From: Marco Felsch <m.felsch@pengutronix.de>
To: Ahmad Fatoum <a.fatoum@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH master] fs: align truncate return codes with POSIX
Date: Thu, 2 Feb 2023 14:12:16 +0100 [thread overview]
Message-ID: <20230202131216.dyebwhxmqwvz3qhi@pengutronix.de> (raw)
In-Reply-To: <20230202122000.195253-1-a.fatoum@pengutronix.de>
Hi Ahmad,
thanks for the patch.
On 23-02-02, Ahmad Fatoum wrote:
> Writing past end of a file results in a cryptic error code:
>
> barebox@board:/ cp /dev/zero /dev/mmc0.part
> write: Operation not permitted
> cp: Operation not permitted
>
> Because the cdev's truncate is not implemented and as such partition
> can't be increased in size. POSIX specifies EPERM as the correct return
> code for truncate(2) in such a situation, but for write(2) it is ENOSPC.
> Thus most truncate callbacks in barebox instead return ENOSPC, when
> according to POSIX, EPERM would have been the correct error code to
> propagate.
>
> Switching all truncate drivers is a bit more involved, so for now let's
> treat EPERM and ENOSPC instead when truncate fails to enlarge a file.
>
> Reported-by: Marco Felsch <m.felsch@pengutronix.de>
> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Reviewed-by: Marco Felsch <m.felsch@pengutronix.de>
next prev parent reply other threads:[~2023-02-02 13:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-02 12:20 Ahmad Fatoum
2023-02-02 13:12 ` Marco Felsch [this message]
2023-02-03 7:52 ` Sascha Hauer
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