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SLEEP(3)                   Library Functions Manual                   SLEEP(3)



NAME
       sleep - suspend execution for interval

SYNOPSIS
       sleep(seconds)
       unsigned seconds;

DESCRIPTION
       The  current process is suspended from execution for the number of sec-
       onds specified by the argument.  The actual suspension time may  be  up
       to  1  second less than that requested, because scheduled wakeups occur
       at fixed 1-second intervals, and an arbitrary amount longer because  of
       other activity in the system.

       The  routine  is  implemented  by setting an interval timer and pausing
       until it occurs.  The  previous  state  of  this  timer  is  saved  and
       restored.   If the sleep time exceeds the time to the expiration of the
       previous timer, the process sleeps only until  the  signal  would  have
       occurred, and the signal is sent 1 second later.

SEE ALSO
       setitimer(2), sigpause(2)

BUGS
       An interface with finer resolution is needed.



4th Berkeley Distribution       19 January 1983                       SLEEP(3)