#!/usr/bin/env bash
# Probe pfv-tsys4 for what's available to drive the serial console.
# Also snapshots local ssh/scp activity so we can de-conflict with the
# other agent running in this directory.
set -u

echo "===== LOCAL ssh/scp activity (other-agent de-confliction) ====="
ps -eo pid,ppid,etime,user,args | grep -E 'ssh|scp' | grep -v grep || echo "(none)"

echo
echo "===== Ping pfv-tsys4 ====="
ping -c1 -W2 pfv-tsys4 >/dev/null 2>&1 && echo "ping OK" || echo "ping FAIL"

echo
echo "===== Probe pfv-tsys4 over ssh ====="
ssh -o BatchMode=yes -o ConnectTimeout=5 root@pfv-tsys4 'bash -s' <<'REMOTE'
echo "--- host ---"
hostname; uname -a
echo "--- tools ---"
for t in python3 python expect screen minicom picocom stty fuser lsof; do
    p=$(command -v "$t" 2>/dev/null) && echo "$t -> $p" || echo "$t -> MISSING"
done
echo "--- pyserial ---"
python3 -c "import serial; print('pyserial', serial.__version__)" 2>&1
echo "--- device node ---"
ls -l /dev/ttyUSB2 2>&1
stat -c '%n owner=%U:%G mode=%a' /dev/ttyUSB2 2>&1 || true
echo "--- who holds /dev/ttyUSB2 ---"
fuser -v /dev/ttyUSB2 2>&1 || echo "(fuser: none or n/a)"
lsof /dev/ttyUSB2 2>&1 | head -20 || true
echo "--- screen sessions on this host ---"
screen -ls 2>&1 || echo "(no screen / not installed)"
echo "--- current tty settings (only readable if not held exclusively) ---"
stty -F /dev/ttyUSB2 2>&1 || echo "(held exclusively - expected if screen is up)"
echo "--- baud hints in config/history ---"
grep -riE "ttyUSB2|115200|9600|baud" /etc/ ~/.screenrc ~/.bash_history 2>/dev/null | head -20 || true
echo "--- recent console-related processes ---"
ps -eo pid,etime,user,args | grep -E 'screen|minicom|picocom|ttyUSB' | grep -v grep || echo "(none)"
REMOTE