Re: [chrony-users] on MacOSX

On 11 Aug 2015 7:29 pm, toshinao <padoauk@xxxxxxxxx> wrote:

Hi.

This section of code has been removed in git and adjustment is now calculated differently.

It is nice to hear this because one of my small servers is running Mavericks.

2015/08/12 3:16、Bryan Christianson <bryan@whatroute.net> のメール：

Nice that you tried it. Both issues you raised are fixed in git

git clone git://git.tuxfamily.org/gitroot/chrony/chrony.git

On 12/08/2015, at 5:21 am, toshinao <padoauk@gmail.com> wrote:

Hi.

I noticed chrony supports MacOSX recently. There’s no reason not to try. Here’s report of what I found.

To sum up, (1) I have to modify two lines of configure (2) chronyd works fine on 10.10 but not on 10.9,
which may be a minor problem for many users.

(1) Command “echo -n” in configure script must be “/bin/echo -n” to generate correct config.h.
This is same in 10.9 and 10.0. I do know know why.

That issue has been fixed in git.
Workaround is to use 'bash ./configure'. POSIX echo doesn't generate line feeds.

(2) On 10.9, chronyd does not run becuase of Floating point exception. Chronyd runs n 10.10 without
any errors.

# /usr/local/sbin/chronyd -d -d -f /usr/local/etc/chrony.conf
2015-08-11T15:48:40Z main.c:440:(main) chronyd version 2.1.1 starting (+CMDMON +NTP +REFCLOCK -RTC -PRIVDROP -DEBUG +ASYNCDNS +IPV6 -SECHASH)
Floating point exception: 8

# lldb chronyd
(lldb) target create "chronyd"
Current executable set to 'chronyd' (x86_64).
(lldb) run -d -f /usr/local/etc/chrony.conf
Process 7720 launched: ‘/usr/local/sbin/chronyd' (x86_64)
2015-08-11T15:49:39Z chronyd version 2.1.1 starting (+CMDMON +NTP +REFCLOCK -RTC -PRIVDROP -DEBUG +ASYNCDNS +IPV6 -SECHASH)
Process 7720 stopped
* thread #1: tid = 0x743e, 0x000000010001a089 chronyd`start_adjust + 297 at sys_macosx.c:142, queue = 'com.apple.main-thread', stop reason = EXC_ARITHMETIC (code=EXC_I386_DIV, subcode=0x0)
  frame #0: 0x000000010001a089 chronyd`start_adjust + 297 at sys_macosx.c:142
139         tickdelta = 10 * kern_tickadj;
140       else
141         tickdelta = kern_tickadj;
-> 142       if (delta % tickdelta)
143         delta = delta / tickdelta * tickdelta;
144       newadj.tv_sec = 0;
145       newadj.tv_usec = (int)delta;

This section of code has been removed in git and adjustment is now calculated differently.

Regards
Bryan Christianson

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