#!/bin/bash
# =====================================================================
# Runs from ExecStopPost=, so it happens however qemu died - clean exit,
# SIGTERM, SIGKILL, OOM, or a crash. That is the whole reason it exists
# as a unit hook rather than as code in vmd: the archived sub-agent stack
# recorded a cancellation and killed nothing, and the run carried on.
#
# It runs as owuivm, which owns the overlay and the session directory's
# contents, so it needs no privilege at all to undo its own mess. vmd
# reaps again when it starts; neither is trusted to be the one that ran.
#
# Deliberately never fails: a teardown that exits non-zero puts the unit
# into `failed` and the next `systemctl start` needs a reset-failed first,
# which turns a transient into a wedge.
# =====================================================================
set -u

SESSION="${OWUIVM_SESSION:-}"
[[ "$SESSION" =~ ^[0-9a-f]{32}$ ]] || exit 0

RUN="/run/owuivm/$SESSION"

# The overlay is disposable by definition - every session starts from the
# frozen base - so it goes unconditionally rather than being kept "just
# in case". Anything worth keeping was written to the project share.
DISK="${OWUIVM_DISK:-}"
case "$DISK" in
  @POOL_ROOT@/vmrun/*.qcow2) rm -f -- "$DISK" 2>/dev/null ;;
esac

rm -f -- "$RUN"/qmp.sock "$RUN"/ga.sock "$RUN"/broker.sock \
         "$RUN"/vnc.sock "$RUN"/OVMF_VARS.fd 2>/dev/null

# Tells vmd the machine is gone without it having to race systemd's own
# state, and gives the orphan reaper something to find if vmd was not
# running at the time.
: > "$RUN/STOPPED" 2>/dev/null

exit 0