[thirdparty/systemd.git] / src / journal / test-compress.c

/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include <sys/stat.h>

#if HAVE_LZ4
#include <lz4.h>
#endif

#include "alloc-util.h"
#include "compress.h"
#include "fd-util.h"
#include "fs-util.h"
#include "macro.h"
#include "memory-util.h"
#include "path-util.h"
#include "random-util.h"
#include "tests.h"
#include "tmpfile-util.h"

#if HAVE_XZ
# define XZ_OK 0
#else
# define XZ_OK -EPROTONOSUPPORT
#endif

#if HAVE_LZ4
# define LZ4_OK 0
#else
# define LZ4_OK -EPROTONOSUPPORT
#endif

#define HUGE_SIZE (4096*1024)

typedef int (compress_blob_t)(const void *src, uint64_t src_size,
                              void *dst, size_t dst_alloc_size, size_t *dst_size);
typedef int (decompress_blob_t)(const void *src, uint64_t src_size,
                                void **dst, size_t *dst_alloc_size,
                                size_t* dst_size, size_t dst_max);
typedef int (decompress_sw_t)(const void *src, uint64_t src_size,
                              void **buffer, size_t *buffer_size,
                              const void *prefix, size_t prefix_len,
                              uint8_t extra);

typedef int (compress_stream_t)(int fdf, int fdt, uint64_t max_bytes);
typedef int (decompress_stream_t)(int fdf, int fdt, uint64_t max_size);

#if HAVE_COMPRESSION
_unused_ static void test_compress_decompress(const char *compression,
                                              compress_blob_t compress,
                                              decompress_blob_t decompress,
                                              const char *data,
                                              size_t data_len,
                                              bool may_fail) {
        char compressed[512];
        size_t csize, usize = 0;
        _cleanup_free_ char *decompressed = NULL;
        int r;

        log_info("/* testing %s %s blob compression/decompression */",
                 compression, data);

        r = compress(data, data_len, compressed, sizeof(compressed), &csize);
        if (r == -ENOBUFS) {
                log_info_errno(r, "compression failed: %m");
                assert_se(may_fail);
        } else {
                assert_se(r == 0);
                r = decompress(compressed, csize,
                               (void **) &decompressed, &usize, &csize, 0);
                assert_se(r == 0);
                assert_se(decompressed);
                assert_se(memcmp(decompressed, data, data_len) == 0);
        }

        r = decompress("garbage", 7,
                       (void **) &decompressed, &usize, &csize, 0);
        assert_se(r < 0);

        /* make sure to have the minimal lz4 compressed size */
        r = decompress("00000000\1g", 9,
                       (void **) &decompressed, &usize, &csize, 0);
        assert_se(r < 0);

        r = decompress("\100000000g", 9,
                       (void **) &decompressed, &usize, &csize, 0);
        assert_se(r < 0);

        memzero(decompressed, usize);
}

_unused_ static void test_decompress_startswith(const char *compression,
                                                compress_blob_t compress,
                                                decompress_sw_t decompress_sw,
                                                const char *data,
                                                size_t data_len,
                                                bool may_fail) {

        char *compressed;
        _cleanup_free_ char *compressed1 = NULL, *compressed2 = NULL, *decompressed = NULL;
        size_t csize, usize = 0, len;
        int r;

        log_info("/* testing decompress_startswith with %s on %.20s text */",
                 compression, data);

#define BUFSIZE_1 512
#define BUFSIZE_2 20000

        compressed = compressed1 = malloc(BUFSIZE_1);
        assert_se(compressed1);
        r = compress(data, data_len, compressed, BUFSIZE_1, &csize);
        if (r == -ENOBUFS) {
                log_info_errno(r, "compression failed: %m");
                assert_se(may_fail);

                compressed = compressed2 = malloc(BUFSIZE_2);
                assert_se(compressed2);
                r = compress(data, data_len, compressed, BUFSIZE_2, &csize);
                assert(r == 0);
        }
        assert_se(r == 0);

        len = strlen(data);

        r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len, '\0');
        assert_se(r > 0);
        r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len, 'w');
        assert_se(r == 0);
        r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, "barbarbar", 9, ' ');
        assert_se(r == 0);
        r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len - 1, data[len-1]);
        assert_se(r > 0);
        r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len - 1, 'w');
        assert_se(r == 0);
        r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len, '\0');
        assert_se(r > 0);
}

