A question about read() system call!!

[Akira Takiguchi]

In article <690002 at hpsciz.sc.hp.com> dougy at hpsciz.sc.hp.com (Doug Yip) writes:
[noblocking read(2)]
>If the file is already open, you can do a fcntl(fd,F_SETFL,O_NDELAY).

     ok.

>If the file is not open yet, you can specify the O_NDELAY option when you
>open the file.

     This has nothing to do with the problem.  It makes open(2) non-blocking
but not read(2).
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