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You are here: manpages





SLEEP

Section: Linux Programmer's Manual (3)
Updated: 2010-02-03
Index Return to Main Contents
 

NAME

sleep - sleep for the specified number of seconds  

SYNOPSIS

#include <unistd.h>

unsigned int sleep(unsigned int seconds);
 

DESCRIPTION

sleep() makes the calling thread sleep until seconds seconds have elapsed or a signal arrives which is not ignored.  

RETURN VALUE

Zero if the requested time has elapsed, or the number of seconds left to sleep, if the call was interrupted by a signal handler.  

CONFORMING TO

POSIX.1-2001.  

BUGS

sleep() may be implemented using SIGALRM; mixing calls to alarm(2) and sleep() is a bad idea.

Using longjmp(3) from a signal handler or modifying the handling of SIGALRM while sleeping will cause undefined results.  

SEE ALSO

alarm(2), nanosleep(2), signal(2), signal(7)  

COLOPHON

This page is part of release 3.81 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
CONFORMING TO
BUGS
SEE ALSO
COLOPHON


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