_unused_ static void test_decompress_startswith_short(const char *compression,
                                                      compress_blob_t compress,
                                                      decompress_sw_t decompress_sw) {

#define TEXT "HUGE=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

        char buf[1024];
        size_t i, csize;
        int r;

        log_info("/* %s with %s */", __func__, compression);

        r = compress(TEXT, sizeof TEXT, buf, sizeof buf, &csize);
        assert_se(r == 0);

        for (i = 1; i < strlen(TEXT); i++) {
                size_t alloc_size = i;
                _cleanup_free_ void *buf2 = NULL;

                assert_se(buf2 = malloc(i));

                assert_se(decompress_sw(buf, csize, &buf2, &alloc_size, TEXT, i, TEXT[i]) == 1);
                assert_se(decompress_sw(buf, csize, &buf2, &alloc_size, TEXT, i, 'y') == 0);
        }
}

_unused_ static void test_compress_stream(const char *compression,
                                          const char *cat,
                                          compress_stream_t compress,
                                          decompress_stream_t decompress,
                                          const char *srcfile) {

        _cleanup_close_ int src = -1, dst = -1, dst2 = -1;
        _cleanup_(unlink_tempfilep) char
                pattern[] = "/tmp/systemd-test.compressed.XXXXXX",
                pattern2[] = "/tmp/systemd-test.compressed.XXXXXX";
        int r;
        _cleanup_free_ char *cmd = NULL, *cmd2 = NULL;
        struct stat st = {};

        r = find_executable(cat, NULL);
        if (r < 0) {
                log_error_errno(r, "Skipping %s, could not find %s binary: %m", __func__, cat);
                return;
        }

        log_debug("/* testing %s compression */", compression);

        log_debug("/* create source from %s */", srcfile);

        assert_se((src = open(srcfile, O_RDONLY|O_CLOEXEC)) >= 0);

        log_debug("/* test compression */");

        assert_se((dst = mkostemp_safe(pattern)) >= 0);

        assert_se(compress(src, dst, -1) == 0);

        if (cat) {
                assert_se(asprintf(&cmd, "%s %s | diff %s -", cat, pattern, srcfile) > 0);
                assert_se(system(cmd) == 0);
        }

        log_debug("/* test decompression */");

        assert_se((dst2 = mkostemp_safe(pattern2)) >= 0);

        assert_se(stat(srcfile, &st) == 0);

        assert_se(lseek(dst, 0, SEEK_SET) == 0);
        r = decompress(dst, dst2, st.st_size);
        assert_se(r == 0);

        assert_se(asprintf(&cmd2, "diff %s %s", srcfile, pattern2) > 0);
        assert_se(system(cmd2) == 0);

        log_debug("/* test faulty decompression */");

        assert_se(lseek(dst, 1, SEEK_SET) == 1);
        r = decompress(dst, dst2, st.st_size);
        assert_se(IN_SET(r, 0, -EBADMSG));

        assert_se(lseek(dst, 0, SEEK_SET) == 0);
        assert_se(lseek(dst2, 0, SEEK_SET) == 0);
        r = decompress(dst, dst2, st.st_size - 1);
        assert_se(r == -EFBIG);
}
#endif

#if HAVE_LZ4
static void test_lz4_decompress_partial(void) {
        char buf[20000], buf2[100];
        size_t buf_size = sizeof(buf), compressed;
        int r;
        _cleanup_free_ char *huge = NULL;

        log_debug("/* %s */", __func__);

        assert_se(huge = malloc(HUGE_SIZE));
        memcpy(huge, "HUGE=", STRLEN("HUGE="));
        memset(&huge[STRLEN("HUGE=")], 'x', HUGE_SIZE - STRLEN("HUGE=") - 1);
        huge[HUGE_SIZE - 1] = '\0';

