7 files changed, 1429 insertions, 0 deletions
diff --git a/testsuite/check.sh b/testsuite/check.sh
new file mode 100755
index 0000000..730dfa6
--- /dev/null
+++ b/testsuite/check.sh
@@ -0,0 +1,685 @@
+#! /bin/sh
+# check script for Zutils - Utilities dealing with compressed files
+# Copyright (C) 2009-2024 Antonio Diaz Diaz.
+#
+# This script is free software: you have unlimited permission
+# to copy, distribute, and modify it.
+
+LC_ALL=C
+export LC_ALL
+objdir=`pwd`
+testdir=`cd "$1" ; pwd`
+ZCAT="${objdir}"/zcat
+ZCMP="${objdir}"/zcmp
+ZDIFF="${objdir}"/zdiff
+ZGREP="${objdir}"/zgrep
+ZEGREP="${objdir}"/zegrep
+ZFGREP="${objdir}"/zfgrep
+ZTEST="${objdir}"/ztest
+ZUPDATE="${objdir}"/zupdate
+compressors="bzip2 gzip lzip"
+extensions="bz2 gz lz"
+compressor_needed() { echo "${compressors} are needed to run tests" ; exit 1 ; }
+framework_failure() { echo "failure in testing framework" ; exit 1 ; }
+
+if [ ! -f "${ZUPDATE}" ] || [ ! -x "${ZUPDATE}" ] ; then
+	echo "${ZUPDATE}: cannot execute"
+	exit 1
+fi
+
+[ -e "${ZUPDATE}" ] 2> /dev/null ||
+	{
+	echo "$0: a POSIX shell is required to run the tests"
+	echo "Try bash -c \"$0 $1 $2\""
+	exit 1
+	}
+
+if [ -d tmp ] ; then rm -rf tmp ; fi
+mkdir tmp
+cd "${objdir}"/tmp || framework_failure
+
+for i in ${compressors}; do
+	cat "${testdir}"/test.txt > in || framework_failure
+	$i in || compressor_needed
+	printf "Hello World!\n" > hello || framework_failure
+	$i hello || compressor_needed
+	touch zero || framework_failure
+	$i zero || compressor_needed
+done
+
+cat "${testdir}"/test.txt > in || framework_failure
+cat "${testdir}"/test.txt.tar > in.tar || framework_failure
+printf "01234567890" > pin.tar4 || framework_failure
+cat in.tar in.tar in.tar in.tar >> pin.tar4 || framework_failure
+cat in > -in- || framework_failure
+cat in.lz > -in-.lz || framework_failure
+cat in.lz > lz_only.lz || framework_failure
+cat in in in in in in > in6 || framework_failure
+bad0_lz="${testdir}"/zero_bad_crc.lz
+bad0_gz="${testdir}"/zero_bad_crc.gz
+bad1_lz="${testdir}"/test_bad_crc.lz
+touch empty empty.bz2 empty.gz empty.lz || framework_failure
+fail=0
+test_failed() { fail=1 ; printf " $1" ; [ -z "$2" ] || printf "($2)" ; }
+
+printf "testing    zcat-%s..." "$2"
+
+for i in ${extensions}; do
+	"${ZCAT}" -N in.$i > out || test_failed $LINENO $i
+	cmp in out || test_failed $LINENO $i
+	"${ZCAT}" -N empty in.$i > out || test_failed $LINENO $i
+	cmp in out || test_failed $LINENO $i
+	"${ZCAT}" -N empty.$i in.$i > out || test_failed $LINENO $i
+	cmp in out || test_failed $LINENO $i
+	"${ZCAT}" -N in.$i empty > out || test_failed $LINENO $i
+	cmp in out || test_failed $LINENO $i
+	"${ZCAT}" -N in.$i empty.$i > out || test_failed $LINENO $i
+	cmp in out || test_failed $LINENO $i
+	"${ZCAT}" -N zero.$i in.$i > out || test_failed $LINENO $i
+	cmp in out || test_failed $LINENO $i
+	"${ZCAT}" -N in.$i zero.$i > out || test_failed $LINENO $i
+	cmp in out || test_failed $LINENO $i
+	"${ZCAT}" -N --format=un in.$i > out || test_failed $LINENO $i
+	cmp in out || test_failed $LINENO $i
+	"${ZCAT}" -N --force-format=$i in.$i > out || test_failed $LINENO $i
+	cmp in out || test_failed $LINENO $i
+	"${ZCAT}" -N in.$i | dd bs=1000 count=1 > out 2> /dev/null ||
+		test_failed $LINENO $i
+	dd if=in bs=1000 count=1 2> /dev/null | cmp - out ||
+		test_failed $LINENO $i
+done
+
+printf "LZIP\001-.............................." | "${ZCAT}" -N > /dev/null 2>&1
+[ $? = 1 ] || test_failed $LINENO
+printf "LZIPxxxxxx" | "${ZCAT}" -N > /dev/null || test_failed $LINENO
+printf "BZh9xxxxxx" | "${ZCAT}" -N > /dev/null || test_failed $LINENO
+"${ZCAT}" -N -v -s "${testdir}"/zcat_vs.dat > /dev/null || test_failed $LINENO
+"${ZCAT}" -N < in > out || test_failed $LINENO
+cmp in out || test_failed $LINENO
+"${ZCAT}" -N < in.gz > out || test_failed $LINENO
+cmp in out || test_failed $LINENO
+"${ZCAT}" -N < in.bz2 > out || test_failed $LINENO
+cmp in out || test_failed $LINENO
+"${ZCAT}" -N < in.lz > out || test_failed $LINENO
