Init(8) will halt the system if sent USR1 signal,

or halt and turn the power off if sent SIGUSR2.

PR:		5451
Submitted by:	Leif Neland <leifn@image.dk>
Reworked by:	ru
Reviewed by:	-hackers

2 files changed, 23 insertions, 8 deletions

diff --git a/sbin/init/init.8 b/sbin/init/init.8
index 38d46ac..54e1f0d 100644
--- a/sbin/init/init.8
+++ b/sbin/init/init.8
@@ -33,7 +33,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     @(#)init.8	8.3 (Berkeley) 4/18/94
-.\"	$Id: init.8,v 1.12 1998/07/06 06:56:07 charnier Exp $
+.\"	$Id: init.8,v 1.13 1998/12/16 16:50:12 ghelmer Exp $
 .\"
 .Dd April 18, 1994
 .Dt INIT 8
@@ -252,6 +252,14 @@ signal, i.e.
 This is useful for shutting the machine down cleanly from inside the kernel
 or from X when the machine appears to be hung.
 .Pp
+.Nm Init
+will do the same, except it will shutdown the machine if sent
+the user defined signal 1
+.Pq Dv USR1 ,
+or will shutdown and turn the power off (if hardware permits) if sent
+the user defined signal 2
+.Pq Dv USR2 .
+.Pp
 When shutting down the machine,
 .Nm
 will try to run the
@@ -286,7 +294,7 @@ that is stuck in a device driver because of
 a persistent device error condition.
 .El
 .Sh FILES
-.Bl -tag -width /var/log/wtmp -compact
+.Bl -tag -width /etc/rc.shutdown -compact
 .It Pa /dev/console
 system console device
 .It Pa /dev/tty*
@@ -318,7 +326,7 @@ system shutdown commands
 .Xr shutdown 8 ,
 .Xr sysctl 8
 .Sh HISTORY
-A
+An
 .Nm
 command appeared in
 .At v6 .
diff --git a/sbin/init/init.c b/sbin/init/init.c
index 6ed059f..f1cacd8 100644
--- a/sbin/init/init.c
+++ b/sbin/init/init.c
@@ -45,7 +45,7 @@ static const char copyright[] =
 static char sccsid[] = "@(#)init.c	8.1 (Berkeley) 7/15/93";
 #endif
 static const char rcsid[] =
-	"$Id: init.c,v 1.30 1998/07/06 06:56:08 charnier Exp $";
+	"$Id: init.c,v 1.31 1998/07/22 05:45:11 phk Exp $";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -132,6 +132,7 @@ enum { AUTOBOOT, FASTBOOT } runcom_mode = AUTOBOOT;
 #define TRUE	1
 
 int Reboot = FALSE;
+int howto = RB_AUTOBOOT;
 
 int devfs;
 
@@ -259,11 +260,13 @@ main(argc, argv)
 	handle(badsys, SIGSYS, 0);
 	handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV,
 	       SIGBUS, SIGXCPU, SIGXFSZ, 0);
-	handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, 0);
+	handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP,
+		SIGUSR1, SIGUSR2, 0);
 	handle(alrm_handler, SIGALRM, 0);
 	sigfillset(&mask);
 	delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS,
-		SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, 0);
+		SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, 
+		SIGUSR1, SIGUSR2, 0);
 	sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0);
 	sigemptyset(&sa.sa_mask);
 	sa.sa_flags = 0;
@@ -594,11 +597,11 @@ single_user()
 		setsecuritylevel(0);
 
 	if (Reboot) {
-		/* Instead of going single user, let's halt the machine */
+		/* Instead of going single user, let's reboot the machine */
 		sync();
 		alarm(2);
 		pause();
-		reboot(RB_AUTOBOOT);
+		reboot(howto);
 		_exit(0);
 	}
 
@@ -1238,6 +1241,10 @@ transition_handler(sig)
 	case SIGHUP:
 		requested_transition = clean_ttys;
 		break;
+	case SIGUSR2:
+		howto = RB_POWEROFF;
+	case SIGUSR1:
+		howto |= RB_HALT;
 	case SIGINT:
 		Reboot = TRUE;
 	case SIGTERM: