Re: [PATCH] access.2: explain how access() check treats capabilities

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Hi Michael,

On 02/05/2015 11:44 AM, Michael Kerrisk (man-pages) wrote:
> On 09/10/2014 03:01 PM, Denys Vlasenko wrote:
>> We have users who are terribly confused why their binaries
>> with CAP_DAC_OVERRIDE capability see EACCESS from access() calls,
>> but are able to read the file.
>>
>> The reason is access() isn't the "can I read/write/execute this file?"
>> question, it is the "(assuming that I'm a setuid binary,) can *the user
>> who invoked me* read/write/execute this file?" question.
>>
>> That's why it uses real UIDs as documented, and why it ignores
>> capabilities when capability-endored binaries are run by non-root
>> (this patch adds this information).
>>
>> To make users more likely to notice this less-known detail,
>> the patch expands the explanation with rationale for this logic
>> into a separate paragraph.
> 
> Thanks, Denys. Applied.

I don't see it in git://git.kernel.org/pub/scm/docs/man-pages/man-pages.git

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