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/* The kernel call that is implemented in this file:
* m_type: SYS_KILL
*
* The parameters for this kernel call are:
* m_sigcalls.endpt # process to signal/ pending
* m_sigcalls.sig # signal number to send to process
*/
#include "kernel/system.h"
#include <signal.h>
#if USE_KILL
/*===========================================================================*
* do_kill *
*===========================================================================*/
int do_kill(struct proc * caller, message * m_ptr)
{
/* Handle sys_kill(). Cause a signal to be sent to a process. Any request
* is added to the map of pending signals and the signal manager
* associated to the process is informed about the new signal. The signal
* is then delivered using POSIX signal handlers for user processes, or
* translated into an IPC message for system services.
*/
proc_nr_t proc_nr, proc_nr_e;
int sig_nr = m_ptr->m_sigcalls.sig;
proc_nr_e = (proc_nr_t)m_ptr->m_sigcalls.endpt;
if (!isokendpt(proc_nr_e, &proc_nr)) return(EINVAL);
if (sig_nr >= _NSIG) return(EINVAL);
if (iskerneln(proc_nr)) return(EPERM);
/* Set pending signal to be processed by the signal manager. */
cause_sig(proc_nr, sig_nr);
return(OK);
}
#endif /* USE_KILL */
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