[Unit]
### see man systemd.unit
Description=Prosody XMPP Server
Documentation=https://prosody.im/doc

[Service]
### See man systemd.service ###
# With this configuration, systemd takes care of daemonization
# so Prosody should be configured with daemonize = false
Type=simple

# Not sure if this is needed for 'simple'
PIDFile=/var/run/prosody/prosody.pid

# Start by executing the main executable
ExecStart=/usr/bin/prosody

ExecReload=/bin/kill -HUP $MAINPID

# Restart on crashes
Restart=on-abnormal

# Set O_NONBLOCK flag on sockets passed via socket activation
NonBlocking=true

### See man systemd.exec ###

WorkingDirectory=/var/lib/prosody

User=prosody
Group=prosody

Umask=0027

# Nice=0

# Set stdin to /dev/null since Prosody does not need it
StandardInput=null

# Direct stdout/-err to journald for use with log = "*stdout"
StandardOutput=journal
StandardError=inherit

# This usually defaults to 4k or so
# LimitNOFILE=1M

## Interesting protection methods
# Finding a useful combo of these settings would be nice
#
# Needs read access to /etc/prosody for config
# Needs write access to /var/lib/prosody for storing data (for internal storage)
# Needs write access to /var/log/prosody for writing logs (depending on config)
# Needs read access to code and libraries loaded

# ReadWriteDirectories=/var/lib/prosody /var/log/prosody
# InaccessibleDirectories=/boot /home /media /mnt /root /srv
# ReadOnlyDirectories=/usr /etc/prosody

# PrivateTmp=true
# PrivateDevices=true
# PrivateNetwork=false

# ProtectSystem=full
# ProtectHome=true
# ProtectKernelTunables=true
# ProtectControlGroups=true
# SystemCallFilter=

# This should break LuaJIT
# MemoryDenyWriteExecute=true