git.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
To: Jeff King <peff@peff.net>
Cc: "SZEDER Gábor" <szeder.dev@gmail.com>,
	"Git mailing list" <git@vger.kernel.org>,
	"Clemens Buchacher" <drizzd@gmx.net>
Subject: Re: t5570-git-daemon fails with SIGPIPE on OSX
Date: Sat, 2 Mar 2019 22:21:00 +0100 (STD)	[thread overview]
Message-ID: <nycvar.QRO.7.76.6.1903022209110.45@tvgsbejvaqbjf.bet> (raw)
In-Reply-To: <20190301190042.GF30847@sigill.intra.peff.net>

Hi Peff,

On Fri, 1 Mar 2019, Jeff King wrote:

> diff --git a/builtin/fetch.c b/builtin/fetch.c
> index b620fd54b4..4ba63d5ac6 100644
> --- a/builtin/fetch.c
> +++ b/builtin/fetch.c
> @@ -1556,7 +1556,9 @@ static int fetch_one(struct remote *remote, int argc, const char **argv, int pru
>  
>  	sigchain_push_common(unlock_pack_on_signal);
>  	atexit(unlock_pack);
> +	sigchain_push(SIGPIPE, SIG_IGN);
>  	exit_code = do_fetch(gtransport, &rs);
> +	sigchain_pop(SIGPIPE);
>  	refspec_clear(&rs);
>  	transport_disconnect(gtransport);
>  	gtransport = NULL;

That indeed does the job:

	https://git.visualstudio.com/git/_build/results?buildId=358

> That said, I actually think it's kind of pointless for git-fetch to use
> SIGPIPE at all. The purpose of SIGPIPE is that you can write a naive
> program that spews output, and you'll get informed (forcefully) by the
> OS if the process consuming your output stops listening. That makes
> sense for programs like "git log", whose primary purpose is generating
> output.
> 
> But for git-fetch, our primary purpose is receiving data and writing it
> to disk. We should be checking all of our write()s already, and SIGPIPE
> is just confusing. The only "big" output we generate is the status table
> at the end. And even if that is going to a pipe that closes, I don't
> think we'd want to fail the whole command (we'd want to finalize any
> writes for what we just fetched, clean up after ourselves, etc).
> 
> So I'd actually be fine with just declaring that certain commands (like
> fetch) just ignore SIGPIPE entirely.

That's a bigger change than I'm comfortable with, so I'd like to go with
tge diff you gave above.

Do you want to turn these two patches into a proper patch series?
Otherwise I can take care of it, probably this Monday or Tuesday.

Ciao,
Dscho

  reply	other threads:[~2019-03-02 21:21 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-06 15:11 t5570-git-daemon fails with SIGPIPE on OSX SZEDER Gábor
2018-08-06 15:31 ` SZEDER Gábor
2019-02-08  8:32   ` Johannes Schindelin
2019-02-08 12:54     ` SZEDER Gábor
2018-08-14 22:32 ` Jeff King
2018-08-14 22:37   ` Jeff King
2019-02-08  9:02   ` Johannes Schindelin
2019-02-08  9:28     ` Johannes Schindelin
2019-02-08 19:54       ` Jeff King
2019-03-01 15:02         ` Johannes Schindelin
2019-03-01 19:00           ` Jeff King
2019-03-02 21:21             ` Johannes Schindelin [this message]
2019-03-03 16:54               ` Jeff King
2019-03-03 16:55                 ` [PATCH 1/2] fetch: avoid calling write_or_die() Jeff King
2019-03-04 13:42                   ` Duy Nguyen
2019-03-05  4:11                     ` Jeff King
2019-03-03 16:58                 ` [PATCH 2/2] fetch: ignore SIGPIPE during network operation Jeff King
2019-03-04  1:11                   ` Junio C Hamano
2019-03-05  4:11                     ` Jeff King
2019-03-03  1:21             ` t5570-git-daemon fails with SIGPIPE on OSX Junio C Hamano
2019-03-03 14:56               ` Johannes Schindelin

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=nycvar.QRO.7.76.6.1903022209110.45@tvgsbejvaqbjf.bet \
    --to=johannes.schindelin@gmx.de \
    --cc=drizzd@gmx.net \
    --cc=git@vger.kernel.org \
    --cc=peff@peff.net \
    --cc=szeder.dev@gmail.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).