Accessing folders elsewhere than C:\cygwin

Accessing folders elsewhere than C:\cygwin

[Fergus]

I have Cygwin mounted conventionally under Q:\cygwin.
I would like to access files under Q:\else.
But (for example) ls ../../.. only ever attains \cygwin (and lower).
I can use ls /cygdrive/q/else/ (and lower) but this means knowing the 
drive name (in this case Q:)
I don't much want to change mount points which are currently 
conventionally defined.
Is there a way I can get to Q:\else without knowing the drive name Q:?
Thank you.
Fergus


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Re: Accessing folders elsewhere than C:\cygwin

[Greg Chicares]

On 2011-02-09 14:42Z, Fergus wrote:
> I have Cygwin mounted conventionally under Q:\cygwin.
> I would like to access files under Q:\else.
> But (for example) ls ../../.. only ever attains \cygwin (and lower).
> I can use ls /cygdrive/q/else/ (and lower) but this means knowing the 
> drive name (in this case Q:)
> I don't much want to change mount points which are currently 
> conventionally defined.
> Is there a way I can get to Q:\else without knowing the drive name Q:?

ls `cygpath -m /`/../else

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Re: Accessing folders elsewhere than C:\cygwin

[Jeremy Bopp]

On 02/09/2011 08:42 AM, Fergus wrote:
> I have Cygwin mounted conventionally under Q:\cygwin.
> I would like to access files under Q:\else.
> But (for example) ls ../../.. only ever attains \cygwin (and lower).
> I can use ls /cygdrive/q/else/ (and lower) but this means knowing the
> drive name (in this case Q:)
> I don't much want to change mount points which are currently
> conventionally defined.
> Is there a way I can get to Q:\else without knowing the drive name Q:?

If creating a new mount in addition to your standard mounts is out of
the question (not sure if that's what you meant), you could add
something like the following to your .bashrc or .bash_profile file:

function else_path {
  cygpath -u $(cygpath -m /)/../else
}

Then you could refer to the path as follows:

ls $(else_path)
cd $(else_path)

Another option would be to create a temporary mount within one of your
startup files:

mount | grep -q 'on /mnt/else type' ||
  mount $(cygpath -m)/../else /mnt/else

Now you can access Q:\else as /mnt/else.  If you decide you would like
to make a more permanent mount but just for your user, you can read in
the Cygwin Users Guide for how to set that up in a file under
/etc/fstab.d/.  Of course, you can also make the mount available to all
users by adding it to /etc/fstab. :-)

-Jeremy

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Re: Accessing folders elsewhere than C:\cygwin

[Andrew Schulman]

> I have Cygwin mounted conventionally under Q:\cygwin.
> I would like to access files under Q:\else.
> But (for example) ls ../../.. only ever attains \cygwin (and lower).
> I can use ls /cygdrive/q/else/ (and lower) but this means knowing the 
> drive name (in this case Q:)

Well at some level you're going to have to know the drive name - either in
the path you specify, or in a mount point or a symlink.

> I don't much want to change mount points which are currently 
> conventionally defined.
> Is there a way I can get to Q:\else without knowing the drive name Q:?

You don't have to change any existing mount points, but you can add a new
one in /etc/fstab, e.g.

Q:/else  /else  some_fs  binary 0 0

Or create a symlink:

ln -s /cygdrive/Q/else /else


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Re: Accessing folders elsewhere than C:\cygwin

[Jeremy Bopp]

On 02/09/2011 09:50 AM, Jeremy Bopp wrote:
> mount | grep -q 'on /mnt/else type' ||
>   mount $(cygpath -m)/../else /mnt/else
                     ^^^
I lost a slash in the above code.  It should be as follows:

mount | grep -q 'on /mnt/else type' ||
  mount $(cygpath -m /)/../else /mnt/else

-Jeremy

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Re: Accessing folders elsewhere than C:\cygwin

[Corinna Vinschen]

On Feb  9 15:37, Greg Chicares wrote:
> On 2011-02-09 14:42Z, Fergus wrote:
> > I have Cygwin mounted conventionally under Q:\cygwin.
> > I would like to access files under Q:\else.
> > But (for example) ls ../../.. only ever attains \cygwin (and lower).
> > I can use ls /cygdrive/q/else/ (and lower) but this means knowing the 
> > drive name (in this case Q:)
> > I don't much want to change mount points which are currently 
> > conventionally defined.
> > Is there a way I can get to Q:\else without knowing the drive name Q:?
> 
> ls `cygpath -m /`/../else

This might result in a DOS path warning, but you can create a variable
containing the parent dir of the Cygwin root as POSIX path without
triggering the DOS path warning:

  cygwin_parent=$(cygpath -ua $(cygpath -ma /)/..)


