Add a s6-rc role

roles/s6-rc/handlers/main.yml

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+---
+- name: Reload /etc/ttys
+  command: kill -HUP 1

roles/s6-rc/tasks/main.yml

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+---
+- name: Install packages
+  package:
+    name: s6-rc
+
+- name: Create s6-rc directories
+  file:
+    path: '{{ item }}'
+    state: directory
+    owner: root
+    group: wheel
+    mode: 0755
+  with_items:
+    - /etc/s6-rc
+    - /etc/s6-rc/service
+    - /etc/s6-rc/service/enabled
+
+- name: Define enabled services bundle
+  copy:
+    dest: /etc/s6-rc/service/enabled/type
+    content: bundle
+    owner: root
+    group: wheel
+    mode: 0444
+
+- name: Default to an empty set of enabled servics
+  file:
+    path: /etc/s6-rc/service/enabled/contents
+    state: touch
+    owner: root
+    group: wheel
+    mode: 0644
+  changed_when: false
+
+- name: Pick a UUID
+  command: uuidgen
+  register: uuidgen
+  changed_when: false
+
+- name: Expose the UUID as fact
+  set_fact:
+    s6_uuid: '{{ uuidgen.stdout }}'
+  changed_when: false
+
+- name: Compile the s6 service definitions
+  command: >
+    s6-rc-compile -v 2 .compiled.{{ s6_uuid }} service
+  args:
+    creates: /etc/s6-rc/compiled
+    chdir: /etc/s6-rc
+
+- name: Link to the latest service database
+  command: >
+    env ln -shf .compiled.{{ s6_uuid }} compiled
+  args:
+    creates: /etc/s6-rc/compiled
+    chdir: /etc/s6-rc
+
+- name: Make sure that tmpfs support is loaded early
+  lineinfile:
+    path: /boot/loader.conf
+    regexp: '^tmpfs_load='
+    line: 'tmpfs_load="YES"'
+
+- name: Add /run to fstab
+  mount:
+    path: /run
+    src: tmpfs
+    fstype: tmpfs
+    opts: rw,size=128m,mode=755
+    state: mounted
+
+- name: Generate s6-svscan startup script
+  template:
+    dest: /etc/s6-rc/scan
+    src: scan.j2
+    owner: root
+    group: wheel
+    mode: 0555
+
+- name: Start s6-svscan from /etc/ttys
+  lineinfile:
+    path: /etc/ttys
+    regexp: '^null'
+    line: 'null    "/etc/s6-rc/scan"               vt100   on secure'
+  notify:
+    - Reload /etc/ttys
+
+- name: Install s6-rc rc.d script
+  template:
+    dest: /usr/local/etc/rc.d/s6-rc
+    src: s6-rc.j2
+    owner: root
+    group: wheel
+    mode: 0555
+
+- name: Flush handlers
+  meta: flush_handlers
+
+- name: Starting s6-rc
+  service:
+    name: s6-rc
+    state: started
+    enabled: yes
+
+- name: Create s6-log group
+  group:
+    name: s6-log
+    gid: 20000
+
+- name: Create s6-log user
+  user:
+    name: s6-log
+    uid: 20000
+    group: s6-log
+    create_home: no
+    home: /var/empty
+    shell: /bin/sh
+

roles/s6-rc/templates/s6-rc.j2

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+#!/bin/sh
+# {{ ansible_managed }}
+
+# PROVIDE: s6-rc
+# REQUIRE: NETWORKING daemon
+# KEYWORD: shutdown
+
+. /etc/rc.subr
+
+export PATH="$PATH:/usr/local/bin:/usr/local/sbin"
+
+name=s6-rc
+rcvar=s6_rc_enable
+extra_commands="reload"
+
+start_cmd="s6_rc_start &"
+stop_cmd="s6_rc_stop"
+reload_cmd="s6_rc_reload"
+status_cmd="s6_rc_status"
+
+s6_timeout=300 # seconds
+up_timeout=300000 # milliseconds
+down_timeout=300000 # milliseconds
+update_timeout=300000 # milliseconds
+
+s6_wait()
+{
+	local i=0
+
+	while ! s6-svscanctl -z /run/service 2>/dev/null; do
+		if [ $i -ge $s6_timeout ]; then
+			echo "Timeout waiting for s6-svscan." >&2
+			return 1
+		fi
+		if [ $i -eq 0 ]; then
+			echo -n "Waiting for s6-svscan." >&2
+		else
+			echo -n . >&2
+		fi
+		sleep 1
+		i=$((i + 1))
+	done
+	if [ $i -gt 0 ]; then
+		echo >&2
+	fi
+	return 0
+}
+
+s6_rc_init()
+{
+	if [ ! -e /run/s6-rc ]; then
+		s6-rc-init /run/service
+	fi
+}
+
+s6_rc_up()
+{
+	s6-rc -v 2 -u -t $up_timeout change enabled
+}
+
+s6_rc_down()
+{
+	s6-rc -v 2 -d -a -t $down_timeout change
+}
+
+s6_rc_start()
+{
+	if ! s6_wait; then
+		return 1
+	fi
+
+	s6_rc_init
+	s6_rc_up
+}
+
+s6_rc_stop()
+{
+	s6_rc_down
+}
+
+s6_rc_reload()
+{
+	local uuid="$(uuidgen)"
+
+	cd /etc/s6-rc
+	echo "Compiling new s6-rc service database."
+	s6-rc-compile -v 2 ".compiled.$uuid" service
+
+	if s6-rc-update -v 2 -t $update_timeout "/etc/s6-rc/.compiled.$uuid"; then
+		ln -shf ".compiled.$uuid" compiled
+		echo "Updated s6-rc service database."
+	fi
+
+	echo "Deleting old service databases."
+	find -s . -mindepth 1 -maxdepth 1 -type d -name '.compiled.*' -not -name ".compiled.$uuid" -print0 | xargs -0 rm -r
+}
+
+s6_rc_status()
+{
+	local result=0
+
+	if s6-svscanctl -z /run/service 2>/dev/null; then
+		echo "The s6-svscan supervisor is responsible."
+	else
+		echo "The s6-svscan supervisor is unavailable."
+		result=1
+	fi
+
+	if [ -e /run/s6-rc ]; then
+		echo "The s6-rc service manager is initialized."
+
+		echo
+		echo "These services are currently active:"
+		s6-rc -a list
+	else
+		echo "The s6-rc service manager is uninitalized."
+		result=1
+	fi
+
+	return $result
+}
+
+load_rc_config $name
+run_rc_command "$1"

roles/s6-rc/templates/scan.j2

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+#!/bin/sh -e
+
+export PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/root/bin
+
+install -d -o root -g wheel -m 755 /run/service
+exec s6-svscan -s /run/service