+cmp in out || test_failed $LINENO
+"${ZCAT}" -N -O lz - - < in.lz > out || test_failed $LINENO
+cmp in out || test_failed $LINENO
+"${ZCAT}" -N -O un in.lz | lzip -d > out || test_failed $LINENO
+cmp in out || test_failed $LINENO
+"${ZCAT}" -N --lz='lzip -q' < in.lz > out || test_failed $LINENO
+cmp in out || test_failed $LINENO
+"${ZCAT}" -N in > out || test_failed $LINENO
+cmp in out || test_failed $LINENO
+"${ZCAT}" -N lz_only > out || test_failed $LINENO
+cmp in out || test_failed $LINENO
+cat in.lz in in in in | "${ZCAT}" -N > out || test_failed $LINENO	# tdata
+cmp in out || test_failed $LINENO
+"${ZCAT}" -N in in.gz in.bz2 in.lz -- -in- -in-.lz > out || test_failed $LINENO
+cmp in6 out || test_failed $LINENO
+"${ZCAT}" -Nq in in.gz in.bz2 in.lz "${bad0_lz}" -- -in- -in-.lz > out
+[ $? = 1 ] || test_failed $LINENO
+cmp in6 out || test_failed $LINENO
+"${ZCAT}" -Nq "${bad1_lz}" -- -in-.lz in in.gz in.bz2 in.lz > out
+[ $? = 1 ] || test_failed $LINENO
+cmp in6 out || test_failed $LINENO
+"${ZCAT}" -N . || test_failed $LINENO
+"${ZCAT}" -N -r . > /dev/null || test_failed $LINENO
+"${ZCAT}" -N -r > /dev/null || test_failed $LINENO
+"${ZCAT}" -N -R . > /dev/null || test_failed $LINENO
+"${ZCAT}" -N -R > /dev/null || test_failed $LINENO
+
+"${ZCAT}" -Nq "" < in.lz > /dev/null
+[ $? = 1 ] || test_failed $LINENO
+"${ZCAT}" -Nq --format=, in.lz
+[ $? = 1 ] || test_failed $LINENO
+"${ZCAT}" -Nq --format=,lz in.lz
+[ $? = 1 ] || test_failed $LINENO
+"${ZCAT}" -Nq --format=gz,,lz in.lz
+[ $? = 1 ] || test_failed $LINENO
+"${ZCAT}" -Nq --format=lz,, in.lz
+[ $? = 1 ] || test_failed $LINENO
+"${ZCAT}" -Nq --format=nc in.lz
+[ $? = 1 ] || test_failed $LINENO
+"${ZCAT}" -Nq --lz='-lzip -q' in.lz
+[ $? = 1 ] || test_failed $LINENO
+"${ZCAT}" -N --force-format=gz in.bz2 2> /dev/null
+[ $? = 1 ] || test_failed $LINENO
+"${ZCAT}" -N --force-format=bz2 in.lz 2> /dev/null
+[ $? = 1 ] || test_failed $LINENO
+"${ZCAT}" -Nq --force-format=lz in.gz
+[ $? = 1 ] || test_failed $LINENO
+"${ZCAT}" -N --bad-option 2> /dev/null
+[ $? = 1 ] || test_failed $LINENO
+
+
+printf "\ntesting    zcmp-%s..." "$2"
+
+for i in ${extensions}; do
+	"${ZCMP}" -N in.$i || test_failed $LINENO $i
+	"${ZCMP}" -N in in.$i || test_failed $LINENO $i
+	"${ZCMP}" -N in in.$i --force-format=,$i || test_failed $LINENO $i
+	"${ZCMP}" -N in.$i in || test_failed $LINENO $i
+	"${ZCMP}" -N in.$i in --force-format=$i || test_failed $LINENO $i
+	"${ZCMP}" -N -i 1kB:1000 -n 500 in6 in.$i || test_failed $LINENO $i
+	"${ZCMP}" -N -i 1KiB:1024 -n 50 in.$i in6 || test_failed $LINENO $i
+	"${ZCMP}" -N empty empty.$i || test_failed $LINENO $i
+	"${ZCMP}" -N empty zero.$i || test_failed $LINENO $i
+done
+
+"${ZCMP}" -N -q in in6
+[ $? = 1 ] || test_failed $LINENO
+"${ZCMP}" -N -n 0 in in6 || test_failed $LINENO
+"${ZCMP}" -N -n 100B in in6 || test_failed $LINENO
+"${ZCMP}" -N -n 1k in in6 || test_failed $LINENO
+"${ZCMP}" -N -n 10kB in in6 || test_failed $LINENO
+"${ZCMP}" -N -n 01750 in in6 || test_failed $LINENO
+"${ZCMP}" -N -n 0x3E8 in in6 || test_failed $LINENO
+"${ZCMP}" -N -s in.tar pin.tar4
+[ $? = 1 ] || test_failed $LINENO
+"${ZCMP}" -N -q -i 0B:11B in.tar pin.tar4
+[ $? = 1 ] || test_failed $LINENO
+"${ZCMP}" -N -i 0:11 -n 0 in.tar pin.tar4 || test_failed $LINENO
+"${ZCMP}" -N -i 0:11 -n 100 in.tar pin.tar4 || test_failed $LINENO
+"${ZCMP}" -N -i 0:013 -n 1Ki in.tar pin.tar4 || test_failed $LINENO
+"${ZCMP}" -N -i 0:0xB -n 10KiB in.tar pin.tar4 || test_failed $LINENO
+"${ZCMP}" -N - - || test_failed $LINENO
+"${ZCMP}" -N -q -
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N in in || test_failed $LINENO
+"${ZCMP}" -N in || test_failed $LINENO
+"${ZCMP}" -N --format=gz,bz2 in || test_failed $LINENO
+"${ZCMP}" -N --format=gz in || test_failed $LINENO
+"${ZCMP}" -N in.lz in.gz || test_failed $LINENO
+cat in.lz | "${ZCMP}" -N -O un,un in.lz - || test_failed $LINENO
+"${ZCMP}" -N --lz='lzip -q' in.lz in.gz || test_failed $LINENO
+"${ZCMP}" -N in.gz -- -in-.lz || test_failed $LINENO
