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Full Discussion: How the Sleep function will work?
Top Forums Shell Programming and Scripting How the Sleep function will work? Post 302564258 by mandlysreedhar on Thursday 13th of October 2011 08:21:26 AM
Old 10-13-2011
Network How the Sleep function will work?
Hi All,

I am new to Unix , there i am facing one problem with sleep command. that is ..
in while loop i have defined sleep function ..

my condition is like this

Code:
while [ 1 -le 0 ]  #i knew this is infinite loop
do

sleep 200
echo "hello "

done

.

this condition will never become .. true .. so.. my Question is how long this sleep condition keep on checking every 2 mints.. like .. a day or two days.
or the sleep function keep on executing ?

please any one can suggest me

Thanks
Sree
Last edited by pludi; 10-13-2011 at 09:31 AM..
 

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LEARN ABOUT SUSE

sleep

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 3.25 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)
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