minix/kernel/system/do_setgrant.c
2010-04-01 22:22:33 +00:00

30 lines
763 B
C

/* The kernel call implemented in this file:
* m_type: SYS_SETGRANT
*
* The parameters for this kernel call are:
* SG_ADDR address of grant table in own address space
* SG_SIZE number of entries
*/
#include "kernel/system.h"
#include <minix/safecopies.h>
/*===========================================================================*
* do_setgrant *
*===========================================================================*/
PUBLIC int do_setgrant(struct proc * caller, message * m_ptr)
{
int r;
/* Copy grant table set in priv. struct. */
if (RTS_ISSET(caller, RTS_NO_PRIV) || !(priv(caller))) {
r = EPERM;
} else {
_K_SET_GRANT_TABLE(caller,
(vir_bytes) m_ptr->SG_ADDR,
m_ptr->SG_SIZE);
r = OK;
}
return r;
}