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# Last Modified: Sat Jan 20 10:45:05 2018
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#include <tunables/global>
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/usr/sbin/chronyd flags=(attach_disconnected) {
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#include <abstractions/base>
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#include <abstractions/nameservice>
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# For /run/chrony to be created
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capability chown,
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# Give “root” the ability to read and write the PID file
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capability dac_override,
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capability dac_read_search,
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# Needed to support HW timestamping
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capability net_admin,
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# Needed to allow NTP server sockets to be bound to a privileged port
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capability net_bind_service,
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# Needed to allow an NTP socket to be bound to a device using the
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# SO_BINDTODEVICE socket option on kernels before 5.7
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capability net_raw,
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# Needed to drop privileges
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capability setgid,
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capability setuid,
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# Needed to set the SCHED_FIFO real-time scheduler at the specified priority
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# using the '-P' option
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capability sys_nice,
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# Needed to lock chronyd into RAM
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capability sys_resource,
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# Needed to set the system/real-time clock
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capability sys_time,
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/usr/sbin/chronyd mr,
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/etc/chrony/{,**} r,
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/var/lib/chrony/{,*} rw,
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/var/log/chrony/{,*} rw,
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@{run}/chrony/{,*} rw,
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@{run}/chrony-dhcp/{,*} r,
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# Using the “tempcomp” directive gives chronyd the ability to improve
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# the stability and accuracy of the clock by compensating the temperature
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# changes measured by a sensor close to the oscillator.
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@{sys}/class/hwmon/hwmon[0-9]*/temp[0-9]*_input r,
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@{sys}/devices/virtual/thermal/thermal_zone[0-9]*/hwmon[0-9]*/temp[0-9]*_input r,
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# Support all paths suggested in the man page (LP: #1771028). Assume these
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# are common use cases; others should be set as local include (see below).
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# Configs using a 'chrony.' prefix like the tempcomp config file example
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/etc/chrony.* r,
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# Example gpsd socket is outside @{run}/chrony/
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@{run}/chrony.tty{,*}.sock rw,
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# To sign replies to MS-SNTP clients by the smbd daemon
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/var/lib/samba/ntp_signd/socket rw,
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# rtc
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/etc/adjtime r,
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/dev/rtc{,[0-9]*} rw,
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# gps devices
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/dev/pps[0-9]* rw,
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/dev/ptp[0-9]* rw,
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# Allow reading the chronyd configuration file that timemaster(8) generates
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@{run}/timemaster/chrony.conf r,
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# For use with clocks that report via shared memory (e.g. gpsd),
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# you may need to give ntpd access to all of shared memory, though
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# this can be considered dangerous. See https://launchpad.net/bugs/722815
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# for details. To enable, add this to local/usr.sbin.chronyd:
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# capability ipc_owner,
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# Site-specific additions and overrides. See local/README for details.
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#include <local/usr.sbin.chronyd>
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}
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