Similar function to GetLastError in objective-C/C?

Question

I'm doing some lovely socket programming in objective-C right now and part of my code is giving me an error (in the setsockopt method call). I was wondering if anyone knows of a similar function to the GetLastError() function in C++ that I could use in objective-C to determine the problem with my code?

Answer 1

You want to look at the value of errno if the setsockopt returns a negative value.

From setsockopt manpage:

RETURN VALUE

Upon successful completion, setsockopt() returns 0. Otherwise, -1 is returned and errno is set to indicate the error.

You can see some standard errno values here.