From ae9c706359d21fc23e9260b0a98afe083681c29b Mon Sep 17 00:00:00 2001
From: naddy <naddy@openbsd.org>
Date: Wed, 21 Jan 2015 19:38:53 +0000
Subject: [PATCH] Build the argument list for halt/reboot without excessive use
 of the conditional operator.  Adapted from NetBSD.  ok miod@

---
 sbin/shutdown/shutdown.c | 39 ++++++++++++++++++++++++---------------
 1 file changed, 24 insertions(+), 15 deletions(-)

diff --git a/sbin/shutdown/shutdown.c b/sbin/shutdown/shutdown.c
index af6b4c7b22e..31e814ffb4a 100644
--- a/sbin/shutdown/shutdown.c
+++ b/sbin/shutdown/shutdown.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: shutdown.c,v 1.39 2015/01/21 19:29:52 naddy Exp $	*/
+/*	$OpenBSD: shutdown.c,v 1.40 2015/01/21 19:38:53 naddy Exp $	*/
 /*	$NetBSD: shutdown.c,v 1.9 1995/03/18 15:01:09 cgd Exp $	*/
 
 /*
@@ -359,20 +359,29 @@ die_you_gravy_sucking_pig_dog(void)
 		(void)printf(" with dump");
 	(void)printf("\nkill -HUP 1\n");
 #else
-	if (doreboot) {
-		execle(_PATH_REBOOT, "reboot", "-l",
-		    (nosync ? "-n" : (dodump ? "-d" : NULL)),
-		    (dodump ? "-d" : NULL), (char *)NULL, (char *)NULL);
-		syslog(LOG_ERR, "shutdown: can't exec %s: %m.", _PATH_REBOOT);
-		warn(_PATH_REBOOT);
-	}
-	else if (dohalt || dopower) {
-		execle(_PATH_HALT, "halt", "-l",
-		    (dopower ? "-p" : (nosync ? "-n" : (dodump ? "-d" : NULL))),
-		    (nosync ? "-n" : (dodump ? "-d" : NULL)),
-		    (dodump ? "-d" : NULL), (char *)NULL, (char *)NULL);
-		syslog(LOG_ERR, "shutdown: can't exec %s: %m.", _PATH_HALT);
-		warn(_PATH_HALT);
+	if (dohalt || dopower || doreboot) {
+		char *args[10];
+		char **arg, *path;
+
+		arg = &args[0];
+		if (doreboot) {
+			path = _PATH_REBOOT;
+			*arg++ = "reboot";
+		} else {
+			path = _PATH_HALT;
+			*arg++ = "halt";
+		}
+		*arg++ = "-l";
+		if (dopower)
+			*arg++ = "-p";
+		if (nosync)
+			*arg++ = "-n";
+		if (dodump)
+			*arg++ = "-d";
+		*arg++ = NULL;
+		execve(path, args, NULL);
+		syslog(LOG_ERR, "shutdown: can't exec %s: %m.", path);
+		warn(path);
 	}
 	if (access(_PATH_RC, R_OK) != -1) {
 		pid_t pid;
-- 
2.20.1