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-rw-r--r--src/command/StorageCommands.cxx295
1 files changed, 295 insertions, 0 deletions
diff --git a/src/command/StorageCommands.cxx b/src/command/StorageCommands.cxx
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+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define __STDC_FORMAT_MACROS /* for PRIu64 */
+
+#include "config.h"
+#include "StorageCommands.hxx"
+#include "CommandError.hxx"
+#include "protocol/Result.hxx"
+#include "util/UriUtil.hxx"
+#include "util/Error.hxx"
+#include "fs/Traits.hxx"
+#include "client/Client.hxx"
+#include "Partition.hxx"
+#include "Instance.hxx"
+#include "storage/Registry.hxx"
+#include "storage/CompositeStorage.hxx"
+#include "storage/FileInfo.hxx"
+#include "db/plugins/simple/SimpleDatabasePlugin.hxx"
+#include "db/update/Service.hxx"
+#include "TimePrint.hxx"
+#include "Idle.hxx"
+
+#include <inttypes.h> /* for PRIu64 */
+
+gcc_pure
+static bool
+skip_path(const char *name_utf8)
+{
+ return strchr(name_utf8, '\n') != nullptr;
+}
+
+#if defined(WIN32) && GCC_CHECK_VERSION(4,6)
+/* PRIu64 causes bogus compiler warning */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat"
+#pragma GCC diagnostic ignored "-Wformat-extra-args"
+#endif
+
+static bool
+handle_listfiles_storage(Client &client, StorageDirectoryReader &reader,
+ Error &error)
+{
+ const char *name_utf8;
+ while ((name_utf8 = reader.Read()) != nullptr) {
+ if (skip_path(name_utf8))
+ continue;
+
+ FileInfo info;
+ if (!reader.GetInfo(false, info, error))
+ continue;
+
+ switch (info.type) {
+ case FileInfo::Type::OTHER:
+ /* ignore */
+ continue;
+
+ case FileInfo::Type::REGULAR:
+ client_printf(client, "file: %s\n"
+ "size: %" PRIu64 "\n",
+ name_utf8,
+ info.size);
+ break;
+
+ case FileInfo::Type::DIRECTORY:
+ client_printf(client, "directory: %s\n", name_utf8);
+ break;
+ }
+
+ if (info.mtime != 0)
+ time_print(client, "Last-Modified", info.mtime);
+ }
+
+ return true;
+}
+
+#if defined(WIN32) && GCC_CHECK_VERSION(4,6)
+#pragma GCC diagnostic pop
+#endif
+
+static bool
+handle_listfiles_storage(Client &client, Storage &storage, const char *uri,
+ Error &error)
+{
+ auto reader = storage.OpenDirectory(uri, error);
+ if (reader == nullptr)
+ return false;
+
+ bool success = handle_listfiles_storage(client, *reader, error);
+ delete reader;
+ return success;
+}
+
+CommandResult
+handle_listfiles_storage(Client &client, Storage &storage, const char *uri)
+{
+ Error error;
+ if (!handle_listfiles_storage(client, storage, uri, error))
+ return print_error(client, error);
+
+ return CommandResult::OK;
+}
+
+CommandResult
+handle_listfiles_storage(Client &client, const char *uri)
+{
+ Error error;
+ Storage *storage = CreateStorageURI(uri, error);
+ if (storage == nullptr) {
+ if (error.IsDefined())
+ return print_error(client, error);
+
+ command_error(client, ACK_ERROR_ARG,
+ "Unrecognized storage URI");
+ return CommandResult::ERROR;
+ }
+
+ bool success = handle_listfiles_storage(client, *storage, "", error);
+ delete storage;
+ if (!success)
+ return print_error(client, error);
+
+ return CommandResult::OK;
+}
+
+static void
+print_storage_uri(Client &client, const Storage &storage)
+{
+ std::string uri = storage.MapUTF8("");
+ if (uri.empty())
+ return;
+
+ if (PathTraitsFS::IsAbsolute(uri.c_str())) {
+ /* storage points to local directory */
+
+ if (!client.IsLocal())
+ /* only "local" clients may see local paths
+ (same policy as with the "config"
+ command) */
+ return;
+ } else {
+ /* hide username/passwords from client */
+
+ std::string allocated = uri_remove_auth(uri.c_str());
+ if (!allocated.empty())
+ uri = std::move(allocated);
+ }
+
