DESCRIPTION

     sleep()  makes  the  current  process  sleep  until  seconds
     seconds  have  elapsed  or  a  signal  arrives  which is not
     ignored.

RETURN VALUE

     Zero if the requested time has elapsed,  or  the  number  of
     seconds left to sleep.

CONFORMING TO

     POSIX.1

BUGS

     sleep() may be implemented using SIGALRM;  mixing  calls  to
     alarm() and sleep() is a bad idea.

     Using longjmp() from a signal handler or modifying the  han-
     dling   of  SIGALRM  while  sleeping  will  cause  undefined
     results.

SEE ALSO

     signal(2), alarm(2)