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Change Log

All notable changes to the project are documented in this file. Changes to Larry's upstream version are interleaved.

v3.1 - 2022-03-13

Changes

  • Slightly improved log messages when failing to resolve DNS names
  • Update co-author's last name, changed from Nilsson to Wiberg 2021
  • Update systemd unit file with new name for manual page, and make sure to include it in distribution archives

Fixes

  • Call res_init() when retrying resolving DNS names, this fixes long hangs in setup_socket() which sntpd seemingly never recover from. This in turn caused it to not respond to SIGTERM properly, while in this state (init)
  • When either of bind() or connect() fail in setup_socket(), return back to main loop() to handle retries, and catch signals
  • Add missing adjtimex.1 to distribution archives

v3.0 - 2020-03-22

First release as sntpd, with support for both acting as a (very limited) server and a client. It is a "multicall" binary where it can be called as ntpclient to simulate the behavior of the original ntpclient.

Changes

  • Initial support for a very limited server mode, enabled by default on port 123. The server reports itself as strata 1 and LOCL clock. The root delay and root dispersion calculation is rough at best. Much of the server calculation is inspired by the BusyBox ntpd, please use that one instead
  • Changes to Debian packaging, adjtimex is now in its own .deb
  • New, stripped down, command line options when called as sntpd
  • Updates to man page, new name and separate command line options
  • Drop OpenWRT mini-ntpclient.c from project, with configure option
  • Drop --disable-syslog configure option
  • Drop support for really old systems, no more gettimeofday()

Fixes

  • Fix #4: Rename project from ntpclient to sntpd to avoid confusion with the original ntpclient. This change also restores original command line options, and semantics, when called with the name ntpclient
  • Fix man page spelling errors, found by lintian
  • Add workaround for missing SIGGSTAMP on Linux 5.1 and later
  • Fix issues found by Coverity Scan:
    • check return value of send()
    • handle uninitialized socket

2018_244 - 2018-09-01

Changes

  • Add HOWTO.md to distribution and install into docs

Fixes

  • Issue #3: Open network socket using the address family returned by the hostname, or address, lookup. Fix by Laura Fang

2018_176 - 2018-06-25

The Stuttgart release. Curated by Joachim Wiberg.

Changes

  • NTP server argument is now optional, default: pool.ntp.org
  • Restore .tar.gz archives for make dist and release
  • Make .deb file part of release
  • Cleanup and simplify README
  • Renmed doc/ to docs/
  • Moved TODO and CONTRIBUTING.md to docs/

Fixes

  • Issue #2: Missing fallback to IPv4 on systems with IPv6 disbled

2017_246 - 2017-09-03

Curated by Joachim Wiberg.

Changes

  • Log successful resolve of NTP host when network has been down
  • Add support for building .deb package

Fixes

  • Fix build warnings
  • Define _DEFAULT_SOURCE, needed with newer GLIBC
  • Do not overload in6addr_any, exists in netinet/in.h

2017_217 - 2017-08-05

Curated by Joachim Wiberg.

Changes

  • Add support for IPv6, thanks to Dieter Ries
  • Behavior change: -L now required with -n, otherwise stdout is used. This to conform with de facto UNIX daemon behavior.
  • Convert to GNU Configure & Build System, with proper --enable-opts for all optional features, like precision and mini NTP client
  • Relocate files to doc/ and src/ subdirectories
  • Reindent to Linux kernel coding style and add CONTRIBIBUTING.md to help newcomers with basic project info
  • Cleanup README and HOWTO, move to Markdown format for comfortable presentation on GitHub.
  • Update and refactor ntpclient.8 and adjtimex.1 into mdoc format
  • Move change log from README to separate CHANGELOG file in a format proposed by http://keepachangelog.com/
  • Merge in changes from 2015_365 by Larry
  • Add missing COPYING file, GNU license should be included
  • Add systemd unit file for running ntpclient as a daemon
  • Add initial Debian packaging to be able to create .deb files

Fixes

  • Massive cleanup and build fixes to to mini-ntpclient.c from DD-WRT
  • Fix compiler warnings for unused variables when ENABLE_DEBUG is unset
  • Fix build error when building without ENABLE_SYSLOG support
  • Fixes for non-GNU libc systems, replace %m and __progname
  • Retry DNS lookup of NTP server, useful at boot and if net goes down
  • Restart/reopen network socket at least once a day to prevent lockup

