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From: Rene Kita <mail@rkta.de>
Newsgroups: comp.unix.shell
Subject: Re: Basic ps Tips
Date: Mon, 5 Aug 2024 05:55:12 -0000 (UTC)
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Christian Weisgerber <naddy@mips.inka.de> wrote:
> On 2024-08-03, Joerg Mertens <joerg-mertens@t-online.de> wrote:
> 
> [OpenBSD ps(1)]
>>>>> $ ps -C ksh
>>>>> ps: /dev/mem: Permission denied'
>>
>> The error message also is printed, when you run ps with a valid
>> flag plus some string, like `ps -a xyz´, so it seems to be independent
>> of the `-C´-option.  Maybe it has to do with parsing of the old-style
>> flags vs. the dashed ones.
> 
> A quick look at the options parsing shows that
> 
>   ps xxx [yyy [zzz]]
> 
> is equivalent to
> 
>   ps -N xxx [-M yyy [-W zzz]]
[...]

Thanks for this explanation. Might be worth to document this in the man
page.