ns_layers Namespace Reference

Filesystem layer management command implementation. More...

Enumerations
enum class	CommitMode { BINARY , LAYER , FILE }
	Commit changes into a novel layer (binary/layer/file modes) More...

Functions
Value< void >	create (fs::path const &path_dir_src, fs::path const &path_file_dst, fs::path const &path_file_list, uint64_t compression_level)
	Creates a layer (filesystem) from a source directory.
Value< void >	add (fs::path const &path_file_binary, fs::path const &path_file_layer)
	Includes a filesystem in the target FlatImage.
Value< uint64_t >	find_next_layer_number (fs::path const &path_dir_layers)
	Finds the next available layer number in the layers directory.
Value< void >	commit (fs::path const &path_file_binary, fs::path const &path_dir_src, fs::path const &path_file_layer_tmp, fs::path const &path_file_list_tmp, uint32_t layer_compression_level, CommitMode mode, std::optional< fs::path > const &path_dst=std::nullopt)
void	list (ns_filesystems::ns_layers::Layers const &layers)
	Lists all layers in the format index:offset:size:path.

Detailed Description

Filesystem layer management command implementation.

Implements the fim-layer command for creating, listing, and managing DwarFS compressed filesystem layers. Supports layer commit operations to snapshot the current writable overlay into a compressed read-only layer, and layer enumeration to display all available layers.

Enumeration Type Documentation

CommitMode

enum class ns_layers::CommitMode

strong

Commit changes into a novel layer (binary/layer/file modes)

Parameters

path_file_binary	Path to the FlatImage binary
path_dir_src	Source directory with overlay changes
path_file_layer_tmp	Temporary layer file path
path_file_list_tmp	Temporary file list path
layer_compression_level	Compression level for the layer
path_dir_layers	Path to the layers directory (for layer mode)
mode	Commit mode (binary, layer, or file)
path_file_dst	Destination path (only for file mode)

Returns

Value<void> Nothing on success, or the respective error

Definition at line 189 of file layers.hpp.

Function Documentation

add()

Value< void > ns_layers::add ( fs::path const & path_file_binary, fs::path const & path_file_layer )

inlinenodiscard

Includes a filesystem in the target FlatImage.

Parameters

path_file_binary	Path to the target FlatImage in which to include the filesystem
path_file_layer	Path to the filesystem to include in the FlatImage

Returns

Value<void> Nothing on success, or the respective error

Definition at line 127 of file layers.hpp.

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commit()

Value< void > ns_layers::commit ( fs::path const & path_file_binary, fs::path const & path_dir_src, fs::path const & path_file_layer_tmp, fs::path const & path_file_list_tmp, uint32_t layer_compression_level, CommitMode mode, std::optional< fs::path > const & path_dst = std::nullopt )

inlinenodiscard

Definition at line 191 of file layers.hpp.

create()

Value< void > ns_layers::create ( fs::path const & path_dir_src, fs::path const & path_file_dst, fs::path const & path_file_list, uint64_t compression_level )

inlinenodiscard

Creates a layer (filesystem) from a source directory.

Parameters

path_dir_src	Path to the source directory
path_file_dst	Path to the output filesystem file
path_file_list	Path to a temporary file to store the list of files to compress
compression_level	The compression level to create the filesystem

Returns

Value<void> Nothing on success, or the respective error

Definition at line 50 of file layers.hpp.

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find_next_layer_number()

Value< uint64_t > ns_layers::find_next_layer_number ( fs::path const & path_dir_layers )

inlinenodiscard

Finds the next available layer number in the layers directory.

Parameters

path_dir_layers

Path to the layers directory

Returns

uint64_t Next available layer number (0-indexed)

Definition at line 154 of file layers.hpp.

list()

void ns_layers::list ( ns_filesystems::ns_layers::Layers const & layers )

inline

Lists all layers in the format index:offset:size:path.

Parameters

layers

The Layers object containing all filesystem layers

Definition at line 274 of file layers.hpp.

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