bsd man page for sleep

SLEEP(3F)																 SLEEP(3F)

NAME
       sleep - suspend execution for an interval

SYNOPSIS
       subroutine sleep (itime)

DESCRIPTION
       Sleep causes the calling process to be suspended for itime seconds.  The actual time can be up to 1 second less than itime due to granular-
       ity in system timekeeping.

FILES
       /usr/lib/libU77.a

SEE ALSO
       sleep(3)

4.2 Berkeley Distribution					   May 15, 1985 							 SLEEP(3F)