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101 lines
2.9 KiB
C++
101 lines
2.9 KiB
C++
#pragma once
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#include <base/types.h>
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#include <Common/Exception.h>
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#include <filesystem>
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#include <memory>
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#include <string>
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#include <sys/statvfs.h>
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#include <Poco/TemporaryFile.h>
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namespace fs = std::filesystem;
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namespace DB
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{
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using PocoTemporaryFile = Poco::TemporaryFile;
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bool enoughSpaceInDirectory(const std::string & path, size_t data_size);
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std::unique_ptr<PocoTemporaryFile> createTemporaryFile(const std::string & folder_path);
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// Determine what block device is responsible for specified path
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#if !defined(OS_LINUX)
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[[noreturn]]
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#endif
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String getBlockDeviceId([[maybe_unused]] const String & path);
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std::optional<String> tryGetBlockDeviceId([[maybe_unused]] const String & path);
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enum class BlockDeviceType
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{
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UNKNOWN = 0, // we were unable to determine device type
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NONROT = 1, // not a rotational device (SSD, NVME, etc)
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ROT = 2 // rotational device (HDD)
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};
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// Try to determine block device type
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#if !defined(OS_LINUX)
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[[noreturn]]
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#endif
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BlockDeviceType getBlockDeviceType([[maybe_unused]] const String & device_id);
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// Get size of read-ahead in bytes for specified block device
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#if !defined(OS_LINUX)
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[[noreturn]]
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#endif
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UInt64 getBlockDeviceReadAheadBytes([[maybe_unused]] const String & device_id);
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/// Returns mount point of filesystem where absolute_path (must exist) is located
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std::filesystem::path getMountPoint(std::filesystem::path absolute_path);
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/// Returns name of filesystem mounted to mount_point
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#if !defined(OS_LINUX)
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[[noreturn]]
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#endif
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String getFilesystemName([[maybe_unused]] const String & mount_point);
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struct statvfs getStatVFS(const String & path);
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/// Returns true if path starts with prefix path
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bool pathStartsWith(const std::filesystem::path & path, const std::filesystem::path & prefix_path);
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/// Returns true if path starts with prefix path
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bool pathStartsWith(const String & path, const String & prefix_path);
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/// Same as pathStartsWith, but without canonization, i.e. allowed to check symlinks.
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/// (Path is made absolute and normalized.)
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bool fileOrSymlinkPathStartsWith(const String & path, const String & prefix_path);
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size_t getSizeFromFileDescriptor(int fd, const String & file_name = "");
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std::optional<size_t> tryGetSizeFromFilePath(const String & path);
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/// Get inode number for a file path.
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/// Will not work correctly if filesystem does not support inodes.
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Int64 getINodeNumberFromPath(const String & path);
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}
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namespace FS
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{
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bool createFile(const std::string & path);
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bool exists(const std::string & path);
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bool canRead(const std::string & path);
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bool canWrite(const std::string & path);
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bool canExecute(const std::string & path);
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/// st_mtime
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time_t getModificationTime(const std::string & path);
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Poco::Timestamp getModificationTimestamp(const std::string & path);
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void setModificationTime(const std::string & path, time_t time);
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/// st_ctime
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time_t getChangeTime(const std::string & path);
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bool isSymlink(const fs::path & path);
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fs::path readSymlink(const fs::path & path);
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}
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