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From: Thomas Rast <trast@student.ethz.ch>
To: Johannes Sixt <j6t@kdbg.org>
Cc: Junio C Hamano <gitster@pobox.com>,
	git@vger.kernel.org, Jeff King <peff@peff.net>,
	Alexander Potashev <aspotashev@gmail.com>
Subject: Re: [PATCH v2 1/3] Introduce die_errno() that appends strerror(errno) to die()
Date: Sat, 6 Jun 2009 22:56:31 +0200	[thread overview]
Message-ID: <200906062256.34074.trast@student.ethz.ch> (raw)
In-Reply-To: <200906062236.42858.j6t@kdbg.org>

Johannes Sixt wrote:
> On Samstag, 6. Juni 2009, Thomas Rast wrote:
> > +void die_errno(const char *err, ...)
> > +{
> > +	va_list params;
> > +	char msg[1024];
> > +
> > +	va_start(params, err);
> > +
> > +	vsnprintf(msg, sizeof(msg), err, params);
> > +	die("%s: %s", msg, strerror(errno));
> 
> Cannot vsnprintf potentially modify errno?

Manpage turns up nothing, so AFAICT, no.

> > +
> > +	va_end(params);
> 
> This va_end should better be before die().

Not that I object to changing it, but out of curiosity, what do I
break by putting it after?

-- 
Thomas Rast
trast@{inf,student}.ethz.ch

  reply	other threads:[~2009-06-06 20:56 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-02 21:34 [PATCH] add strerror(errno) to die() calls where applicable Thomas Rast
2009-06-03  1:55 ` Jeff King
     [not found]   ` <2325a7950906031855t1977448lbb1c8aa671c72f3d@mail.gmail.com>
2009-06-04  1:58     ` Alexander Potashev
2009-06-04 20:32       ` Jeff King
2009-06-04  2:05   ` [PATCH] diesys calls die and also reports strerror(errno) Alexander Potashev
2009-06-04 20:50     ` Jeff King
2009-06-04 21:13       ` Junio C Hamano
2009-06-05  6:25       ` Johannes Sixt
2009-06-05  7:12         ` Junio C Hamano
2009-06-06 22:09           ` Jeff King
2009-06-06 13:09   ` [PATCH] add strerror(errno) to die() calls where applicable Thomas Rast
2009-06-06 14:44     ` [PATCH v2 0/3] Thomas Rast <trast@student.ethz.ch> Thomas Rast
2009-06-08 21:02       ` [PATCH v3 0/3] die_errno() Thomas Rast
2009-06-27 15:58         ` [PATCH v4 0/4] die_errno() Thomas Rast
2009-06-27 15:58           ` [PATCH v4 1/4] Introduce die_errno() that appends strerror(errno) to die() Thomas Rast
2009-06-27 15:58           ` [PATCH v4 2/4] die_errno(): double % in strerror() output just in case Thomas Rast
2009-06-27 15:58           ` [PATCH v4 3/4] Convert existing die(..., strerror(errno)) to die_errno() Thomas Rast
2009-06-27 15:58           ` [PATCH v4 4/4] Use die_errno() instead of die() when checking syscalls Thomas Rast
2009-06-27 18:38           ` [PATCH v4 0/4] die_errno() Junio C Hamano
2009-06-08 21:02       ` [PATCH v3 1/3] Introduce die_errno() that appends strerror(errno) to die() Thomas Rast
2009-06-08 22:07         ` Jeff King
2009-06-09  8:22           ` Thomas Rast
2009-06-09  8:53             ` Jeff King
2009-06-09  9:29               ` Andreas Ericsson
2009-06-08 21:02       ` [PATCH v3 2/3] Convert existing die(..., strerror(errno)) to die_errno() Thomas Rast
2009-06-08 21:02       ` [PATCH v3 3/3] Use die_errno() instead of die() when checking syscalls Thomas Rast
2009-06-06 14:44     ` [PATCH v2 1/3] Introduce die_errno() that appends strerror(errno) to die() Thomas Rast
2009-06-06 20:36       ` Johannes Sixt
2009-06-06 20:56         ` Thomas Rast [this message]
2009-06-06 21:17           ` Johannes Sixt
2009-06-06 22:47           ` Jeff King
2009-06-06 22:13       ` Jeff King
2009-06-07 11:12         ` Alexander Potashev
2009-06-07 16:57           ` Junio C Hamano
2009-06-08 12:36             ` Jeff King
2009-06-08 15:35               ` Alexander Potashev
2009-06-08 22:04                 ` Jeff King
2009-06-06 14:44     ` [PATCH v2 2/3] Convert existing die(..., strerror(errno)) to die_errno() Thomas Rast
2009-06-06 20:31       ` Johannes Sixt
2009-06-06 14:44     ` [PATCH v2 3/3] Use die_errno() instead of die() when checking syscalls Thomas Rast
2009-06-06 21:02       ` Johannes Sixt
2009-06-06 22:27         ` Thomas Rast

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