A question about read() system call!!

[Shane Bouslough]

>From article <1361 at anprda.atson.asahi-np.co.jp>
	akira at atson.asahi-np.co.jp (Akira Takiguchi) speaks too soon:
> 
>>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).

BZZZZZZZZZZZ! <- game show buzzer

And the Manual looketh upon O_NDELAY and spake:

OPEN(2)
	O_NDELAY This flag may affect subsequent reads and writes. See
	read(2) and write(2).

READ(2)
	When attempting to read from an empty pipe (or FIFO):
		If O_NDELAY is set, the read will return a 0.
		If O_NDELAY is clear, the read will block until data
		is written to the file or the file is no longer
		open for writing.

And the Manual saw that O_NDELAY was good.

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