#!/bin/bash
set -euo pipefail
umask 0027

# BaoTa sends SIGTERM and immediately starts the replacement. go-zero drains
# existing connections asynchronously, so wait for the old listener to close.
for attempt in $(seq 1 120); do
  if ! /usr/sbin/ss -H -ltn 'sport = :18888' | /usr/bin/grep -q .; then
    exec /www/server/xingyu-im/bt/xingyu-api
  fi
  sleep 0.25
done
printf '%s\n' 'Cannot start Xingyu: local port 18888 is still occupied after 30 seconds.' >&2
exit 1