kernel/system/do_setgrant.c

   1 /* The kernel call implemented in this file:
   2  *   m_type:    SYS_SETGRANT
   3  *
   4  * The parameters for this kernel call are:
   5  *      SG_ADDR address of grant table in own address space
   6  *      SG_SIZE number of entries
   7  */
   8
   9 #include "kernel/system.h"
  10 #include <minix/safecopies.h>
  11
  12 /*===========================================================================*
  13  *                              do_setgrant                                  *
  14  *===========================================================================*/
  15 int do_setgrant(struct proc * caller, message * m_ptr)
  16 {
  17         int r;
  18
  19         /* Copy grant table set in priv. struct. */
  20         if (RTS_ISSET(caller, RTS_NO_PRIV) || !(priv(caller))) {
  21                 r = EPERM;
  22         } else {
  23                 _K_SET_GRANT_TABLE(caller,
  24                         (vir_bytes) m_ptr->SG_ADDR,
  25                         m_ptr->SG_SIZE);
  26                 r = OK;
  27         }
  28
  29         return r;
  30 }