Sleep function in c, unix

Question

What do I need to import in order to use the sleep function in unix? I know this is windows.h for windows, but what about unix?

Answer 1

It should be in unistd.h.

Please note that this only gives you the accuracy of integral seconds.

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

Answer 2

#include <unistd.h> 

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

Answer 3

 #include <unistd.h> 

Man pages http://cis.kutztown.edu/~frye/cgi-bin/unixManPages.cgi?sleep+3C