poky/meta/recipes-connectivity/openssh/openssh/sshd@.service

[Unit]
Description=OpenSSH Per-Connection Daemon
After=sshdgenkeys.service

[Service]
Environment="SSHD_OPTS="
EnvironmentFile=-/etc/default/ssh
ExecStart=-@SBINDIR@/sshd -i $SSHD_OPTS
StandardInput=socket
KillMode=process