Subject:
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linux->solaris porting info
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Mon, 29 Nov 1999 14:45:53 GMT
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Viewed:
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1042 times
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To whom it may concern: (I think this means Carsten :) This was the
response I got from our resident Solaris/Linux god, conveniently named
Karsten. He believes this one-line fix should have similar behavior. I
can't test it (haven't been able to get other portions of the code to
compile) so I forward it to you in hopes that it is helpful. Let me know
what you find- I may be able to finagle more information out of him if
you need it, or possibly read some man pages myself :)
-Luis (slowly, slowly learning about i/o issues)
---------- Forwarded message ----------
Date: Mon, 22 Nov 1999 16:27:06 -0500 (EST)
From: Karsten Paige Huneycutt <kph@duke.edu>
To: Luis Villa <liv@duke.edu>
Subject: Re: DULUG: linux->solaris porting question
On Fri, 19 Nov 1999, Luis Villa wrote:
> signal(SIGIO,sigio_handler);
> fcntl(rcxFD(),F_SETFL,O_ASYNC);
>
> are called to attach a handler sigio_handler to the SIGIO which will be
> sent when it is possible to do i/o on rcxFD(). AFAICT, under normal
> operation, this won't occur.
To get this behavior on STREAMs objects in Solaris, call, instead of the
fcntl:
ioctl(rcxFD(), I_SETSIG, ARGS),
where you've read the manpage for streamio (section 7I) and have chosen
the most appropriate args. If you want this for non-STREAMs objects,
you're on your own.
FYI, sockets in Solaris are implemented using STREAMs, as are terminals--
I'm not sure what else this behavior would be useful for.
> The man page for fcntl indicates that POSIX has asynchronous IO and the
> aio_sigevent to achieve the same goal as the O_ASYNC flag and the related
> thrown SIGIO. Which brings me to my question- is there any
> straightforward way to replace the fcntl/signal handler pair here with
> something else that will send a similar signal in a POSIX system?
I know nothign about making this POSIX-compliant... :)
KH
Karsten Huneycutt I'll make it all worthwhile, I'll make your
kph@duke.edu heart smile! Strange love, strange highs
http://www.duke.edu/~kph and strange lows... -- DM, "Strangelove"
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