This directory and its subdirectories contain NTPSec, a security-hardened implementation of Network Time Protocol Version 4. You can browse a summary of differences from legacy NTP here:

https://docs.ntpsec.org/latest/ntpsec.html

The contents of the base directory are given in this file. The contents of subdirectories are usually given in the README files in each subdirectory.

The base directory ./ contains the configuration files, source directories and related stuff:

INSTALL.adoc

Generic installation instructions.

NEWS.adoc

What’s new in this release.

README.adoc

This file.

LICENSES/

License texts in REUSE format. See http://reuse.software

VERSION

The version stamp, to be used by scripts and programs.

attic/

Directory containing source code that is not part of a normal installation. Things can disappear from here at any time.

buildprep

Executable script for fetching installation prerequisites.

contrib/

Directory containing contributed scripts, dragons dwell here. Some of this might eventually move to being supported code.

devel/

Documentation and small tools aimed at developers. Includes a hacking guide and a tour of the internals.

docs/

Directory containing a complete set of documentation on building and configuring a NTP server or client. The files are in asciidoc markup. This replaces the 'html' directory of previous versions, but html can be generated from it.

etc/

Directory containing a motley collection of configuration files and launch scripts for various systems. For example only.

include/

Directory containing include header files used by most programs in the distribution.

libjsmn/

A minimal JSON library used by the GPSD-JSON driver.

libntp/

Directory containing library source code used by most programs in the distribution.

libparse/

This directory contains the files making up the parser for the parse refclock driver. For reasonably sane clocks this refclock drivers allows a refclock implementation by just providing a conversion routine and the appropriate NTP parameters

ntpclients/

Directory containing sources for clients - utility programs to query local and remote NTP installations for log status, state variables, and other timekeeping information. The term "clients" is used quite loosely here; any tool that is not a multi-file C program probably lives in this directory.

ntpd/

Sources for the main time-synchronization daemon.

ntpfrob/

The ntpfrob utility collects several small diagnostic functions for reading and tweaking the local clock hardware, including reading the clock tick rate, precision, and jitter.

ntptime/

Directory containing a utility for reading and modifying kernel parameters related to the local clock.

packaging/

Parts and guidance for distribution packagers.

pylib/

Installable Python helper modules for scripts.

tests/

Self-test code.

waf

A copy of the waf builder. This is the engine used to configure and build the codebase.

wafhelpers/

A library of Python procedures used by the waf build system.

wscript

NTP-specific waf rules.

www/

Sample ntpviz files