Invoke subprocess and capture output

invoke_subprocess.cpp

#include <cstdio>
#include <iostream>
#include <memory>
#include <stdexcept>
#include <array>

const std::string InvokeSubprocess(const std::string strTargetSubprocess) {
    std::array<char, 128> arBuffer;
    std::string strResult;

    /**
     * Windows does not support popen and pclose, 
     * so they need to be changed to _popen and
     * _pclose.
     */
    #ifdef _WIN32
    std::unique_ptr<FILE, decltype(&_pclose)> pipe(_popen(strTargetSubprocess.c_str(), "r"), _pclose);
    #else
    std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(strTargetSubprocess.c_str(), "r"), pclose);
    #endif

    if (!pipe) {
        throw std::runtime_error("Could not open pipe to subprocess");
    }
    while(fgets(arBuffer.data(), arBuffer.size(), pipe.get()) != nullptr) {
        strResult += arBuffer.data();
    }
    return strResult;
}

/* Example */
/* InvokeSubprocess("python -c \"print(True)\"") */
/* InvokeSubprocess("ls -l /dev/null") */

invoke_subprocess.py

import subprocess
from typing import Tuple

def invoke_subprocess(command: str) -> Tuple[str, str]:
    proc = subprocess.run(command, capture_output=True, shell=True)
    return proc.stdout, proc.stderr

# Example
# print(invoke_subprocess('python -c "print(True)"'))
# print(invoke_subprocess('ls -l /dev/null'))