+"${ZCMP}" -N -- -in-.lz in.gz || test_failed $LINENO
+"${ZCMP}" -N in -- -in-.lz || test_failed $LINENO
+"${ZCMP}" -N -- -in- in.lz || test_failed $LINENO
+"${ZCMP}" -N in.lz -- -in- || test_failed $LINENO
+"${ZCMP}" -N -- -in-.lz in || test_failed $LINENO
+"${ZCMP}" -N -- -in- in || test_failed $LINENO
+"${ZCMP}" -N in -- -in- || test_failed $LINENO
+"${ZCMP}" -N in.lz - < in || test_failed $LINENO
+"${ZCMP}" -N - in.lz < in || test_failed $LINENO
+"${ZCMP}" -N in - < in.lz || test_failed $LINENO
+"${ZCMP}" -N - in < in.lz || test_failed $LINENO
+"${ZCMP}" -N lz_only.lz - < in || test_failed $LINENO
+"${ZCMP}" -N -q lz_only.lz
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N -q "" in
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N -q --force-format=lz in.lz
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N -q --force-format=lz in.gz in.lz
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N -q -i 100BB in in
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N -q -i 100BB:100 in in
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N -q -i 100: in in
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N -q -n -1 in in
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N -q -n 100BB in in
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N -q --gz=bad-gzip in.gz in.lz
+[ $? = 2 ] || test_failed $LINENO
+"${ZCMP}" -N --bad-option in in 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+cat in.gz > a.gz || framework_failure
+cat in.lz > a.lz || framework_failure
+"${ZCMP}" -N a.gz || test_failed $LINENO
+"${ZCMP}" -N a.lz || test_failed $LINENO
+
+
+printf "\ntesting   zdiff-%s..." "$2"
+
+"${ZDIFF}" -N a.gz || test_failed $LINENO
+"${ZDIFF}" -N a.lz || test_failed $LINENO
+rm -f a.gz a.lz || framework_failure
+
+for i in ${extensions}; do
+	"${ZDIFF}" -N in.$i > /dev/null || test_failed $LINENO $i
+	"${ZDIFF}" -N in in.$i > /dev/null || test_failed $LINENO $i
+	"${ZDIFF}" -N in in.$i --force-format=,$i > /dev/null ||
+		test_failed $LINENO $i
+	"${ZDIFF}" -N in.$i in > /dev/null || test_failed $LINENO $i
+	"${ZDIFF}" -N in.$i in --force-format=$i, > /dev/null ||
+		test_failed $LINENO $i
+	"${ZDIFF}" -N empty empty.$i > /dev/null || test_failed $LINENO $i
+	"${ZDIFF}" -N empty zero.$i > /dev/null || test_failed $LINENO $i
+done
+
+"${ZDIFF}" -N in in6 > /dev/null
+[ $? = 1 ] || test_failed $LINENO
+# GNU diff 3.0 returns 2 (instead of 1) when binary files differ
+"${ZDIFF}" -N in.tar pin.tar4 > /dev/null && test_failed $LINENO
+"${ZDIFF}" -N - - || test_failed $LINENO
+"${ZDIFF}" -N - 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZDIFF}" -N in in || test_failed $LINENO
+"${ZDIFF}" -N in || test_failed $LINENO
+"${ZDIFF}" -N --format=gz,bz2 in || test_failed $LINENO
+"${ZDIFF}" -N --format=gz in || test_failed $LINENO
+"${ZDIFF}" -N in.lz in.gz > /dev/null || test_failed $LINENO
+cat in.gz | "${ZDIFF}" -N -O un,un - in.gz || test_failed $LINENO
+"${ZDIFF}" -N --lz='lzip -q' in.lz in.gz > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N in.gz -- -in-.lz > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N -- -in-.lz in.gz > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N in -- -in-.lz > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N -- -in- in.lz > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N in.lz -- -in- > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N -- -in-.lz in > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N -- -in- in > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N in -- -in- > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N in.lz - < in > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N - in.lz < in > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N in - < in.lz > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N - in < in.lz > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N lz_only.lz - < in > /dev/null || test_failed $LINENO
