read() & close()

["Filipau, Ihar" <ifilipau@sussdd.de>]

Hello All!

    [ CC me please - I'm not subscribed ]

    I have a question which goes to 2.2 kernels times.
    But I expect newer kernels do the same.

    I have/had a simple issue with multi-threaded programs:

    one thread is doing blocking read(fd) or poll({fd}) on 
    file/socket.

    another thread is doing close(fd).

    I expected first thread will unblock with some kind 
    of error - but nope! It is blocked!

    Is it expected behaviour?

    I was implementing couple of char device 
    drivers and I was putting wake_up_interruptible() 
    into close(). Nice feature - but not more.

    Does it really matters?
    What standards do say about this? - I have none of 
    them :-(   

P. S. Subject looks correct from point of view of bash:
"read() &" and then "close()" does nothing - %1 can only 
be killed ;)

--- Regards&Wishes! With respect
---       Ihar "Philips" Filipau and Phil for friends

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MCS/Mathematician - System Programmer
Ihar Filipau 
Software entwickler @ SUSS MicroTec Test Systems GmbH, 
Suss-Strasse 1, D-01561 Sacka (bei Dresden)
e-mail: ifilipau@sussdd.de  tel: +49-(0)-352-4073-327
fax: +49-(0)-352-4073-700   web: http://www.suss.com/