Real-time scheduling and memory locking is available on posix compliant
OSs. This patch centralizes this functionality and brings support to
FreeBSD, NetBSD, and Solaris.
[ML: updated coding style]
Add a new set of tests for testing basic functionality, starting chronyd
with root privileges on the actual system instead of the simulator.
Tests numbered in the 100-199 range are considered destructive and
intended to be used only on machines dedicated for development or
testing. They are started by the run script only with the -d option.
They may adjust/step the system clock and other clocks, block the RTC,
enable HW timestamping, create SHM segments, etc.
Other tests should not interfere with the system and should work even
when another NTP server/client is running.
Fix an issue with Linux and musl libc where sched_setscheduler is not
implemented. It seems that pthread_setschedparam is more widely
supported across different C libraries and OSs. For our use case, it
should make no difference which call is used.
On FreeBSD, sendmsg() fails when IP_SENDSRCADDR specifies a source
address on a socket that is bound to the address. This prevents a server
configured with the bindaddress directive from responding to clients.
Add a new variable to check whether the server IPv4 socket is not bound
before setting the source address.
A new ioctl will probably be added in Linux 4.21. It should enable a
significantly more accurate measurement of the offset between PHC and
system clock.
Don't forget to include the length of the frame check sequence (FCS) in
the RX timestamp transposition when the L2 length of the received packet
is from SCM_TIMESTAMPING_PKTINFO.
This fixes commit 934d4047f1.
Instead of linking unit tests with *.o in the root directory, which may
include conflicting objects from a different configuration (e.g. hash),
add a print target to the main Makefile and use it in the unit test
Makefile to link only with objects that are relevant in the current
configuration.
The example spec file was too limited to be recommended for use in any
rpm-based distribution, e.g. it didn't configure chronyd to drop the
root privileges.
Users that want to build a package from the latest source code should
start with the official package of their distribution.
FreeBSD doesn't support IP_PKTINFO. Instead it provides IP_RECVDSTADDR
and IP_SENDSRCADDR, which can be used to get/set the destination/source
address.
In future IP_RECVIF and IP_SENDIF may be supported to get and set also
the interface.
