Aziz KEZZOU wrote this message on Thu, Mar 17, 2005 at 14:55 -0500: > > Aziz KEZZOU wrote this message on Thu, Mar 17, 2005 at 12:34 -0500: > > > Hi all, > > > I would like to send a signal (e.g SIGUSR1) to a user process from > > > inside the kernel (kld module). > > > Can any one tell me how to do it ? > > > I tried the following code inspired from sys/kern/kern_sig.c : > > > ============================================================== > > > #include <sys/types.h> > > > #include <sys/signal.h> > > > > > > int process_pid; > > > struct kill_args { > > > int pid; > > > int signum; > > > }; > > > > > > void send_SIGUSR1() { > > > struct kill_args uap; > > > uap.pid = process_pid; > > > uap.signum = SIGUSR1; > > > kill((struct thread *)0, &uap); > > > } > > > =============================================================== > > > > > > but that causes a page fault in kernel mode (ie. Kernel panic :-) > > > > > > Any help is appreciated, thanks. > > > > Take a look at psignal(9)... You'll need to look up the struct proc > > for psignal with pfind(9)... and then PROC_UNLOCK the struct proc > > after you've used psignal... > > > > so: > > struct proc *p; > > > > p = pfind(pid); > > if (p != NULL) { > > psignal(p, SIGUSR1); > > PROC_UNLOCK(p); > > } > > > > I haven't tried the code above, but that should do what you want... > > It works, thanks a lot !! > Here are the headers needed in case someone reads this thread: > > #include <unistd.h> /*needed only for NULL, can be removed*/
This header (unistd.h) shouldn't be included in kernel code... > #include <sys/types.h> > #include <sys/param.h> style(9) says: Kernel include files (i.e. sys/*.h) come first; normally, include <sys/types.h> OR <sys/param.h>, but not both. It also looks like sys/param.h is suppose to define NULL since it includes _null.h (on -current) or defines it directly (on RELENG_4)... so you could should just include sys/param.h, and ditch sys/types.h and unistd.h and it should work... > #include <sys/lock.h> > #include <sys/mutex.h> > #include <sys/proc.h> -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not." _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"