#include int main() { timespec ts; // clock_gettime(CLOCK_MONOTONIC, &ts); // Works on FreeBSD clock_gettime(CLOCK_REALTIME, &ts); // Works on Linux }

Code Explanation:

Including Necessary Library

The #include <time.h> directive is used to include the necessary library for time-related functions.

Defining the Main Function

The int main() function serves as the entry point for the program.

Declaring a timespec Variable

The line timespec ts; declares a variable ts of type timespec.

Obtaining the Monotonic Time (FreeBSD)

The line // clock_gettime(CLOCK_MONOTONIC, &ts); is a commented-out call to the clock_gettime function with CLOCK_MONOTONIC as the clock ID. This particular call works on FreeBSD.

Obtaining the Realtime Clock Time (Linux)

The line clock_gettime(CLOCK_REALTIME, &ts); calls the clock_gettime function with CLOCK_REALTIME as the clock ID. This call works on Linux.