        r = LZ4_compress_default(huge, buf, HUGE_SIZE, buf_size);
        assert_se(r >= 0);
        compressed = r;
        log_info("Compressed %i → %zu", HUGE_SIZE, compressed);

        r = LZ4_decompress_safe(buf, huge, r, HUGE_SIZE);
        assert_se(r >= 0);
        log_info("Decompressed → %i", r);

        r = LZ4_decompress_safe_partial(buf, huge,
                                        compressed,
                                        12, HUGE_SIZE);
        assert_se(r >= 0);
        log_info("Decompressed partial %i/%i → %i", 12, HUGE_SIZE, r);

        for (size_t size = 1; size < sizeof(buf2); size++) {
                /* This failed in older lz4s but works in newer ones. */
                r = LZ4_decompress_safe_partial(buf, buf2, compressed, size, size);
                log_info("Decompressed partial %zu/%zu → %i (%s)", size, size, r,
                                                                   r < 0 ? "bad" : "good");
                if (r >= 0 && LZ4_versionNumber() >= 10803)
                        /* lz4 <= 1.8.2 should fail that test, let's only check for newer ones */
                        assert_se(memcmp(buf2, huge, r) == 0);
        }
}
#endif

int main(int argc, char *argv[]) {
#if HAVE_COMPRESSION
        _unused_ const char text[] =
                "text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
                "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";

        /* The file to test compression on can be specified as the first argument */
        const char *srcfile = argc > 1 ? argv[1] : argv[0];

        char data[512] = "random\0";

        _cleanup_free_ char *huge = NULL;

        assert_se(huge = malloc(HUGE_SIZE));
        memcpy(huge, "HUGE=", STRLEN("HUGE="));
        memset(&huge[STRLEN("HUGE=")], 'x', HUGE_SIZE - STRLEN("HUGE=") - 1);
        huge[HUGE_SIZE - 1] = '\0';

        test_setup_logging(LOG_DEBUG);

        random_bytes(data + 7, sizeof(data) - 7);

#if HAVE_XZ
        test_compress_decompress("XZ", compress_blob_xz, decompress_blob_xz,
                                 text, sizeof(text), false);
        test_compress_decompress("XZ", compress_blob_xz, decompress_blob_xz,
                                 data, sizeof(data), true);

        test_decompress_startswith("XZ",
                                   compress_blob_xz, decompress_startswith_xz,
                                   text, sizeof(text), false);
        test_decompress_startswith("XZ",
                                   compress_blob_xz, decompress_startswith_xz,
                                   data, sizeof(data), true);
        test_decompress_startswith("XZ",
                                   compress_blob_xz, decompress_startswith_xz,
                                   huge, HUGE_SIZE, true);

        test_compress_stream("XZ", "xzcat",
                             compress_stream_xz, decompress_stream_xz, srcfile);

        test_decompress_startswith_short("XZ", compress_blob_xz, decompress_startswith_xz);

#else
        log_info("/* XZ test skipped */");
#endif

#if HAVE_LZ4
        test_compress_decompress("LZ4", compress_blob_lz4, decompress_blob_lz4,
                                 text, sizeof(text), false);
        test_compress_decompress("LZ4", compress_blob_lz4, decompress_blob_lz4,
                                 data, sizeof(data), true);

        test_decompress_startswith("LZ4",
                                   compress_blob_lz4, decompress_startswith_lz4,
                                   text, sizeof(text), false);
        test_decompress_startswith("LZ4",
                                   compress_blob_lz4, decompress_startswith_lz4,
                                   data, sizeof(data), true);
        test_decompress_startswith("LZ4",
                                   compress_blob_lz4, decompress_startswith_lz4,
                                   huge, HUGE_SIZE, true);

        test_compress_stream("LZ4", "lz4cat",
                             compress_stream_lz4, decompress_stream_lz4, srcfile);

        test_lz4_decompress_partial();

        test_decompress_startswith_short("LZ4", compress_blob_lz4, decompress_startswith_lz4);

