Add a few very basic tests for cd -{L,P} and pwd -{L,P}.

tools/regression/bin/sh/builtins/cd1.0

@@ -1,17 +1,27 @@
 # $FreeBSD$
 set -e
 
-PDIR=${TMPDIR:-/tmp}
-cd ${PDIR}
-TMPDIR=$(mktemp -d sh-test.XXXXXX)
-chmod 0 ${TMPDIR}
+P=${TMPDIR:-/tmp}
+cd $P
+T=$(mktemp -d sh-test.XXXXXX)
 
-cd -L ${TMPDIR} 2>/dev/null && exit 1
-[ "${PWD}" = "${PDIR}" ]
-[ "$(pwd)" = "${PDIR}" ]
-cd -P ${TMPDIR} 2>/dev/null && exit 1
-[ "${PWD}" = "${PDIR}" ]
-[ "$(pwd)" = "${PDIR}" ]
+chmod 0 $T
+cd -L $T 2>/dev/null && exit 1
+[ "$PWD" = "$P" ]
+[ "$(pwd)" = "$P" ]
+cd -P $T 2>/dev/null && exit 1
+[ "$PWD" = "$P" ]
+[ "$(pwd)" = "$P" ]
 
-chmod 755 ${TMPDIR}
-rmdir ${TMPDIR}
+chmod 755 $T
+cd $T
+mkdir -p 1/2/3
+ln -s 1/2 link1
+ln -s 2/3 1/link2
+(cd -L 1/../1 && [ "$(pwd -L)" = "$P/$T/1" ])
+(cd -L link1 && [ "$(pwd -L)" = "$P/$T/link1" ])
+(cd -L link1 && [ "$(pwd -P)" = "$P/$T/1/2" ])
+(cd -P link1 && [ "$(pwd -L)" = "$P/$T/1/2" ])
+(cd -P link1 && [ "$(pwd -P)" = "$P/$T/1/2" ])
+
+rm -rf ${P}/${T}