The Cardputer Zero's launcher ends any app whose Esc is held: SIGTERM to
its process group at three seconds, SIGKILL three seconds after that
(cp0_esc_exit_policy.hpp in CardputerZero/launcher; M5's packaging guide
still describes an older Home-for-five-seconds rule). Its own hint never
reaches the panel while an app owns it, and MeshTerm took 3.4 s to exit,
so a held Esc ended in SIGKILL.
Now a tap of Esc is typed on its release, and a hold of one second
floats a "Hold Esc to quit" box whose bar fills over the two seconds
left. While it is up the app holds the device's transmit lock: nothing
new goes on the air, and a scoped channel send under way closes its
window first. Letting go gives the lock back and types nothing. Held to
the end, MeshTerm leaves the way Quit does, and the launcher's SIGTERM
joins that exit instead of interrupting it wherever the main thread
happened to be.
The exit itself fits: openhop-core's cleanup joined the radio's IRQ
thread, parked in an uninterruptible 30 s poll, for its full 2 s
timeout. The node drops that daemon thread from the books first. On the
device, under the real launcher, the process group now drains 1.3 s
after the SIGTERM, with no SIGKILL.
The emulator's window does the same on a held Esc, debounced for an X
server's release-press repeats.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Jean-Pierre MartineauandClaude Opus 5.5
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