#else
        log_info("/* LZ4 test skipped */");
#endif

#if HAVE_ZSTD
        test_compress_decompress("ZSTD", compress_blob_zstd, decompress_blob_zstd,
                                 text, sizeof(text), false);
        test_compress_decompress("ZSTD", compress_blob_zstd, decompress_blob_zstd,
                                 data, sizeof(data), true);

        test_decompress_startswith("ZSTD",
                                   compress_blob_zstd, decompress_startswith_zstd,
                                   text, sizeof(text), false);
        test_decompress_startswith("ZSTD",
                                   compress_blob_zstd, decompress_startswith_zstd,
                                   data, sizeof(data), true);
        test_decompress_startswith("ZSTD",
                                   compress_blob_zstd, decompress_startswith_zstd,
                                   huge, HUGE_SIZE, true);

        test_compress_stream("ZSTD", "zstdcat",
                             compress_stream_zstd, decompress_stream_zstd, srcfile);

        test_decompress_startswith_short("ZSTD", compress_blob_zstd, decompress_startswith_zstd);
#else
        log_info("/* ZSTD test skipped */");
#endif

        return 0;
#else
        log_info("/* XZ, LZ4 and ZSTD tests skipped */");
        return EXIT_TEST_SKIP;
#endif
}
Commit	Line	Data
db9ecf05	1	/* SPDX-License-Identifier: LGPL-2.1-or-later */
843fecc0	2
ca78ad1d ZJS	3	#include <sys/stat.h>
ca78ad1d ZJS	4
349cc4a5	5	#if HAVE_LZ4
e3cc7fc4 ZJS	6	#include <lz4.h>
	7	#endif
	8
b5efdb8a	9	#include "alloc-util.h"
843fecc0	10	#include "compress.h"
3ffd4af2	11	#include "fd-util.h"
627d2bac	12	#include "fs-util.h"
843fecc0	13	#include "macro.h"
0a970718	14	#include "memory-util.h"
69847060	15	#include "path-util.h"
3df3e884	16	#include "random-util.h"
6d7c4033	17	#include "tests.h"
e4de7287	18	#include "tmpfile-util.h"
843fecc0	19
349cc4a5	20	#if HAVE_XZ
d89c8fdf ZJS	21	# define XZ_OK 0
	22	#else
	23	# define XZ_OK -EPROTONOSUPPORT
	24	#endif
	25
349cc4a5	26	#if HAVE_LZ4
d89c8fdf ZJS	27	# define LZ4_OK 0
	28	#else
	29	# define LZ4_OK -EPROTONOSUPPORT
	30	#endif
	31
2e408606 MK	32	#define HUGE_SIZE (4096*1024)
2e408606 MK	33
d89c8fdf	34	typedef int (compress_blob_t)(const void *src, uint64_t src_size,
5d6f46b6	35	void dst, size_t dst_alloc_size, size_t dst_size);
d89c8fdf	36	typedef int (decompress_blob_t)(const void *src, uint64_t src_size,
fa1c4b51 ZJS	37	void *dst, size_t dst_alloc_size,
fa1c4b51 ZJS	38	size_t* dst_size, size_t dst_max);
d89c8fdf	39	typedef int (decompress_sw_t)(const void *src, uint64_t src_size,
fa1c4b51 ZJS	40	void *buffer, size_t buffer_size,
fa1c4b51 ZJS	41	const void *prefix, size_t prefix_len,
d89c8fdf ZJS	42	uint8_t extra);
d89c8fdf ZJS	43
59f448cf LP	44	typedef int (compress_stream_t)(int fdf, int fdt, uint64_t max_bytes);
59f448cf LP	45	typedef int (decompress_stream_t)(int fdf, int fdt, uint64_t max_size);
d89c8fdf	46
d80b051c	47	#if HAVE_COMPRESSION
ef5924aa NL	48	_unused_ static void test_compress_decompress(const char *compression,
