From: Junio C Hamano <gitster@pobox•com>
To: Jeff King <peff@peff•net>
Cc: Jorge <griffin@gmx•es>, git@vger•kernel.org
Subject: Re: Bug: .gitconfig folder
Date: Wed, 27 May 2015 15:38:12 -0700 [thread overview]
Message-ID: <xmqq1ti1k5nv.fsf@gitster.dls.corp.google.com> (raw)
In-Reply-To: <20150527221813.GF23259@peff.net> (Jeff King's message of "Wed, 27 May 2015 18:18:13 -0400")
Jeff King <peff@peff•net> writes:
>> - die_errno("Out of memory? mmap failed");
>> + die_errno("mmap failed");
>
> This is definitely an improvement, but the real failing of that error
> message is that it does not tell us that "~/.gitconfig" is the culprit.
> I don't think we can do much from xmmap, though; it does not have the
> filename. It would be nice if we got EISDIR from open() in the first
> place, but I don't think we can implement that efficiently (if we added
> an "xopen" that checked that, it would have to stat() every file we
> opened).
The patch was meant to be a tongue-in-cheek tangent that is a vast
improvement for cases where we absolutely need to use mmap but does
not help the OP at all ;-) I do not think there is any need for the
config reader to read the existing file via mmap interface; just
open it, strbuf_read() the whole thing (and complain when it cannot)
and we should be ok.
Or do we write back through the mmaped region or something?
next prev parent reply other threads:[~2015-05-27 22:38 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-27 13:29 Bug: .gitconfig folder Jorge
2015-05-27 20:30 ` Junio C Hamano
2015-05-27 22:18 ` Jeff King
2015-05-27 22:24 ` Stefan Beller
2015-05-28 6:13 ` Jeff King
2015-05-27 22:38 ` Junio C Hamano [this message]
2015-05-28 7:51 ` Jeff King
2015-05-28 7:54 ` [PATCH 1/4] read-cache.c: drop PROT_WRITE from mmap of index Jeff King
2015-05-28 7:54 ` [PATCH 2/4] config.c: fix mmap leak when writing config Jeff King
2015-06-30 14:34 ` [PATCH] config.c: fix writing config files on Windows network shares Karsten Blees
2015-06-30 14:46 ` Torsten Bögershausen
2015-06-30 16:01 ` Jeff King
2015-06-30 14:52 ` Johannes Schindelin
2015-06-30 16:00 ` Jeff King
2015-05-28 7:56 ` [PATCH 3/4] config.c: avoid xmmap error messages Jeff King
2015-05-28 8:03 ` [PATCH 4/4] config.c: rewrite ENODEV into EISDIR when mmap fails Jeff King
2015-05-28 17:11 ` Junio C Hamano
2015-05-28 20:44 ` Jeff King
2015-05-28 21:11 ` Junio C Hamano
2015-05-28 17:06 ` Bug: .gitconfig folder Junio C Hamano
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