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From: Joe Perches <joe@perches.com>
To: Ingo Molnar <mingo@kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>
Cc: Pavel Machek <pavel@ucw.cz>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	Baole Ni <baolex.ni@intel.com>,
	Russell King - ARM Linux <linux@armlinux.org.uk>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	chuansheng.liu@intel.com
Subject: Re: [PATCH] Add file permission mode helpers
Date: Wed, 03 Aug 2016 08:49:26 -0700	[thread overview]
Message-ID: <1470239366.3998.227.camel@perches.com> (raw)
In-Reply-To: <20160803081140.GA7833@gmail.com>

On Wed, 2016-08-03 at 10:11 +0200, Ingo Molnar wrote:
> * Linus Torvalds <torvalds@linux-foundation.org> wrote:
> > [ So I answered similarly to another patch, but I'll just re-iterate
> > and change the subject line so that it stands out a bit from the
> > millions of actual patches ]
> > 
> > On Tue, Aug 2, 2016 at 1:42 PM, Pavel Machek <pavel@ucw.cz> wrote:
> > > Everyone knows what 0644 is, but noone can read S_IRUSR | S_IWUSR |
> > > S_IRCRP | S_IROTH (*). Please don't do this.
> > Absolutely. It's *much* easier to parse and understand the octal
> > numbers, while the symbolic macro names are just random line noise and
> > hard as hell to understand. You really have to think about it.
> > 
> > So we should rather go the other way: convert existing bad symbolic
> > permission bit macro use to just use the octal numbers.
> In addition to that I'd love to have something even easier to read, a few common 
> variants of the permissions field of 'ls -l' pre-defined. I did some quick 
> grepping, and collected the main variants that are in use:
> 
> 		PERM_r________	0400
> 		PERM_r__r_____	0440
> 		PERM_r__r__r__	0444

[etc]

While the proposed PERM_ variants are easily read,
using a single style instead of 2+ incompatible
symbolic styles makes treewide misuse identification
via grep style tools easier.

  parent reply	other threads:[~2016-08-03 15:49 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-02 20:58 Please don't replace numeric parameter like 0444 with macro Linus Torvalds
2016-08-02 21:53 ` Rob Landley
2016-08-02 23:39 ` [PATCH] checkpatch: Look for symbolic permissions and suggest octal instead Joe Perches
2016-08-03  0:15   ` Al Viro
2016-08-03  0:30     ` Joe Perches
2016-08-15 16:38   ` Joe Perches
2016-08-03  0:42 ` Please don't replace numeric parameter like 0444 with macro Al Viro
2016-08-03  8:07   ` Konstantin Khlebnikov
2016-08-03  8:30     ` Richard Weinberger
2016-08-03  8:11 ` [PATCH] Add file permission mode helpers Ingo Molnar
2016-08-03  8:28   ` Greg Kroah-Hartman
2016-08-03  8:39     ` Ingo Molnar
2016-08-03  9:21       ` Willy Tarreau
2016-08-03  9:53     ` Marcel Holtmann
2016-08-03 15:49   ` Joe Perches [this message]
2016-08-03 16:38   ` Pavel Machek

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