Teknium 8a59f8a9ed fix(update): survive mid-update terminal disconnect (#11960) ...

hermes update no longer dies when the controlling terminal closes
(SSH drop, shell close) during pip install.  SIGHUP is set to SIG_IGN
for the duration of the update, and stdout/stderr are wrapped so writes
to a closed pipe are absorbed instead of cascading into process exit.
All update output is mirrored to ~/.hermes/logs/update.log so users can
see what happened after reconnecting.

SIGINT (Ctrl-C) and SIGTERM (systemd) are intentionally still honored —
those are deliberate cancellations, not accidents.  In gateway mode the
helper is a no-op since the update is already detached.

POSIX preserves SIG_IGN across exec(), so pip and git subprocesses
inherit hangup protection automatically — no changes to subprocess
spawning needed.

2026-04-17 21:29:24 -07:00

11 KiB

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