storage/smbclient: Storage implementation using libsmbclient

Makefile.am

@@ -422,8 +422,17 @@ libstorage_a_SOURCES = \
 	src/storage/plugins/LocalStorage.cxx src/storage/plugins/LocalStorage.hxx \
 	src/storage/FileInfo.hxx
 
+libstorage_a_CPPFLAGS = $(AM_CPPFLAGS) \
+	$(SMBCLIENT_CFLAGS)
+
 STORAGE_LIBS = libstorage.a
 
+if ENABLE_SMBCLIENT
+libstorage_a_SOURCES += \
+	src/lib/smbclient/Init.cxx src/lib/smbclient/Init.hxx \
+	src/storage/plugins/SmbclientStorage.cxx src/neighbor/plugins/SmbclientStorage.hxx
+endif
+
 endif
 
 # neighbor plugins

src/storage/plugins/SmbclientStorage.cxx

+/*
+ * 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.
+ */
+
+#include "config.h"
+#include "SmbclientStorage.hxx"
+#include "storage/StorageInterface.hxx"
+#include "storage/FileInfo.hxx"
+#include "lib/smbclient/Init.hxx"
+#include "util/Error.hxx"
+
+#include <libsmbclient.h>
+
+class SmbclientDirectoryReader final : public StorageDirectoryReader {
+	const std::string base;
+	const unsigned handle;
+
+	const char *name;
+
+public:
+	SmbclientDirectoryReader(std::string &&_base, unsigned _handle)
+		:base(std::move(_base)), handle(_handle) {}
+
+	virtual ~SmbclientDirectoryReader();
+
+	/* virtual methods from class StorageDirectoryReader */
+	virtual const char *Read() override;
+	virtual bool GetInfo(bool follow, FileInfo &info,
+			     Error &error) override;
+};
+
+class SmbclientStorage final : public Storage {
+	const std::string base;
+
+	SMBCCTX *const ctx;
+
+public:
+	SmbclientStorage(const char *_base, SMBCCTX *_ctx)
+		:base(_base), ctx(_ctx) {}
+
+	virtual ~SmbclientStorage() {
+		smbc_free_context(ctx, 1);
+	}
+
+	/* virtual methods from class Storage */
+	virtual bool GetInfo(const char *uri_utf8, bool follow, FileInfo &info,
+			     Error &error) override;
+
+	virtual StorageDirectoryReader *OpenDirectory(const char *uri_utf8,
+						      Error &error) override;
+
+	virtual std::string MapUTF8(const char *uri_utf8) const override;
+};
+
+std::string
+SmbclientStorage::MapUTF8(const char *uri_utf8) const
+{
+	assert(uri_utf8 != nullptr);
+
+	if (*uri_utf8 == 0)
+		return base;
+
+	return PathTraitsUTF8::Build(base.c_str(), uri_utf8);
+}
+
+static bool
+GetInfo(const char *path, FileInfo &info, Error &error)
+{
+	struct stat st;
+	if (smbc_stat(path, &st) < 0) {
+		error.SetErrno();
+		return false;
+	}
+
+	if (S_ISREG(st.st_mode))
+		info.type = FileInfo::Type::REGULAR;
+	else if (S_ISDIR(st.st_mode))
+		info.type = FileInfo::Type::DIRECTORY;
+	else
+		info.type = FileInfo::Type::OTHER;
+
+	info.size = st.st_size;
+	info.mtime = st.st_mtime;
+	info.device = st.st_dev;
+	info.inode = st.st_ino;
+	return true;
+}
+
+bool
+SmbclientStorage::GetInfo(const char *uri_utf8, gcc_unused bool follow,
+			  FileInfo &info, Error &error)
+{
+	const std::string mapped = MapUTF8(uri_utf8);
+	return ::GetInfo(mapped.c_str(), info, error);
+}
+
+StorageDirectoryReader *
+SmbclientStorage::OpenDirectory(const char *uri_utf8, Error &error)
+{
+	std::string mapped = MapUTF8(uri_utf8);
+	int handle = smbc_opendir(mapped.c_str());
+	if (handle < 0) {
+		error.SetErrno();
+		return nullptr;
+	}
+
+	return new SmbclientDirectoryReader(std::move(mapped.c_str()), handle);
+}
+
+gcc_pure
+static bool
+SkipNameFS(const char *name)
+{
+	return name[0] == '.' &&
+		(name[1] == 0 ||
+		 (name[1] == '.' && name[2] == 0));
+}
+
+SmbclientDirectoryReader::~SmbclientDirectoryReader()
+{
+	smbc_close(handle);
+}
+
+const char *
+SmbclientDirectoryReader::Read()
+{
+	struct smbc_dirent *e;
+	while ((e = smbc_readdir(handle)) != nullptr) {
+		name = e->name;
+		if (!SkipNameFS(name))
+			return name;
+	}
+
+	return nullptr;
+}
+
+bool
+SmbclientDirectoryReader::GetInfo(gcc_unused bool follow, FileInfo &info,
+				  Error &error)
+{
+	const std::string path = PathTraitsUTF8::Build(base.c_str(), name);
+	return ::GetInfo(path.c_str(), info, error);
+}
+
+Storage *
+CreateSmbclientStorage(const char *base, Error &error)
+{
+	if (!SmbclientInit(error))
+		return nullptr;
+
+	SMBCCTX *ctx = smbc_new_context();
+	if (ctx == nullptr) {
+		error.SetErrno("smbc_new_context() failed");
+		return nullptr;
+	}
+
+	SMBCCTX *ctx2 = smbc_init_context(ctx);
+	if (ctx2 == nullptr) {
+		error.SetErrno("smbc_init_context() failed");
+		smbc_free_context(ctx, 1);
+		return nullptr;
+	}
+
+	return new SmbclientStorage(base, ctx2);
+}

src/storage/plugins/SmbclientStorage.hxx

+/*
+ * 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.
+ */
+
+#ifndef MPD_STORAGE_SMBCLIENT_HXX
+#define MPD_STORAGE_SMBCLIENT_HXX
+
+#include "check.h"
+
+class Error;
+class Storage;
+
+Storage *
+CreateSmbclientStorage(const char *base, Error &error);
+
+#endif