wait for childs of a child process

Hello,

I have to monitor applications on a system (users who run the application, how long, etc.), but I'm having troubles with applications which fork during startup (openoffice for instance).

Here is a snippet of what I planned to use (checks omitted to simplify):

####################################
#include <stdio.h>
#include <sys/wait.h>
#include <sys/types.h>

int main()

{
    int status;
    pid_t p = fork();
    if (p == 0)
        system ("soffice");
    else if (p > 0)
    {
        waitpid (p, &status, 0);
        printf ("done\n");
    }

    return 0;
}

####################################

Is there a way to make wait() or an other syscall monitor the process' children, or is patching openoffice (and other apps behaving in the same way) the only solution?

Thanks,
Gauvain Pocentek

Are you sure that the process accounting on Linux doesn't cover your needs and you need a custom solution?

 Michael Iatrou (brzh)

Well I wasn't aware that such tool existed. It will probably help to use this instead of reinventing the wheel.

Thanks to you and ben (who had the same idea).

Gauvain

NB: sorry for the typo in the subject.

Would not be simpler to use Unix's pacct feature ? It may not be enabled, though, on some linux distro.

- ben
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