错误：生成sh ENOENT Node.js

Question

I am trying to trigger PIFM on my raspberry Pi by tweets from a specific twitter account using node.js. However when I run twitpifm.js on the command line:

node twitpifm.js

I get the following error:

events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: spawn sh ENOENT
    at exports._errnoException (util.js:874:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:178:32)
    at onErrorNT (internal/child_process.js:344:16)
    at doNTCallback2 (node.js:439:9)
    at process._tickCallback (node.js:353:17)
    at Function.Module.runMain (module.js:469:11)
    at startup (node.js:134:18)
    at node.js:961:3

I am using this version of PIFM on my PI2

https://github.com/asmello/fm_transmitter

I have written a script (test.sh) that will start PIFm from command line without parameters

 #!/bin/bash
    /home/pi/PIFm/fm_transmitter/bin/Release/fm_transmitter music.wav 103.50

I am aware that I need to need to use a child_process within my node.js to activate this shell script but am having trouble with it;

First I invoke child process with:

var spawn = require('child_process').spawn // child process.spawn 

I then try to trigger the shell with the following:

function thisTweet(){

    spawn('sh', ['test.sh'], {  // shell script I want to run.
    cwd:' /home/pi/Desktop/Twitter', // current working directory where my twitpifm.js file is 
    env: Object.assign({}, process.env, { PATH: process.env.PATH + '/home/pi/PIFm/fm_transmitter' }) //this sets a path to where test.sh is
    })

Any suggestions would be great!

Answer 1

Ok..I got a solution that seems to be working using . execfile from here:

https://nodejs.org/api/child_process.html#child_process_child_process_execfile_file_args_options_callback

This code worked:

const execFile = require('child_process').execFile;
const child = execFile('sh', ['/home/pi/Desktop/twitter/test'], (error, stdout, stderr) => {
  if (error) {
    throw error;
  }
  console.log(stdout);
});
}  

This lets me execute a shell script from node.js