sleep function in c, unix

Question

What do i need to import to use the sleep function in unix? i know it's windows.h for windows, but what about unix?

Answer 1

It should be in unistd.h.

Please note that this gives you only a precision of integral seconds.

The most portable way for sub-second precision should be (ab-)using select().

Answer 2

#include <unistd.h>

• http://pubs.opengroup.org/onlinepubs/009695399/functions/sleep.html