trying to send signal from linux module

andreiij · 05-02-2005, 12:38 PM

Hi!
I have a kernel (linux 2.6.11.7) module.
I want this module, upon recieving an interrupt, to send a signal to a user process. How do i do that?
The module recives the pid of the user process via its proc file.
This dosent seem to work, any other ideas?

my_interrupt_handler() {

struct task_struct *p;
p = find_task_by_pid(pid_of_client);
force_sig(SIGUSR1, p);
}

the int pid_of_client is correct..

thanks!
/andy

andreiij · 05-02-2005, 12:46 PM

Ok... I found answer to my own question..

had to use get_task_struct(struct task_struct) also.. the code now looks like

p = find_task_by_pid(pid_of_client);
if (p)
{
get_task_struct(p);
force_sig(SIGUSR1, p);
}

Thanks anyway!
/andy