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Man page of SLEEP
SLEEP
Section: Linux Programmer's Manual (3)
Updated: 2016-03-15
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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.
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.
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
sleep(1),
alarm(2),
nanosleep(2),
signal(2),
signal(7)
COLOPHON
This page is part of release 4.09 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- CONFORMING TO
-
- BUGS
-
- SEE ALSO
-
- COLOPHON
-
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