C++ Code Playground - system() Return Value

Question

I tried using system() in <cstdlib>/<stdlib.h> to interact with the shell which runs on SL server-side. No matter what I do, system() returns -1. It looks like SL blocked system() calls on purpose (which rationale I definitely understand). I was just wondering if anybody tried this in the past, and if my assumptions on access restrictions are correct. The following code displays 0 on my local machine, but -1 on SL.

#include <iostream>
#include <cstdlib>

int main() {
std::cout << system("");
}

Answer 1

"If we pass null pointer in place of string for command parameter, system returns nonzero if command processor exists (or system can run). Otherwise returns 0"

https://code.sololearn.com/cNjLK8m9flal/?ref=app

https://en.m.wikibooks.org/wiki/C%2B%2B_Programming/Code/Standard_C_Library/Functions/system

Answer 2

Thanks, Jay. Tsk, I really hope it was just me doing something wrong. Much would be achievable if we are provided with even limited access to the file system (like in Termux).

Answer 3

Sandy Taylor
Please avoid writing irrelevant response in someone's thread answer section. If you have a question then you can make your own thread where you can speak your doubt. Mind still to try to stay on topic and follow forum general guides.

See the FAQ page for common answers to questions - and tips for authoring a thread in the forum.

Hoping you a great SoloLearn journey 👍

https://www.sololearn.com/faq
https://www.sololearn.com/Discuss/333866/?ref=app

Answer 4

I do not know how to code I want to learn where do I start any help?