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#!/usr/bin/env bash
set -euo pipefail
SOCKET_DIR="/home/adam/coinos-server/data/sockets"
SOCKET_MAIN="$SOCKET_DIR/lightning-rpc"
SOCKET_LISTEN="$SOCKET_DIR/lightning-rpc-listen"
REMOTE_SOCKET="/home/adam/coinos-server/data/lightning/bitcoin/lightning-rpc"
REMOTE_HOST="desk"
log() {
echo "$(date '+%Y-%m-%d %H:%M:%S') [ln-socket-monitor] $*"
}
# Find SSH pids that are forwarding our sockets
pid_main=$(pgrep -f "ssh.*-L ${SOCKET_MAIN}:${REMOTE_SOCKET} ${REMOTE_HOST}" 2>/dev/null || true)
pid_listen=$(pgrep -f "ssh.*-L ${SOCKET_LISTEN}:${REMOTE_SOCKET} ${REMOTE_HOST}" 2>/dev/null || true)
# Check if both processes are alive and both sockets exist
if [[ -n "$pid_main" && -n "$pid_listen" && -S "$SOCKET_MAIN" && -S "$SOCKET_LISTEN" ]]; then
exit 0
fi
# Something is wrong - log what we found
if [[ -z "$pid_main" ]]; then
log "main SSH forward is dead"
elif [[ ! -S "$SOCKET_MAIN" ]]; then
log "main socket file missing"
fi
if [[ -z "$pid_listen" ]]; then
log "listen SSH forward is dead"
elif [[ ! -S "$SOCKET_LISTEN" ]]; then
log "listen socket file missing"
fi
# Kill any remaining SSH forwards for our sockets
for pid in $pid_main $pid_listen; do
if [[ -n "$pid" ]]; then
log "killing stale SSH forward (pid $pid)"
kill "$pid" 2>/dev/null || true
fi
done
# Brief wait for processes to exit
sleep 1
# Clean up socket files
for sock in "$SOCKET_MAIN" "$SOCKET_LISTEN"; do
if [[ -e "$sock" ]]; then
log "removing stale socket $sock"
rm -f "$sock"
fi
done
# Ensure socket directory exists
mkdir -p "$SOCKET_DIR"
# Re-establish both SSH forwards
log "starting main SSH forward"
ssh -nNT -o ExitOnForwardFailure=yes \
-L "${SOCKET_MAIN}:${REMOTE_SOCKET}" "$REMOTE_HOST" &
log "starting listen SSH forward"
ssh -nNT -o ExitOnForwardFailure=yes \
-L "${SOCKET_LISTEN}:${REMOTE_SOCKET}" "$REMOTE_HOST" &
# Wait briefly for sockets to appear
for i in 1 2 3 4 5; do
if [[ -S "$SOCKET_MAIN" && -S "$SOCKET_LISTEN" ]]; then
break
fi
sleep 1
done
# Set permissions on sockets
if [[ -S "$SOCKET_MAIN" ]]; then
chmod 777 "$SOCKET_MAIN"
log "set permissions on $SOCKET_MAIN"
else
log "WARNING: $SOCKET_MAIN did not appear after 5s"
fi
if [[ -S "$SOCKET_LISTEN" ]]; then
chmod 777 "$SOCKET_LISTEN"
log "set permissions on $SOCKET_LISTEN"
else
log "WARNING: $SOCKET_LISTEN did not appear after 5s"
fi
log "SSH forwards re-established"
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