[Unit]
Description=Anonymizing overlay network for TCP (instance %i)
After=network-online.target nss-lookup.target
PartOf=tor.service
ReloadPropagatedFrom=tor.service

[Service]
Type=notify
NotifyAccess=all
PIDFile=/run/tor-instances/%i/tor.pid
PermissionsStartOnly=yes
ExecStartPre=/usr/bin/install -Z -m 02755 -o _tor-%i -g _tor-%i -d /run/tor-instances/%i
ExecStartPre=/bin/sed -e 's/@@NAME@@/%i/g; w /run/tor-instances/%i.defaults' /usr/share/tor/tor-service-defaults-torrc-instances
ExecStartPre=/usr/bin/tor --defaults-torrc /run/tor-instances/%i.defaults -f /etc/tor/instances/%i/torrc --verify-config
ExecStart=/usr/bin/tor --defaults-torrc /run/tor-instances/%i.defaults -f /etc/tor/instances/%i/torrc
ExecReload=/bin/kill -HUP ${MAINPID}
KillSignal=SIGINT
TimeoutStartSec=300
TimeoutStopSec=60
Restart=on-failure
LimitNOFILE=65536

# Hardening
NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
ProtectHome=yes
ProtectSystem=full
ReadOnlyDirectories=/
# We would really like to restrict the next item to [..]/%i but we can't,
# as systemd does not support that yet.  See also #781730.
ReadWriteDirectories=-/var/lib/tor-instances
ReadWriteDirectories=-/run
CapabilityBoundingSet=CAP_SETUID CAP_SETGID CAP_NET_BIND_SERVICE CAP_DAC_READ_SEARCH

[Install]
WantedBy=multi-user.target