Date: Thu, 7 Aug 2003 21:39:35 +0300 From: Ruslan Ermilov <ru@freebsd.org> To: Stephen McKay <smckay@internode.on.net> Cc: freebsd-stable@freebsd.org Subject: Re: nvi dying with "Resource temporarily unavailable" Message-ID: <20030807183935.GA45191@sunbay.com> In-Reply-To: <200308071308.h77D8Ogj003736@dungeon.home> References: <200308071230.h77CUMgj003099@dungeon.home> <20030807123242.GB5904@sunbay.com> <200308071308.h77D8Ogj003736@dungeon.home>
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On Thu, Aug 07, 2003 at 11:08:24PM +1000, Stephen McKay wrote:
> On Thursday, 7th August 2003, Ruslan Ermilov wrote:
>
> >On Thu, Aug 07, 2003 at 10:30:22PM +1000, Stephen McKay wrote:
> >> Since I upgraded to FreeBSD 4.8 (from 4.5) I've noticed occasional failures
> >> of nvi. It will suddenly die as a key is pressed, emitting:
> >>
> >> Error: input: Resource temporarily unavailable
> >>
> >> and you are staring at your command prompt.
>
> >> Any ideas?
>
> >stty sane
>
> Eh? Which tty flag (out of the many affected by stty sane) do you believe
> causes my problem? Why would my pty be "insane" in the first place?
> Should nvi be defensive and handle this case?
>
Hm, I cannot reproduce it "normally" now, but I recall seeing
something like this. The problem is easily reproducible using
this small program:
: #include <fcntl.h>
:
: int
: main(void)
: {
: (void) fcntl(0, F_SETFL, O_NONBLOCK);
: return (0);
: }
Assuming that it's called ./a.out, this works like this:
: $ ./a.out ; vi
: Error: input: Resource temporarily unavailable
: sh: turning off NDELAY mode
: $
Cheers,
--
Ruslan Ermilov Sysadmin and DBA,
ru@sunbay.com Sunbay Software Ltd,
ru@FreeBSD.org FreeBSD committer
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