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init: document interface_* commands and ctl.* actions

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Test: n/a
Change-Id: Ided7e16a00142e7235edeef3be2eddb6bb751bfc
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Tom Cherry 2020-01-13 08:25:23 -08:00
parent 679185dc88
commit 504eb85f9d
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init/README.md
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@ -487,6 +487,25 @@ Commands
-f: force installation of the module even if the version of the running kernel
and the version of the kernel for which the module was compiled do not match.
`interface_start <name>` \
`interface_restart <name>` \
`interface_stop <name>`
> Find the service that provides the interface _name_ if it exists and run the `start`, `restart`,
or `stop` commands on it respectively. _name_ may be either a fully qualified HIDL name, in which
case it is specified as `<interface>/<instance>`, or an AIDL name, in which case it is specified as
`aidl/<interface>` for example `android.hardware.secure_element@1.1::ISecureElement/eSE1` or
`aidl/aidl_lazy_test_1`.
> Note that these commands only act on interfaces specified by the `interface` service option, not
on interfaces registered at runtime.
> Example usage of these commands: \
`interface_start android.hardware.secure_element@1.1::ISecureElement/eSE1`
will start the HIDL Service that provides the `android.hardware.secure_element@1.1` and `eSI1`
instance. \
`interface_start aidl/aidl_lazy_test_1` will start the AIDL service that
provides the `aidl_lazy_test_1` interface.
`load_system_props`
> (This action is deprecated and no-op.)
@ -700,6 +719,26 @@ Init provides state information with the following properties.
`/sys/fs/ext4/${dev.mnt.blk.<mount_point>}/` to tune the block device
characteristics in a device agnostic manner.
Init responds to properties that begin with `ctl.`. These properties take the format of
`ctl.<command>` and the _value_ of the system property is used as a parameter, for example:
`SetProperty("ctl.start", "logd")` will run the `start` command on `logd`. Note that these
properties are only settable; they will have no value when read.
`ctl.start` \
`ctl.restart` \
`ctl.stop`
> These are equivalent to using the `start`, `restart`, and `stop` commands on the service specified
by the _value_ of the property.
`ctl.interface_start` \
`ctl.interface_restart` \
`ctl.interface_stop`
> These are equivalent to using the `interface_start`, `interface_restart`, and `interface_stop`
commands on the interface specified by the _value_ of the property.
`ctl.sigstop_on` and `ctl.sigstop_off` will turn on or off the _sigstop_ feature for the service
specified by the _value_ of the property. See the _Debugging init_ section below for more details
about this feature.
Boot timing
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