Re: Running su scripts from bash scripts

Thanks David, and Mike for great overview of my options in this case.
In fact I tried sudo even before I asked the question, but it never
accepts the password.

$ sudo "cd; ls"
Password:
Sorry, try again.
Password:
Sorry, try again.
Password:
Sorry, try again.
sudo: 3 incorrect password attempts

I checked it many times the root password I enter is correct.
There must be some setup in the system to prevent me from doing this.
Another thing is that with sudo I have to put all the commands inside
the sudo argument list, like
sudo "command1; command2; ..."
otherwise it will keep asking password for each, right?
This may still be OK, but I got to get it accept the password first.
Any ideas on what may be the reason?

Thanx
Andrei

On Sat, 4 Jun 2005, Michael Bond wrote:

> Method 5:
> 
> Use an expects script to handle it asking for a password.
> 
> Though, i highly recommend you don't use this option, it is still  
> another option.
> 
> I would probably choose the "sudo" access option that Dave Riggs  
> mentioned above.
> 
> Mike.
> [email protected]
> 
> 
> On Jun 4, 2005, at 6:18 PM, David A. Riggs wrote:
> 
> > On Sat, 2005-06-04 at 10:15 -0400, Andrei Smirnov wrote:
> >
> >> I want to execute these commands in a single script:
> >>
> >> cd Pictures/2005
> >> mkisofs -r -o tmp/Pictures2005.iso .
> >> su
> >> cdrecord -v -data dev=0,0,0 tmp/Pictures2005.iso .
> >>
> >> The problem is that after it gets to su it never continues further  
> >> with
> >> the script. I know there is a way to do it in bash, but I forgot,  
> >> and the
> >> quick look at the reference material did not lead me to any  
> >> example of
> >> this kind. In short, I want to execute a set of super-user  
> >> commands from
> >> within a script. In the simples case, it's ok if the user  
> >> executing the
> >> script is asked to enter the root password. In the best case he'll  
> >> not
> >> have to. Any example of that would be appreciated.
> >>
> >>
> >
> >
> > Method 1: Make cdrecord SUID Root
> >
> > This lets normal users execute cdrecord with root privileges, which  
> > is a
> > possible security risk. You should likely restrict this to being group
> > executable if you care. Your script stays the same, but you remove the
> > 'su' line.
> >
> > shell> chown root:root `which cdrecord`
> > shell> chmod 4111 `which cdrecord`
> >
> >
> > Method 2: 'sudo' Access
> >
> > Read the documentation on 'sudo' and set up your user or group to have
> > passwordless sudo access to cdrecord. Ditto on security concerns. Your
> > script removes the 'su' line and prepends cdrecord with 'sudo
> > cdrecord...'. You don't even have to make it passwordless if you're
> > worried about security.
> >
> >
> > Method 3: Use gnome/kde
> >
> > Install the nautilus-cd-burner extension or whatever konq's equivalent
> > is. Right click the folder Pictures/2005 and choose "burn to CD".  
> > Recent
> > gnome makes you choose "Go -> CD/DVD Creator" and drag files or  
> > folders
> > into it. Why deal with the details of creating an iso9660  
> > filesystem and
> > figuring out which virtual SCSI device to use when the GUI already
> > knows?
> >
> > Method 4: gksu
> >
> > Replace the last two lines with 'gksu cdrecord...' and a pretty GTK  
> > box
> > will ask you for the root password and execute your command.
> >
> >
> > - David A. Riggs <riggs at csee dot wvu dot edu>
> >
> > _______________________________________________
> > Morlug mailing list
> > [email protected]
> > http://mailman.morlug.org/mailman/listinfo/morlug
> >
> 
> _______________________________________________
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-- 
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Dr. Andrei Smirnov,  West Virginia University
Dept. of Mechanical and Aerospace Engineering
Morgantown WV, 26506-6106
Tel:+1(304)293 3111 x2345, fax:+1(304)2936689
Email: [email protected]
http://smirnov.mae.wvu.edu     1024D/5CEDD3E2
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