72 lines
2.1 KiB
Bash
72 lines
2.1 KiB
Bash
#!/bin/bash
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# 查找空闲端口
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find_free_port() {
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local start="${1:-10001}"
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local max="${2:-65535}"
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# 收集当前监听端口（TCP + UDP）
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local used_ports raw
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if command -v ss >/dev/null 2>&1; then
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raw=$(ss -lntu 2>/dev/null || true)
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used_ports=$(printf "%s\n" "$raw" | awk '{print $5}' | sed -n '2,$p' | sed -E 's/.*[:]//g' | sed '/^$/d')
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elif command -v netstat >/dev/null 2>&1; then
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raw=$(netstat -lntu 2>/dev/null || true)
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used_ports=$(printf "%s\n" "$raw" | awk '{print $4}' | sed -n '2,$p' | sed -E 's/.*[:]//g' | sed '/^$/d')
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elif command -v lsof >/dev/null 2>&1; then
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raw=$(lsof -i -P -n 2>/dev/null || true)
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used_ports=$(printf "%s\n" "$raw" | awk '/LISTEN/ {print $9}' | sed -E 's/.*[:]//g' | sed '/^$/d')
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else
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echo "Error: neither ss, netstat nor lsof is available to check listening ports." >&2
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return 2
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fi
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# 用关联数组记录已占用端口（需要 bash 4+）
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declare -A used_map
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local p
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for p in $used_ports; do
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# 过滤掉非数字
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if [[ $p =~ ^[0-9]+$ ]]; then
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used_map["$p"]=1
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fi
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done
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# 从 start 到 max 逐个检查
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for ((port = start; port <= max; port++)); do
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if [[ -z "${used_map[$port]}" ]]; then
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echo "$port"
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return 0
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fi
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done
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# 没找到可用端口
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echo "Error: No available port found in range $start-$max" >&2
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return 1
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}
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# 修改端口的函数
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change_port() {
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local script_dir=$(cd "$(dirname "$0")"; pwd)
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local config_dir=$(readlink -f "$script_dir/../")
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source "$script_dir/utils/jq_util.sh"
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local old_port=$(jq -r '.listen' "$config_dir/config.json" | awk -F : '{print $2}')
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local port
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read -p "请输入新的端口[当前端口: $old_port]: " port
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# 如果输入端口为空, 查找空闲端口
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if [[ -z "$port" ]]; then
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port=$(find_free_port)
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if [[ -z "$port" ]]; then
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echo "未能找到可用端口！" >&2
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return 1
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fi
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echo "未输入端口，自动分配可用端口: $port"
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fi
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modify_json_file "$config_dir/config.json" ".listen" ":$port"
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echo "端口修改成功！新端口为: $port"
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}
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change_port |