big <utmp.h>-inspired netbsd switch

import/switch of:
init, getty, reboot, halt, shutdown, wall, last

changes:
	. change reboot() call to netbsd prototype and args
	. allows pristine <utmp.h>
	. use clean <sys/reboot.h> instead of <minix/reboot.h>
	. implement TIOCSCTTY for use by getty so getty can get
	  controlling terminal from init's child(ren)
	. allow NULL envp for exec

Change-Id: I5ca02cb4230857140c08794bbfeba7df982c58a3

kernel/arch/earm/arch_reset.c

@@ -9,8 +9,9 @@
 #include <machine/vm.h>
 #include <io.h>
 
-#include <minix/reboot.h>
 #include <minix/board.h>
+#include <sys/reboot.h>
+
 #include <minix/u64.h>
 
 #include "archconst.h"
@@ -51,25 +52,23 @@ poweroff(void)
 __dead void
 arch_shutdown(int how)
 {
-	switch (how) {
-	case RBT_HALT:
-		/* Hang */
-		for (; ; ) halt_cpu();
-		NOT_REACHABLE;
 
-	case RBT_POWEROFF:
+	if((how & RB_POWERDOWN) == RB_POWERDOWN) {
 		/* Power off if possible, hang otherwise */
 		poweroff();
 		NOT_REACHABLE;
+	}
 
-	default:
-	case RBT_DEFAULT:
-	case RBT_REBOOT:
-	case RBT_RESET:
-		/* Reset the system */
-		reset();
+	if(how & RB_HALT) {
+		/* Hang */
+		for (; ; ) halt_cpu();
 		NOT_REACHABLE;
 	}
+
+	/* Reset the system */
+	reset();
+	NOT_REACHABLE;
+
 	while (1);
 }
 

kernel/arch/earm/pre_init.c

@@ -10,7 +10,7 @@
 #include <minix/com.h>
 #include <sys/types.h>
 #include <sys/param.h>
-#include <minix/reboot.h>
+#include <sys/reboot.h>
 #include "string.h"
 #include "arch_proto.h"
 #include "direct_utils.h"
@@ -412,7 +412,7 @@ kinfo_t *pre_init(int argc, char **argv)
  * longer used and the "real" implementations are visible
  */
 void send_diag_sig(void) { }
-void minix_shutdown(minix_timer_t *t) { arch_shutdown(RBT_PANIC); }
+void minix_shutdown(minix_timer_t *t) { arch_shutdown(0); }
 void busy_delay_ms(int x) { }
 int raise(int n) { panic("raise(%d)\n", n); }
 int kern_phys_map_ptr( phys_bytes base_address, vir_bytes io_size, 

kernel/arch/i386/arch_reset.c

@@ -8,7 +8,7 @@
 #include <machine/cpu.h>
 #include <minix/portio.h>
 #include <minix/cpufeature.h>
-#include <minix/reboot.h>
+#include <sys/reboot.h>
 #include <assert.h>
 #include <signal.h>
 #include <machine/vm.h>
@@ -134,30 +134,24 @@ __dead void arch_shutdown(int how)
 			;
 		reset();
 	}
-
-	switch (how) {
-		case RBT_HALT:
-			/* Hang */
-			for (; ; ) halt_cpu();
-			NOT_REACHABLE;
-			
-		case RBT_POWEROFF:
-			/* Power off if possible, hang otherwise */
-			poweroff();
-			NOT_REACHABLE;
-
-		default:
-		case RBT_DEFAULT:	
-		case RBT_REBOOT:
-		case RBT_RESET:
-			/* Reset the system by forcing a processor shutdown. 
-			 * First stop the BIOS memory test by setting a soft
-			 * reset flag.
-			 */
-			reset();
-			NOT_REACHABLE;
+		
+	if((how & RB_POWERDOWN) == RB_POWERDOWN) {
+		/* Power off if possible, hang otherwise */
+		poweroff();
+		NOT_REACHABLE;
 	}
 
+	if(how & RB_HALT) {
+		/* Hang */
+		for (; ; ) halt_cpu();
+		NOT_REACHABLE;
+	}
+
+	/* Reset the system by forcing a processor shutdown. 
+	 * First stop the BIOS memory test by setting a soft
+	 * reset flag.
+	 */
+	reset();
 	NOT_REACHABLE;
 }
 

kernel/arch/i386/pre_init.c

@@ -11,7 +11,7 @@
 #include <minix/com.h>
 #include <sys/types.h>
 #include <sys/param.h>
-#include <minix/reboot.h>
+#include <sys/reboot.h>
 #include <machine/partition.h>
 #include "string.h"
 #include "arch_proto.h"
@@ -246,6 +246,6 @@ kinfo_t *pre_init(u32_t magic, u32_t ebx)
 }
 
 void send_diag_sig(void) { }
-void minix_shutdown(minix_timer_t *t) { arch_shutdown(RBT_PANIC); }
+void minix_shutdown(minix_timer_t *t) { arch_shutdown(0); }
 void busy_delay_ms(int x) { }
 int raise(int sig) { panic("raise(%d)\n", sig); }

kernel/main.c

@@ -18,7 +18,7 @@
 #include <minix/u64.h>
 #include <minix/board.h>
 #include <minix/type.h>
-#include <minix/reboot.h>
+#include <sys/reboot.h>
 #include "clock.h"
 #include "direct_utils.h"
 #include "hw_intr.h"
@@ -357,8 +357,7 @@ void prepare_shutdown(const int how)
 void minix_shutdown(minix_timer_t *tp)
 {
 /* This function is called from prepare_shutdown or stop_sequence to bring 
- * down MINIX. How to shutdown is in the argument: RBT_HALT (return to the
- * monitor), RBT_RESET (hard reset). 
+ * down MINIX.
  */
   int how;
 
@@ -376,25 +375,17 @@ void minix_shutdown(minix_timer_t *tp)
   hw_intr_disable_all();
   stop_local_timer();
 
-  how = tp ? tmr_arg(tp)->ta_int : RBT_PANIC;
+  how = tp ? tmr_arg(tp)->ta_int : 0;
 
   /* Show shutdown message */
   direct_cls();
-  switch(how) {
-  case RBT_HALT:
+  if((how & RB_POWERDOWN) == RB_POWERDOWN)
+	direct_print("MINIX has halted and will now power off.\n");
+  else if(how & RB_HALT)
 	direct_print("MINIX has halted. "
 		     "It is safe to turn off your computer.\n");
-	break;
-  case RBT_POWEROFF:
-	direct_print("MINIX has halted and will now power off.\n");
-	break;
-  case RBT_DEFAULT:
-  case RBT_REBOOT:
-  case RBT_RESET:
-  default:
+  else
 	direct_print("MINIX will now reset.\n");
-	break;
-  }
   arch_shutdown(how);
 }