do_iopenable.c

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

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FreeBSD/Linux Kernel Cross Reference sys/kernel/system/do_iopenable.c

FreeBSD/Linux Kernel Cross Reference
sys/kernel/system/do_iopenable.c