Re: running "pmap" on a short-lived process?

["Nikolay N. Ivanov" <nn@xxxxxxxx>]

Hi, Robert!

You may also use zombie status. Just implement a small new program:

#include <unistd.h>
#include <stdlib.h>

int main (void)
{
        if (!fork()) {
                execl ("./main", "main", NULL);
        }

        sleep (50);
        return 0;
}

Your process will be "zombie" for 50 seconds. And during this time you may
obtain any information about this process in /proc filesystem.

Good luck!


On Сбт, Фев 03, 2007 at 04:11:18 -0500, Robert P. J. Day wrote:
> 
>   perhaps i'm missing the point here but, for those of you who have a
> copy of robert love's kernel book, on p. 260, he demonstrates the use
> of "pmap" to examine a process' address space.  but he does it on a
> trivial example:
> 
> int main()
> [
> 	return 0;
> }
> 
>   he then runs the command:
> 
>   $ cat /proc/1426/maps
> 
> where 1426 is apparently the PID of the sample process.  but how is it
> that he can check that process when it would run and finish almost
> immediately?  or am i misreading something?
> 
> rday
> 
> -- 
> ========================================================================
> Robert P. J. Day
> Linux Consulting, Training and Annoying Kernel Pedantry
> Waterloo, Ontario, CANADA
> 
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> 
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-- 
Nikolay N. Ivanov

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