From: Alexander Viro <viro@math.psu.edu>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Potential race in syspipe()
Date: Mon, 14 Aug 2000 00:50:44 -0400 [thread overview]
Message-ID: <Pine.GSO.4.10.10008140035390.194-100000@weyl.math.psu.edu> (raw)
In-Reply-To: <200008140430.AAA01256@cse.psu.edu>
On Mon, 14 Aug 2000 presotto@plan9.bell-labs.com wrote:
> magic in one place. I noticed your snippet didn't check the
> need to growfd after getting i, perhaps a good reason for
> findfreefd().
Didn't have to, actually - if the first for() would reach the end
of array we would have i==f->nfd and the second for() would immediately
terminate with j==f->nfd+1. After that we would get the right call of
growfd() and correct values at once.
But yes, findfreefd() makes the things more obviously correct.
[snip]
> As for create(), I'ld rather change the man page. Otherwise we'ld
> have to reserve an fd in some way before the open but not have that
> fd visible to other processes until it was assinged a channel
> or let it be step on-able by dup2...
<nods>
Al
next prev parent reply other threads:[~2000-08-14 4:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-08-14 4:30 presotto
2000-08-14 4:50 ` Alexander Viro [this message]
-- strict thread matches above, loose matches on Subject: below --
2000-08-14 1:47 presotto
2000-08-14 2:42 ` Alexander Viro
2000-08-15 19:42 ` Dan Cross
2000-08-16 11:58 ` Alexander Viro
2000-08-16 12:36 ` Boyd Roberts
2000-08-11 11:20 Alexander Viro
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