+"${ZDIFF}" -N lz_only.lz 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZDIFF}" -N "" in 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZDIFF}" -N --bz2='-bzip2' in.bz2 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZDIFF}" -N --brief --force-format=bz2 in.bz2 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZDIFF}" -N --brief --force-format=,lz in.lz in.bz2 > /dev/null 2>&1
+[ $? = 2 ] || test_failed $LINENO
+"${ZDIFF}" -N --brief --gz=bad-gzip in.gz in.lz > /dev/null 2>&1
+[ $? = 2 ] || test_failed $LINENO
+"${ZDIFF}" -N --bad-option 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+
+mkdir tmp2
+cat in > tmp2/a || framework_failure
+cat in.lz > tmp2/a.lz || framework_failure
+"${ZDIFF}" -N --format=bz2 tmp2/a 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZDIFF}" -N --format=gz tmp2/a 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZDIFF}" -N --format=lz tmp2/a.lz 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZDIFF}" -N --format=lz tmp2/a || test_failed $LINENO
+"${ZDIFF}" -N --format=un tmp2/a.lz || test_failed $LINENO
+rm -r tmp2 || framework_failure
+
+
+printf "\ntesting   zgrep-%s..." "$2"
+
+for i in ${extensions}; do
+	"${ZGREP}" -N "GNU" in.$i > /dev/null || test_failed $LINENO $i
+	"${ZGREP}" -N "GNU" in.$i hello.$i > /dev/null || test_failed $LINENO $i
+	"${ZGREP}" -N "GNU" hello.$i in.$i > /dev/null || test_failed $LINENO $i
+	"${ZGREP}" -N -q "GNU" in.$i hello.$i || test_failed $LINENO $i
+	"${ZGREP}" -N -q "GNU" hello.$i in.$i || test_failed $LINENO $i
+	"${ZGREP}" -N "GNU" < in.$i > /dev/null || test_failed $LINENO $i
+	"${ZGREP}" -N -l "GNU" in.$i > /dev/null || test_failed $LINENO $i
+	"${ZGREP}" -N -L "GNU" in.$i || test_failed $LINENO $i
+	"${ZGREP}" -N --force-format=$i "GNU" in.$i > /dev/null ||
+		test_failed $LINENO $i
+	"${ZGREP}" -N -v "nx_pattern" in.$i > /dev/null ||
+		test_failed $LINENO $i
+	"${ZGREP}" -N "nx_pattern" in.$i && test_failed $LINENO $i
+	"${ZGREP}" -N -l "nx_pattern" in.$i && test_failed $LINENO $i
+	"${ZGREP}" -N -L "nx_pattern" in.$i > /dev/null &&
+		test_failed $LINENO $i
+	"${ZGREP}" -N --force-format=$i "GNU" in 2> /dev/null
+	[ $? = 2 ] || test_failed $LINENO $i
+	"${ZGREP}" -N "nx_pattern" empty.$i && test_failed $LINENO $i
+	"${ZGREP}" -N "nx_pattern" zero.$i && test_failed $LINENO $i
+done
+
+"${ZGREP}" -N "nx_pattern" empty && test_failed $LINENO
+"${ZGREP}" -N pin.tar4 -e "GNU" > /dev/null || test_failed $LINENO
+"${ZGREP}" -N "GNU" < pin.tar4 > /dev/null || test_failed $LINENO
+"${ZGREP}" -N -r "GNU" . > /dev/null || test_failed $LINENO
+"${ZGREP}" -N -r "GNU" > /dev/null || test_failed $LINENO
+"${ZGREP}" -N -R "GNU" . > /dev/null || test_failed $LINENO
+"${ZGREP}" -N -R "GNU" > /dev/null || test_failed $LINENO
+"${ZGREP}" -N "nx_pattern" -r . in > /dev/null && test_failed $LINENO
+"${ZGREP}" -N -e "GNU" in > /dev/null || test_failed $LINENO
+"${ZGREP}" -N "GNU" < in > /dev/null || test_failed $LINENO
+"${ZGREP}" -N -O lz "nx_pattern" - - < in.lz > /dev/null && test_failed $LINENO
+"${ZGREP}" -N -O un "LZIP" in.lz > /dev/null || test_failed $LINENO
+"${ZGREP}" -N -e "-free" --lz='lzip -q' < in.lz > /dev/null ||
+	test_failed $LINENO
+"${ZGREP}" -N -- "-free" -in- > /dev/null || test_failed $LINENO
+"${ZGREP}" -N -q -- "-free" nx_file -in-.lz || test_failed $LINENO
+"${ZGREP}" -N "GNU" in in.gz in.bz2 in.lz -- -in- > /dev/null ||
+	test_failed $LINENO
+"${ZGREP}" -N -l "GNU" in in.gz in.bz2 in.lz -- -in- > /dev/null ||
+	test_failed $LINENO
+"${ZGREP}" -N -l -Z "GNU" in in.gz in.bz2 in.lz -- -in- > /dev/null ||
+	test_failed $LINENO
+"${ZGREP}" -N -L "GNU" in in.gz in.bz2 in.lz -- -in- || test_failed $LINENO
+"${ZGREP}" -N -l "nx_pattern" in in.gz in.bz2 in.lz -- -in- &&
+	test_failed $LINENO
+"${ZGREP}" -N -L "nx_pattern" in in.gz in.bz2 in.lz -- -in- > /dev/null &&
+	test_failed $LINENO
+"${ZGREP}" -Nq -l "01234567890" in "${bad1_lz}" in.lz && test_failed $LINENO
+"${ZGREP}" -Nq -l "01234567890" in "${bad1_lz}" in.lz pin.tar4 > /dev/null ||
+	test_failed $LINENO
+
+"${ZGREP}" -N "GNU" .
