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 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  handling  of
       SIGALRM while sleeping will cause undefined results.

SEE ALSO

       signal(2), alarm(2)

GNU                               1993-04-07                          sleep(3)