Node exec doesn't have permission to execute script

Question

Up until recently, it has worked fine, but when I tried to use it today, it did not work properly. It returns the following error:

Error: Command failed: /bin/sh -c /home/pi/RPi-Computer-Power/RPi-Server/routes/../scripts/hash.js 12345678 /bin/sh: 1: /home/pi/RPi-Computer-Power/RPi-Server/routes/../scripts/hash.js: Permission denied

I am extremely confused because when I try to run the script from the command line, it works perfectly; /home/pi/RPi-Computer-Power/RPi-Server/routes/../scripts/hash.js 12345 executes flawlessly.

This is the code where I try to execute the script. (index.js)

exec(__dirname+"/../scripts/"+req.params.script+" "+req.body.params, function(err, stdout, stderr) {
        console.log("err: ",err,"stdout: ",stdout,"stderr: ",stderr);
        if(err){
          res.send("<a href='/'>< Back</a> <b>Program Error:</b> "+err.toString());
          return;
        }
        //res.send("<a href='/'>< Back</a> <b>Program Output:</b> <div style='white-space:pre-line>'"+stdout+stderr+"</div>");
        res.render("programOutput", {output: stdout});
      });

If anyone has any help, thank you in advance. Neil

How are you running node.js? What permissions does it have?

jfriend00
– jfriend00

2017-05-06 00:51:17 +00:00
Commented May 6, 2017 at 0:51 — jfriend00
– jfriend00, Commented May 6, 2017 at 0:51

Jamil Said · Accepted Answer · 2017-05-06 00:40:06Z

7

Two things come to mind:

1) Make sure that the script you are trying to execute is executable ex: chmod +x /folder/script

2) The default terminal shell on many Linux distributions is bash. The error you displayed includes using /bin/sh -c, which would default in many Linux distributions to dash (yes, a different default shell for the terminal and for running scripts without the terminal). Thus, since it seems to work in bash, try to evoke the script with bash -c /folder/script.

answered May 6, 2017 at 0:40

Jamil Said

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1 Comment

ifconfig Over a year ago

Yes, thank you, the chmod +x * in the scripts directory method worked for me. I thought I tried to chmod 755 *, but I guess that wasn't what I needed to do. Thanks!

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