44 lines
1.2 KiB
C
44 lines
1.2 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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/* 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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set_priv(rp, SYS_PROC);
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/* Now update the process' privileges as requested. */
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rp->p_priv->s_call_mask = SYSTEM_CALL_MASK;
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return(OK);
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}
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#endif /* USE_PRIVCTL */
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