Reported from a real display: Edge closed on the desktop but still listed in
Task Manager, and the watchdog never relaunched it.
That is this watchdog's own bug. It asked only whether a --kiosk process
existed. After an Edge update the window can be gone while the process lingers,
so the check said "kiosk is up" and returned - every cycle, forever. Matching on
the command line was chosen to stop a stray renderer masking a dead kiosk; it
does not help when the orphan is the parent.
A kiosk now counts as up only when a --kiosk process still owns a visible
window (MainWindowHandle). Windowless ones are killed BEFORE relaunching:
leaving them would satisfy the next cycle's check again, and a second browser
would fight the first for the display.
Also refuses to run as SYSTEM. MainWindowHandle is session-scoped, so a SYSTEM
caller reads 0 for a perfectly healthy kiosk and would kill and relaunch it on
every cycle. The task uses an interactive Users principal so this cannot
normally happen; the guard makes a mis-registered task fail loudly instead of
thrashing a display in a hallway.
Verified on Windows this time by letting the SCHEDULED TASK do the work rather
than invoking the script by hand - which is what the first version was missing:
- task fired unattended (rc=0) and launched the kiosk into session 1
- the next cycle saw the healthy kiosk and did nothing, no relaunch loop
- a windowless --kiosk process was killed and replaced
- run as SYSTEM, it refused and the healthy kiosk survived
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