Re: misterious behavior of either kill or terminal

From	Soviet_Mario <SovietMario@CCCP.MIR>
Newsgroups	alt.os.linux
Subject	Re: misterious behavior of either kill or terminal
Date	2019-06-28 16:45 +0200
Organization	A noiseless patient Spider
Message-ID	<qf596t$421$1@dont-email.me> (permalink)
References	(2 earlier) <qen2qn$fmb$2@gonzo.revmaps.no-ip.org> <171huf-87h.ln1@Telcontar.valinor> <qf4n03$8cd$1@gioia.aioe.org> <7g4huf-cfj.ln1@Telcontar.valinor> <87mui16gm6.fsf@LkoBDZeT.terraraq.uk>

Show all headers | View raw

On 28/06/19 14:26, Richard Kettlewell wrote:
> "Carlos E.R." <robin_listas@es.invalid> writes:
>> On 28/06/2019 11.35, Georges wrote:
>>> Le 28/06/2019 à 10:54, Carlos E.R. a écrit :
>>>> Why should a process die if sent a signal that it doesn't handle?
>>>> SIGUSR1,2 are defined by the application. What they mean is entirely up
>>>> to the application, there is no default action.
>>>>
>>>
>>> Hi Carlos, if no handler found, the SIGUSR1 and SIGUSR2 default action
>>> is 'term'(inate) the process.
>>>
>>> http://man7.org/linux/man-pages/man7/signal.7.html
>>
>> I looked at the manual before writing. I still do not see it. What it
>> says is:
>>
>>         SIGUSR1      P1990      Term    User-defined signal 1
>>         SIGUSR2      P1990      Term    User-defined signal 2
>                                   ^^^^
> Here -----------------------------/
> 
>> That's it. However, there is another paragraph I see when searching for
>> "default":
>>
>>         Unlike standard signals, real-time signals have no predefined
>>         meanings: the entire set of real-time signals can be used for
>>         application-defined purposes.
>>
>>         The default action for an unhandled real-time signal is to
>>         terminate the receiving process.
> 
> Irrelevant, SIGUSR1 is not a real-time signal.
> 
>> But my question remains: why should the default action be terminate the
>> program, and not ignore? I find this absurd. What is the logic in
>> terminating the program on ANY unknown signal?
> 
> You could as easily ask what the point of ignoring any unknown signal
> would be.

well, in real world the logic is

I am a worker
Manager A tells me : DO this task ZZ
afterwards
Manager B tells me : @§#!!??G
Me : (not understanding) keep on working on task ZZ (the 
only certain thing)

Well this I was thinking when wrecklessly sending signals in 
a bottle :)

> 


-- 
1) Resistere, resistere, resistere.
2) Se tutti pagano le tasse, le tasse le pagano tutti
Soviet_Mario - (aka Gatto_Vizzato)

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

csiph-web