Date: Tue, 11 Mar 2003 02:24:23 +0100 From: Simon 'portlint' Schubert <corecode@corecode.ath.cx> To: Larry Rosenman <ler@lerctr.org> Cc: Poul-Henning Kamp <phk@phk.freebsd.dk>, Conrad Sabatier <conrads@cox.net>, freebsd-current@FreeBSD.ORG, freebsd-ports@FreeBSD.ORG Subject: Re: bash2 or devfs problem? Message-ID: <20030311022423.53b77f6d.corecode@corecode.ath.cx> In-Reply-To: <13630000.1047341994@lerlaptop.iadfw.net> References: <5257.1047339488@critter.freebsd.dk> <13630000.1047341994@lerlaptop.iadfw.net>
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Lately Larry Rosenman told:
> --On Tuesday, March 11, 2003 00:38:08 +0100 Poul-Henning Kamp
> <phk@phk.freebsd.dk> wrote:
> > In message <XFMail.20030310155011.conrads@cox.net>, Conrad Sabatier
> > writes:
> >> Apparently, the nodes for the named pipes are not being created as they
> >> should.
> >>
> >> Is this a bash problem, or something in devfs not working as expected?
> > That's a good question...
> >
> > Has anybody found out what the standards conformant thing is for /dev/fd ?
> >
> > presently we do only 0,1 & 2, with the std{in,out,err} symlinks.
> >
> > If we are required to do all filedescriptors, we should do so with
> > fdescfs by default.
> It is supposed to (based on MY reading of the fd(4) man page on a UnixWare
> (SysVr5) system)
> be ALL filedescriptors.
>
> this paragraph seems to be the cogent part:
>
> These files, conventionally called /dev/fd/0, /dev/fd/1, /dev/fd/2,
> and so on, refer to files accessible through file descriptors. If file
> descriptor n is open, these two system calls have the same effect:
> fd = open("/dev/fd/n",mode);
> fd = dup(n);
i read that only concerning *open* fds. (you can't dup a closed
[non-existant] fd).
furthermore i think there was a patch floating around addressing exactly
this issue. perhaps it was even committed (i'm too lazy to search for
it). solution was to test in configure for additional fds accessible
from /dev/fd/* and build without that feature if not.
cheers
simon
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