42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
/* The kernel call that is implemented in this file:
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* m_type: SYS_ENDKSIG
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*
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* The parameters for this kernel call are:
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* m_sigcalls.endpt # process for which PM is done
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*/
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#include "kernel/system.h"
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#if USE_ENDKSIG
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/*===========================================================================*
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* do_endksig *
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*===========================================================================*/
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int do_endksig(struct proc * caller, message * m_ptr)
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{
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/* Finish up after a kernel type signal, caused by a SYS_KILL message or a
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* call to cause_sig by a task. This is called by a signal manager after
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* processing a signal it got with SYS_GETKSIG.
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*/
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register struct proc *rp;
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int proc_nr;
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/* Get process pointer and verify that it had signals pending. If the
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* process is already dead its flags will be reset.
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*/
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if(!isokendpt(m_ptr->m_sigcalls.endpt, &proc_nr))
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return EINVAL;
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rp = proc_addr(proc_nr);
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if (caller->p_endpoint != priv(rp)->s_sig_mgr) return(EPERM);
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if (!RTS_ISSET(rp, RTS_SIG_PENDING)) return(EINVAL);
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/* The signal manager has finished one kernel signal. Is the process ready? */
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if (!RTS_ISSET(rp, RTS_SIGNALED)) /* new signal arrived */
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RTS_UNSET(rp, RTS_SIG_PENDING); /* remove pending flag */
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return(OK);
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}
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#endif /* USE_ENDKSIG */
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