Hi,
I have a problem. In my module I am not able to differentiate between
whether requests are coming from a block device or character device.
I am running my module on vmware and the keyboard hits are read thru
ptty. The major number of ptty and the hard disk are both 3. I am blocking
read system call in my module and I want to deal with the requests
pertaining to the disk only. So given a file descriptor I am able to get
the inode value and also the major and minor number of the device to which
the request has to go.
So in order to service only the requests of the disk i have an if
statement
if(inode && major == 3)
{
do my sys_read
}
else
{
do original sys_read
}
but every keystroke evaluates to true and does my sys_read section. I
thought that character devices do not have inode and the ptty requests
evaluate to false at if statement. But it is not happening so...
am i missing something...
please help me.
thanks,
raghu
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