Userland: Create stress-truncate test program

1 files changed, 68 insertions, 0 deletions

diff --git a/Userland/Tests/Kernel/stress-truncate.cpp b/Userland/Tests/Kernel/stress-truncate.cpp
new file mode 100644
index 0000000000..e2a6f716e8
--- /dev/null
+++ b/Userland/Tests/Kernel/stress-truncate.cpp
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <AK/Random.h>
+#include <LibCore/ArgsParser.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+int main(int argc, char** argv)
+{
+    const char* target = nullptr;
+    int max_file_size = 1024 * 1024;
+    int count = 1024;
+
+    Core::ArgsParser args_parser;
+    args_parser.add_option(max_file_size, "Maximum file size to generate", "max-size", 's', "size");
+    args_parser.add_option(count, "Number of truncations to run", "number", 'n', "number");
+    args_parser.add_positional_argument(target, "Target file path", "target");
+    args_parser.parse(argc, argv);
+
+    int fd = creat(target, 0666);
+    if (fd < 0) {
+        perror("Couldn't create target file");
+        return EXIT_FAILURE;
+    }
+    close(fd);
+
+    for (int i = 0; i < count; i++) {
+        auto new_file_size = AK::get_random<uint64_t>() % (max_file_size + 1);
+        printf("(%d/%d)\tTruncating to %" PRIu64 " bytes...\n", i + 1, count, new_file_size);
+        if (truncate(target, new_file_size) < 0) {
+            perror("Couldn't truncate target file");
+            return EXIT_FAILURE;
+        }
+    }
+
+    if (unlink(target) < 0) {
+        perror("Couldn't remove target file");
+        return EXIT_FAILURE;
+    }
+
+    return EXIT_SUCCESS;
+}