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# battd
A simple battery daemon written for use with a daemontools-style supervisor.
`run` polls the status of a `check` function with an interleaved call to
`interval`. On the transition from a successful `check` exit status to an
unsuccessful `check` exit status the `failed` function is called.
## Installation
``` text
# ./install /etc/sv/battd
# ln -s /etc/sv/battd /var/service
```
Adjust the above as needed.
## Usage
Configure `conf` appropriately. This should contain three functions:
`interval`
: Called between consecutive calls to `check`.
`check`
: Called to determine the battery status.
`failed`
: Called when the battery status has transitioned from a successful to a
failing return.
An example `conf` is included and installed alongside the run script. An
included `battcheck` awk script takes two optional arguments and a path to the
uevent file of a battery to determine if the battery capacity and estimated
run-time meet the specified criteria. Multiple invocations of `battcheck` can be
used to handle more complex logic involving multiple batteries.
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