1.3. Filesystem API

The Filesystem API provides file system utilities.

Functions

function isdir(string path)

Check if the specified path is a directory.

Parameters:

path – to check.

Returns:

true if it’s a direcory, false otherwise.

function mkdir(string path)

Create the specified directory structure.

Parameters:

path – the directory tree to create.

Returns:

true on success, false otherwise.

function notEmptyFile(string filename)

Check if the specified file is not empty.

Parameters:

filename – the file to check.

Returns:

true if file is not empty, false otherwise.

function exists(string path)

Check if the specified file or directory exists.

Parameters:

path – the path to check.

Returns:

true if the path exists, false otherwise.

function fileLastChange(string filename)

Get the last time the specified file has changed.

Parameters:

filename – the file to query.

Returns:

last modification time on success, -1 otherwise.

function readdir(string path)

List directory files and dirs contents.

Parameters:

path – the directory to traverse.

Returns:

table (entry_name -> entry_name) on success, nil otherwise.

function rmdir(string path)

Recursively remove a file or directory.

Parameters:

path – the path to remove.

function dumpBinaryFile(string path)

Dump a file contents to the webserver.

Parameters:

path – the file path.

function setDefaultFilePermissions(string file_path)

Set the default ntopng file permissions on the given path.

Note

this function can fix some permission mismatches on Ubuntu 18.

Parameters:

file_path – the path to the file

function deleteOldRRDs(string ifpath, int deadline)

Delete RRDs older than the specified deadline.

Parameters:

• ifpath – starting path for the delete operation

• deadline – maximum modification date for the files