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diff --git a/src/grp-journal/libjournal-core/test-compress.c b/src/grp-journal/libjournal-core/test-compress.c
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+++ b/src/grp-journal/libjournal-core/test-compress.c
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+/***
+ This file is part of systemd
+
+ Copyright 2014 Ronny Chevalier
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifdef HAVE_LZ4
+#include <lz4.h>
+#endif
+
+#include "alloc-util.h"
+#include "compress.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "macro.h"
+#include "random-util.h"
+#include "util.h"
+
+#ifdef HAVE_XZ
+# define XZ_OK 0
+#else
+# define XZ_OK -EPROTONOSUPPORT
+#endif
+
+#ifdef HAVE_LZ4
+# define LZ4_OK 0
+#else
+# define LZ4_OK -EPROTONOSUPPORT
+#endif
+
+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);
+
+static void test_compress_decompress(int 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 */",
+ object_compressed_to_string(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);
+}
+
+static void test_decompress_startswith(int 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*/",
+ object_compressed_to_string(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);
+}
+
+static void test_compress_stream(int compression,
+ const char* cat,
+ compress_stream_t compress,
+ decompress_stream_t decompress,
+ const char *srcfile) {
+
+ _cleanup_close_ int src = -1, dst = -1, dst2 = -1;
+ char pattern[] = "/tmp/systemd-test.compressed.XXXXXX",
+ pattern2[] = "/tmp/systemd-test.compressed.XXXXXX";
+ int r;
+ _cleanup_free_ char *cmd = NULL, *cmd2;
+ struct stat st = {};
+
+ log_debug("/* testing %s compression */",
+ object_compressed_to_string(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, O_RDWR|O_CLOEXEC)) >= 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, O_RDWR|O_CLOEXEC)) >= 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(r == -EBADMSG || r == 0);
+
+ 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);
+
+ assert_se(unlink(pattern) == 0);
+ assert_se(unlink(pattern2) == 0);
+}
+
+#ifdef HAVE_LZ4
+static void test_lz4_decompress_partial(void) {
+ char buf[20000];
+ size_t buf_size = sizeof(buf), compressed;
+ int r;
+ _cleanup_free_ char *huge = NULL;
+
+#define HUGE_SIZE (4096*1024)
+ huge = malloc(HUGE_SIZE);
+ memset(huge, 'x', HUGE_SIZE);
+ memcpy(huge, "HUGE=", 5);
+
+ r = LZ4_compress_limitedOutput(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);
+
+ /* We expect this to fail, because that's how current lz4 works. If this
+ * call succeeds, then lz4 has been fixed, and we need to change our code.
+ */
+ r = LZ4_decompress_safe_partial(buf, huge,
+ compressed,
+ 12, HUGE_SIZE-1);
+ assert_se(r < 0);
+ log_info("Decompressed partial %i/%i → %i", 12, HUGE_SIZE-1, r);
+}
+#endif
+
+int main(int argc, char *argv[]) {
+ const char text[] =
+ "text\0foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
+ "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";
+
+ char data[512] = "random\0";
+
+ char huge[4096*1024];
+ memset(huge, 'x', sizeof(huge));
+ memcpy(huge, "HUGE=", 5);
+ char_array_0(huge);
+
+ log_set_max_level(LOG_DEBUG);
+
+ random_bytes(data + 7, sizeof(data) - 7);
+
+#ifdef HAVE_XZ
+ test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz,
+ text, sizeof(text), false);
+ test_compress_decompress(OBJECT_COMPRESSED_XZ, compress_blob_xz, decompress_blob_xz,
+ data, sizeof(data), true);
+
+ test_decompress_startswith(OBJECT_COMPRESSED_XZ,
+ compress_blob_xz, decompress_startswith_xz,
+ text, sizeof(text), false);
+ test_decompress_startswith(OBJECT_COMPRESSED_XZ,
+ compress_blob_xz, decompress_startswith_xz,
+ data, sizeof(data), true);
+ test_decompress_startswith(OBJECT_COMPRESSED_XZ,
+ compress_blob_xz, decompress_startswith_xz,
+ huge, sizeof(huge), true);
+
+ test_compress_stream(OBJECT_COMPRESSED_XZ, "xzcat",
+ compress_stream_xz, decompress_stream_xz, argv[0]);
+#else
+ log_info("/* XZ test skipped */");
+#endif
+
+#ifdef HAVE_LZ4
+ test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4,
+ text, sizeof(text), false);
+ test_compress_decompress(OBJECT_COMPRESSED_LZ4, compress_blob_lz4, decompress_blob_lz4,
+ data, sizeof(data), true);
+
+ test_decompress_startswith(OBJECT_COMPRESSED_LZ4,
+ compress_blob_lz4, decompress_startswith_lz4,
+ text, sizeof(text), false);
+ test_decompress_startswith(OBJECT_COMPRESSED_LZ4,
+ compress_blob_lz4, decompress_startswith_lz4,
+ data, sizeof(data), true);
+ test_decompress_startswith(OBJECT_COMPRESSED_LZ4,
+ compress_blob_lz4, decompress_startswith_lz4,
+ huge, sizeof(huge), true);
+
+ test_compress_stream(OBJECT_COMPRESSED_LZ4, "lz4cat",
+ compress_stream_lz4, decompress_stream_lz4, argv[0]);
+
+ test_lz4_decompress_partial();
+#else
+ log_info("/* LZ4 test skipped */");
+#endif
+
+ return 0;
+}