Errno is not set using c++ system api while invoking powershell script - c++

Question

I am using system api to invoke the powershell script and that script is not setting the errno to any value which is not giving me hint if the command execution is success or failure.
Below is my powersehll script which is simply setting the exit code, but this exit code is not set when I am calling this script using c++ system api.
test.ps1
#-------------------------------------------------------------------------------
function ExitWithCode {
#-------------------------------------------------------------------------------
param($exitcode)
$host.SetShouldExit($exitcode);
exit
}
ExitWithCode -exitcode 1
Execution of script using c++ program
string cmd = "";
std::getline(cin, cmd);
errno = 0;
cout <<" system " <<cmd << " ------> " << endl;
cout << system(cmd.c_str()) << " errno " << errno << endl;
Output of the c++ program
powershell -ExecutionPolicy Unrestricted -File "C:\test.ps1"
system powershell -ExecutionPolicy Unrestricted -File "C:\test.ps1" ------>
0 errno 0
system command output is 0 but the errno is alos set to 0. Any idea why the errno is not set?

Answer 1

The exit keyword in PowerShell sets the return code to 0 by default. As you are just calling exit without an argument, the return code will always be 0. Change your function to this:
#-------------------------------------------------------------------------------
function ExitWithCode {
#-------------------------------------------------------------------------------
param($exitcode)
exit $exitcode
}
ExitWithCode -exitcode 1
Or don't reinvent the wheel and just call:
exit 1