From: "Torsten Bögershausen" <tboegi@web.de>
To: Jeff King <peff@peff.net>
Cc: "Junio C Hamano" <gitster@pobox.com>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"Git Mailing List" <git@vger.kernel.org>,
"John Szakmeister" <john@szakmeister.net>,
"Dennis Kaarsemaker" <dennis@kaarsemaker.net>
Subject: Re: [PATCH 3/3] cat-file: handle streaming failures consistently
Date: Wed, 31 Oct 2018 14:33:41 +0100 [thread overview]
Message-ID: <20181031133341.GA5070@tor.lan> (raw)
In-Reply-To: <20181030232337.GC32038@sigill.intra.peff.net>
On Tue, Oct 30, 2018 at 07:23:38PM -0400, Jeff King wrote:
> There are three ways to convince cat-file to stream a blob:
>
> - cat-file -p $blob
>
> - cat-file blob $blob
>
> - echo $batch | cat-file --batch
>
> In the first two, we simply exit with the error code of
> streaw_blob_to_fd(). That means that an error will cause us
> to exit with "-1" (which we try to avoid) without printing
> any kind of error message (which is confusing to the user).
>
> Instead, let's match the third case, which calls die() on an
> error. Unfortunately we cannot be more specific, as
> stream_blob_to_fd() does not tell us whether the problem was
> on reading (e.g., a corrupt object) or on writing (e.g.,
> ENOSPC). That might be an opportunity for future work, but
> for now we will at least exit with a sane message and exit
> code.
>
> Signed-off-by: Jeff King <peff@peff.net>
> ---
> builtin/cat-file.c | 16 ++++++++++++----
> 1 file changed, 12 insertions(+), 4 deletions(-)
>
> diff --git a/builtin/cat-file.c b/builtin/cat-file.c
> index 8d97c84725..0d403eb77d 100644
> --- a/builtin/cat-file.c
> +++ b/builtin/cat-file.c
> @@ -50,6 +50,13 @@ static int filter_object(const char *path, unsigned mode,
> return 0;
> }
>
> +static int stream_blob(const struct object_id *oid)
Sorry for nit-picking:
could this be renamed into stream_blob_to_stdout() ?
> +{
> + if (stream_blob_to_fd(1, oid, NULL, 0))
And I wonder if we could make things clearer:
s/1/STDOUT_FILENO/
(Stolen from fast-import.c)
> + die("unable to stream %s to stdout", oid_to_hex(oid));
> + return 0;
> +}
> +
[]
next prev parent reply other threads:[~2018-10-31 13:34 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-07 12:50 "git fsck" not detecting garbage at the end of blob object files John Szakmeister
2017-01-07 21:47 ` Dennis Kaarsemaker
2017-01-08 5:26 ` Jeff King
2017-01-13 9:15 ` John Szakmeister
2017-01-13 17:52 ` [PATCH 0/6] loose-object fsck fixes/tightening Jeff King
2017-01-13 17:54 ` [PATCH 1/6] t1450: refactor loose-object removal Jeff King
2017-01-13 17:54 ` [PATCH 2/6] sha1_file: fix error message for alternate objects Jeff King
2017-01-13 17:55 ` [PATCH 3/6] t1450: test fsck of packed objects Jeff King
2017-01-13 17:58 ` [PATCH 4/6] sha1_file: add read_loose_object() function Jeff King
2017-01-13 17:59 ` [PATCH 5/6] fsck: parse loose object paths directly Jeff King
2018-10-30 20:03 ` Infinite loop regression in git-fsck in v2.12.0 Ævar Arnfjörð Bjarmason
2018-10-30 21:35 ` Jeff King
2018-10-30 22:28 ` Junio C Hamano
2018-10-30 22:56 ` Jeff King
2018-10-30 23:12 ` Jeff King
2018-10-30 23:18 ` [PATCH 1/3] t1450: check large blob in trailing-garbage test Jeff King
2018-10-30 23:23 ` [PATCH 2/3] check_stream_sha1(): handle input underflow Jeff King
2018-10-31 4:23 ` Junio C Hamano
2018-10-31 4:30 ` Jeff King
2018-10-31 4:44 ` Junio C Hamano
2018-10-31 5:03 ` Jeff King
2018-10-31 5:13 ` Jeff King
2018-10-31 5:31 ` Junio C Hamano
2018-10-30 23:23 ` [PATCH 3/3] cat-file: handle streaming failures consistently Jeff King
2018-10-31 12:42 ` [PATCH 0/3] Add a GIT_TEST_FSCK test mode Ævar Arnfjörð Bjarmason
2018-10-31 12:42 ` [PATCH 1/3] tests: add a "env-bool" helper to test-tool Ævar Arnfjörð Bjarmason
2018-10-31 12:42 ` [PATCH 2/3] tests: mark those tests where "git fsck" fails at the end Ævar Arnfjörð Bjarmason
2018-11-01 3:37 ` Junio C Hamano
2018-10-31 12:42 ` [PATCH 3/3] tests: add a special test setup that runs "git fsck" before exiting Ævar Arnfjörð Bjarmason
2018-10-31 13:33 ` Torsten Bögershausen [this message]
2018-10-31 14:23 ` [PATCH 3/3] cat-file: handle streaming failures consistently Junio C Hamano
2018-10-31 14:37 ` Jeff King
2018-10-31 17:38 ` Eric Sunshine
2018-10-31 20:29 ` Jeff King
2018-10-30 21:56 ` Infinite loop regression in git-fsck in v2.12.0 Ævar Arnfjörð Bjarmason
2018-10-30 23:08 ` Jeff King
2017-01-13 18:00 ` [PATCH 6/6] fsck: detect trailing garbage in all object types Jeff King
2017-01-19 11:18 ` [PATCH 0/6] loose-object fsck fixes/tightening John Szakmeister
2017-01-13 9:16 ` "git fsck" not detecting garbage at the end of blob object files John Szakmeister
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