[pm-h] Automating sudo/bash terminal

B. Estrade estrabd at gmail.com
Wed Jan 26 09:20:34 PST 2011


On Tue, Jan 25, 2011 at 05:43:58PM -0600, lee latham wrote:
> That's awesome, Brett, thanks.  I used that in combination with the
> last post on my perlmonks question to get the job done:

You are very welcome.

> 
> http://perlmonks.org/?node_id=884031
> 
> It really is hideous, but it does work :-)

I had not been on Perl Monks in ages! I updated my profile to reflect
my current info. I am, "perlfan". I need to get back into th
habit of visiting the site. :)

Brett

> 
> On Tue, Jan 25, 2011 at 10:52 AM, B. Estrade <estrabd at gmail.com> wrote:
> > On Tue, Jan 25, 2011 at 10:38:49AM -0600, lee latham wrote:
> >> Thanks for the response, Brett!
> >>
> >> No, I do not have root access or the ability to change the
> >> infrastructure I'm working under.
> >>
> >> I figured I'd pass the sudo password as an argument to the script.
> >>
> >> But can it be done?
> >
> > I wrote a test bash script that worked:
> >
> > #/bin/sh
> > sudo -S ls<<END
> > y0urP at ssword
> > END
> > ##-- end of script
> >
> > You may need to do a wrapper sudo script and have your actual work in
> > another script; I don't immediately know if passing a stream of
> > commands to sudo would necessarily be what you wanted to do:
> >
> > #/bin/sh
> > sudo -S ./realscript.sh<<END # realscript.sh contains the real work
> > y0urP at ssword
> > END
> > ##-- end of script
> >
> > I suppose you could simply chmod to 700 or 600 and issue 'sh
> > ./yoursudoscript.sh' via ssh. Ultimately, the issue protecting your
> > password.
> >
> > Hope that helps..
> >
> > Brett
> >
> >>
> >> On Tue, Jan 25, 2011 at 10:18 AM, B. Estrade <estrabd at gmail.com> wrote:
> >> > On Tue, Jan 25, 2011 at 10:17:31AM -0600, lee latham wrote:
> >> >> Hi Y'all,
> >> >>
> >> >> I'm having a surprisingly difficult time automating a terminal
> >> >> session, so I thought I'd see if you guys have any thoughts.
> >> >>
> >> >> I'm in a situation where I need to issue commands in a sudo
> >> >> environment. ?So I've got to authenticate the sudo, issue commands
> >> >> after that (this is the part I'm having trouble with), read the output
> >> >> of the commands and issue new commands based on that output. ?So
> >> >> basically I need to do like 'sudo bash' and then issue commands in
> >> >> that bash session.
> >> >>
> >> >> I've tried various tricks to no avail, and I'd really rather avoid
> >> >> using Expect, as I expect the process to get a little lengthy at
> >> >> times.
> >> >>
> >> >> The main problem, for example, is that if I simply execute `sudo
> >> >> dowhatever` via backticks or system, I still need to authenticate, and
> >> >> even if I do that then that session is immediately closed.
> >> >>
> >> >> A similar situation is when using Net::OpenSSH, and I need to, say,
> >> >> become a different user on the remote machine and issue commands as
> >> >> that user.
> >> >>
> >> >> I suspect my unix knowledge is inadequate to even properly
> >> >> understanding the problem :-)
> >> >>
> >> >> Any thoughts? ?Any input would be greatly appreciated!
> >> >
> >> > Your biggest issue is going to be maintaining security. Sounds like
> >> > you either have to store the password somewhere or allow certain
> >> > commands to be executed via sudo unencombered via password.
> >> >
> >> > Do you have root on this box?
> >> >
> >> > And I hate to give you the typical "Perlish" response, but what
> >> > exactly are you trying to do? I would imagine that if you've painted
> >> > yourself into a corner where you have to issue sudo in batch process,
> >> > there are like better solutions to what you're needing to accomplish.
> >> >
> >> > Cheers,
> >> > Brett
> >> >
> >> >>
> >> >> Best,
> >> >> Lee
> >> >> _______________________________________________
> >> >> Houston mailing list
> >> >> Houston at pm.org
> >> >> http://mail.pm.org/mailman/listinfo/houston
> >> >> Website: http://houston.pm.org/
> >> >
> >> > --
> >> > B. Estrade <estrabd at gmail.com>
> >> > _______________________________________________
> >> > Houston mailing list
> >> > Houston at pm.org
> >> > http://mail.pm.org/mailman/listinfo/houston
> >> > Website: http://houston.pm.org/
> >> >
> >> _______________________________________________
> >> Houston mailing list
> >> Houston at pm.org
> >> http://mail.pm.org/mailman/listinfo/houston
> >> Website: http://houston.pm.org/
> >
> > --
> > B. Estrade <estrabd at gmail.com>
> > _______________________________________________
> > Houston mailing list
> > Houston at pm.org
> > http://mail.pm.org/mailman/listinfo/houston
> > Website: http://houston.pm.org/
> >
> _______________________________________________
> Houston mailing list
> Houston at pm.org
> http://mail.pm.org/mailman/listinfo/houston
> Website: http://houston.pm.org/

-- 
B. Estrade <estrabd at gmail.com>


More information about the Houston mailing list