From mboxrd@z Thu Jan  1 00:00:00 1970
From: dhylands@gmail.com (Dave Hylands)
Date: Tue, 22 Nov 2011 23:21:16 -0800
Subject: plz help with the serial port pgm....
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Hi shibin

On Tue, Nov 22, 2011 at 9:48 PM, shibin k reeny <shibinkreeny@gmail.com> wrote:
> rs232 read pgm is not working when i connect in loopback but write is
> wroking plz help...

Rather than trying to debug your program, I'll point you at this document:
http://tldp.org/HOWTO/Serial-Programming-HOWTO/

and point at some sample code which I wrote a while ago, which I know works:
http://svn.hylands.org/host/sertest/sertest.c

-- 
Dave Hylands
Shuswap, BC, Canada
http://www.davehylands.com