which errno should I use

Ralph Blach rcblach at raleigh.ibm.com
Wed Jan 31 03:52:51 EST 2001

I am writing a character device driver.  I want this device driver to
return an error if the user request less than say 1024 byte of data.
What errno should I use?  Is it legal to return an error if not enouth
bytes are requested?


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