Linux Manuals session 3

std::filesystem::directory_entry::last_write_time – std::filesystem::directory_entry::last_write_time Synopsis std::filesystem::file_time_type last_write_time() const; (since C++ 17) std::filesystem::file_time_type last_write_time(std::error_code &ec) const noexcept; If the last modification time is cached in this directory_entry, returns the cached value. Otherwise, returns std::filesystem::last_write_time(path()) or std::filesystem::last_write_time(path(), ec), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value The last modification time for the…

std::filesystem::directory_entry::is_symlink – std::filesystem::directory_entry::is_symlink Synopsis bool is_symlink() const; (since C++ 17) bool is_symlink(std::error_code &ec) const noexcept; Checks whether the pointed-to object is a symlink. Effectively returns std::filesystem::is_symlink(symlink_status()) or std::filesystem::is_symlink(symlink_status(ec)), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value true if the referred-to filesystem object is a symlink, false otherwise. Exceptions The…

std::filesystem::directory_entry::is_socket – std::filesystem::directory_entry::is_socket Synopsis bool is_socket() const; (since C++ 17) bool is_socket(std::error_code &ec) const noexcept; Checks whether the pointed-to object is a named socket. Effectively returns std::filesystem::is_socket(status()) or std::filesystem::is_socket(status(ec)), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value true if the referred-to filesystem object is a named socket, false otherwise….

std::filesystem::directory_entry::is_regular_file – std::filesystem::directory_entry::is_regular_file Synopsis bool is_regular_file() const; (since C++ 17) bool is_regular_file(std::error_code &ec) const noexcept; Checks whether the pointed-to object is a regular file. Effectively returns std::filesystem::is_regular_file(status()) or std::filesystem::is_regular_file(status(ec)), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value true if the referred-to filesystem object is a regular file, false otherwise….

std::filesystem::directory_entry::is_other – std::filesystem::directory_entry::is_other Synopsis bool is_other() const; (since C++ 17) bool is_other(std::error_code &ec) const noexcept; Checks whether the pointed-to object is an other file (not a regular file, directory or symlink). Effectively returns std::filesystem::is_other(status()) or std::filesystem::is_other(status(ec)), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value true if the referred-to filesystem…

std::filesystem::directory_entry::is_fifo – std::filesystem::directory_entry::is_fifo Synopsis bool is_fifo() const; (since C++ 17) bool is_fifo(std::error_code &ec) const noexcept; Checks whether the pointed-to object is a FIFO or pipe file. Effectively returns std::filesystem::is_fifo(status()) or std::filesystem::is_fifo(status(ec)), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value true if the referred-to filesystem object is a FIFO or…

std::filesystem::directory_entry::is_directory – std::filesystem::directory_entry::is_directory Synopsis bool is_directory() const; (since C++ 17) bool is_directory(std::error_code &ec) const noexcept; Checks whether the pointed-to object is a directory. Effectively returns std::filesystem::is_directory(status()) or std::filesystem::is_directory(status(ec)), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value true if the referred-to filesystem object is a directory, false otherwise. Exceptions The…

std::filesystem::directory_entry::is_character_file – std::filesystem::directory_entry::is_character_file Synopsis bool is_character_file() const; (since C++ 17) bool is_character_file(std::error_code &ec) const noexcept; Checks whether the pointed-to object is a character device. Effectively returns std::filesystem::is_character_file(status()) or std::filesystem::is_character_file(status(ec)), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value true if the referred-to filesystem object is a character device, false otherwise….

std::filesystem::directory_entry::is_block_file – std::filesystem::directory_entry::is_block_file Synopsis bool is_block_file() const; (since C++ 17) bool is_block_file(std::error_code &ec) const noexcept; Checks whether the pointed-to object is a block device. Effectively returns std::filesystem::is_block_file(status()) or std::filesystem::is_block_file(status(ec)), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value true if the referred-to filesystem object is a block device, false otherwise….

std::filesystem::directory_entry::hard_link_count – std::filesystem::directory_entry::hard_link_count Synopsis std::uintmax_t hard_link_count() const; (since C++ 17) std::uintmax_t hard_link_count(std::error_code &ec) const noexcept; If the number of hard links is cached in this directory_entry, returns the cached value. Otherwise, returns std::filesystem::hard_link_count(path()) or std::filesystem::hard_link_count(path(), ec), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value The number of hard links…

std::filesystem::directory_entry::file_size – std::filesystem::directory_entry::file_size Synopsis std::uintmax_t file_size() const; (since C++ 17) std::uintmax_t file_size(std::error_code &ec) const noexcept; If the file size is cached in this directory_entry, returns the cached value. Otherwise, returns std::filesystem::file_size(path()) or std::filesystem::file_size(path(), ec), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value The size of the referred-to filesystem object…

