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30 .\" @(#)sleep.3 8.1 (Berkeley) 6/4/93
37 .Nd suspend process execution for interval of seconds
43 .Fn sleep "unsigned int seconds"
47 function suspends execution of the calling process until either the
48 number of seconds specified by
50 have elapsed or a signal is delivered to the calling process and its
51 action is to invoke a signal-catching function or to terminate the
53 The suspension time may be longer than requested due to the
54 scheduling of other activity by the system.
58 function returns because the requested time has elapsed, the value
59 returned will be zero.
62 function returns due to the delivery of a signal, the value returned
63 will be the unslept amount (the request time minus the time actually