2015_365 - 2015-12-31

Curated by Larry Doolittle. Changes since ntpclient_2010_365.tar.gz, http://doolittle.icarus.com/ntpclient/ntpclient_2015_365.tar.gz

Changes

  • Tweak coding style to work better with modern compilers (e.g., gcc-gcc-4.9.2 and clang-3.5.0)
  • Make c99 the default
  • List more warning flags in disabled part of Makefile
  • Minor whitespace, parenthesis, and spelling changes in source files
  • Move _POSIX_C_SOURCE and _BSD_SOURCE to Makefile

Fixes

  • Fixed and re-enabled -DPRECISION_SIOCGSTAMP, seems to work properly with modern (e.g., 3.x or 4.x) Linux kernel
  • use LDLIBES instad of LDFLAGS for -lrt in Makefile (thanks, ChristophGr)

2010_365 - 2010-12-31

Curated by Larry Doolittle. Changes since ntpclient_2007_365.tar.gz. http://doolittle.icarus.com/ntpclient/ntpclient_2010_365.tar.gz

Changes

  • Include netdb.h and always define _BSD_SOURCE to get herror()
  • Minor formatting to align with Nilsson's fork
  • add -fno-strict-aliasing as needed by traditional network coding style

Fixes

  • Fixed type of sa_xmit_len, thanks Mike Frysinger
  • Dropped underscores in spelling of adjtimex(2), might make uClibc happier

2010_326 - 2010-11-22

Changes

  • Allow hostname, instead of IP, to be supplied without -h

Fixes

  • Fix one-shot sync using -s, broke in previous release.

2010_323 - 2010-11-19

Curated by Joachim Wiberg.

Changes

  • Support for resync with server on SIGHUP
  • Create .md5 file as well during make dist

2010_300 - 2010-10-27

Curated by Joachim Wiberg.

Changes

  • Prefix all log messages with "ntpclient:"
  • Merge the adnyw.patch
  • Refactor logging to stdout/syslog using one logit() function
  • Support for daemonizing ntpclient by default if run as root, assumes syslog output.
  • Add mini-ntpclient, a very small ntpclient from DD-WRT.

Fixes

  • Fix adjtimex() compile error on uClibc, from OpenEmbedded

2007_365 - 2007-12-31

Curated by Larry Doolittle.

Changes

  • Adjustable min_delay parameter, used to be hard-coded 800 microseconds
  • Remove useless listen() call, thanks to Alexander Indenbaum
  • Tidy up 32-bit integer declarations, prodding from Brian McAllister
  • Added rate2.awk, contributed by Lou Sortman
  • Provide easy way to override 15 second MIN_INTERVAL at compile time
  • Relax MIN_INTERVAL enforcement for one-shot use, thanks to Mihai Buha

Fixes

  • Fix length passed to recvfrom(), thanks to Alexander Indenbaum

2006_318 - 2006-11-14 [YANKED]

Curated by Larry Doolittle.

Changes

  • Default build is now -std=c99, but c89 sill works too
  • Switch default compile from gettimeofday() to POSIX clock_gettime()
  • More sanity checking on the NTP reply packet, reference RFC 4330
  • Fractional second printing in debug output changed to traditional decimal
  • New -f switch to set initial frequency
  • Works to specify both -s and -l, will jump-set first and then phase lock
  • New man page, contributed by Walter Harms
  • Most subroutines are now flagged static to the compiler
  • Structural changes to the code, such as the new ntpclient.h file
  • Dropped (mostly) obsolete patches from Linksys and Andy Warner

Fixes

  • Bug fix for select() error handling, thanks to Walter Harms

2003_194 - 2003-07-13 [YANKED]

Curated by Larry Doolittle.

  • New -g option (has had limited testing)
  • Changed max frequency adjustment from 91 ppm to 150 ppm
  • Fixed "inconsistent" bug in phaselock.c triggered by large freq errors
  • New files: HOWTO, adjtimex.c, adjtimex.1, rate.awk, log2date.pl
  • Minor source code cleanups
  • Source is now as 64-bit clean as practical; tested on Alpha
  • Optional patches provided by Andy Warner, see andyw.patch
  • Optional patches provided by Linksys, see linksys.patch
  • Removed unreasonable 15020 day offset in date column (xntpd has this offset, which turns days-since-1900-epoch into Modified Julian Day)