Manual Reference Pages - SLEEP (3)
- suspend process execution for an interval measured in seconds
sleep unsigned int seconds
function suspends execution of the calling process until either
seconds have elapsed or a signal is delivered to the process and its
action is to invoke a signal-catching function or to terminate the
System activity may lengthen the sleep by an indeterminate amount.
This function is implemented using
by pausing for
seconds or until a signal occurs.
Consequently, in this implementation,
sleeping has no effect on the state of process timers,
and there is no special handling for SIGALRM.
function returns because the requested time has elapsed, the value
returned will be zero.
function returns due to the delivery of a signal, the value returned
will be the unslept amount (the requested time minus the time actually
slept) in seconds.
function conforms to
function appeared in
AT&T v7 .
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