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| 1 | /* The system call implemented in this file:
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| 2 | * m_type: SYS_IOPENABLE
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| 3 | *
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| 4 | * The parameters for this system call are:
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| 5 | * m2_i2: IO_ENDPT (process to give I/O Protection Level bits)
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| 6 | *
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| 7 | * Author:
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| 8 | * Jorrit N. Herder <jnherder@cs.vu.nl>
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| 9 | */
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| 10 |
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| 11 | #include "../system.h"
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| 12 | #include "../kernel.h"
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| 13 |
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| 14 | /*===========================================================================*
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| 15 | * do_iopenable *
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| 16 | *===========================================================================*/
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| 17 | PUBLIC int do_iopenable(m_ptr)
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| 18 | register message *m_ptr; /* pointer to request message */
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| 19 | {
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| 20 | int proc_nr;
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| 21 |
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| 22 | #if 1 /* ENABLE_USERPRIV && ENABLE_USERIOPL */
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| 23 | if (m_ptr->IO_ENDPT == SELF) {
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| 24 | proc_nr = who_p;
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| 25 | } else if(!isokendpt(m_ptr->IO_ENDPT, &proc_nr))
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| 26 | return(EINVAL);
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| 27 | enable_iop(proc_addr(proc_nr));
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| 28 | return(OK);
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| 29 | #else
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| 30 | return(EPERM);
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| 31 | #endif
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| 32 | }
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| 33 |
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| 34 |
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