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From: Gioele Barabucci <gioele@svario.it>
To: dash@vger.kernel.org
Subject: Re: [PATCH] man: Document ulimit -v
Date: Thu, 21 Jan 2016 08:25:59 +0100	[thread overview]
Message-ID: <n7q168$u95$1@ger.gmane.org> (raw)
In-Reply-To: <20160121050323.GA4908@gondor.apana.org.au>

On 21/01/2016 06:03, Herbert Xu wrote:
> Jérémie Courrèges-Anglas <jca@wxcvbn.org> wrote:
>> Gioele Barabucci <gioele@svario.it> writes:
>>
>>> Document that `ulimit` can set the `RLIMIT_AS` limit (virtual memory) with
>>> the `-v` flag.
>>
>> I don't know much about RLIMIT_AS, but I know that it isn't supported on
>> all systems where dash runs, eg OpenBSD.  Maybe is it Linux-specific?
>>
>> Anyway, it would be better if the manpage said that the -v flag may not
>> be implemented on all platforms.
>>
>> The same could be said about ulimit -w. (I did not check the other flags).
> 
> Rather than doing that we could just pass the manpage through
> cpp or some similar mechanism so that this becomes conditional.

I wonder how much it is worth the effort in this case.

RLIMIT_AS is defined by POSIX [1] since 1997 [2], so one can suppose
that it is available anywhere (indeed the man page of OpenBSD refers to
the missing RLIMIT_AS as a bug). If it is not available, an invocation
of `ulimit -v` will complain about the unknown option. We could just add
to the description "(not available on systems that lack support for
RLIMIT_AS, e.g. OpenBSD)".

Other cases like `-w` can be ignored: they manipulate non-standard
RLIMIT extensions that are no-ops on Linux since long ago (and I suppose
also in other systems).

Regards,

[1] http://pubs.opengroup.org/onlinepubs/9699919799/functions/setrlimit.html
[2] http://pubs.opengroup.org/onlinepubs/7908799/xsh/sysresource.h.html

--
Gioele Barabucci <gioele@svario.it>


  reply	other threads:[~2016-01-21  7:26 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-11 19:12 Gioele Barabucci
2016-01-20 18:02 ` Jérémie Courrèges-Anglas
2016-01-21  5:03   ` Herbert Xu
2016-01-21  7:25     ` Gioele Barabucci [this message]
2016-06-06 14:45 ` Herbert Xu

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