Section (1) sleep
Name
sleep — delay for a specified amount of time
Synopsis
sleep
NUMBER[SUFFIX]
...
sleep
OPTION
DESCRIPTION
Pause for NUMBER seconds. SUFFIX may be _zsingle_quotesz_s_zsingle_quotesz_ for seconds (the default), _zsingle_quotesz_m_zsingle_quotesz_ for minutes, _zsingle_quotesz_h_zsingle_quotesz_ for hours or _zsingle_quotesz_d_zsingle_quotesz_ for days. NUMBER need not be an integer. Given two or more arguments, pause for the amount of time specified by the sum of their values.
−−help
-
display this help and exit
−−version
-
output version information and exit
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/sleep>
or available locally via: info _zsingle_quotesz_(coreutils) sleep invocation_zsingle_quotesz_
COPYRIGHT |
---|
Copyright © 2019 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. |
Section (3) sleep
Name
sleep — sleep for a specified number of seconds
Synopsis
#include <unistd.h>
unsigned int
sleep( |
unsigned int seconds) ; |
DESCRIPTION
sleep
() causes the calling
thread to sleep either until the number of real-time seconds
specified in seconds
have elapsed or until 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.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
Interface | Attribute | Value |
sleep () |
Thread safety | MT-Unsafe sig:SIGCHLD/linux |
NOTES
On Linux, sleep
() is
implemented via nanosleep(2). See the
nanosleep(2) man page for a
discussion of the clock used.
Portability notes
On some systems, sleep
()
may be implemented using alarm(2) and SIGALRM
(POSIX.1 permits this); 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.
COLOPHON
This page is part of release 4.16 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
https://www.kernel.org/doc/man−pages/.
Copyright (c) 1993 by Thomas Koenig (ig25rz.uni-karlsruhe.de) %%%LICENSE_START(VERBATIM) Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Since the Linux kernel and libraries are constantly changing, this manual page may be incorrect or out-of-date. The author(s) assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein. The author(s) may not have taken the same level of care in the production of this manual, which is licensed free of charge, as they might when working professionally. Formatted or processed versions of this manual, if unaccompanied by the source, must acknowledge the copyright and authors of this work. %%%LICENSE_END Modified Sat Jul 24 18:16:02 1993 by Rik Faith (faithcs.unc.edu) |