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