0946d128cd
- Moved generic_handler() from system.c to system/do_irqctl.c. - Set privileges of system processes somewhat stricter.
57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
/* The system call implemented in this file:
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* m_type: SYS_PRIVCTL
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*
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* The parameters for this system call are:
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* m2_i1: CTL_PROC_NR (process number of caller)
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*/
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#include "../system.h"
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#include "../ipc.h"
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#if USE_PRIVCTL
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/*===========================================================================*
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* do_privctl *
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*===========================================================================*/
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PUBLIC int do_privctl(m_ptr)
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message *m_ptr; /* pointer to request message */
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{
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/* Handle sys_privctl(). Update a process' privileges. If the process is not
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* yet a system process, make sure it gets its own privilege structure.
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*/
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register struct proc *rp;
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register struct priv *sp;
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int proc_nr;
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int i;
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/* Extract message parameters. */
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proc_nr = m_ptr->CTL_PROC_NR;
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if (proc_nr == SELF) proc_nr = m_ptr->m_source;
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if (! isokprocn(proc_nr)) return(EINVAL);
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rp = proc_addr(proc_nr);
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/* Make sure this process has its own privileges structure. */
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if (! (priv(rp)->s_flags & SYS_PROC))
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if ((i=get_priv(rp, SYS_PROC)) != OK) return(i);
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/* Now update the process' privileges as requested. */
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rp->p_priv->s_call_mask = FILLED_MASK;
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for (i=0; i<BITMAP_CHUNKS(NR_SYS_PROCS); i++) {
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rp->p_priv->s_send_mask.chunk[i] = FILLED_MASK;
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}
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unset_sys_bit(rp->p_priv->s_send_mask, USER_PRIV_ID);
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/* All process that this process can send to must be able to reply.
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* Therefore, their send masks should be updated as well.
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*/
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for (i=0; i<NR_SYS_PROCS; i++) {
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if (get_sys_bit(rp->p_priv->s_send_mask, i)) {
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set_sys_bit(priv_addr(i)->s_send_mask, priv_id(rp));
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}
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}
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return(OK);
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}
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#endif /* USE_PRIVCTL */
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