std::filesystem::directory_entry::exists – std::filesystem::directory_entry::exists Synopsis bool exists() const; (since C++ 17) bool exists(std::error_code &ec) const noexcept; Checks whether the pointed-to object exists. Effectively returns std::filesystem::exists(status()) or std::filesystem::exists(status(ec)), respectively Parameters ec – out-parameter for error reporting in the non-throwing overload Return value true if the referred-to filesystem object exists. Exceptions The overload that does not take a…

std::filesystem::directory_entry::directory_entry – std::filesystem::directory_entry::directory_entry Synopsis directory_entry() noexcept = default; (1)(since C++ 17) directory_entry(const directory_entry &) = default; (2)(since C++ 17) directory_entry(directory_entry &&) noexcept = default; (3)(since C++ 17) explicit directory_entry(const std::filesystem::path &p); (4)(since C++ 17) directory_entry(const std::filesystem::path &p, std::error_code &ec); Constructs a new directory_entry object. 1) Default constructor. 2) Defaulted copy constructor. 3) Defaulted move constructor….

std::filesystem::directory_entry::assign – std::filesystem::directory_entry::assign Synopsis void assign(const std::filesystem::path &p); (since C++ 17) void assign(const std::filesystem::path &p, std::error_code &ec); Assigns new content to the directory entry object. Sets the path to p and calls refresh to update the cached attributes. If an error occurs, the values of the cached attributes are unspecified. Parameters p – path to…

std::filesystem::directory_entry – std::filesystem::directory_entry Synopsis Defined in header <filesystem> class directory_entry; (since C++17) Represents a directory entry. The object stores a path as a member and may also store additional file attributes (hard link count, status, symlink status file size, and last write time) during directory iteration. Member functions                      constructs a directory entry constructor (public member…

std::filesystem::current_path – std::filesystem::current_path Synopsis Defined in header<filesystem> path current_path(); (1)(since C++ 17) path current_path(std::error_code &ec); (2)(since C++ 17) void current_path(const std::filesystem::path &p); (3)(since C++ 17) void current_path(const std::filesystem::path &p, (4)(since C++ 17) std::error_code &ec) noexcept; Returns or changes the current path. 1-2) Returns the absolute path of the current working directory, obtained as if (in…

std::filesystem::create_symlink,std::filesystem::create_directory_symlink – std::filesystem::create_symlink,std::filesystem::create_directory_symlink Synopsis Defined in header<filesystem> void create_symlink(const std::filesystem::path &target, const std::filesystem::path &link); void create_symlink(const std::filesystem::path &target, (1)(since C++ 17) const std::filesystem::path &link, std::error_code &ec) noexcept; void create_directory_symlink(const std::filesystem::path &target, const std::filesystem::path &link); void create_directory_symlink(const std::filesystem::path &target, (2)(since C++ 17) const std::filesystem::path &link, std::error_code &ec) noexcept; Creates a symbolic link link with its target…

std::filesystem::create_hard_link – std::filesystem::create_hard_link Synopsis Defined in header<filesystem> void create_hard_link(const std::filesystem::path &target, const std::filesystem::path &link); void create_hard_link(const std::filesystem::path &target, (since C++ 17) const std::filesystem::path &link, std::error_code &ec) noexcept; Creates a hard link link with its target set to target as if by POSIX link(): the pathname target must exist. Once created, link and target are two…

std::filesystem::create_directory,std::filesystem::create_directories – std::filesystem::create_directory,std::filesystem::create_directories Synopsis Defined in header<filesystem> bool create_directory(const std::filesystem::path &p); (1)(since C++ 17) bool create_directory(const std::filesystem::path &p, std::error_code &ec) noexcept; bool create_directory(const std::filesystem::path &p, const std::filesystem::path &existing_p); bool create_directory(const std::filesystem::path &p, (2)(since C++ 17) const std::filesystem::path &existing_p, std::error_code &ec) noexcept; bool create_directories(const std::filesystem::path &p); (3)(since C++ 17) bool create_directories(const std::filesystem::path &p, std::error_code &ec); 1)…

std::filesystem::copy_symlink – std::filesystem::copy_symlink Synopsis Defined in header<filesystem> void copy_symlink(const std::filesystem::path &from, (1)(since C++ 17) const std::filesystem::path &to); void copy_symlink(const std::filesystem::path &from, const std::filesystem::path &to, (2)(since C++ 17) std::error_code &ec) noexcept; Copies a symlink to another location. 1) Effectively calls f(read_symlink(from), to) where f is create_symlink or create_directory_symlink depending on whether from resolves to a file…