*** empty log message ***

diff --git a/kernel/system/do_privctl.c b/kernel/system/do_privctl.c
new file mode 100644 (file)
index 0000000..cad78ad
--- /dev/null
+++ b/kernel/system/do_privctl.c
@@ -0,0 +1,43 @@
+/* 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 */
+