped me.
When a say groups a mean classes like File Structure, Process Related
and etc. But I already got what I needed... Once again Thank you very
much.

Best Regards,
Rodrigo Ramos
http://www.triforsec.com.br

On Sat, 2005-01-29 at 14:47, Robert Love wrote:
> On Sat, 2005-01-29 at 10:53 -0300, Rodrigo Ramos wrote:
> 
> > I would like to know how many groups of system calls are there at Linux
> > 2.4 and 2.6? Where can I find these informations in the Kernel?
> 
> I don't know what you mean by groups (a nonempty set G with binary
> operation * s.t. G is associativity, there exists e in G s.t. e*a=a*e=a,
> and there exists i in G s.t. i*b=b*i=e?).
> 
> System calls are implemented per-architecture.  You can see the list at
> the bottom of arch/i386/kernel/entry.S.  There is about 290.
> 
> System calls are prefixed by "sys_".  Thus, read(2) is implemented in
> the kernel as sys_read().  It, for example, can be found in
> fs/read_write.c.
> 
> Hope this helps.
> 
> 	Robert Love
> 
> 
> 
> 

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