From: Paolo Bonzini <bonzini@gnu.org>
To: Johannes Sixt <j.sixt@viscovery.net>
Cc: Junio C Hamano <gitster@pobox.com>,
Karl Chen <quarl@cs.berkeley.edu>,
Git mailing list <git@vger.kernel.org>
Subject: Re: [PATCH] be paranoid about closed stdin/stdout/stderr
Date: Wed, 27 Aug 2008 10:20:23 +0200 [thread overview]
Message-ID: <48B50E47.3010402@gnu.org> (raw)
In-Reply-To: <48B4F5C4.9020404@viscovery.net>
>> Busybox. But it runs setuid, as Steven pointed out.
>
> I straced tee (it was the only tool I found that opens files for writing
> without also opening some for reading). If one of 0,1,2 is closed, it
> *does* dup() the fd that it is going to write.
To be precise, it does a blind "dup2 (fd, 3)" and goes on with file
descriptor 3.
open("foo", O_WRONLY|O_CREAT|O_TRUNC|O_LARGEFILE, 0666) = 0
fcntl64(0, F_DUPFD, 3) = 3
close(0) = 0
Paolo
next prev parent reply other threads:[~2008-08-27 8:21 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-25 8:28 [PATCH] Fix start_command() pipe bug when stdin is closed Karl Chen
2008-08-25 10:44 ` Johannes Sixt
2008-08-25 11:49 ` Paolo Bonzini
2008-08-25 12:00 ` [PATCH v2] fix start_command() " Paolo Bonzini
2008-08-25 13:12 ` Johannes Sixt
2008-08-25 13:37 ` [PATCH v2 properly indented] " Paolo Bonzini
2008-08-25 16:00 ` Karl Chen
2008-08-26 0:06 ` Junio C Hamano
2008-08-26 6:09 ` Junio C Hamano
2008-08-26 6:33 ` Johannes Sixt
2008-08-26 6:45 ` Paolo Bonzini
2008-08-26 6:48 ` [PATCH] be paranoid about closed stdin/stdout/stderr Paolo Bonzini
2008-08-26 6:57 ` Johannes Sixt
2008-08-26 7:40 ` Stephen R. van den Berg
2008-08-27 5:01 ` Avery Pennarun
2008-08-27 9:18 ` Stephen R. van den Berg
2008-08-27 12:36 ` Paolo Bonzini
2008-08-27 15:20 ` [PATCH v4] make git-shell " Paolo Bonzini
2008-08-27 17:22 ` Stephen R. van den Berg
2008-08-27 17:27 ` [PATCH] be " Junio C Hamano
2008-08-28 13:17 ` Paolo Bonzini
2008-08-28 13:58 ` Stephen R. van den Berg
2008-08-27 18:22 ` Avery Pennarun
2008-08-28 12:21 ` Nick Andrew
2008-08-28 12:52 ` Stephen R. van den Berg
2008-08-26 17:38 ` Junio C Hamano
2008-08-26 18:33 ` Paolo Bonzini
2008-08-26 22:42 ` Junio C Hamano
2008-08-26 23:04 ` Junio C Hamano
2008-08-26 23:10 ` Stephen R. van den Berg
2008-08-27 3:05 ` Karl Chen
2008-08-27 4:38 ` Paolo Bonzini
2008-08-27 9:04 ` Stephen R. van den Berg
2008-08-27 6:35 ` Johannes Sixt
2008-08-27 8:20 ` Paolo Bonzini [this message]
2008-08-27 2:04 ` Nick Andrew
2008-08-25 15:56 ` [PATCH] Fix start_command() pipe bug when stdin is closed Karl Chen
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