buildroot

[Unit]

Description=Dropbear SSH daemon

After=syslog.target network.target auditd.service

​

[Service]

# If /etc/dropbear is a symlink to /var/run/dropbear, and

#   - the filesystem is RO (i.e. we can not rm the symlink),

#     create the directory pointed to by the symlink.

#   - the filesystem is RW (i.e. we can rm the symlink),

#     replace the symlink with an actual directory

ExecStartPre=/bin/sh -c '\

if [ -L /etc/dropbear \

     -a "$(readlink /etc/dropbear)" = "/var/run/dropbear" ]; then \

    if rm -f /etc/dropbear >/dev/null 2>&1; then \

        mkdir -p /etc/dropbear; \

    else \

        echo "No persistent location to store SSH host keys. New keys will be"; \

        echo "generated at each boot. Are you sure this is what you want to do?"; \

        mkdir -p "$(readlink /etc/dropbear)"; \

    fi; \

fi'

EnvironmentFile=-/etc/default/dropbear

ExecStart=/usr/sbin/dropbear -F -R $DROPBEAR_ARGS

ExecReload=/bin/kill -HUP $MAINPID

​

[Install]

WantedBy=multi-user.target