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.TH SLEEP 3C "Feb 5, 2008"
.SH NAME
sleep \- suspend execution for an interval of time
.SH SYNOPSIS
.LP
.nf
#include <unistd.h>

\fBunsigned int\fR \fBsleep\fR(\fBunsigned int\fR \fIseconds\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The caller is suspended from execution for the number of \fIseconds\fR
specified by the argument. The actual suspension time may be less than that
requested because any caught signal will terminate the \fBsleep()\fR following
execution of that signal's catching routine. The suspension time may be longer
than requested by an arbitrary amount because of the scheduling of other
activity in the system. The value returned by \fBsleep()\fR will be the
``unslept'' amount (the requested time minus the time actually slept) if the
caller incurred premature arousal because of a caught signal.
.sp
.LP
The use of the \fBsleep()\fR function has no effect on the action or blockage
of any signal. In a multithreaded process, only the invoking thread is
suspended from execution.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Committed
_
MT-Level	Async-Signal-Safe
_
Standard	See \fBstandards\fR(7).
.TE

.SH SEE ALSO
.sp
.LP
.BR nanosleep (3C),
.BR attributes (7),
.BR standards (7)