From b7aa1f2c80332cad4c6d156726ab56591cf1ee12 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pj@pehjota.net>
Date: Tue, 26 May 2015 17:59:50 -0400
Subject: cmd/installer-pc: Require non-null -a and -p opt args

Previously, something like the following would work:

    # prokit installer-pc -a '' -p '' dev/trunk /dev/sdb
---
diff --git a/lib/cmd/installer-pc.sh b/lib/cmd/installer-pc.sh
index 7a12e1a..69381d0 100644
--- a/lib/cmd/installer-pc.sh
+++ b/lib/cmd/installer-pc.sh
@@ -43,11 +43,11 @@ cmd_installer_pc_main()
 	fi
 	shift $(($OPTIND - 1))
 
-	if [ "x${cmd_installer_pc_opt_a+set}" != 'xset' ]; then
+	if [ "x${cmd_installer_pc_opt_a-}" = 'x' ]; then
 		print_cmd_usage 'installer-pc' >&2
 		exit 1
 	fi
-	if [ "x${cmd_installer_pc_opt_p+set}" != 'xset' ]; then
+	if [ "x${cmd_installer_pc_opt_p-}" = 'x' ]; then
 		print_cmd_usage 'installer-pc' >&2
 		exit 1
 	fi
--
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