Classes

There are many classes encapsulating a specific aspect of the filesystem.

Class	Description
path	Represents a path.
filesystem_error	Defines an exception object.
directory_entry	Represents a directory entry.
directory_iterator	Defines a directory iterator.
recursive_directory_iterator	Defines a recursive directory iterator.
file_status	Stores information about the file.
space_info	Represents filesystem information.
file_type	Indicates the type of a file.
perms	Represents file access permissions.
perm_options	Represents options for the function permissions
copy_options	Represents options for the functions copy
directory_options	Represents options for the functions directory_iterator
file_time_type	Represents file time.

The various classes the filesystem

Manipulating the permissions of a file

The permissions for a file are represented by the class std::filesystem::perms. It is a BitmaskType and can, therefore, be manipulated by bitwise operations. The access permissions are based on POSIX.

The program from en.cppreference.com shows how you can read and manipulate the owner, group, and other (world) bits of a file.