	49	compress_blob_t compress,
	50	decompress_blob_t decompress,
	51	const char *data,
	52	size_t data_len,
	53	bool may_fail) {
843fecc0	54	char compressed[512];
5d6f46b6	55	size_t csize, usize = 0;
d89c8fdf ZJS	56	_cleanup_free_ char *decompressed = NULL;
	57	int r;
	58
c552d602	59	log_info("/* testing %s %s blob compression/decompression */",
ef5924aa	60	compression, data);
c552d602	61
5d6f46b6	62	r = compress(data, data_len, compressed, sizeof(compressed), &csize);
c552d602	63	if (r == -ENOBUFS) {
da927ba9	64	log_info_errno(r, "compression failed: %m");
787784c4	65	assert_se(may_fail);
c552d602	66	} else {
787784c4	67	assert_se(r == 0);
c552d602 ZJS	68	r = decompress(compressed, csize,
c552d602 ZJS	69	(void **) &decompressed, &usize, &csize, 0);
787784c4	70	assert_se(r == 0);
c552d602 ZJS	71	assert_se(decompressed);
	72	assert_se(memcmp(decompressed, data, data_len) == 0);
	73	}
d89c8fdf ZJS	74
	75	r = decompress("garbage", 7,
	76	(void **) &decompressed, &usize, &csize, 0);
787784c4	77	assert_se(r < 0);
d89c8fdf ZJS	78
	79	/* make sure to have the minimal lz4 compressed size */
	80	r = decompress("00000000\1g", 9,
	81	(void **) &decompressed, &usize, &csize, 0);
787784c4	82	assert_se(r < 0);
d89c8fdf ZJS	83
	84	r = decompress("\100000000g", 9,
	85	(void **) &decompressed, &usize, &csize, 0);
787784c4	86	assert_se(r < 0);
d89c8fdf ZJS	87
d89c8fdf ZJS	88	memzero(decompressed, usize);
843fecc0 RC	89	}
843fecc0 RC	90
ef5924aa NL	91	_unused_ static void test_decompress_startswith(const char *compression,
	92	compress_blob_t compress,
	93	decompress_sw_t decompress_sw,
	94	const char *data,
	95	size_t data_len,
	96	bool may_fail) {
d89c8fdf	97
ae5e1b19 ZJS	98	char *compressed;
	99	_cleanup_free_ char compressed1 = NULL, compressed2 = NULL, *decompressed = NULL;
	100	size_t csize, usize = 0, len;
c552d602	101	int r;
d89c8fdf	102
13e785f7	103	log_info("/* testing decompress_startswith with %s on %.20s text */",
ef5924aa	104	compression, data);
c552d602	105
ae5e1b19 ZJS	106	#define BUFSIZE_1 512
	107	#define BUFSIZE_2 20000
	108
	109	compressed = compressed1 = malloc(BUFSIZE_1);
	110	assert_se(compressed1);
	111	r = compress(data, data_len, compressed, BUFSIZE_1, &csize);
c552d602	112	if (r == -ENOBUFS) {
da927ba9	113	log_info_errno(r, "compression failed: %m");
787784c4	114	assert_se(may_fail);
ae5e1b19 ZJS	115
	116	compressed = compressed2 = malloc(BUFSIZE_2);
	117	assert_se(compressed2);
	118	r = compress(data, data_len, compressed, BUFSIZE_2, &csize);
	119	assert(r == 0);
c552d602	120	}
787784c4	121	assert_se(r == 0);
d89c8fdf	122
ae5e1b19 ZJS	123	len = strlen(data);
	124
	125	r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len, '\0');
	126	assert_se(r > 0);
	127	r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len, 'w');
	128	assert_se(r == 0);
	129	r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, "barbarbar", 9, ' ');
	130	assert_se(r == 0);
	131	r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len - 1, data[len-1]);
	132	assert_se(r > 0);
	133	r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len - 1, 'w');
