changelog

一个开源的NTP客户端程序

vsntp change log

2004-03-29	version 2.0.0
	 1. vsntp.c: The syhchronization scheduler has been rewritten to
	    allow alternative schedulers, in order to work with the problem
	    reported by Jean-Alain Le Borgne <[e-mail]> 2007-03-26,
	    that sleep() may not return after MS Virtual PC 2007 was suspended
	    for a while.
	 2. vsntp.c: An alternative schedular using alarm() was added in
	    addition to sleep(), based on the contribution by Jean-Alain.
	 3. vsntp.c: New subroutine setsigalrm() was added to set the SIGALRM
	    signal handler.
	 4. vsntp.c: New subroutine alarm_wakeup() was added as the alarm()
	    schedular.
	 5. vsntp.c: Two new constants SCHEDULER_SLEEP and SCHEDULER_ALARM were
	    added as the scheduler choices of the user.
	 6. vsntp.c: Two new switches -a/--alarm and -s/--sleep were added for
	    the user to choose the scheduler.  The default is currently -s.
	 7. vsntp.c: New variable "scheduler" added to as the scheduler choice
	    of the user.
	 8. vsntp.c: Variable "next" was made global so that the alarm()
	    scheduler can access it, too.
	 9. vsntp.c: Check the return value of synctime() so that skip logging
	    when time was not adjusted (time correct or network error).
	10. vsntp.c: Logging of time synchronization after the first time
	    was added, in log level LOG_DEBUG.
	11. vsntp.c: errstart is now calculated and maintained in synctime()
	    instead of neterror(), in order to log the time sequence of the
	    network errors.
	12. vsntp.c: Re-formatting error messages and warnings according to
	    the GNU Coding Standards, as:
	      source-file-name:lineno: message
            Refer to: http://www.gnu.org/prep/standards/html_node/Errors.html
	13. vsntp.c: Added logging before connect(), send() and recv() at
	    log level LOG_DEBUG in order to know the current progress when
	    debugging network problems.
	14. vsntp.c: Added logging of value t1, t2, t3, t4 and toff in log
	    level LOG_DEBUG in order to debug time calculation problems.
	15. vsntp.c: New subroutine xsigemptyset() was added to run
	    sigemptyset() and handle its error.  setsigalrm() was updated
	    to use xsigemptyset() instead of sigemptyset().
	16. vsntp.c: New subroutine xsigaction() was added to run sigaction()
	    and handle its error.  setsigalrm() was updated to use xsigaction()
	    instead of sigaction().
	17. vsntp.c: English comment fix.  "... and handle errors" was updated
	    as "... and handle its error."
	18. configure.ac: Added AC_TYPE_SSIZE_T, and added "alarm()" in
	    AC_CHECK_FUNCS, acccording to the suggestion by automake 1.9.6.
	19. configure.in and aclocal.m4: Regenrated using automake 1.9.6.
	20. configure: Regenrated using autoconf 2.61.
	21. vsntp.c: Added conditional #ifdef, so that if alarm() is not
	    supported on the target platform the alarm() scheduler will not
	    be compiled.
	22. vsntp.c: A new constant DEFAULT_SCHEDULER was added as the
	    default scheduler.
	23. Added init.d directory, with a Debian SysV init script, a Red Hat
	    SysV init script, a configuration file used by the init scripts,
	    and README in 3 languages.
	24. Added doc directory, and moved vsntp.texi, vsntp.8 and rfc1769.txt
	    inside.
	25. vsntp.c: Fixed the basic profile in the beginning comment, from
	    synctime.c to vsntp.c.  That was the first name of vsntp.  It was
	    renamed for years.
	26. vsntp.8: Fixed the BUGS chapter, replacing the originall text with
	    the SourceForge users' mailing list information.
	27. README, vsntp.8 and vsntp.texi: Added notes about the scheduler
	    issue.
	28. README, vsntp.8 and vsntp.texi: Added notes about how to debug.
	29. README, vsntp.8 and vsntp.texi: Added notes about portability.
	30. README, vsntp.8 and vsntp.texi: Added requests to users to let me
	    know that someone is using vsntp. :p

2004-01-14	version 1.1.1
	Documentation fix.
	 1. ChangeLog and NEWS year typo fixed. (2003 -> 2004)
	 2. Home site at SourceForge done.
	 3. Documentation revised on official website, other reference
	    information.
	 4. Documentation revised on wordings and typos.

2004-01-13
	 1. HTML page at Tavern IMACAT's done.
	 2. texinfo document revised.

2004-01-12	version 1.1.0
	First public release.
	 1. Added texinfo documentation.
	 2. Added -i and -p switch.
	 3. Default synchronization interval changed to 900 seconds, do avoid
	    making troubles with foreign NTP servers.

2004-01-11
	 1. Added automake and autoconf.
	 2. Added documentation: README, INSTALL, COPYING, ChangeLog, NEWS,
	    AUTHORS, THANKS, and manpage.

2004-01-10
	 1. The SourceForge project space approved.

2004-01-09
	 1. Applying a SourceForge project space.

2003-12-24	version 1.0.0
	Finalized.
	 1. Program name changed from "synctime" to "vsntp".
	 2. Protocol changed from RFC 868 Time to RFC 1769 SNTP.
	 3. Synchronization interval shortened to 5 seconds.

2003-12-23
	Start writing, with a name as "synctime".