Question

我正在使用几个awk脚本来读/写我的网络接口文件。为了将这些脚本集成到我的Node.js项目中，我正在使用child_process.exec函数执行它们。

问题是read脚本的行为似乎有所不同，具体取决于它是否使用exec运行。

以下是我在Node中运行脚本的代码：

import cp from "child_process";
import {normalize, join} from "path";

const local = (path) => normalize(join(__dirname, path));
const readScript = local("/network-scripts/read-interface.awk");
const writeScript = local("/network-scripts/write-interface.awk");

function exec(cmd, options) {
  return new Promise((resolve, reject) => {
    cp.exec(cmd, options, (error, stdout, stderr) => {
      if(error) reject(error);
      else resolve({stdout, stderr});
    });
  });
}

function read(interfacesPath, interfaceName) {
  return exec(`awk -f ${readScript} ${normalize(interfacesPath)} device=${interfaceName}`).then((data) => {
    console.log(data);
    return data;
  });
}

这是我正在测试的interfaces文件：

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0 eth1 eth2 eth3

iface eth0 inet static
    address 10.0.11.100
    netmask 255.255.255.0
    gateway 10.0.11.1

iface eth1 inet manual
    up ifconfig $IFACE 0.0.0.0 up
    down ifconfig $IFACE down

iface eth2 inet static
    address 192.168.1.2
    netmask 255.255.255.0
    gateway 192.168.1.254

iface eth3 inet dhcp

这是我的测试：

import intf from "../server/interfaces";
const testInterfaces = `${__dirname}/../test-interfaces`;

describe("interfaces", () => {
  it("should be able to read a dynamic interface", (done) => {
    intf.read(testInterfaces, "eth3").then(() => done(), done);
  });
});

当我运行此测试时，我将此错误视为输出：

Failed: { [Error: Command failed: /bin/sh -c awk -f /Users/james1/Projects/pump-dashboard/server/network-scripts/read-interface.awk /Users/james1/Projects/pump-dashboard/test-interfaces device=eth3
]
  killed: false,
  code: 1,
  signal: null,
  cmd: '/bin/sh -c awk -f /Users/james1/Projects/pump-dashboard/server/network-scripts/read-interface.awk /Users/james1/Projects/pump-dashboard/test-interfaces device=eth3' }

但是，如果我直接从该错误中复制命令：

awk -f /Users/james1/Projects/pump-dashboard/server/network-scripts/read-interface.awk /Users/james1/Projects/pump-dashboard/test-interfaces device=eth3

并在我的终端中运行它，它按预期输出“dhcp”。

此外，如果我将输入设备的read函数作为静态接口“eth0”运行，则脚本按预期工作（即使使用exec）。

为什么在使用exec vs在终端中运行命令（使用zsh）时会收到不同的结果？我该怎么做才能解决这个问题？

使用exec运行时awk脚本失败，但在手动运行时则不会

0 个答案: