linux-kernel - Re: Revised request_key(2) man page for review

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Date:   Sat, 17 Dec 2016 11:34:55 +0100
From:   "Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
To:     David Howells <dhowells@...hat.com>
Cc:     mtk.manpages@...il.com, keyrings@...r.kernel.org,
        linux-man <linux-man@...r.kernel.org>,
        Eugene Syromyatnikov <evgsyr@...il.com>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: Revised request_key(2) man page for review

Hello David,

On 12/15/2016 11:10 AM, David Howells wrote:
> Michael Kerrisk (man-pages) <mtk.manpages@...il.com> wrote:
> 
>>>        │Is 'keyring' allowed to be 0? Reading the source, it │
>>>        │appears so.  In this case, by default,  the  key  is │
>>>        │assigned   to   the   session   keyring.   But,  the │
>>>        │KEYCTL_SET_REQKEY_KEYRING  also  seems  to  have  an │
>>>        │influence here.  What are the details here?          │
> 
> Yes, the destination keyring can be 0.  If you don't specify a destination
> keyring, then:
> 
>  (1) If the key is found to already exist, the serial number is returned, but
>      no extra link is made.
> 
>  (2) If an error occurs other than "this key doesn't exist", then you'll just
>      get the error.
> 
>  (3) If we have to construct a new key, this will be attached to the default
>      keyring (as there's no destination keyring to attach to).

Okay. Please take a look at the revised text that I'll send out
after applying Eugene's patch. (Mail in a few minutes.)

>>>            # echo 'create user mtk:* *   /bin/keyctl instantiate %k %c %S' \
>>>                      > /etc/request-keys.conf
> 
> There's a /etc/request-keys.d/ directory now.

Yes, I'm aware. Did you mean I should fix something on this page?

Cheers,

Michael


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/