From 5ddabb8348165b7bdd1385288a17937bbda76743 Mon Sep 17 00:00:00 2001
From: Jilles Tjoelker <jilles@FreeBSD.org>
Date: Sat, 12 Jul 2014 10:27:30 +0000
Subject: [PATCH] sh: Consistently treat ${01} like $1.

Leading zeroes were ignored when checking whether a positional parameter is
set, but not when expanding its value. Ignore leading zeroes in any case.
---
 bin/sh/expand.c                       | 13 ++++++-------
 bin/sh/tests/parameters/Makefile      |  1 +
 bin/sh/tests/parameters/positional4.0 |  4 ++++
 3 files changed, 11 insertions(+), 7 deletions(-)
 create mode 100644 bin/sh/tests/parameters/positional4.0

diff --git a/bin/sh/expand.c b/bin/sh/expand.c
index a126ca60a6d..b8ef5ea1b67 100644
--- a/bin/sh/expand.c
+++ b/bin/sh/expand.c
@@ -928,17 +928,16 @@ numvar:
 				STPUTC(sep, expdest);
 		}
 		break;
-	case '0':
-		p = arg0;
-		strtodest(p, flag, subtype, quoted);
-		break;
 	default:
 		if (is_digit(*name)) {
 			num = atoi(name);
-			if (num > 0 && num <= shellparam.nparam) {
+			if (num == 0)
+				p = arg0;
+			else if (num > 0 && num <= shellparam.nparam)
 				p = shellparam.p[num - 1];
-				strtodest(p, flag, subtype, quoted);
-			}
+			else
+				break;
+			strtodest(p, flag, subtype, quoted);
 		}
 		break;
 	}
diff --git a/bin/sh/tests/parameters/Makefile b/bin/sh/tests/parameters/Makefile
index 4f9ae31ce3b..25742263e82 100644
--- a/bin/sh/tests/parameters/Makefile
+++ b/bin/sh/tests/parameters/Makefile
@@ -14,6 +14,7 @@ FILES+=		optind2.0
 FILES+=		positional1.0
 FILES+=		positional2.0
 FILES+=		positional3.0
+FILES+=		positional4.0
 FILES+=		pwd1.0
 FILES+=		pwd2.0
 
diff --git a/bin/sh/tests/parameters/positional4.0 b/bin/sh/tests/parameters/positional4.0
new file mode 100644
index 00000000000..c1c380c0fea
--- /dev/null
+++ b/bin/sh/tests/parameters/positional4.0
@@ -0,0 +1,4 @@
+# $FreeBSD$
+
+set -- "x$0" 2 3 4 5 6 7 8 9 "y$0"
+[ "${01}.${010}" = "$1.${10}" ]