+[ $? = 1 ] || test_failed $LINENO
+"${ZGREP}" -N "GNU" "" < in.lz 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZGREP}" -N --bad-option 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZGREP}" -N "GNU" -s nx_file
+[ $? = 2 ] || test_failed $LINENO
+"${ZGREP}" -N -q
+[ $? = 2 ] || test_failed $LINENO
+
+"${ZEGREP}" -N "GNU" in > /dev/null || test_failed $LINENO
+"${ZFGREP}" -N "GNU" in > /dev/null || test_failed $LINENO
+
+
+printf "\ntesting   ztest-%s..." "$2"
+
+for i in ${extensions}; do
+	"${ZTEST}" -N --force-format=$i < in.$i || test_failed $LINENO $i
+	"${ZTEST}" -N --force-format=$i < in 2> /dev/null
+	[ $? = 2 ] || test_failed $LINENO $i
+	"${ZTEST}" -N --force-format=$i in 2> /dev/null
+	[ $? = 2 ] || test_failed $LINENO $i
+	"${ZTEST}" -N empty.$i 2> /dev/null
+	[ $? = 2 ] || test_failed $LINENO $i
+done
+
+rm -f empty.bz2 empty.gz empty.lz || framework_failure
+"${ZTEST}" -N in in.gz in.bz2 in.lz -- -in- || test_failed $LINENO
+"${ZTEST}" -N < in.gz || test_failed $LINENO
+"${ZTEST}" -N < in.bz2 || test_failed $LINENO
+"${ZTEST}" -N < in.lz || test_failed $LINENO
+"${ZTEST}" -N - < in.lz || test_failed $LINENO
+"${ZTEST}" -N - in.gz - < in.lz || test_failed $LINENO
+"${ZTEST}" -N --lz='lzip -q' < in.lz || test_failed $LINENO
+"${ZTEST}" -N -r . || test_failed $LINENO
+"${ZTEST}" -N -r || test_failed $LINENO
+"${ZTEST}" -N -R . || test_failed $LINENO
+"${ZTEST}" -N -R || test_failed $LINENO
+"${ZTEST}" -N empty || test_failed $LINENO
+
+# test wrong compressed extensions
+cat in.bz2 > in_bz2.gz || framework_failure
+cat in.gz > in_gz.lz || framework_failure
+cat in.lz > in_lz.bz2 || framework_failure
+cat in > in_un.lz || framework_failure
+"${ZTEST}" -Nq in_bz2.gz
+[ $? = 2 ] || test_failed $LINENO
+"${ZTEST}" -Nq in_gz.lz
+[ $? = 2 ] || test_failed $LINENO
+"${ZTEST}" -Nq in_lz.bz2
+[ $? = 2 ] || test_failed $LINENO
+"${ZTEST}" -Nq in_un.lz
+[ $? = 2 ] || test_failed $LINENO
+rm -f in_bz2.gz in_gz.lz in_lz.bz2 in_un.lz || framework_failure
+
+"${ZTEST}" -Nq in.gz "${bad0_lz}" in.bz2 "${bad1_lz}" in.lz
+[ $? = 2 ] || test_failed $LINENO
+lines=`"${ZTEST}" -N in.gz "${bad0_lz}" in.bz2 "${bad1_lz}" in.lz 2>&1 | wc -l`
+[ "${lines}" -eq 2 ] || test_failed $LINENO "${lines}"
+lines=`"${ZTEST}" -Nv in.gz "${bad0_lz}" in.bz2 "${bad1_lz}" in.lz 2>&1 | wc -l`
+[ "${lines}" -eq 6 ] || test_failed $LINENO "${lines}"
+"${ZTEST}" -Nq < in
+[ $? = 2 ] || test_failed $LINENO
+"${ZTEST}" -Nq --force-format=un < in.gz
+[ $? = 1 ] || test_failed $LINENO
+"${ZTEST}" -Nq "" < in.lz
+[ $? = 1 ] || test_failed $LINENO
+dd if=in.lz bs=1000 count=1 2> /dev/null | "${ZTEST}" -N -q
+[ $? = 2 ] || test_failed $LINENO
+"${ZTEST}" -Nq --force-format=lz in.bz2
+[ $? = 2 ] || test_failed $LINENO
+"${ZTEST}" -Nq --force-format=un in.gz
+[ $? = 1 ] || test_failed $LINENO
+"${ZTEST}" -N --lz='lzip --bad-option' in.lz 2> /dev/null
+[ $? = 1 ] || test_failed $LINENO
+"${ZTEST}" -N --bad-option 2> /dev/null
+[ $? = 1 ] || test_failed $LINENO
+
+
+printf "\ntesting zupdate-%s..." "$2"
+
+"${ZUPDATE}" -N "" || test_failed $LINENO
+cat in.bz2 > a.bz2 || framework_failure
+cat in.gz > a.gz || framework_failure
+"${ZUPDATE}" -Nq --bz2=bad_command a.bz2
+[ $? = 1 ] || test_failed $LINENO
+"${ZUPDATE}" -N --bz2='bzip2 --bad-option' a.bz2 > /dev/null 2>&1
+[ $? = 1 ] || test_failed $LINENO
+"${ZUPDATE}" -Nq --gz=bad_command a.gz
+[ $? = 1 ] || test_failed $LINENO
+"${ZUPDATE}" -N --gz='gzip --bad-option' a.gz 2> /dev/null
+[ $? = 1 ] || test_failed $LINENO
+"${ZUPDATE}" -Nq --lz=bad_command a.gz
+[ $? = 2 ] || test_failed $LINENO
+"${ZUPDATE}" -N --lz='lzip --bad-option' a.gz 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+"${ZUPDATE}" -N --bad-option 2> /dev/null
+[ $? = 2 ] || test_failed $LINENO
+
+if /bin/sh -c "tarlz -V" > /dev/null 2>&1; then
+	printf .
