Re: Why side-effects on open(2) are evil. (was Re: [RFD w/info-PATCH] device arguments from lookup)

From: Pavel Machek (pavel@suse.cz)
Date: Sun May 20 2001 - 15:23:20 EST

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Hi!

> A lot of stuff relies on the fact that close(open(foo, O_RDONLY)) is a
> no-op. Breaking that assumption is a Bad Thing(tm).

Then we have a problem. Just opening /dev/ttyS0 currently *has* side
effects (it is visible on modem lines from serial port; it can block
you forever).

If this assumption is somewhere, we should fix that place... Or fix
serial ports.
Pavel

-- 
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org
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