I have written a simple block device driver in which i
m just displaying messages
in read & write part e.g " Device Reading .... " & "
Device Writing .....".
I have succesfully loaded that module in memory using
"insmod" .
& then use " mknod " command ...as :
mknod block_dev b 100 0
where , block_dev : name of device
b : as i m using block device driver
100 : major number
0 : minor number
Even this is also working without error, now after
this command device "block_dev" is created (i have
checked it wit ls command ).
But , now while using "cat" & "echo" i am getting
error as :
[root@localhost root]# cat block_dev
cat: block_dev : No such device or address
[root@localhost root]# echo "hello" > block_dev
bash: block_dev : No such device or address
Is it ok to use 'b' in mknod command while working
with block device driver,
as i hav used (shown above).
Im attaching C-code also,so plz help me....if you have
another simple code for block device driver please
send me : [email protected]
Please tell me what is going wrong in this code.....
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