ac98fe9e89
The event loop (even after it was brought into one place in _run in the previous commit) was hard to follow. The states and transitions weren't clear or documented, and the privilege escalation code was non-blocking while the rest was blocking. Now we have a state machine with four states: awaiting_prompt, awaiting_escalation, ready_to_send (initial data), and awaiting_exit. The actions in each state and the transitions between then are clearly documented. The check_incorrect_password() method no longer checks for empty strings (since they will always match), and check_become_success() uses equality rather than a substring match to avoid thinking an echoed command is an indication of successful escalation. Also adds a check_missing_password connection method to detect the error from sudo -n/doas -n. |
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