# Service unit to apply control program identification (CPI) settings
#
# Copyright IBM Corp. 2017
#
# s390-tools is free software; you can redistribute it and/or modify
# it under the terms of the MIT license. See LICENSE for details.
#

[Unit]
Description=Apply Control Program Identification (CPI)
DefaultDependencies=no
Conflicts=shutdown.target
After=local-fs.target
ConditionPathIsReadWrite=/sys/firmware/cpi

[Service]
Type=oneshot
#
# Specify a file with the environment variables using the EnvironmentFile=
# service property.
#
EnvironmentFile=/etc/sysconfig/cpi
#
# Alternatively, you can specify the environment variables directly,
# using the Environment= service properties, which can be overridden by
# "systemctl edit --full cpi".
# In this case, the EnvironmentFile= needs to be commented out, otherwise
# it would override the directly specified variables.
#
# The sysplex name, system name, and system type consist of up to eight
# characters of the following set: A-Z, 0-9, $, @, #, and blank.
#
# Environment=CPI_SYSTEM_NAME=
# Environment=CPI_SYSPLEX_NAME=
# Environment=CPI_SYSTEM_LEVEL=
# Environment=CPI_SYSTEM_TYPE=LINUX

#
# Apply settings
ExecStartPre=/bin/sh -c 'if test -n "$CPI_SYSTEM_TYPE"; then echo $CPI_SYSTEM_TYPE |tr a-z A-Z > /sys/firmware/cpi/system_type; fi'
ExecStartPre=/bin/sh -c 'if test -n "$CPI_SYSTEM_NAME"; then echo $CPI_SYSTEM_NAME |tr a-z A-Z > /sys/firmware/cpi/system_name; fi'
ExecStartPre=/bin/sh -c 'if test -n "$CPI_SYSPLEX_NAME"; then echo $CPI_SYSPLEX_NAME |tr a-z A-Z > /sys/firmware/cpi/sysplex_name; fi'
ExecStartPre=/bin/sh -c 'test -n "$CPI_SYSTEM_LEVEL" || CPI_SYSTEM_LEVEL="$(uname -r)" ; echo $CPI_SYSTEM_LEVEL |cut -d- -f1 | tr . " " |xargs printf "0x0000000000%02x%02x%02x\n" > /sys/firmware/cpi/system_level'
#
# Sending data to the HMC/SE
ExecStart=/bin/sh -c 'echo 1 > /sys/firmware/cpi/set'