# Copyright 2016 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

[Unit]
Description=Chrome OS user interface
PartOf=ui.target
After=ui.target
Before=boot-services.target

# If an unplanned exit had taken place kick in the respawn logic.
OnFailure=ui-respawn.service

[Service]
LimitNICE=40
LimitRTPRIO=10
TimeoutStopSec=20s
KillMode=control-group
Restart=on-success

# Directory where session manager logs are written and prefix of files there.
Environment=UI_LOG_DIR=/var/log/ui
Environment=UI_LOG_FILE=ui.LATEST

# Directory where session manager sets up container roots.
Environment=CONTAINER_ROOT_DIR=/run/containers

# Directory for renderer freezer.
Environment=UI_FREEZER_CGROUP_DIR=/sys/fs/cgroup/freezer/ui
Environment=CHROME_FREEZER_CGROUP_DIR=/sys/fs/cgroup/freezer/ui/chrome_renderers
Environment=UI_CPU_CGROUP_DIR=/sys/fs/cgroup/cpu/ui

# This may be used to wrap the Chrome executable within another command
# instead of calling it directly. The flag's value will be split on whitespace
# into an absolute path and arguments, after which session_manager will add
# Chrome's arguments. For example:
#
# env CHROME_COMMAND_FLAG="--chrome-command=/usr/local/bin/strace /opt/google/chrome/chrome"
Environment=CHROME_COMMAND_FLAG=

ExecStartPre=/usr/share/cros/init/ui-pre-start
ExecStart=/bin/sh -c '/sbin/session_manager "${CHROME_COMMAND_FLAG}">"${UI_LOG_DIR}/${UI_LOG_FILE}" 2>&1'
ExecStartPost=/bin/sh -c "echo $(systemctl show -p MainPID ui | cut -f 2 -d '=')\
	> \"${UI_CPU_CGROUP_DIR}/tasks\""
ExecStartPost=/bin/sh -c "echo $(systemctl show -p MainPID ui | cut -f 2 -d '=')\
	> \"${UI_FREEZER_CGROUP_DIR}/cgroup.procs\""
ExecStopPost=/usr/share/cros/init/ui-post-stop
ExecStopPost=-/usr/bin/systemctl --no-block start logout.service
ExecStopPost=-/usr/bin/systemctl --no-block start shill-stop-user-session.service

[Install]
WantedBy=ui.target