minix/kernel/system/do_privctl.c
2005-07-22 09:20:43 +00:00

43 lines
1.2 KiB
C

/* The system call implemented in this file:
* m_type: SYS_PRIVCTL
*
* The parameters for this system call are:
* m2_i1: CTL_PROC_NR (process number of caller)
*/
#include "../system.h"
#include "../ipc.h"
#if USE_PRIVCTL
/*===========================================================================*
* do_privctl *
*===========================================================================*/
PUBLIC int do_privctl(m_ptr)
message *m_ptr; /* pointer to request message */
{
/* Handle sys_privctl(). Update a process' privileges. If the process is not
* yet a system process, make sure it gets its own privilege structure.
*/
register struct proc *rp;
register struct priv *sp;
int proc_nr;
/* Extract message parameters. */
proc_nr = m_ptr->CTL_PROC_NR;
if (proc_nr == SELF) proc_nr = m_ptr->m_source;
if (! isokprocn(proc_nr)) return(EINVAL);
rp = proc_addr(proc_nr);
/* Make sure this process has its own privileges structure. */
if (! (priv(rp)->s_flags & SYS_PROC))
set_priv(rp, SYS_PROC);
/* Now update the process' privileges as requested. */
rp->p_priv->s_call_mask = SYSTEM_CALL_MASK;
return(OK);
}
#endif /* USE_PRIVCTL */