From: Daniel Shahaf <d.s@daniel.shahaf.name>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: zsh-users@zsh.org
Subject: Re: Backgrounding part of 'ssh-agent $cmd'
Date: Mon, 21 Jan 2013 05:58:26 +0200 [thread overview]
Message-ID: <20130121035826.GC2968@lp-shahaf.local> (raw)
In-Reply-To: <130118073522.ZM24670@torch.brasslantern.com>
Bart Schaefer wrote on Fri, Jan 18, 2013 at 07:35:22 -0800:
> On Jan 18, 4:13pm, Daniel Shahaf wrote:
> >
> > The part that I find less than ideal so far is that, under load, the GUI
> > ssh-askpass dialog appears after foo_main has started.
>
> You could do it like this:
>
> ( # Subshell so caller's environment won't be changed; could instead
> # declare locals, but this is immune to changes in ssh-agent
> eval `ssh-agent`
> ssh-add ~/.ssh/foo.id_rsa
> {
> for h in host1 host2 host3; do
> ssh -MNf $h &
> done
> wait
> } always {
> ssh-agent -k
> } &
> )
>
> Then you don't have to background foo_ssh_preseed, and your preferred
> order of events is retained.
Thanks! This makes the ssh prompt textual again, while keeping the loop
backgrounded; that's perfect.
To summarise, now I have:
foo_ssh_preseed() {
if [ -S ~/.ssh/ControlPath/host1 ]
then
return
fi
zsh -fc '
# Subshell so caller"s environment won"t be changed; could instead
# declare locals, but this is immune to changes in ssh-agent
eval `ssh-agent | tee /dev/stderr`
ssh-add ~/.ssh/foo.id_rsa
{
for h in \
host1 host2 host3 \
; do
ssh -MNf $h &
done
wait
} always {
ssh-agent -k
} &
'
}
Which relies on ControlPath,ServerAliveInterval,IdentityFile being set
in ~/.ssh/config.
I also had the subshell use -f --- mainly because I didn't know of
anything else in my configuration would interfere with the always{}
block, but upon review I notice it has the side-effect of making the
enclosing function a valid /bin/sh function.
Thanks again.
Daniel
prev parent reply other threads:[~2013-01-21 3:58 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-16 6:59 Daniel Shahaf
2013-01-16 17:35 ` Bart Schaefer
2013-01-18 6:18 ` Daniel Shahaf
2013-01-18 7:26 ` Bart Schaefer
2013-01-18 14:13 ` Daniel Shahaf
2013-01-18 15:35 ` Bart Schaefer
2013-01-21 3:58 ` Daniel Shahaf [this message]
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