chown, #!command in scripts, auto-execute (.bat), etc

[Andreas <none at unet dot univie dot ac dot at>]

Larry Hall wrote:

> At 12:51 PM 3/25/2004, you wrote:
>  
>
> > Hallo!
> > I'm using CYGWIN_NT-5.1 (cygcheck.out attached)
> > *I installed Cygwin in a Subdir /cygdrive/d/temp/Cyg/, because here we don't have permissions for /. So I want to chroot to that installation-directory, for getting the programs working properly.
> > chroot $InstallROOT $InstallROOT/usr/bin/bash
> > -->> "chroot: cannot chdir to root directory: No such file or directory"
> > At home I did the same, ADDITIONALLY having /usr/bin/bash, but I get the same errors.
> >    
> This makes perfect sense to me, given your cygcheck output.  I'll give you
> a hint as to why this makes sense to me.  What is "$InstallROOT" set to?
>
>  
Hallo!
Content of $InstallROOT is in the comment (see lines below!), but that 
seems to be unimportant,
perhaps the following lines are more important than cygout.txt?! ;-)
I unpacked all to a directory (Temp), where we have write-permissions.
So "my (imaginary) Root" is that directory, and I want to chroot to that 
directory, which doesn't work. (chroot instead of mounting /)
Is mount D:/Temp /Xyz   the same as      mount /cygwin/d /Xyz ?
Why is /cygwin not named /mnt? - Why is it not possible to mount other 
things into /cygwin?
Or is /cygwin the (source-) "device" ?

> > chroot $InstallROOT; doesn't work  # InstallROOT=/cygdrive/d/Temp/Cyg
> > Also cd /; chroot .    # doesn't work
> > chroot /;    # works, but worthless
> >
> > * mount works, whereas I can't alter anything (umount, mounting others doens't work)
> >  -->> umount: /cygdrive/H: Permission denied
> > mkdir X; mount /dev/hda1 X   -->> mount: X: Invalid argument
> >  which devices are to be used? (As /dev/null nothing exists, but works)
> >    
> I think you don't understand what mount does in Cygwin.  Read 'man mount'
> and <http://cygwin.com/cygwin-ug-net/using-utils.html#MOUNT>.
>  
I read it, but it doesnt work as expected:
mkdir $HOME/L; mount -u D:/ $HOME/L
-->mount: /cygdrive/d/temp/Cyg/home//L: Invalid argument

> > * Why doesn't work #!bash ? On other systems it's enough to let it find by the $PATH.
> >    
> And what's in your path?  Would you be able to find bash in it's installed
> location using only your currently defined path as a guide?
$InstallROOT/usr/bin is in my PATH. Typing bash (or any other command) 
(in the Home-dir) works!
The problem is that under cygwin the path is not searched for any 
#!Commands (try out yourself!)


> > Extension .bat is executed by command.com, if no extension, I would like to be able to leave the #!command out!
> Sorry, I'm not sure what you're driving at with this statement, unless it
> was just meant to clarify that you cannot run 'bash' without specifying
> the full path to it.
>  
I'm speaking about the extension. Is it possible to execute any script 
(without known extension) using bash.exe,
WITHOUT having to write #!bash.exe in the first line?! (Because 
otherwise it is executed by command.com)
What does mount -x/-X/-E do in detail? (any files being interpreted as 
binary, regardless their permissions?)
-o Option (-o managed) doesn't work?

      thanks, Andrew      Please also send your reply by Email to 
k009aaka+AT+unet.univie.ac.at



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