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From: Rene Kita <mail@rkta.de>
Newsgroups: comp.unix.shell
Subject: Re: Basic ps Tips
Date: Sat, 3 Aug 2024 07:08:50 -0000 (UTC)
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Sender: Rene Kita <kt@ob.rkta.de>
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Jerry Peters <jerry@example.invalid> wrote:
> Lawrence D'Oliveiro <ldo@nz.invalid> wrote:
>> On Sat, 27 Jul 2024 00:40:49 -0000 (UTC), I wrote:
[...]
>>     ps -p$(pgrep -d, bash) -wwo pid,ppid,lstart,tty,etime,cmd
>> 
>> to report all the bash sessions I have running (quite a lot). The ???ww???
>> says not to truncate the output, which is handy for long command lines.
>  
> Or just use ps -C <command>:
[...]
> Does noone know about -C? I keep seeing things like 'ps -ef | grep
> <something> in scripts to see if <something is running, rather than
> using 'ps -C'.

I did not know about it.

The man page on OpenBSD does not mention -C, but calling 'ps -C' does
not give an error. But:
#v+
$ ps -C ksh
ps: /dev/mem: Permission denied'
#v-

Dunno what to make out of it, but apparently one reason to use grep
instead of -C is portability.

>         Jerry
Rene