Re: misterious behavior of either kill or terminal

From	"J.O. Aho" <user@example.net>
Newsgroups	alt.os.linux
Subject	Re: misterious behavior of either kill or terminal
Date	2019-06-22 23:41 +0200
Message-ID	<gn7ljvFtlhkU1@mid.individual.net> (permalink)
References	<qej6cu$61p$1@dont-email.me> <qejaaj$tdb$1@dont-email.me> <qejle0$q38$1@dont-email.me> <gn64toFjchtU1@mid.individual.net> <qeluka$ad8$1@news.xmission.com>

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On 22/06/2019 21.13, Kenny McCormack wrote:
> In article <gn64toFjchtU1@mid.individual.net>,
> J.O. Aho <user@example.net> wrote:
> ...
>>>> killall dd
>>> but kill can also send signals by process name besides by PID ?
>>
>> No, it's the killall takes a name and it will kill all processes with
>> that name, if you had 10 dd running, it would kill them all.
> 
> This is the usual risk with "killall" - that you might kill processes other
> than the one you are actually interested in.
> 
> However, in this case, the risk is pretty much irrelevant, because we are
> sending specifically the USR1 signal, specifically to "dd" processes (of
> which there could in theory, though unlikely in practice, be more than one
> of) which is documented as being a supported action.  I.e., "dd" is
> documented as catching the USR1 signal and displaying a status report upon
> receipt of this signal.  This is a pretty innocuous thing for it to do.
> 
> Therefore, there's no real risk of something bad happening.  At worst,
> unrelated "dd" processes may display their status.

The risk is mainly if you switch to an Unix system, killall literally 
means kill all processes, not like in Linux where it means send a 
process signal to a subset of processes.

-- 

  //Aho

Thread

misterious behavior of either kill or terminal Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-21 20:07 +0200
  Re: misterious behavior of either kill or terminal Dan Purgert <dan@djph.net> - 2019-06-21 18:21 +0000
    Re: misterious behavior of either kill or terminal marrgol <marrgol@address.invalid> - 2019-06-22 13:27 +0200
    Re: misterious behavior of either kill or terminal Jasen Betts <jasen@xnet.co.nz> - 2019-06-23 05:31 +0000
      Re: misterious behavior of either kill or terminal "Carlos E.R." <robin_listas@es.invalid> - 2019-06-28 10:54 +0200
        Funny... (Was: misterious behavior of either kill or terminal) gazelle@shell.xmission.com (Kenny McCormack) - 2019-06-28 09:15 +0000
        Re: misterious behavior of either kill or terminal Georges <georges@prout.com> - 2019-06-28 11:35 +0200
          Re: misterious behavior of either kill or terminal "Carlos E.R." <robin_listas@es.invalid> - 2019-06-28 11:50 +0200
            Re: misterious behavior of either kill or terminal Georges <georges@prout.com> - 2019-06-28 12:21 +0200
            Re: misterious behavior of either kill or terminal Richard Kettlewell <invalid@invalid.invalid> - 2019-06-28 13:26 +0100
              Re: misterious behavior of either kill or terminal "Carlos E.R." <robin_listas@es.invalid> - 2019-06-28 14:51 +0200
                Re: misterious behavior of either kill or terminal Richard Kettlewell <invalid@invalid.invalid> - 2019-06-28 14:10 +0100
                Re: misterious behavior of either kill or terminal "Carlos E.R." <robin_listas@es.invalid> - 2019-06-28 20:06 +0200
                Re: misterious behavior of either kill or terminal Georges <georges@prout.com> - 2019-06-28 20:54 +0200
                Re: misterious behavior of either kill or terminal owl <owl@rooftop.invalid> - 2019-06-28 14:51 +0000
                Re: misterious behavior of either kill or terminal "F. Russell" <frussell@random.info> - 2019-06-28 17:40 +0000
              Re: misterious behavior of either kill or terminal Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-28 16:45 +0200
        Re: misterious behavior of either kill or terminal Jasen Betts <jasen@xnet.co.nz> - 2019-06-28 10:29 +0000
          Re: misterious behavior of either kill or terminal "Carlos E.R." <robin_listas@es.invalid> - 2019-06-28 14:54 +0200
  Re: misterious behavior of either kill or terminal "Carlos E.R." <robin_listas@es.invalid> - 2019-06-21 20:26 +0200
    Re: misterious behavior of either kill or terminal Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-22 00:02 +0200
      Re: misterious behavior of either kill or terminal "Carlos E.R." <robin_listas@es.invalid> - 2019-06-22 13:17 +0200
        Re: misterious behavior of either kill or terminal marrgol <marrgol@address.invalid> - 2019-06-22 13:32 +0200
          Re: misterious behavior of either kill or terminal Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-23 17:57 +0200
  Re: misterious behavior of either kill or terminal Paul <nospam@needed.invalid> - 2019-06-21 15:14 -0400
    Re: misterious behavior of either kill or terminal Melzzzzz <Melzzzzz@zzzzz.com> - 2019-06-21 20:42 +0000
    Re: misterious behavior of either kill or terminal Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-22 00:23 +0200
      Re: misterious behavior of either kill or terminal "J.O. Aho" <user@example.net> - 2019-06-22 09:50 +0200
        Re: misterious behavior of either kill or terminal gazelle@shell.xmission.com (Kenny McCormack) - 2019-06-22 19:13 +0000
          Re: misterious behavior of either kill or terminal "J.O. Aho" <user@example.net> - 2019-06-22 23:41 +0200
      Re: misterious behavior of either kill or terminal "Carlos E.R." <robin_listas@es.invalid> - 2019-06-22 13:30 +0200
  Re: misterious behavior of either kill or terminal "J.O. Aho" <user@example.net> - 2019-06-21 21:39 +0200
    Re: misterious behavior of either kill or terminal Soviet_Mario <SovietMario@CCCP.MIR> - 2019-06-22 00:33 +0200
      Re: misterious behavior of either kill or terminal "J.O. Aho" <user@example.net> - 2019-06-22 09:28 +0200
      Re: misterious behavior of either kill or terminal "Carlos E.R." <robin_listas@es.invalid> - 2019-06-22 13:34 +0200

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