From mboxrd@z Thu Jan  1 00:00:00 1970
From: daniel.baluta@gmail.com (Daniel Baluta)
Date: Mon, 9 May 2011 14:35:56 +0300
Subject: char driver error
In-Reply-To: <BANLkTi=iRcg7Ba2ZBM76W2Eg-BHj38x5eQ@mail.gmail.com>
References: <BANLkTi=iRcg7Ba2ZBM76W2Eg-BHj38x5eQ@mail.gmail.com>
Message-ID: <BANLkTi=1aZujj_Qz5eD+n-_DkxyA5JB3Zg@mail.gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
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> i create a character special file using mknod in /dev directory.
>
> i try to write data to my file by" echo -n "abcd" > /dev/memory "
>
> and when i try to read from that file i get ?the last char was written
> to that file that is "d"

Hello Aravind,

Can you post the output for:
$ strace -n "abcd" > /dev/memory
$ strace cat /dev/memory a

thanks,
Daniel.