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SLEEP
Section: User Commands (1)Updated: January 2018
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NAME
sleep - delay for a specified amount of timeSYNOPSIS
sleep ,NUMBER/[,SUFFIX/]...sleep ,OPTION/
DESCRIPTION
Pause for NUMBER seconds. SUFFIX may be 's' for seconds (the default), 'm' for minutes, 'h' for hours or 'd' for days. Unlike most implementations that require NUMBER be an integer, here NUMBER may be an arbitrary floating point number. 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
AUTHOR
Written by Jim Meyering and Paul Eggert.REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/>Report sleep translation bugs to <http://translationproject.org/team/>
COPYRIGHT
Copyright © 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://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.
SEE ALSO
sleep(3)
Full documentation at: <http://www.gnu.org/software/coreutils/sleep>
or available locally via: info '(coreutils) sleep invocation'
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Time: 04:45:23 GMT, September 16, 2022 Content-type: text/html; charset=UTF-8
SLEEP
Section: Linux Programmer's Manual (3)Updated: 2017-09-15
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NAME
sleep - sleep for a specified number of secondsSYNOPSIS
#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 |
CONFORMING TO
POSIX.1-2001, POSIX.1-2008.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.
SEE ALSO
sleep(1), alarm(2), nanosleep(2), signal(2), signal(7)COLOPHON
This page is part of release 4.15 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/.
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Time: 04:45:53 GMT, September 16, 2022
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