+	gzip < in.tar > in.tar.gz || framework_failure
+	"${ZUPDATE}" -N -k --lz='tarlz -0 -z --no-solid' in.tar.gz ||
+		test_failed $LINENO
+	[ -e in.tar ] || test_failed $LINENO
+	"${ZCMP}" -N in.tar.gz in.tar.lz || test_failed $LINENO
+	rm -f in.tar.gz in.tar.lz || framework_failure
+fi
+
+cat in.lz in.lz > a.lz || framework_failure
+"${ZUPDATE}" -N -q -f a.bz2 a.gz
+[ $? = 2 ] || test_failed $LINENO
+[ -e a.bz2 ] || test_failed $LINENO
+[ -e a.gz ] || test_failed $LINENO
+[ -e a.lz ] || test_failed $LINENO
+rm -f a.lz || framework_failure
+
+"${ZUPDATE}" -N -0 a.bz2 || test_failed $LINENO
+[ ! -e a.bz2 ] || test_failed $LINENO
+[ -e a.gz ] || test_failed $LINENO
+[ -e a.lz ] || test_failed $LINENO
+rm -f a.lz || framework_failure
+"${ZUPDATE}" -N -0 a.gz || test_failed $LINENO
+[ ! -e a.bz2 ] || test_failed $LINENO
+[ ! -e a.gz ] || test_failed $LINENO
+[ -e a.lz ] || test_failed $LINENO
+rm -f a.lz || framework_failure
+
+cat in.bz2 > a.bz2 || framework_failure
+cat in.gz > a.gz || framework_failure
+"${ZUPDATE}" -N -q -0 a.bz2 a.gz
+[ $? = 1 ] || test_failed $LINENO
+[ ! -e a.bz2 ] || test_failed $LINENO
+[ -e a.gz ] || test_failed $LINENO
+[ -e a.lz ] || test_failed $LINENO
+rm -f a.lz || framework_failure
+
+cat in.bz2 > a.bz2 || framework_failure
+cat in.gz > a.gz || framework_failure
+"${ZUPDATE}" -N -0 -f -k a.bz2 a.gz || test_failed $LINENO
+[ -e a.bz2 ] || test_failed $LINENO
+[ -e a.gz ] || test_failed $LINENO
+[ -e a.lz ] || test_failed $LINENO
+rm -f a.lz || framework_failure
+
+cat in.bz2 > a.bz2 || framework_failure
+cat in.gz > a.gz || framework_failure
+"${ZUPDATE}" -N -0 -f a.bz2 a.gz || test_failed $LINENO
+[ ! -e a.bz2 ] || test_failed $LINENO
+[ ! -e a.gz ] || test_failed $LINENO
+[ ! -e a ] || test_failed $LINENO
+[ -e a.lz ] || test_failed $LINENO
+rm -f a.lz || framework_failure
+
+cat in.bz2 > a.tbz || framework_failure		# keep combined extensions
+cat in.bz2 > b.tbz2 || framework_failure
+cat in.gz > c.tgz || framework_failure
+"${ZUPDATE}" -N -0 a.tbz b.tbz2 c.tgz || test_failed $LINENO
+[ ! -e a.tbz ] || test_failed $LINENO
+[ ! -e b.tbz2 ] || test_failed $LINENO
+[ ! -e c.tgz ] || test_failed $LINENO
+[ ! -e a ] || test_failed $LINENO
+[ ! -e b ] || test_failed $LINENO
+[ ! -e c ] || test_failed $LINENO
+[ ! -e a.lz ] || test_failed $LINENO
+[ ! -e b.lz ] || test_failed $LINENO
+[ ! -e c.lz ] || test_failed $LINENO
+[ -e a.tlz ] || test_failed $LINENO
+[ -e b.tlz ] || test_failed $LINENO
+[ -e c.tlz ] || test_failed $LINENO
+rm -f a.tlz b.tlz c.tlz || framework_failure
+
+cat in.bz2 > a.tbz || framework_failure		# expand combined extensions
+cat in.bz2 > b.tbz2 || framework_failure
+cat in.gz > c.tgz || framework_failure
+"${ZUPDATE}" -N -0 -e a.tbz b.tbz2 c.tgz || test_failed $LINENO
+[ ! -e a.tbz ] || test_failed $LINENO
+[ ! -e b.tbz2 ] || test_failed $LINENO
+[ ! -e c.tgz ] || test_failed $LINENO
+[ ! -e a ] || test_failed $LINENO
+[ ! -e b ] || test_failed $LINENO
+[ ! -e c ] || test_failed $LINENO
+[ -e a.tar.lz ] || test_failed $LINENO
+[ -e b.tar.lz ] || test_failed $LINENO
+[ -e c.tar.lz ] || test_failed $LINENO
+[ ! -e a.tlz ] || test_failed $LINENO
+[ ! -e b.tlz ] || test_failed $LINENO
+[ ! -e c.tlz ] || test_failed $LINENO
+rm -f a.tar.lz b.tar.lz c.tar.lz || framework_failure
+
+# test decompression error
+cat in.bz2 > a.bz2 || framework_failure
+cat "${bad0_gz}" > b.gz || framework_failure
+cat in.gz > c.gz || framework_failure
+"${ZUPDATE}" -N -0 -f a.bz2 b.gz c.gz 2> /dev/null
+[ $? = 1 ] || test_failed $LINENO
+[ ! -e a.bz2 ] || test_failed $LINENO
+[ -e b.gz ] || test_failed $LINENO
