src/journal/test-compress.c

   1 /***
   2   This file is part of systemd
   3
   4   Copyright 2014 Ronny Chevalier
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "compress.h"
  21 #include "util.h"
  22 #include "macro.h"
  23
  24 static void test_compress_uncompress(void) {
  25         char text[] = "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
  26                       "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";
  27         char compressed[512];
  28         uint64_t csize = 512;
  29         uint64_t usize = 0;
  30         _cleanup_free_ char *uncompressed = NULL;
  31
  32         assert_se(compress_blob(text, sizeof(text), compressed, &csize));
  33         assert_se(uncompress_blob(compressed,
  34                                   csize,
  35                                   (void **) &uncompressed,
  36                                   &usize, &csize, 0));
  37         assert_se(uncompressed);
  38         assert_se(streq(uncompressed, text));
  39         assert_se(!uncompress_blob("garbage",
  40                                    7,
  41                                    (void **) &uncompressed,
  42                                    &usize, &csize, 0));
  43 }
  44
  45 static void test_uncompress_startswith(void) {
  46         char text[] = "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF"
  47                       "foofoofoofoo AAAA aaaaaaaaa ghost busters barbarbar FFF";
  48         char compressed[512];
  49         uint64_t csize = 512;
  50         uint64_t usize = 0;
  51         _cleanup_free_ char *uncompressed = NULL;
  52
  53         assert_se(compress_blob(text, sizeof(text), compressed, &csize));
  54         assert_se(uncompress_startswith(compressed,
  55                                         csize,
  56                                         (void **) &uncompressed,
  57                                         &usize,
  58                                         "foofoofoofoo", 12, ' '));
  59         assert_se(!uncompress_startswith(compressed,
  60                                          csize,
  61                                         (void **) &uncompressed,
  62                                         &usize,
  63                                         "foofoofoofoo", 12, 'w'));
  64         assert_se(!uncompress_startswith(compressed,
  65                                          csize,
  66                                         (void **) &uncompressed,
  67                                         &usize,
  68                                         "barbarbar", 9, ' '));
  69 }
  70
  71 static void test_compress_stream(const char *srcfile) {
  72         _cleanup_close_ int src = -1, dst = -1, dst2 = -1;
  73         char pattern[] = "/tmp/systemd-test.xz.XXXXXX",
  74              pattern2[] = "/tmp/systemd-test.xz.XXXXXX";
  75         int r;
  76         _cleanup_free_ char *cmd, *cmd2;
  77         struct stat st = {};
  78
  79         log_debug("/* create source from %s */", srcfile);
  80
  81         assert_se((src = open(srcfile, O_RDONLY|O_CLOEXEC)) >= 0);
  82
  83         log_debug("/* test compression */");
  84
  85         assert_se((dst = mkostemp_safe(pattern, O_RDWR|O_CLOEXEC)) >= 0);
  86
  87         r = compress_stream(src, dst, -1);
  88         assert(r == 0);
  89
  90         assert_se(asprintf(&cmd, "xzcat %s | diff %s -", pattern, srcfile) > 0);
  91         assert_se(system(cmd) == 0);
  92
  93         log_debug("/* test decompression */");
  94
  95         assert_se((dst2 = mkostemp_safe(pattern2, O_RDWR|O_CLOEXEC)) >= 0);
  96
  97         assert_se(stat(srcfile, &st) == 0);
  98
  99         assert_se(lseek(dst, 0, SEEK_SET) == 0);
 100         r = decompress_stream(dst, dst2, st.st_size);
 101         assert(r == 0);
 102
 103         assert_se(asprintf(&cmd2, "diff %s %s", srcfile, pattern2) > 0);
 104         assert_se(system(cmd2) == 0);
 105
 106         log_debug("/* test faulty decompression */");
 107
 108         assert_se(lseek(dst, 1, SEEK_SET) == 1);
 109         r = decompress_stream(dst, dst2, st.st_size);
 110         assert(r == -EBADMSG);
 111
 112         assert_se(lseek(dst, 0, SEEK_SET) == 0);
 113         assert_se(lseek(dst2, 0, SEEK_SET) == 0);
 114         r = decompress_stream(dst, dst2, st.st_size - 1);
 115         assert(r == -E2BIG);
 116
 117         assert_se(unlink(pattern) == 0);
 118         assert_se(unlink(pattern2) == 0);
 119 }
 120
 121 int main(int argc, char *argv[]) {
 122
 123         log_set_max_level(LOG_DEBUG);
 124
 125         test_compress_uncompress();
 126         test_uncompress_startswith();
 127         test_compress_stream(argv[0]);
 128
 129         return 0;
 130 }