SLEEP(3)            Linux Programmer's Manual            SLEEP(3)

NAME
       sleep - Sleep for the specified number of seconds

SYNOPSIS
       #include <unistd.h>

       unsigned int sleep(unsigned int seconds);

DESCRIPTION
       sleep() makes the current process sleep until seconds sec-
       onds 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
       handling of SIGALRM while sleeping  will  cause  undefined
       results.

SEE ALSO
       signal(2), alarm(2)

GNU                       April 7, 1993                         1