File ptp4l.service of Package linuxptp

[Unit]
Description=PTP: Boundary/Ordinary Clock

[Service]
# added automatically, for details please see
# https://en.opensuse.org/openSUSE:Security_Features#Systemd_hardening_effort
ProtectSystem=full
ProtectHome=true
ProtectHostname=true
ProtectKernelTunables=true
ProtectKernelModules=true
ProtectKernelLogs=true
ProtectControlGroups=true
RestrictRealtime=true
DevicePolicy=closed
DeviceAllow=/dev/rtc rwm
DeviceAllow=char-ptp rwm
DeviceAllow=/dev/ptp0 rwm
# end of automatic additions 
Type=simple
EnvironmentFile=-/etc/sysconfig/ptp4l
ExecStart=/usr/sbin/ptp4l $OPTIONS

[Install]
WantedBy=multi-user.target