Their callers may be able to add more context, so use an error string
to record the error.
Bug: 38038887
Test: boot bullhead
Test: Init unit tests
Change-Id: I46690d1c66e00a4b15cadc6fd0d6b50e990388c3
Start a init_tests.cpp file for end-to-end tests that parse small init script
segments and verify that they act as expected.
The first tests ensure that the execution order of event triggers
happens appropriately.
Test: Boot bullhead, run unit tests
Change-Id: Ic446c02605ab796fd41e0596ce1fd381aee80ce0