	134	assert_se(r == 0);
	135	r = decompress_sw(compressed, csize, (void **) &decompressed, &usize, data, len, '\0');
	136	assert_se(r > 0);
843fecc0 RC	137	}
843fecc0 RC	138
ef5924aa NL	139	_unused_ static void test_decompress_startswith_short(const char *compression,
	140	compress_blob_t compress,
	141	decompress_sw_t decompress_sw) {
ba17efce ZJS	142
	143	#define TEXT "HUGE=xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
	144
	145	char buf[1024];
	146	size_t i, csize;
	147	int r;
	148
ef5924aa	149	log_info("/* %s with %s */", __func__, compression);
ba17efce ZJS	150
	151	r = compress(TEXT, sizeof TEXT, buf, sizeof buf, &csize);
	152	assert_se(r == 0);
	153
	154	for (i = 1; i < strlen(TEXT); i++) {
	155	size_t alloc_size = i;
	156	_cleanup_free_ void *buf2 = NULL;
	157
	158	assert_se(buf2 = malloc(i));
	159
	160	assert_se(decompress_sw(buf, csize, &buf2, &alloc_size, TEXT, i, TEXT[i]) == 1);
	161	assert_se(decompress_sw(buf, csize, &buf2, &alloc_size, TEXT, i, 'y') == 0);
	162	}
	163	}
	164
ef5924aa NL	165	_unused_ static void test_compress_stream(const char *compression,
	166	const char *cat,
	167	compress_stream_t compress,
	168	decompress_stream_t decompress,
	169	const char *srcfile) {
d89c8fdf	170
355b59e2	171	_cleanup_close_ int src = -1, dst = -1, dst2 = -1;
627d2bac ZJS	172	_cleanup_(unlink_tempfilep) char
	173	pattern[] = "/tmp/systemd-test.compressed.XXXXXX",
	174	pattern2[] = "/tmp/systemd-test.compressed.XXXXXX";
355b59e2	175	int r;
69847060	176	_cleanup_free_ char cmd = NULL, cmd2 = NULL;
355b59e2 ZJS	177	struct stat st = {};
355b59e2 ZJS	178
f7bc0c32	179	r = find_executable(cat, NULL);
69847060 LP	180	if (r < 0) {
	181	log_error_errno(r, "Skipping %s, could not find %s binary: %m", __func__, cat);
	182	return;
	183	}
	184
ef5924aa	185	log_debug("/* testing %s compression */", compression);
d89c8fdf	186
355b59e2 ZJS	187	log_debug("/* create source from %s */", srcfile);
	188
	189	assert_se((src = open(srcfile, O_RDONLY\|O_CLOEXEC)) >= 0);
	190
	191	log_debug("/* test compression */");
	192
646853bd	193	assert_se((dst = mkostemp_safe(pattern)) >= 0);
355b59e2	194
52754725	195	assert_se(compress(src, dst, -1) == 0);
355b59e2	196
d89c8fdf ZJS	197	if (cat) {
d89c8fdf ZJS	198	assert_se(asprintf(&cmd, "%s %s \| diff %s -", cat, pattern, srcfile) > 0);
52754725	199	assert_se(system(cmd) == 0);
d89c8fdf	200	}
355b59e2 ZJS	201
	202	log_debug("/* test decompression */");
	203
646853bd	204	assert_se((dst2 = mkostemp_safe(pattern2)) >= 0);
355b59e2 ZJS	205
	206	assert_se(stat(srcfile, &st) == 0);
	207
	208	assert_se(lseek(dst, 0, SEEK_SET) == 0);
d89c8fdf	209	r = decompress(dst, dst2, st.st_size);
0c0cdb06	210	assert_se(r == 0);
355b59e2 ZJS	211
	212	assert_se(asprintf(&cmd2, "diff %s %s", srcfile, pattern2) > 0);
	213	assert_se(system(cmd2) == 0);
	214
	215	log_debug("/* test faulty decompression */");
	216
	217	assert_se(lseek(dst, 1, SEEK_SET) == 1);
d89c8fdf	218	r = decompress(dst, dst2, st.st_size);
4c701096	219	assert_se(IN_SET(r, 0, -EBADMSG));
355b59e2 ZJS	220
