1 /* The kernel call that is implemented in this file: 2 * m_type: SYS_KILL 3 * 4 * The parameters for this kernel call are: 5 * m_sigcalls.endpt # process to signal/ pending 6 * m_sigcalls.sig # signal number to send to process 7 */ 8 9 #include "kernel/system.h" 10 #include <signal.h> 11 12 #if USE_KILL 13 14 /*===========================================================================* 15 * do_kill * 16 *===========================================================================*/ 17 int do_kill(struct proc * caller, message * m_ptr) 18 { 19 /* Handle sys_kill(). Cause a signal to be sent to a process. Any request 20 * is added to the map of pending signals and the signal manager 21 * associated to the process is informed about the new signal. The signal 22 * is then delivered using POSIX signal handlers for user processes, or 23 * translated into an IPC message for system services. 24 */ 25 proc_nr_t proc_nr, proc_nr_e; 26 int sig_nr = m_ptr->m_sigcalls.sig; 27 28 proc_nr_e = (proc_nr_t)m_ptr->m_sigcalls.endpt; 29 30 if (!isokendpt(proc_nr_e, &proc_nr)) return(EINVAL); 31 if (sig_nr >= _NSIG) return(EINVAL); 32 if (iskerneln(proc_nr)) return(EPERM); 33 34 /* Set pending signal to be processed by the signal manager. */ 35 cause_sig(proc_nr, sig_nr); 36 37 return(OK); 38 } 39 40 #endif /* USE_KILL */ 41 42