1SLEEP(3)                   Linux Programmer's Manual                  SLEEP(3)
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NAME

6       sleep - Sleep for the specified number of seconds
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SYNOPSIS

9       #include <unistd.h>
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11       unsigned int sleep(unsigned int seconds);
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DESCRIPTION

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

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

22       POSIX.1-2001.
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BUGS

25       sleep()  may be implemented using SIGALRM; mixing calls to alarm(2) and
26       sleep() is a bad idea.
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28       Using longjmp(3) from a signal handler or  modifying  the  handling  of
29       SIGALRM while sleeping will cause undefined results.
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SEE ALSO

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

35       This  page  is  part of release 3.25 of the Linux man-pages project.  A
36       description of the project, and information about reporting  bugs,  can
37       be found at http://www.kernel.org/doc/man-pages/.
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41GNU                               2010-02-03                          SLEEP(3)