Re: Basic ps Tips

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.