# std::filesystem::directory_entry::refresh

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< cpp‎ | filesystem‎ | directory entry

void refresh(); void refresh( std::error_code& ec ) noexcept; |  | (since C++17)

Examines the filesystem object referred to by this directory entry and stores its attributes for retrieval with `status()`, `exists()`, `is_regular_file()`, and other status accessors.

If an error occurs, the value of any cached attributes is unspecified

### Parameters

ec | - | out-parameter for error reporting in the non-throwing overload

### Return value

(none)

### Exceptions

The overload that does not take a std::error_code& parameter throws `filesystem_error` on underlying OS API errors, constructed with `p` as the first path argument and the OS error code as the error code argument. The overload taking a std::error_code& parameter sets it to the OS API error code if an OS API call fails, and executes ec.clear() if no errors occur. Any overload not marked `noexcept` may throw std::bad_alloc if memory allocation fails.

### Notes

Many low-level OS APIs for directory traversal retrieve file attributes along with the next directory entry. The constructors and the non-const member functions of `directory_iterator` store these attributes, if any, in the pointed-to `directory_entry` without calling `directory_entry::refresh`, which makes it possible to examine the attributes of the directory entries as they are being iterated over, without making additional system calls.

### Example

| This section is incomplete Reason: no example

### See also

status symlink_status | status of the file designated by this directory entry symlink_status of the file designated by this directory entry (public member function)
exists | checks whether directory entry refers to existing file system object (public member function)
is_block_file | checks whether the directory entry refers to block device (public member function)
is_character_file | checks whether the directory entry refers to a character device (public member function)
is_directory | checks whether the directory entry refers to a directory (public member function)
is_fifo | checks whether the directory entry refers to a named pipe (public member function)
is_other | checks whether the directory entry refers to an other file (public member function)
is_regular_file | checks whether the directory entry refers to a regular file (public member function)
is_socket | checks whether the directory entry refers to a named IPC socket (public member function)
is_symlink | checks whether the directory entry refers to a symbolic link (public member function)
file_size | returns the size of the file to which the directory entry refers (public member function)
hard_link_count | returns the number of hard links referring to the file to which the directory entry refers (public member function)
last_write_time | gets or sets the time of the last data modification of the file to which the directory entry refers (public member function)

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