184 lines
6.1 KiB
Plaintext
184 lines
6.1 KiB
Plaintext
# Copyright (C) 2021 The Android Open Source Project
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#
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# init.rc for microdroid. This contains a minimal script plus basic service definitions (e.g. apexd)
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# needed for microdroid to run.
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# TODO(b/179340780): support APEX init scripts
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#
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# IMPORTANT: Do not create world writable files or directories.
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# This is a common source of Android security bugs.
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#
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import /init.environ.rc
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# Cgroups are mounted right before early-init using list from /etc/cgroups.json
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on early-init
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# set RLIMIT_NICE to allow priorities from 19 to -20
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setrlimit nice 40 40
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start ueventd
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# Generate empty linker config to suppress warnings
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write /linkerconfig/ld.config.txt \#
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chmod 644 /linkerconfig/ld.config.txt
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# Applies debug policy to decide whether to enable adb, adb root, and logcat.
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# We don't directly exec the binary to specify stdio_to_kmsg.
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exec_start init_debug_policy
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on init
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mkdir /mnt/apk 0755 system system
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mkdir /mnt/extra-apk 0755 root root
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# Microdroid_manager starts apkdmverity/zipfuse/apexd
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start microdroid_manager
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# restorecon so microdroid_manager can create subdirectories
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restorecon /mnt/extra-apk
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# Wait for apexd to finish activating APEXes before starting more processes.
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# Microdroid starts apexd in VM mode in which apexd doesn't wait for init after setting
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# apexd.status to activated, but immediately transitions to ready. Therefore, it's not safe to
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# wait for the activated status, by the time this line is reached it may be already be ready.
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wait_for_prop apexd.status ready
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perform_apex_config
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# Notify to microdroid_manager that perform_apex_config is done.
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# Microdroid_manager shouldn't execute payload before this, because app
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# payloads are not designed to run with bootstrap bionic
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setprop apex_config.done true
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on property:microdroid_manager.init_done=1
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# Stop ueventd to save memory
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stop ueventd
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on init && property:ro.boot.microdroid.debuggable=1
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# Mount tracefs (with GID=AID_READTRACEFS)
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mount tracefs tracefs /sys/kernel/tracing gid=3012
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on property:init_debug_policy.adbd.enabled=1
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start adbd
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# Mount filesystems and start core system services.
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on late-init
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trigger early-fs
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# Mount fstab in init.{$device}.rc by mount_all command. Optional parameter
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# '--early' can be specified to skip entries with 'latemount'.
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# /system and /vendor must be mounted by the end of the fs stage,
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# while /data is optional.
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trigger fs
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trigger post-fs
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# Mount fstab in init.{$device}.rc by mount_all with '--late' parameter
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# to only mount entries with 'latemount'. This is needed if '--early' is
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# specified in the previous mount_all command on the fs stage.
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# With /system mounted and properties form /system + /factory available,
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# some services can be started.
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trigger late-fs
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# Wait for microdroid_manager to finish setting up sysprops from the payload config.
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# Some further actions in the boot sequence might depend on the sysprops from the payloag,
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# e.g. microdroid.config.enable_authfs configures whether to run authfs_service after
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# /data is mounted.
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wait_for_prop microdroid_manager.config_done 1
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trigger post-fs-data
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# Load persist properties and override properties (if enabled) from /data.
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trigger load_persist_props_action
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trigger early-boot
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trigger boot
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on post-fs
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# Once everything is setup, no need to modify /.
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# The bind+remount combination allows this to work in containers.
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mount rootfs rootfs / remount bind ro nodev
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# TODO(b/185767624): change the hard-coded size?
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mount tmpfs tmpfs /data noatime nosuid nodev noexec rw size=128M
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# We chown/chmod /data again so because mount is run as root + defaults
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chown system system /data
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chmod 0771 /data
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# We restorecon /data in case the userdata partition has been reset.
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restorecon /data
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# set up misc directory structure first so that we can end early boot
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# and start apexd
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mkdir /data/misc 01771 system misc
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# work around b/183668221
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restorecon /data/misc
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mkdir /data/misc/authfs 0700 root root
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on late-fs && property:ro.debuggable=1
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# Ensure that tracefs has the correct permissions.
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# This does not work correctly if it is called in post-fs.
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chmod 0755 /sys/kernel/tracing
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chmod 0755 /sys/kernel/debug/tracing
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on post-fs-data
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mark_post_data
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mkdir /data/vendor 0771 root root
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mkdir /data/vendor_ce 0771 root root
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mkdir /data/vendor_de 0771 root root
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mkdir /data/vendor/hardware 0771 root root
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# Start tombstoned early to be able to store tombstones.
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# microdroid doesn't have anr, but tombstoned requires it
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mkdir /data/anr 0775 system system
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mkdir /data/tombstones 0771 system system
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mkdir /data/vendor/tombstones 0771 root root
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start tombstoned
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# For security reasons, /data/local/tmp should always be empty.
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# Do not place files or directories in /data/local/tmp
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mkdir /data/local 0751 root root
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mkdir /data/local/tmp 0771 shell shell
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on post-fs-data && property:microdroid_manager.authfs.enabled=1
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start authfs_service
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on boot
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# Mark boot completed. This will notify microdroid_manager to run payload.
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setprop dev.bootcomplete 1
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on property:tombstone_transmit.start=1
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mkdir /data/tombstones 0771 system system
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start tombstone_transmit
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service tombstone_transmit /system/bin/tombstone_transmit.microdroid -cid 2 -port 2000 -remove_tombstones_after_transmitting
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user system
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group system
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shutdown critical
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service apexd-vm /system/bin/apexd --vm
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user root
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group system
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oneshot
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disabled
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capabilities CHOWN DAC_OVERRIDE DAC_READ_SEARCH FOWNER SYS_ADMIN
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service ueventd /system/bin/ueventd
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class core
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critical
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seclabel u:r:ueventd:s0
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capabilities CHOWN DAC_OVERRIDE DAC_READ_SEARCH FOWNER FSETID MKNOD NET_ADMIN SETGID SETUID SYS_MODULE SYS_RAWIO
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service console /system/bin/sh
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class core
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console
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disabled
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user shell
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group shell log readproc
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seclabel u:r:shell:s0
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setenv HOSTNAME console
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service init_debug_policy /system/bin/init_debug_policy
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oneshot
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disabled
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stdio_to_kmsg
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