sudo: no tty present and no askpass program specified

[Josef Wolf]

On Thu, Feb 25, 2010 at 02:58:13PM -0500, Tom H wrote:
> > On karmic, I have put the following line into my sudoers file
> >
> >  naclt ALL = NOPASSWD: /usr/local/bin/naclient
> >
> > to allow execution of this program as root from remote hosts. So from the
> > remote host, I do
> >
> >  /usr/bin/ssh -i /home/me/.ssh/naclt-dsa \
> >              -o "ServerAliveInterval 60" \
> >              -o "ServerAliveCountMax 3" \
> >              naclt at server.my.domain \
> >              /usr/bin/sudo /usr/local/bin/naclient version
> >
> > But sudo errors out:
> >
> >  sudo: no tty present and no askpass program specified
> >
> > Why is sudo trying to ask a password here? Did it not get the NOPASSWD
> > option?
> >
> > This works perfectly fine with jaunty with exactly the same sudoers file.
> 
> http://www.sudo.ws/pipermail/sudo-users/2009-August/004140.html

Thanks for the fast response, Tom!

I understand that sudo refuses to ask for a password if there's no tty.
But I have explicitly told it _not_ to ask with the NOPASSWD option. So
there's no reason for sudo to refuse, since it should not try to ask in
the first place.