36 lines
952 B
C
36 lines
952 B
C
/* The system call implemented in this file:
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* m_type: SYS_IOPENABLE
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*
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* The parameters for this system call are:
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* m_lsys_krn_sys_iopenable.endpt (process to give I/O Protection Level bits)
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*
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* Author:
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* Jorrit N. Herder <jnherder@cs.vu.nl>
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*/
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#include "kernel/system.h"
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#include "kernel/kernel.h"
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#include <minix/endpoint.h>
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#include "arch_proto.h"
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/*===========================================================================*
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* do_iopenable *
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*===========================================================================*/
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int do_iopenable(struct proc * caller, message * m_ptr)
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{
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int proc_nr;
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#if 1 /* ENABLE_USERPRIV && ENABLE_USERIOPL */
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if (m_ptr->m_lsys_krn_sys_iopenable.endpt == SELF) {
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okendpt(caller->p_endpoint, &proc_nr);
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} else if(!isokendpt(m_ptr->m_lsys_krn_sys_iopenable.endpt, &proc_nr))
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return(EINVAL);
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enable_iop(proc_addr(proc_nr));
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return(OK);
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#else
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return(EPERM);
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#endif
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}
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