From: "Marco Costalba" <mcostalba@gmail.com>
To: git@vger.kernel.org
Subject: Re: [PATCH] Added support for dropping privileges to git-daemon.
Date: Sat, 19 Aug 2006 17:19:30 +0200 [thread overview]
Message-ID: <e5bfff550608190819i3cade548g28b2c95fab172a49@mail.gmail.com> (raw)
In-Reply-To: <20060819132922.GA6644@code-monkey.de>
On 8/19/06, Tilman Sauerbeck <tilman@code-monkey.de> wrote:
> Marco Costalba [2006-08-19 15:23]:
> > >
> > >+ if (!user ^ !group)
> > >+ die("either set both user and group or none of them");
> > >+
> > >
> >
> > Just a question. Why simply not
> >
> > if (user ^ group)
>
> Because gcc doesn't like that:
> error: invalid operands to binary ^
>
Interesting!
Indeed gcc it's right, operator ^ it's a bitwise operator, not a
logical one. So operands must be booleans (or numerical types in case
of C).
The trick is that operator '!' performs an implicit conversion to
integral on the 'user' and 'group' pointers.
BTW the following (very ugly) works.
if ((int)user ^ (int)group)
next prev parent reply other threads:[~2006-08-19 15:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-19 12:27 [PATCH] Added support for dropping privileges to git-daemon Tilman Sauerbeck
2006-08-19 13:23 ` Marco Costalba
2006-08-19 13:29 ` Tilman Sauerbeck
2006-08-19 15:19 ` Marco Costalba [this message]
2006-08-19 15:22 ` Marco Costalba
2006-08-19 17:15 ` Mitchell Blank Jr
2006-08-19 13:32 ` Johannes Schindelin
2006-08-19 17:25 ` Mitchell Blank Jr
2006-08-19 12:27 ` Tilman Sauerbeck
2006-08-22 6:38 ` Junio C Hamano
2006-08-22 17:37 ` Tilman Sauerbeck
2006-08-22 23:40 ` Junio C Hamano
2006-08-23 16:45 ` Tilman Sauerbeck
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