+[ -e c.gz ] || test_failed $LINENO
+[ ! -e a ] || test_failed $LINENO
+[ ! -e b ] || test_failed $LINENO
+[ ! -e c ] || test_failed $LINENO
+[ -e a.lz ] || test_failed $LINENO
+# ignore error
+cat in.bz2 > a.bz2 || framework_failure
+cat "${bad0_gz}" > b.gz || framework_failure
+cat in.gz > c.gz || framework_failure
+"${ZUPDATE}" -N -0 -f -i a.bz2 b.gz c.gz 2> /dev/null
+[ $? = 1 ] || test_failed $LINENO
+[ ! -e a.bz2 ] || test_failed $LINENO
+[ -e b.gz ] || test_failed $LINENO
+[ ! -e c.gz ] || test_failed $LINENO
+[ -e a.lz ] || test_failed $LINENO
+rm -f a.lz b.gz c.gz || framework_failure
+
+cat in.bz2 > a.bz2 || framework_failure
+"${ZUPDATE}" -N -0 -q a.bz2 || test_failed $LINENO
+[ ! -e a.bz2 ] || test_failed $LINENO
+[ -e a.lz ] || test_failed $LINENO
+rm -f a.lz || framework_failure
+
+cat in.gz > 'name with spaces.gz' || framework_failure
+"${ZUPDATE}" -N -0 -q 'name with spaces.gz' || test_failed $LINENO
+[ ! -e 'name with spaces.gz' ] || test_failed $LINENO
+[ -e 'name with spaces.lz' ] || test_failed $LINENO
+"${ZCMP}" -N in 'name with spaces.lz' || test_failed $LINENO
+rm -f 'name with spaces.lz' || framework_failure
+
+cat zero.gz > z.gz || framework_failure
+"${ZUPDATE}" -N -0 -q z.gz || test_failed $LINENO
+[ ! -e z.gz ] || test_failed $LINENO
+[ -e z.lz ] || test_failed $LINENO
+"${ZCMP}" -N empty z.lz || test_failed $LINENO
+rm -f empty z.lz || framework_failure
+
+mkdir tmp2
+mkdir tmp2/tmp3
+cat in.bz2 > tmp2/tmp3/a.bz2 || framework_failure
+cat in.gz > tmp2/tmp3/a.gz || framework_failure
+# test recursive to destdir
+"${ZUPDATE}" -N -0 -k -r --format=gz --destdir=ddir1 tmp2 || test_failed $LINENO
+[ -e tmp2/tmp3/a.bz2 ] || test_failed $LINENO
+[ -e tmp2/tmp3/a.gz ] || test_failed $LINENO
+[ -e ddir1/tmp3/a.lz ] || test_failed $LINENO
+"${ZUPDATE}" -N -0 -k -r --format=bz2 --destdir="${objdir}"/tmp/ddir2 tmp2 ||
+	test_failed $LINENO
+[ -e tmp2/tmp3/a.bz2 ] || test_failed $LINENO
+[ -e tmp2/tmp3/a.gz ] || test_failed $LINENO
+[ -e ddir2/tmp3/a.lz ] || test_failed $LINENO
+# test non-recursive to destdir
+"${ZUPDATE}" -N -0 -k --destdir=ddir3/// tmp2/tmp3/a.gz || test_failed $LINENO
+[ -e tmp2/tmp3/a.bz2 ] || test_failed $LINENO
+[ -e tmp2/tmp3/a.gz ] || test_failed $LINENO
+[ -e ddir3/a.lz ] || test_failed $LINENO
+"${ZUPDATE}" -N -0 -k --destdir=ddir4/tmp2/tmp3 tmp2/tmp3/a.gz ||
+	test_failed $LINENO
+[ -e tmp2/tmp3/a.bz2 ] || test_failed $LINENO
+[ -e tmp2/tmp3/a.gz ] || test_failed $LINENO
+[ -e ddir4/tmp2/tmp3/a.lz ] || test_failed $LINENO
+rm -rf ddir1 ddir2 ddir3 ddir4 || framework_failure
+# test recursive in place
+"${ZUPDATE}" -N -0 -r --format=gz tmp2 || test_failed $LINENO
+[ -e tmp2/tmp3/a.bz2 ] || test_failed $LINENO
+[ ! -e tmp2/tmp3/a.gz ] || test_failed $LINENO
+[ -e tmp2/tmp3/a.lz ] || test_failed $LINENO
+rm -f tmp2/tmp3/a.lz || framework_failure
+"${ZUPDATE}" -N -0 -r --format=bz2 tmp2 || test_failed $LINENO
+[ ! -e tmp2/tmp3/a.bz2 ] || test_failed $LINENO
+[ ! -e tmp2/tmp3/a.gz ] || test_failed $LINENO
+[ -e tmp2/tmp3/a.lz ] || test_failed $LINENO
+rm -f tmp2/tmp3/a.lz || framework_failure
+cat in.bz2 > tmp2/tmp3/a.bz2 || framework_failure
+cat in.gz > tmp2/tmp3/a.gz || framework_failure
+cd tmp2 || framework_failure
+"${ZUPDATE}" -N -0 -r -k -f . || test_failed $LINENO
+[ -e tmp3/a.bz2 ] || test_failed $LINENO
+[ -e tmp3/a.gz ] || test_failed $LINENO
+[ -e tmp3/a.lz ] || test_failed $LINENO
+rm -f tmp3/a.lz || framework_failure
+"${ZUPDATE}" -N -0 -r -k -f || test_failed $LINENO
+[ -e tmp3/a.bz2 ] || test_failed $LINENO
+[ -e tmp3/a.gz ] || test_failed $LINENO