	221	assert_se(lseek(dst, 0, SEEK_SET) == 0);
	222	assert_se(lseek(dst2, 0, SEEK_SET) == 0);
d89c8fdf	223	r = decompress(dst, dst2, st.st_size - 1);
0c0cdb06	224	assert_se(r == -EFBIG);
355b59e2	225	}
ccc717fa	226	#endif
355b59e2	227
349cc4a5	228	#if HAVE_LZ4
e3cc7fc4	229	static void test_lz4_decompress_partial(void) {
e41ef6fd	230	char buf[20000], buf2[100];
e3cc7fc4 ZJS	231	size_t buf_size = sizeof(buf), compressed;
e3cc7fc4 ZJS	232	int r;
ae5e1b19	233	_cleanup_free_ char *huge = NULL;
e3cc7fc4	234
e4a321fc ZJS	235	log_debug("/* %s */", __func__);
e4a321fc ZJS	236
e41ef6fd	237	assert_se(huge = malloc(HUGE_SIZE));
3c14dc61 TM	238	memcpy(huge, "HUGE=", STRLEN("HUGE="));
	239	memset(&huge[STRLEN("HUGE=")], 'x', HUGE_SIZE - STRLEN("HUGE=") - 1);
	240	huge[HUGE_SIZE - 1] = '\0';
e3cc7fc4	241
777fe71f	242	r = LZ4_compress_default(huge, buf, HUGE_SIZE, buf_size);
e3cc7fc4 ZJS	243	assert_se(r >= 0);
e3cc7fc4 ZJS	244	compressed = r;
ae5e1b19	245	log_info("Compressed %i → %zu", HUGE_SIZE, compressed);
e3cc7fc4	246
ae5e1b19	247	r = LZ4_decompress_safe(buf, huge, r, HUGE_SIZE);
e3cc7fc4 ZJS	248	assert_se(r >= 0);
	249	log_info("Decompressed → %i", r);
	250
	251	r = LZ4_decompress_safe_partial(buf, huge,
	252	compressed,
ae5e1b19	253	12, HUGE_SIZE);
e3cc7fc4	254	assert_se(r >= 0);
ae5e1b19	255	log_info("Decompressed partial %i/%i → %i", 12, HUGE_SIZE, r);
e3cc7fc4	256
e41ef6fd ZJS	257	for (size_t size = 1; size < sizeof(buf2); size++) {
	258	/* This failed in older lz4s but works in newer ones. */
	259	r = LZ4_decompress_safe_partial(buf, buf2, compressed, size, size);
	260	log_info("Decompressed partial %zu/%zu → %i (%s)", size, size, r,
	261	r < 0 ? "bad" : "good");
	262	if (r >= 0 && LZ4_versionNumber() >= 10803)
	263	/* lz4 <= 1.8.2 should fail that test, let's only check for newer ones */
	264	assert_se(memcmp(buf2, huge, r) == 0);
	265	}
e3cc7fc4 ZJS	266	}
	267	#endif
	268
843fecc0	269	int main(int argc, char *argv[]) {
d80b051c	270	#if HAVE_COMPRESSION
ef5924aa	271	_unused_ const char text[] =
c552d602 ZJS	272	"text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
	273	"foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";
	274
3e216115 ZJS	275	/* The file to test compression on can be specified as the first argument */
	276	const char *srcfile = argc > 1 ? argv[1] : argv[0];
	277
c552d602	278	char data[512] = "random\0";
355b59e2	279
3c14dc61 TM	280	_cleanup_free_ char *huge = NULL;
	281
	282	assert_se(huge = malloc(HUGE_SIZE));
	283	memcpy(huge, "HUGE=", STRLEN("HUGE="));
	284	memset(&huge[STRLEN("HUGE=")], 'x', HUGE_SIZE - STRLEN("HUGE=") - 1);
	285	huge[HUGE_SIZE - 1] = '\0';
ae5e1b19	286
6d7c4033	287	test_setup_logging(LOG_DEBUG);
355b59e2	288
c552d602 ZJS	289	random_bytes(data + 7, sizeof(data) - 7);
c552d602 ZJS	290
349cc4a5	291	#if HAVE_XZ
ef5924aa	292	test_compress_decompress("XZ", compress_blob_xz, decompress_blob_xz,
c552d602	293	text, sizeof(text), false);
ef5924aa	294	test_compress_decompress("XZ", compress_blob_xz, decompress_blob_xz,
c552d602	295	data, sizeof(data), true);
ae5e1b19	296
ef5924aa	297	test_decompress_startswith("XZ",
