sleep(1) [bsd man page]

SLEEP(1)						      General Commands Manual							  SLEEP(1)

NAME

       sleep - suspend execution for an interval

SYNOPSIS

       sleep time

DESCRIPTION

       Sleep suspends execution for time seconds.  It is used to execute a command after a certain amount of time as in:

	    (sleep 105; command)&

       or to execute a command every so often, as in:

	    while true
	    do
		 command
		 sleep 37
	    done

SEE ALSO

       setitimer(2), alarm(3C), sleep(3)

BUGS

       Time must be less than 2,147,483,647 seconds.

7th Edition							  April 29, 1985							  SLEEP(1)

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

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 3.27 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2010-02-03								  SLEEP(3)