How to pass parameters to bash command in node exec function?

Question

I want to run bash script with params in node js child_process.exec()

In doc is String The command to run, with space-separated arguments, but

child.exec("cat path_to_file1 path_to_file2")

doesn't work. It is internally changed to

/bin/sh -c cat path_to_file1 path_to_file2

which fails. How can I run this correctly? In shell I would fix it this way

/bin/sh -c 'cat path_to_file1 path_to_file2'

(I didn't write callbacks, because I ask only about command param)

Not sure I understand your question. exec("cat file1 file2") works correctly. — vinayr
– vinayr, Commented Dec 17, 2015 at 15:06

thib3113 · Accepted Answer · 2015-12-17 15:08:24Z

3

Use the shell option of exec :

child.exec("cat path_to_file1 path_to_file2", {
 shell : '/bin/bash' 
})

see options : https://nodejs.org/api/child_process.html#child_process_child_process_exec_command_options_callback

answered Dec 17, 2015 at 15:08

thib3113

6141 gold badge8 silver badges20 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

thib3113 Over a year ago

Yes, but can be updated . So, you force the shell with the shell option .

Droide · Accepted Answer · 2015-12-17 15:11:27Z

-1

Did you tried something like this?

var exec = require('child_process').exec;
var child;
child = exec("cat '/route/to/file_a' '/route/to/file_b'", function (error, stdout, stderr) {
    console.log(stdout);
    console.log(stderr);
    if (error !== null) {
        console.log('exec error: ' + error);
    }
});

That way you can find what is wrong or get the correct output. ;)

answered Dec 17, 2015 at 15:11

Droide

94 bronze badges

Collectives™ on Stack Overflow

How to pass parameters to bash command in node exec function?

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related