tree 44590befa6ee02ce366046baa4b890cf43f9b57b
parent 2b40105c4354857a0d7066fb2dfe552685fd1b0d
author Tao Bao <tbao@google.com> 1562634442 -0700
committer Tao Bao <tbao@google.com> 1562823171 -0700

minadbd sends heartbeat to rescue service for getprop command.

We start minadbd and rescue services in two processes. In particular,
minadbd handles the requests from host, then communicates with rescue
service to do install/wipe works. When resuce service doesn't see any
request in a pre-defined timeout (currently 300s), rescue service will
exit to avoid endless waiting.

This CL changes minadbd to additionally send a no-op command to rescue
service as a heartbeat signal, so that host side can finish
time-consuming operations (e.g. downloading over network) while keeping
rescue service alive.

Bug: 136457446
Test: Enter resuce mode on blueline. Send `adb rescue getprop
      ro.build.fingerprint` and check that rescue service doesn't exit.
Test: Stop sending the getprop command. Check that rescue service exits
      after 300s.
Change-Id: Ib9d5ed710cfa94ecfe6cf393a71a0b67b2539531
Merged-In: Ib9d5ed710cfa94ecfe6cf393a71a0b67b2539531
(cherry picked from commit 2223e6a9f8bf24b023e8ae3103b50c37def3147e)