linux-kernel - Re: [RFC] scripts: kerrno.sh

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Message-ID: <5542212C.70102@nod.at>
Date:	Thu, 30 Apr 2015 14:33:48 +0200
From:	Richard Weinberger <richard@....at>
To:	dsterba@...e.cz, Bartosz Golaszewski <bgolaszewski@...libre.com>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>
Subject: Re: [RFC] scripts: kerrno.sh - errno translator

Am 30.04.2015 um 14:25 schrieb David Sterba:
> On Thu, Apr 30, 2015 at 01:29:41PM +0200, Bartosz Golaszewski wrote:
>> 2015-04-30 13:04 GMT+02:00 Richard Weinberger <richard.weinberger@...il.com>:
>>> On Thu, Apr 30, 2015 at 12:53 PM, Bartosz Golaszewski
>>> <bgolaszewski@...libre.com> wrote:
>>>> Shell script allowing to find errno definitions and descriptions in the
>>>> kernel source.
>>>>
>>>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
>>>> ---
>>>> This is a simple script I use when seeing messages like:
>>>>
>>>>         some_func() failed: -123
>>>
>>> What is wrong with a one-liner like:
>>> gcc -E -dD - < include/uapi/linux/errno.h |grep -E "^#define E.* 123$"
>>
>> Nothing really - the output is less nice, that's all.
> 
> I'd find a helper script useful in situations where I don't know the
> error code immediatelly and have to convert it from a hexa value first.
> Eg. when RAX contains an error code after a BUG_ON:
> 
> RAX: 00000000ffffffe4
> 
> this translates to -28 == -ENOSPC.

You mean a script where you can pipe a register dump into and it tries to
translate all registers values to meaningful values?
Yes, that would be nice... :)

Thanks,
//richard
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