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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.
*/
#include "config.h"
#include "LocalStorage.hxx"
#include "storage/StoragePlugin.hxx"
#include "storage/StorageInterface.hxx"
#include "storage/FileInfo.hxx"
#include "util/Error.hxx"
#include "fs/FileSystem.hxx"
#include "fs/AllocatedPath.hxx"
#include "fs/DirectoryReader.hxx"
#include <string>
class LocalDirectoryReader final : public StorageDirectoryReader {
AllocatedPath base_fs;
DirectoryReader reader;
std::string name_utf8;
public:
LocalDirectoryReader(AllocatedPath &&_base_fs)
:base_fs(std::move(_base_fs)), reader(base_fs) {}
bool HasFailed() {
return reader.HasFailed();
}
/* virtual methods from class StorageDirectoryReader */
virtual const char *Read() override;
virtual bool GetInfo(bool follow, FileInfo &info,
Error &error) override;
};
class LocalStorage final : public Storage {
const AllocatedPath base_fs;
const std::string base_utf8;
public:
explicit LocalStorage(Path _base_fs)
:base_fs(_base_fs), base_utf8(base_fs.ToUTF8()) {
assert(!base_fs.IsNull());
assert(!base_utf8.empty());
}
/* 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;
virtual AllocatedPath MapFS(const char *uri_utf8) const override;
virtual const char *MapToRelativeUTF8(const char *uri_utf8) const override;
private:
AllocatedPath MapFS(const char *uri_utf8, Error &error) const;
};
static bool
Stat(Path path, bool follow, FileInfo &info, Error &error)
{
struct stat st;
if (!StatFile(path, st, follow)) {
error.SetErrno();
const auto path_utf8 = path.ToUTF8();
error.FormatPrefix("Failed to stat %s: ", path_utf8.c_str());
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;
}
std::string
LocalStorage::MapUTF8(const char *uri_utf8) const
{
assert(uri_utf8 != nullptr);
if (*uri_utf8 == 0)
return base_utf8;
return PathTraitsUTF8::Build(base_utf8.c_str(), uri_utf8);
}
AllocatedPath
LocalStorage::MapFS(const char *uri_utf8, Error &error) const
{
assert(uri_utf8 != nullptr);
if (*uri_utf8 == 0)
return base_fs;
AllocatedPath path_fs = AllocatedPath::FromUTF8(uri_utf8, error);
if (!path_fs.IsNull())
path_fs = AllocatedPath::Build(base_fs, path_fs);
return path_fs;
}
AllocatedPath
LocalStorage::MapFS(const char *uri_utf8) const
{
return MapFS(uri_utf8, IgnoreError());
}
const char *
LocalStorage::MapToRelativeUTF8(const char *uri_utf8) const
{
return PathTraitsUTF8::Relative(base_utf8.c_str(), uri_utf8);
}
bool
LocalStorage::GetInfo(const char *uri_utf8, bool follow, FileInfo &info,
Error &error)
{
AllocatedPath path_fs = MapFS(uri_utf8, error);
if (path_fs.IsNull())
return false;
return Stat(path_fs, follow, info, error);
}
StorageDirectoryReader *
LocalStorage::OpenDirectory(const char *uri_utf8, Error &error)
{
AllocatedPath path_fs = MapFS(uri_utf8, error);
if (path_fs.IsNull())
return nullptr;
LocalDirectoryReader *reader =
new LocalDirectoryReader(std::move(path_fs));
if (reader->HasFailed()) {
error.FormatErrno("Failed to open '%s'", uri_utf8);
delete reader;
return nullptr;
}
return reader;
}
gcc_pure
static bool
SkipNameFS(const char *name_fs)
{
return name_fs[0] == '.' &&
(name_fs[1] == 0 ||
(name_fs[1] == '.' && name_fs[2] == 0));
}
const char *
LocalDirectoryReader::Read()
{
while (reader.ReadEntry()) {
const Path name_fs = reader.GetEntry();
if (SkipNameFS(name_fs.c_str()))
continue;
name_utf8 = name_fs.ToUTF8();
if (name_utf8.empty())
continue;
return name_utf8.c_str();
}
return nullptr;
}
bool
LocalDirectoryReader::GetInfo(bool follow, FileInfo &info, Error &error)
{
const AllocatedPath path_fs =
AllocatedPath::Build(base_fs, reader.GetEntry());
return Stat(path_fs, follow, info, error);
}
Storage *
CreateLocalStorage(Path base_fs)
{
return new LocalStorage(base_fs);
}
const StoragePlugin local_storage_plugin = {
"local",
nullptr,
};
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