+ client_printf(client, "storage: %s\n", uri.c_str());
+}
+
+CommandResult
+handle_listmounts(Client &client, gcc_unused unsigned argc, gcc_unused char *argv[])
+{
+ Storage *_composite = client.partition.instance.storage;
+ if (_composite == nullptr) {
+ command_error(client, ACK_ERROR_NO_EXIST, "No database");
+ return CommandResult::ERROR;
+ }
+
+ CompositeStorage &composite = *(CompositeStorage *)_composite;
+
+ const auto visitor = [&client](const char *mount_uri,
+ const Storage &storage){
+ client_printf(client, "mount: %s\n", mount_uri);
+ print_storage_uri(client, storage);
+ };
+
+ composite.VisitMounts(visitor);
+
+ return CommandResult::OK;
+}
+
+CommandResult
+handle_mount(Client &client, gcc_unused unsigned argc, char *argv[])
+{
+ Storage *_composite = client.partition.instance.storage;
+ if (_composite == nullptr) {
+ command_error(client, ACK_ERROR_NO_EXIST, "No database");
+ return CommandResult::ERROR;
+ }
+
+ CompositeStorage &composite = *(CompositeStorage *)_composite;
+
+ const char *const local_uri = argv[1];
+ const char *const remote_uri = argv[2];
+
+ if (*local_uri == 0) {
+ command_error(client, ACK_ERROR_ARG, "Bad mount point");
+ return CommandResult::ERROR;
+ }
+
+ if (strchr(local_uri, '/') != nullptr) {
+ /* allow only top-level mounts for now */
+ /* TODO: eliminate this limitation after ensuring that
+ UpdateQueue::Erase() really gets called for every
+ unmount, and no Directory disappears recursively
+ during database update */
+ command_error(client, ACK_ERROR_ARG, "Bad mount point");
+ return CommandResult::ERROR;
+ }
+
+ Error error;
+ Storage *storage = CreateStorageURI(remote_uri, error);
+ if (storage == nullptr) {
+ if (error.IsDefined())
+ return print_error(client, error);
+
+ command_error(client, ACK_ERROR_ARG,
+ "Unrecognized storage URI");
+ return CommandResult::ERROR;
+ }
+
+ composite.Mount(local_uri, storage);
+ idle_add(IDLE_MOUNT);
+
+#ifdef ENABLE_DATABASE
+ Database *_db = client.partition.instance.database;
+ if (_db != nullptr && _db->IsPlugin(simple_db_plugin)) {
+ SimpleDatabase &db = *(SimpleDatabase *)_db;
+
+ if (!db.Mount(local_uri, remote_uri, error)) {
+ composite.Unmount(local_uri);
+ return print_error(client, error);
+ }
+
+ // TODO: call Instance::OnDatabaseModified()?
+ // TODO: trigger database update?
+ idle_add(IDLE_DATABASE);
+ }
+#endif
+
+ return CommandResult::OK;
+}
+
+CommandResult
+handle_unmount(Client &client, gcc_unused unsigned argc, char *argv[])
+{
+ Storage *_composite = client.partition.instance.storage;
+ if (_composite == nullptr) {
+ command_error(client, ACK_ERROR_NO_EXIST, "No database");
+ return CommandResult::ERROR;
+ }
+
+ CompositeStorage &composite = *(CompositeStorage *)_composite;
+
+ const char *const local_uri = argv[1];
+
+ if (*local_uri == 0) {
+ command_error(client, ACK_ERROR_ARG, "Bad mount point");
+ return CommandResult::ERROR;
+ }
+
+#ifdef ENABLE_DATABASE
+ if (client.partition.instance.update != nullptr)
+ /* ensure that no database update will attempt to work
+ with the database/storage instances we're about to
+ destroy here */
+ client.partition.instance.update->CancelMount(local_uri);
+
+ Database *_db = client.partition.instance.database;
+ if (_db != nullptr && _db->IsPlugin(simple_db_plugin)) {
+ SimpleDatabase &db = *(SimpleDatabase *)_db;
+
+ if (db.Unmount(local_uri))
+ // TODO: call Instance::OnDatabaseModified()?
+ idle_add(IDLE_DATABASE);
+ }
+#endif
+
+ if (!composite.Unmount(local_uri)) {
+ command_error(client, ACK_ERROR_ARG, "Not a mount point");
+ return CommandResult::ERROR;
+ }
+
+ idle_add(IDLE_MOUNT);
+
+ return CommandResult::OK;
+}
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