c552d602 ZJS	298	compress_blob_xz, decompress_startswith_xz,
c552d602 ZJS	299	text, sizeof(text), false);
ef5924aa	300	test_decompress_startswith("XZ",
c552d602 ZJS	301	compress_blob_xz, decompress_startswith_xz,
c552d602 ZJS	302	data, sizeof(data), true);
ef5924aa	303	test_decompress_startswith("XZ",
ae5e1b19	304	compress_blob_xz, decompress_startswith_xz,
3c14dc61	305	huge, HUGE_SIZE, true);
ae5e1b19	306
ef5924aa	307	test_compress_stream("XZ", "xzcat",
3e216115	308	compress_stream_xz, decompress_stream_xz, srcfile);
ba17efce	309
ef5924aa	310	test_decompress_startswith_short("XZ", compress_blob_xz, decompress_startswith_xz);
ba17efce	311
d89c8fdf ZJS	312	#else
	313	log_info("/* XZ test skipped */");
	314	#endif
c552d602	315
349cc4a5	316	#if HAVE_LZ4
ef5924aa	317	test_compress_decompress("LZ4", compress_blob_lz4, decompress_blob_lz4,
c552d602	318	text, sizeof(text), false);
ef5924aa	319	test_compress_decompress("LZ4", compress_blob_lz4, decompress_blob_lz4,
c552d602	320	data, sizeof(data), true);
ae5e1b19	321
ef5924aa	322	test_decompress_startswith("LZ4",
c552d602 ZJS	323	compress_blob_lz4, decompress_startswith_lz4,
c552d602 ZJS	324	text, sizeof(text), false);
ef5924aa	325	test_decompress_startswith("LZ4",
c552d602 ZJS	326	compress_blob_lz4, decompress_startswith_lz4,
c552d602 ZJS	327	data, sizeof(data), true);
ef5924aa	328	test_decompress_startswith("LZ4",
ae5e1b19	329	compress_blob_lz4, decompress_startswith_lz4,
3c14dc61	330	huge, HUGE_SIZE, true);
d89c8fdf	331
ef5924aa	332	test_compress_stream("LZ4", "lz4cat",
3e216115	333	compress_stream_lz4, decompress_stream_lz4, srcfile);
e3cc7fc4 ZJS	334
e3cc7fc4 ZJS	335	test_lz4_decompress_partial();
ba17efce	336
ef5924aa	337	test_decompress_startswith_short("LZ4", compress_blob_lz4, decompress_startswith_lz4);
ba17efce	338
d89c8fdf ZJS	339	#else
	340	log_info("/* LZ4 test skipped */");
	341	#endif
843fecc0	342
ef5924aa	343	#if HAVE_ZSTD
8653185a LP	344	test_compress_decompress("ZSTD", compress_blob_zstd, decompress_blob_zstd,
	345	text, sizeof(text), false);
	346	test_compress_decompress("ZSTD", compress_blob_zstd, decompress_blob_zstd,
	347	data, sizeof(data), true);
	348
	349	test_decompress_startswith("ZSTD",
	350	compress_blob_zstd, decompress_startswith_zstd,
	351	text, sizeof(text), false);
	352	test_decompress_startswith("ZSTD",
	353	compress_blob_zstd, decompress_startswith_zstd,
	354	data, sizeof(data), true);
	355	test_decompress_startswith("ZSTD",
	356	compress_blob_zstd, decompress_startswith_zstd,
	357	huge, HUGE_SIZE, true);
	358
ef5924aa NL	359	test_compress_stream("ZSTD", "zstdcat",
ef5924aa NL	360	compress_stream_zstd, decompress_stream_zstd, srcfile);
8653185a LP	361
8653185a LP	362	test_decompress_startswith_short("ZSTD", compress_blob_zstd, decompress_startswith_zstd);
ef5924aa NL	363	#else
	364	log_info("/* ZSTD test skipped */");
	365	#endif
	366
843fecc0	367	return 0;
ccc717fa	368	#else
ef5924aa	369	log_info("/* XZ, LZ4 and ZSTD tests skipped */");
ccc717fa ZJS	370	return EXIT_TEST_SKIP;
ccc717fa ZJS	371	#endif
843fecc0	372	}