Minor cleanups to shutdown(8):

- Make the -k "don't actually halt" flag incompatible with
  the halt/reboot options -h, -p, and -r.
- The -n "don't sync" option is ignored if -k is specified.
  Issue a warning message.
- Compute the actual shutdown time written to /var/run/nologin
  correctly in the case of "now" being specified.

sbin/shutdown/shutdown.8

@@ -30,7 +30,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     @(#)shutdown.8	8.2 (Berkeley) 4/27/95
-.\"	$Id: shutdown.8,v 1.8 1998/12/11 10:35:38 bde Exp $
+.\"	$Id: shutdown.8,v 1.9 1999/01/11 09:07:42 asami Exp $
 .\"
 .Dd Dec 11, 1998
 .Dt SHUTDOWN 8
@@ -71,6 +71,9 @@ system multi-user with logins disabled (for all but super-user).
 Prevent the normal
 .Xr sync 2
 before stopping.
+This option is ignored if
+.Fl k
+is specified.
 .It Fl p
 The system will turn the power off after shutdown if it can.
 .It Fl r 
@@ -105,6 +108,14 @@ is supplied as an option, the warning message is read from the standard
 input.
 .El
 .Pp
+Only one of 
+.Fl h ,
+.Fl k ,
+.Fl p ,
+and
+.Fl r
+can be specified at a time.
+.Pp
 At intervals, becoming more frequent as apocalypse approaches
 and starting at ten hours before shutdown, warning messages are displayed
 on the terminals of all users logged in.  Five minutes before

sbin/shutdown/shutdown.c

@@ -42,7 +42,7 @@ static const char copyright[] =
 static char sccsid[] = "@(#)shutdown.c	8.4 (Berkeley) 4/28/95";
 #endif
 static const char rcsid[] =
-	"$Id: shutdown.c,v 1.16 1998/12/11 11:21:47 bde Exp $";
+	"$Id: shutdown.c,v 1.17 1999/06/18 14:26:07 ru Exp $";
 #endif /* not lint */
 
 #include <sys/param.h>
@@ -151,10 +151,14 @@ main(argc, argv)
 	if (argc < 1)
 		usage();
 
-	if (doreboot + dohalt + dopower > 1) {
-		warnx("incompatible switches -h, -p and -r");
+	if (killflg + doreboot + dohalt + dopower > 1) {
+		warnx("incompatible switches -h, -k, -p and -r");
 		usage();
 	}
+
+	if (killflg && nosync)
+		warnx("option -n ignored with -k");
+
 	getoffset(*argv++);
 
 	if (*argv) {
@@ -383,12 +387,14 @@ getoffset(timearg)
 	time_t now;
 	int this_year;
 
+	(void)time(&now);
+
 	if (!strcasecmp(timearg, "now")) {		/* now */
 		offset = 0;
+		shuttime = now;
 		return;
 	}
 
-	(void)time(&now);
 	if (*timearg == '+') {				/* +minutes */
 		if (!isdigit(*++timearg))
 			badtime();