jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2021, the SerenityOS developers.
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <AK/Random.h>
8#include <LibCore/ArgsParser.h>
9#include <fcntl.h>
10#include <inttypes.h>
11#include <sys/stat.h>
12#include <unistd.h>
13
14int main(int argc, char** argv)
15{
16 Vector<StringView> arguments;
17 arguments.ensure_capacity(argc);
18 for (auto i = 0; i < argc; ++i)
19 arguments.append({ argv[i], strlen(argv[i]) });
20
21 DeprecatedString target;
22 int max_file_size = 1024 * 1024;
23 int count = 1024;
24
25 Core::ArgsParser args_parser;
26 args_parser.add_option(max_file_size, "Maximum file size to generate", "max-size", 's', "size");
27 args_parser.add_option(count, "Number of truncations to run", "number", 'n', "number");
28 args_parser.add_positional_argument(target, "Target file path", "target");
29 args_parser.parse(arguments);
30
31 int fd = creat(target.characters(), 0666);
32 if (fd < 0) {
33 perror("Couldn't create target file");
34 return EXIT_FAILURE;
35 }
36 close(fd);
37
38 for (int i = 0; i < count; i++) {
39 auto new_file_size = AK::get_random<uint64_t>() % (max_file_size + 1);
40 printf("(%d/%d)\tTruncating to %" PRIu64 " bytes...\n", i + 1, count, new_file_size);
41 if (truncate(target.characters(), new_file_size) < 0) {
42 perror("Couldn't truncate target file");
43 return EXIT_FAILURE;
44 }
45 }
46
47 if (unlink(target.characters()) < 0) {
48 perror("Couldn't remove target file");
49 return EXIT_FAILURE;
50 }
51
52 return EXIT_SUCCESS;
53}