+[ -e tmp3/a.lz ] || test_failed $LINENO
+rm -f tmp3/a.lz || framework_failure
+"${ZUPDATE}" -N -0 -R -k -f . || test_failed $LINENO
+[ -e tmp3/a.bz2 ] || test_failed $LINENO
+[ -e tmp3/a.gz ] || test_failed $LINENO
+[ -e tmp3/a.lz ] || test_failed $LINENO
+rm -f tmp3/a.lz || framework_failure
+"${ZUPDATE}" -N -0 -R -k -f || test_failed $LINENO
+[ -e tmp3/a.bz2 ] || test_failed $LINENO
+[ -e tmp3/a.gz ] || test_failed $LINENO
+[ -e tmp3/a.lz ] || test_failed $LINENO
+rm -f tmp3/a.lz || framework_failure
+"${ZUPDATE}" -N -0 -r -f . || test_failed $LINENO
+[ ! -e tmp3/a.bz2 ] || test_failed $LINENO
+[ ! -e tmp3/a.gz ] || test_failed $LINENO
+[ -e tmp3/a.lz ] || test_failed $LINENO
+cd .. || framework_failure
+rm -r tmp2 || framework_failure
+
+if ln -s '.' slink 2> /dev/null ; then
+	"${ZCAT}" -N -r slink > /dev/null || test_failed $LINENO
+	"${ZGREP}" -N -r "GNU" slink > /dev/null || test_failed $LINENO
+	"${ZTEST}" -N -r slink || test_failed $LINENO
+	"${ZUPDATE}" -N -r -f slink || test_failed $LINENO
+else
+	printf "\nwarning: skipping link test: 'ln' does not work on your system."
+fi
+rm -f slink || framework_failure
+
+echo
+if [ ${fail} = 0 ] ; then
+	echo "tests completed successfully."
+	cd "${objdir}" && rm -r tmp
+else
+	echo "tests failed."
+fi
+exit ${fail}
diff --git a/testsuite/test.txt b/testsuite/test.txt
new file mode 100644
index 0000000..9196a3a
--- /dev/null
+++ b/testsuite/test.txt
@@ -0,0 +1,676 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
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+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
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+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
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+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
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+
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+
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
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+a notice placed by the copyright holder saying it may be distributed
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+You may charge a fee for the physical act of transferring a copy, and
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+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) <year>  <name of author>
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) <year>  <name of author>
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/testsuite/test.txt.tar b/testsuite/test.txt.tar
new file mode 100644
index 0000000..92d6f1b
--- /dev/null
+++ b/testsuite/test.txt.tar
diff --git a/testsuite/test_bad_crc.lz b/testsuite/test_bad_crc.lz
new file mode 100644
index 0000000..c7d5bc9
--- /dev/null
+++ b/testsuite/test_bad_crc.lz
diff --git a/testsuite/zcat_vs.dat b/testsuite/zcat_vs.dat
new file mode 100644
index 0000000..42333e8
--- /dev/null
+++ b/testsuite/zcat_vs.dat
@@ -0,0 +1,68 @@
+Worst case test file for zcat -vs.
+First 4096 input bytes produce 4095 output bytes because of -s.
+Next 4096 input bytes produce 16384 output bytes, accumulating a total
+of 20479 bytes (5 * 4096 - 1) in the output buffer.
+-------------------------------
+
+
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
+...............................................................
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diff --git a/testsuite/zero_bad_crc.gz b/testsuite/zero_bad_crc.gz
new file mode 100644
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new file mode 100644
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