bootstat/bootstat.rc

# This file is the LOCAL_INIT_RC file for the bootstat command.

# Mirror bootloader boot reason to system boot reason
# ro.boot.bootreason should be set by init already
# before post-fs trigger
on post-fs && property:ro.boot.bootreason=*
    setprop sys.boot.reason ${ro.boot.bootreason}

on post-fs-data
    mkdir /data/misc/bootstat 0700 system log
    # To deal with ota transition resulting from a change in DAC from
    # root.root to system.log, may be deleted after ota has settled.
    chown system log /data/misc/bootstat/absolute_boot_time
    chown system log /data/misc/bootstat/boot_complete
    chown system log /data/misc/bootstat/boot_complete_no_encryption
    chown system log /data/misc/bootstat/boot_reason
    chown system log /data/misc/bootstat/boottime.bootloader.1BLE
    chown system log /data/misc/bootstat/boottime.bootloader.1BLL
    chown system log /data/misc/bootstat/boottime.bootloader.2BLE
    chown system log /data/misc/bootstat/boottime.bootloader.2BLL
    chown system log /data/misc/bootstat/boottime.bootloader.AVB
    chown system log /data/misc/bootstat/boottime.bootloader.KD
    chown system log /data/misc/bootstat/boottime.bootloader.KL
    chown system log /data/misc/bootstat/boottime.bootloader.ODT
    chown system log /data/misc/bootstat/boottime.bootloader.SW
    chown system log /data/misc/bootstat/boottime.bootloader.total
    chown system log /data/misc/bootstat/build_date
    chown system log /data/misc/bootstat/factory_reset
    chown system log /data/misc/bootstat/factory_reset_boot_complete
    chown system log /data/misc/bootstat/factory_reset_boot_complete_no_encryption
    chown system log /data/misc/bootstat/factory_reset_current_time
    chown system log /data/misc/bootstat/factory_reset_record_value
    chown system log /data/misc/bootstat/last_boot_time_utc
    chown system log /data/misc/bootstat/ota_boot_complete
    chown system log /data/misc/bootstat/ota_boot_complete_no_encryption
    chown system log /data/misc/bootstat/ro.boottime.init
    chown system log /data/misc/bootstat/ro.boottime.init.cold_boot_wait
    chown system log /data/misc/bootstat/ro.boottime.init.selinux
    chown system log /data/misc/bootstat/time_since_factory_reset
    chown system log /data/misc/bootstat/time_since_last_boot
    # end ota transitional support

# Initialize bootstat state machine.
#
# sys.bootstat.first_boot_completed: responsible for making sure that record_boot_complete happens
# only once per device hard reboot. Possible values:
#
#   sys.bootstat.first_boot_completed=0 - first boot completed trigger wasn't processed yet.
#   sys.bootstat.first_boot_completed=1 - first boot completed trigger was processed and
#                                         record_boot_complete was called. Subsequent boot completed
#                                         triggers (e.g. due to userspace reboot) won't retrigger
#                                         record_boot_complete
#
# IMPORTANT, ro.persistent_properties.ready=1 trigger is used here to ensure that we initialize
# state machine only once, which as result ensures that bootstat --set_system_boot_reason and
# bootstat --record_boot_complete will be called only once per full reboot.
on property:ro.persistent_properties.ready=true
  setprop sys.bootstat.first_boot_completed 0

# Set boot reason
on property:ro.persistent_properties.ready=true
    # Converts bootloader boot reason and persist.sys.boot.reason to system boot reason
    # Need go after persist peroperties are loaded which is right before zygote-start trigger
    exec_background - system log -- /system/bin/bootstat --set_system_boot_reason

# Record boot complete metrics.
on property:sys.boot_completed=1 && property:sys.bootstat.first_boot_completed=0
    # Record boot_complete and related stats (decryption, etc).
    # Record the boot reason.
    # Record time since factory reset.
    # Log all boot events.
    exec_background - system log -- /system/bin/bootstat --record_boot_complete --record_boot_reason --record_time_since_factory_reset -l
    setprop sys.bootstat.first_boot_completed 1