Add a couple of regression tests for /bin/sh.

tools/regression/bin/sh/Makefile

@@ -0,0 +1,4 @@
+# $FreeBSD$
+
+all:
+	sh regress.sh

tools/regression/bin/sh/builtins/alias.0

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+# $FreeBSD$
+set -e
+
+unalias -a
+alias foo=bar
+alias

tools/regression/bin/sh/builtins/alias.0.stdout

@@ -0,0 +1 @@
+foo='bar'

tools/regression/bin/sh/builtins/alias.1

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+# $FreeBSD$
+unalias -a
+alias foo

tools/regression/bin/sh/builtins/alias.1.stderr

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+alias: foo not found

tools/regression/bin/sh/builtins/unalias.0

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+# $FreeBSD$
+set -e
+
+alias false=true
+false
+unalias false
+false && exit 1
+unalias false && exit 1
+
+alias a1=foo a2=bar
+unalias a1 a2
+unalias a1 && exit 1
+unalias a2 && exit 1
+alias a2=bar
+unalias a1 a2 && exit 1
+
+alias a1=foo a2=bar
+unalias -a
+unalias a1 && exit 1
+unalias a2 && exit 1
+exit 0

tools/regression/bin/sh/regress.sh

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+# $FreeBSD$
+
+echo '1..31'
+
+COUNTER=1
+
+do_test() {
+	local c
+	c=${COUNTER}
+	COUNTER=$((COUNTER+1))
+	sh $1 > tmp.stdout 2> tmp.stderr
+	if [ $? -ne $2 ]; then
+		echo "not ok ${c} - ${1} # wrong exit status"
+		rm tmp.stdout tmp.stderr
+		return
+	fi
+	for i in stdout stderr; do
+		if [ -f ${1}.${i} ]; then
+			if ! cmp -s tmp.${i} ${1}.${i}; then
+				echo "not ok ${c} - ${1} # wrong output on ${i}"
+				rm tmp.stdout tmp.stderr
+				return
+			fi
+		elif [ -s tmp.${i} ]; then
+			echo "not ok ${c} - ${1} # wrong output on ${i}"
+			rm tmp.stdout tmp.stderr
+			return
+		fi
+	done
+	echo "ok ${c} - ${1}"
+	rm tmp.stdout tmp.stderr
+}
+
+SUCCESS=$(find . -name "*.0")
+for i in ${SUCCESS} ; do
+	do_test ${i} 0
+done
+	
+FAILURE=$(find . -name "*.1")
+for i in ${FAILURE} ; do
+	do_test ${i} 1
+done

tools/regression/bin/sh/regress.t

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+#!/bin/sh
+# $FreeBSD$
+
+cd `dirname $0`
+
+sh regress.sh

tools/regression/bin/sh/set-e/and1.0

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+# $FreeBSD$
+set -e
+true && true

tools/regression/bin/sh/set-e/and2.1

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+# $FreeBSD$
+set -e
+true && false
+exit 0

tools/regression/bin/sh/set-e/and3.0

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+# $FreeBSD$
+set -e
+false && true
+exit 0

tools/regression/bin/sh/set-e/and4.0

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+# $FreeBSD$
+set -e
+false && false
+exit 0

tools/regression/bin/sh/set-e/background1.0

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+# $FreeBSD$
+set -e
+false &

tools/regression/bin/sh/set-e/cmd1.0

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+# $FreeBSD$
+set -e
+true

tools/regression/bin/sh/set-e/cmd2.1

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+# $FreeBSD$
+set -e
+false
+exit 0

tools/regression/bin/sh/set-e/elif1.0

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+# $FreeBSD$
+set -e
+if false; then
+elif false; then
+fi

tools/regression/bin/sh/set-e/elif2.0

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+# $FreeBSD$
+set -e
+if false; then
+elif false; false; then
+fi

tools/regression/bin/sh/set-e/if1.0

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+# $FreeBSD$
+set -e
+if false; then
+fi

tools/regression/bin/sh/set-e/if2.0

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+# $FreeBSD$
+set -e
+# PR 28852
+if true; then
+	false && true
+fi
+exit 0

tools/regression/bin/sh/set-e/if3.0

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+# $FreeBSD$
+set -e
+if false; false then
+fi

tools/regression/bin/sh/set-e/not1.0

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+# $FreeBSD$
+set -e
+! true
+exit 0

tools/regression/bin/sh/set-e/not2.0

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+# $FreeBSD$
+set -e
+! false

tools/regression/bin/sh/set-e/or1.0

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+# $FreeBSD$
+set -e
+true || false

tools/regression/bin/sh/set-e/or2.0

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+# $FreeBSD$
+set -e
+false || true

tools/regression/bin/sh/set-e/or3.1

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+# $FreeBSD$
+set -e
+false || false
+exit 0

tools/regression/bin/sh/set-e/pipe1.1

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+# $FreeBSD$
+set -e
+true | false
+exit 0

tools/regression/bin/sh/set-e/pipe2.0

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+# $FreeBSD$
+set -e
+false | true

tools/regression/bin/sh/set-e/return1.0

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+# $FreeBSD$
+set -e
+
+# PR 85267
+f() {
+	false || return 1
+	return 0
+}
+
+f || true
+exit 0

tools/regression/bin/sh/set-e/semi1.1

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+# $FreeBSD$
+set -e
+false; true
+exit 0

tools/regression/bin/sh/set-e/semi2.1

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+# $FreeBSD$
+set -e
+true; false
+exit 0

tools/regression/bin/sh/set-e/subshell1.0

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+# $FreeBSD$
+set -e
+(true)

tools/regression/bin/sh/set-e/subshell2.1

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+# $FreeBSD$
+set -e
+(false)
+exit 0

tools/regression/bin/sh/set-e/until1.0

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+# $FreeBSD$
+set -e
+until false; do
+	break
+done

tools/regression/bin/sh/set-e/until2.0

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+# $FreeBSD$
+set -e
+until false; false; do
+	break
+done

tools/regression/bin/sh/set-e/while1.0

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+# $FreeBSD$
+set -e
+while false; do
+done

tools/regression/bin/sh/set-e/while2.0

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+# $FreeBSD$
+set -e
+while false; false; do
+done