Hi !

I want to do a traffic counter in C for FreeBSD.
I have already done the daemon with forks but don't know where to get
the value of transfered data becayse these value isn't in '/proc'
(empty) or 'sysctl -a'

Any ideas ?

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Hi again.

I'm trying to do something with netstat but it's giving segmentation
fault (core dumped):


#include <stdio.h>
#include <unistd.h>

void recv()
{
#define LINE_LENGTH 500
char output_recv[LINE_LENGTH];
FILE *grab_recv;

/* exec netstat -s */

execl("/usr/bin/netstat -s -p tcp", "", grab_recv);

/* grab the result */

fgets(output_recv, LINE_LENGTH, grab_recv);
pclose(grab_recv);

/* print the result */

sprintf (output_recv, "Recebidos %s bytes ", output_recv);
puts(output_recv);
}

main ()
{
/* exec recv() to know received traffic */

recv();

}

/* EOF */


guilherme.oliveira@gmail.com escreveu:
> Hi !
>
> I want to do a traffic counter in C for FreeBSD.
> I have already done the daemon with forks but don't know where to get
> the value of transfered data becayse these value isn't in '/proc'
> (empty) or 'sysctl -a'
>
> Any ideas ?

[ Post a follow-up to this message ]

guilherme.oliveira@gmail.com wrote:
> Hi again.
>
> I'm trying to do something with netstat but it's giving segmentation
> fault (core dumped):
>
>
> #include <stdio.h>
> #include <unistd.h>
>
> void recv()
> {
> 	#define LINE_LENGTH 500
> 	char output_recv[LINE_LENGTH];
> 	FILE *grab_recv;
>
> 	/* exec netstat -s */
>
>                 execl("/usr/bin/netstat -s -p tcp", "", grab_recv);

You are confusing popen/system/exec**

>                 /* grab the result */

Your program does not exist any more.
Unless execl() failed.
In that case grab_recv will be uninitialised.
Either way you lose.

> 	fgets(output_recv, LINE_LENGTH, grab_recv);
> 	pclose(grab_recv);
>
> 	/* print the result */
>
> 	sprintf (output_recv, "Recebidos %s bytes ", output_recv);
> 	puts(output_recv);
> }
>
> main ()
> {
> 	/* exec recv() to know received traffic */
>
>                 recv();

recv() conflicts with a systemcall/library function.
Choose another name.
[vbcol=seagreen]
> }
>
> /* EOF */
>
>
> guilherme.oliveira@gmail.com escreveu:
> 

Don't toppost. Even when you are replying to yourself :-)

HTH,
AvK

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On 31 May 2006 02:42:09 -0700
guilherme.oliveira@gmail.com wrote:

> I want to do a traffic counter in C for FreeBSD.
> I have already done the daemon with forks but don't know where to get
> the value of transfered data becayse these value isn't in '/proc'
> (empty) or 'sysctl -a'

getifdata is your friend

--
Regards, Ed                      :: http://www.keyra.co.uk
proud bash hacker
:%s/Open Source/Free Software/g  :: Free DNS available

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