OK, I'll try this, thanks! I've another question: I have a module and an application program: Module: at init it initializes a timer register of the mpc823, such that an interrupt is generated every x milliseconds. Thus, I installed an interrupt handling function f that handles the timer interrupts. The problem is that the module / the interrupt handling function should execute a procedure defined in the application program. Is there a way to pass a pointer (which points to that function) from the appl.program to the module, such that the handler can execute this function every x milliseconds? I thought to create a procedure in the module that accepts a function pointer as argument. But how can I achieve, that this module procedure is visible to the application program? Regards, Juergen >Hi, > >You can create a proc >entry, or a device entry >through which you can register >the pid of the process to which >you want to send the signal. > >some thing like >/proc/reg_pid > >-------------------------------- >echo <your pid> > /proc/reg_pid >-------------------------------- > >In the kernel write a handler for >the proc entry which will store the pid >is some place, lets say a variable. > >And whenever necessary just >send the signal using the kill_proc >to this pid. > >Hope this helps >Regards >KK On Tue, 2003-11-25 at 23:44, Juergen Oberhofer wrote: > hm the thing is, that the module doesn't know the pid of the user process... > I would need a function, equivalent to the > int kill(pid_t pid, int sig); > function, defined in signal.h. Because by setting pid = -1 the signal is > sent to > every process except for process 1. > Does there exist such a function for the kernel space? If not, does somebody > know what other possibilities do I have? > regards > juergen > > > > hi, > > you can try > > kill_proc(pid,SIGUSR1,1); > > thx > > --rahul > > > > On Tue, 2003-11-25 at 19:18, Juergen Oberhofer wrote: > > > Hi, > > > is there a function to send a SIGUSR1 signal from a kernel module to a > > > program which > > > runs in user space? > > > Regards > > > Juergen > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
