--- /dev/null
+// Copyright (c) 2012 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+#include <stdio.h>
+#include "db/dbformat.h"
+#include "db/filename.h"
+#include "db/log_reader.h"
+#include "db/version_edit.h"
+#include "db/write_batch_internal.h"
+#include "leveldb/env.h"
+#include "leveldb/iterator.h"
+#include "leveldb/options.h"
+#include "leveldb/status.h"
+#include "leveldb/table.h"
+#include "leveldb/write_batch.h"
+#include "util/logging.h"
+
+namespace leveldb {
+
+namespace {
+
+bool GuessType(const std::string& fname, FileType* type) {
+ size_t pos = fname.rfind('/');
+ std::string basename;
+ if (pos == std::string::npos) {
+ basename = fname;
+ } else {
+ basename = std::string(fname.data() + pos + 1, fname.size() - pos - 1);
+ }
+ uint64_t ignored;
+ return ParseFileName(basename, &ignored, type);
+}
+
+// Notified when log reader encounters corruption.
+class CorruptionReporter : public log::Reader::Reporter {
+ public:
+ virtual void Corruption(size_t bytes, const Status& status) {
+ printf("corruption: %d bytes; %s\n",
+ static_cast<int>(bytes),
+ status.ToString().c_str());
+ }
+};
+
+// Print contents of a log file. (*func)() is called on every record.
+bool PrintLogContents(Env* env, const std::string& fname,
+ void (*func)(Slice)) {
+ SequentialFile* file;
+ Status s = env->NewSequentialFile(fname, &file);
+ if (!s.ok()) {
+ fprintf(stderr, "%s\n", s.ToString().c_str());
+ return false;
+ }
+ CorruptionReporter reporter;
+ log::Reader reader(file, &reporter, true, 0);
+ Slice record;
+ std::string scratch;
+ while (reader.ReadRecord(&record, &scratch)) {
+ printf("--- offset %llu; ",
+ static_cast<unsigned long long>(reader.LastRecordOffset()));
+ (*func)(record);
+ }
+ delete file;
+ return true;
+}
+
+// Called on every item found in a WriteBatch.
+class WriteBatchItemPrinter : public WriteBatch::Handler {
+ public:
+ uint64_t offset_;
+ uint64_t sequence_;
+
+ virtual void Put(const Slice& key, const Slice& value) {
+ printf(" put '%s' '%s'\n",
+ EscapeString(key).c_str(),
+ EscapeString(value).c_str());
+ }
+ virtual void Delete(const Slice& key) {
+ printf(" del '%s'\n",
+ EscapeString(key).c_str());
+ }
+};
+
+
+// Called on every log record (each one of which is a WriteBatch)
+// found in a kLogFile.
+static void WriteBatchPrinter(Slice record) {
+ if (record.size() < 12) {
+ printf("log record length %d is too small\n",
+ static_cast<int>(record.size()));
+ return;
+ }
+ WriteBatch batch;
+ WriteBatchInternal::SetContents(&batch, record);
+ printf("sequence %llu\n",
+ static_cast<unsigned long long>(WriteBatchInternal::Sequence(&batch)));
+ WriteBatchItemPrinter batch_item_printer;
+ Status s = batch.Iterate(&batch_item_printer);
+ if (!s.ok()) {
+ printf(" error: %s\n", s.ToString().c_str());
+ }
+}
+
+bool DumpLog(Env* env, const std::string& fname) {
+ return PrintLogContents(env, fname, WriteBatchPrinter);
+}
+
+// Called on every log record (each one of which is a WriteBatch)
+// found in a kDescriptorFile.
+static void VersionEditPrinter(Slice record) {
+ VersionEdit edit;
+ Status s = edit.DecodeFrom(record);
+ if (!s.ok()) {
+ printf("%s\n", s.ToString().c_str());
+ return;
+ }
+ printf("%s", edit.DebugString().c_str());
+}
+
+bool DumpDescriptor(Env* env, const std::string& fname) {
+ return PrintLogContents(env, fname, VersionEditPrinter);
+}
+
+bool DumpTable(Env* env, const std::string& fname) {
+ uint64_t file_size;
+ RandomAccessFile* file = NULL;
+ Table* table = NULL;
+ Status s = env->GetFileSize(fname, &file_size);
+ if (s.ok()) {
+ s = env->NewRandomAccessFile(fname, &file);
+ }
+ if (s.ok()) {
+ // We use the default comparator, which may or may not match the
+ // comparator used in this database. However this should not cause
+ // problems since we only use Table operations that do not require
+ // any comparisons. In particular, we do not call Seek or Prev.
+ s = Table::Open(Options(), file, file_size, &table);
+ }
+ if (!s.ok()) {
+ fprintf(stderr, "%s\n", s.ToString().c_str());
+ delete table;
+ delete file;
+ return false;
+ }
+
+ ReadOptions ro;
+ ro.fill_cache = false;
+ Iterator* iter = table->NewIterator(ro);
+ for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
+ ParsedInternalKey key;
+ if (!ParseInternalKey(iter->key(), &key)) {
+ printf("badkey '%s' => '%s'\n",
+ EscapeString(iter->key()).c_str(),
+ EscapeString(iter->value()).c_str());
+ } else {
+ char kbuf[20];
+ const char* type;
+ if (key.type == kTypeDeletion) {
+ type = "del";
+ } else if (key.type == kTypeValue) {
+ type = "val";
+ } else {
+ snprintf(kbuf, sizeof(kbuf), "%d", static_cast<int>(key.type));
+ type = kbuf;
+ }
+ printf("'%s' @ %8llu : %s => '%s'\n",
+ EscapeString(key.user_key).c_str(),
+ static_cast<unsigned long long>(key.sequence),
+ type,
+ EscapeString(iter->value()).c_str());
+ }
+ }
+ s = iter->status();
+ if (!s.ok()) {
+ printf("iterator error: %s\n", s.ToString().c_str());
+ }
+
+ delete iter;
+ delete table;
+ delete file;
+ return true;
+}
+
+bool DumpFile(Env* env, const std::string& fname) {
+ FileType ftype;
+ if (!GuessType(fname, &ftype)) {
+ fprintf(stderr, "%s: unknown file type\n", fname.c_str());
+ return false;
+ }
+ switch (ftype) {
+ case kLogFile: return DumpLog(env, fname);
+ case kDescriptorFile: return DumpDescriptor(env, fname);
+ case kTableFile: return DumpTable(env, fname);
+
+ default: {
+ fprintf(stderr, "%s: not a dump-able file type\n", fname.c_str());
+ break;
+ }
+ }
+ return false;
+}
+
+bool HandleDumpCommand(Env* env, char** files, int num) {
+ bool ok = true;
+ for (int i = 0; i < num; i++) {
+ ok &= DumpFile(env, files[i]);
+ }
+ return ok;
+}
+
+}
+} // namespace leveldb
+
+static void Usage() {
+ fprintf(
+ stderr,
+ "Usage: leveldbutil command...\n"
+ " dump files... -- dump contents of specified files\n"
+ );
+}
+
+int main(int argc, char** argv) {
+ leveldb::Env* env = leveldb::Env::Default();
+ bool ok = true;
+ if (argc < 2) {
+ Usage();
+ ok = false;
+ } else {
+ std::string command = argv[1];
+ if (command == "dump") {
+ ok = leveldb::HandleDumpCommand(env, argv+2, argc-2);
+ } else {
+ Usage();
+ ok = false;
+ }
+ }
+ return (ok ? 0 : 1);
+}
projects / platform / upstream / leveldb.git / commitdiff