allow -c config.json

entrypoint.sh

 #!/bin/bash
 
 pid=0
-down=$(echo "$1" | jq -r '.routers | .[].down')
+
+downs=()
+
+if [ "${1:-}" = "-c" ] || [ "${1:-}" = "--config" ]; then
+  config_file="$2"
+  # 从文件直接 cat 管道给 jq
+  while IFS= read -r d; do
+    downs+=("$d")
+  done < <(cat "$config_file" | jq -r '.routers[].down')
+else
+  # 直接把参数当作 JSON 字符串传给 jq，不存到变量
+  while IFS= read -r d; do
+    downs+=("$d")
+  done < <(printf '%s' "$1" | jq -r '.routers[].down')
+fi
+
 echo "$down"
 run_stop() {
   signalCode=$1
-  if [ -n "$down" ]; then
-    eval "$down"
-  fi
+  for down in "${downs[@]}"; do
+    "$down"
+  done
   if [ $pid -ne 0 ]; then
     kill "-$signalCode" "$pid"
     wait "$pid"

src/main.rs

 mod router;
 
-use crate::router::{Router, RouterReader, RouterWriter, SECRET_LENGTH};
+use crate::router::{Router, RouterReader, RouterWriter};
 use std::collections::HashMap;
 use std::env;
 use std::error::Error;
@@ -40,10 +40,28 @@ use crossbeam_utils::thread;
 use grouping_by::GroupingBy;
 use pnet::packet::ipv4::Ipv4Packet;
 use socket2::Socket;
+use std::fs;
 
 fn main() -> Result<(), Box<dyn Error>> {
     println!("Init");
-    let config: Config = serde_json::from_str(env::args().nth(1).ok_or("need param")?.as_str())?;
+    let args: Vec<String> = env::args().collect();
+    if args.len() < 2 {
+        return Err("need JSON string or -c <config.json>".into());
+    }
+
+    let config: Config;
+
+    if args[1] == "-c" || args[1] == "--config" {
+        // 从文件读
+        if args.len() < 3 {
+            return Err("missing value for -c/--config".into());
+        }
+        let data = fs::read_to_string(&args[2])?;
+        config = serde_json::from_str(&data)?;
+    } else {
+        // 当作 JSON 字符串解析
+        config = serde_json::from_str(&args[1])?;
+    }
     println!("Read config");
     let mut sockets: HashMap<u16, Arc<Socket>> = HashMap::new();
     println!("Ready");