usleep - suspend execution for interval of microseconds

SYNOPSIS

       #include <unistd.h>

       void usleep(unsigned long usec);

DESCRIPTION

       The  usleep()  function  suspends execution of the calling
       process for usec microseconds.  The sleep may  be  length­
       ened  slightly by any system activity or by the time spent
       processing the call.

CONFORMING TO

       BSD 4.3

SEE ALSO

       setitimer(2), getitimer(2), sleep(3), alarm(2), select(2)