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Re: nohup dies
- X-seq: zsh-users 11888
- From: Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx>
- To: zsh-users@xxxxxxxxxx
- Subject: Re: nohup dies
- Date: Fri, 28 Sep 2007 21:56:42 +0100
- In-reply-to: Message from "Pau Amaro-Seoane" <vim.unix@xxxxxxxxxxxxxx> of "Fri, 28 Sep 2007 22:38:48 +0200." <30c383e70709281338x1f2609dcsdc4dd7283d387c1c@xxxxxxxxxxxxxx>
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"Pau Amaro-Seoane" wrote:
> I have been using zsh for a while and I like it a lot. Yet, today I
> ran into a snag...
There are various issues here...
> The problem? nohup dies in zsh 4.3.2
nohup is not a shell builtin; it's simply an executable programme that's
run by the shell and that in turn runs the command line passed as
> Today I closed the ssh session with exit and then exit again after the
> message and got this:
> zsh: you have running jobs.
> tuffi1| exit
> zsh: warning: 1 jobs SIGHUPed
>  + 18591 done nohup cat ./input |
> 18592 hangup ~pau/executables/NB4_NoPN > diagnostic
The pipeline is forked before the nohup is executed. In more detail.
zsh creates a pipeline
In the subshell, "nohup cat ./input" is run
zsh forks again
In the new subshell, ~pau/executables/... is run
So the "nohup" doesn't cover the second executable.
> When I used the cluster in my former institute everything went fine,
> and there they have zsh 4.2.4
Is it possible the option "setopt nohup" was in effect there? This has
the same effect as "nohup" for all background commands. (It's not
*quite* the same; the command nohup protects the following command line
from the signal, while the option stops the shell sending the signal
when it exits.)
> I changed the shell to ksh and the simulations (i.e. nohup) are not
> killed when I quit the session...
A lot of other shells, I presume (but I haven't actually checked)
including ksh, don't send SIGHUP to processes when the shell exits.
Peter Stephenson <p.w.stephenson@xxxxxxxxxxxx>
Web page now at http://homepage.ntlworld.com/p.w.stephenson/
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