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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RE: Accessing folders elsewhere than C:\cygwin

[Buchbinder, Barry (NIH/NIAID) [E]]

Corinna Vinschen wrote
>  cygwin_parent=$(cygpath -ua $(cygpath -ma /)/..)

Might the ability to identify cygwin's root be a good
thing to add to cygpath?  (Note: I'm not commenting on
Corinna's proposal per se - hers was just the latest
email in this thread.)

Under "System information", one could have an option

  -R, --root    output cygwin root directory

where

$ cygpath -Rw
C:\cygwin

$ cygpath -Ru
/cygdrive/c/cygwin

or, if the cygdrive prefix has been changed to a simple /,

$ cygpath -Ru
/c/cygwin

Just an idea.  Unfortunately, I cannot propose a patch.

Thanks for considering this.

- Barry
  Disclaimer: Statements made herein are not made on behalf of NIAID.

Re: Accessing folders elsewhere than C:\cygwin

[Eric Blake]

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On 02/10/2011 10:13 AM, Buchbinder, Barry (NIH/NIAID) [E] wrote:
> Might the ability to identify cygwin's root be a good
> thing to add to cygpath?

And what's so hard about 'cygpath -w /'?

> Under "System information", one could have an option
> 
>   -R, --root    output cygwin root directory
> 
> where
> 
> $ cygpath -Rw
> C:\cygwin

Trading / for -R doesn't justify the bloat and burning another short
option character, in my opinion.

-- 
Eric Blake   eblake@redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org


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Re: Accessing folders elsewhere than C:\cygwin

[RISINGP1]

Eric wrote on 02/10/2011 12:15:33 PM:

> On 02/10/2011 10:13 AM, Buchbinder, Barry (NIH/NIAID) [E] wrote:
> > Might the ability to identify cygwin's root be a good
> > thing to add to cygpath?
> 
> And what's so hard about 'cygpath -w /'?
> 
> > Under "System information", one could have an option
> > 
> >   -R, --root    output cygwin root directory
> > 
> > where
> > 
> > $ cygpath -Rw
> > C:\cygwin
> 
> Trading / for -R doesn't justify the bloat and burning another short
> option character, in my opinion.
> 
> -- 
> Eric Blake   eblake at redhat dot com    +1-801-349-2682
> Libvirt virtualization library http://libvirt.org
> 

If you need it ofetn enough, here is a simple script for displaying the 
cygwin root:

case $1 in
    -w)
        mount | grep " / " | cut -d" " -f1 | sed 's:/:\\:g'
        ;;
    -u)
        DRIVE=$(mount | grep " / " | cut -d":" -f1):
        echo $(mount | grep "^$DRIVE " | \
        cut -d" " -f3)$(mount | grep " / " | cut -d" " -f1) | \
        sed 's/'$DRIVE'//'
        ;;
    *)
        echo "Please specify -w (Windows) or -u (Unix)"
        ;;
esac

- Phil

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Re: Accessing folders elsewhere than C:\cygwin

[Christopher Faylor]

On Thu, Feb 10, 2011 at 03:23:38PM -0500, RISINGP1@nationwide.com wrote:
>Eric wrote on 02/10/2011 12:15:33 PM:
>
>> On 02/10/2011 10:13 AM, Buchbinder, Barry (NIH/NIAID) [E] wrote:
>> > Might the ability to identify cygwin's root be a good
>> > thing to add to cygpath?
>> 
>> And what's so hard about 'cygpath -w /'?
>> 
>> > Under "System information", one could have an option
>> > 
>> >   -R, --root    output cygwin root directory
>> > 
>> > where
>> > 
>> > $ cygpath -Rw
>> > C:\cygwin
>> 
>> Trading / for -R doesn't justify the bloat and burning another short
>> option character, in my opinion.
>
>If you need it ofetn enough, here is a simple script for displaying the 
>cygwin root:
>
>case $1 in
>    -w)
>        mount | grep " / " | cut -d" " -f1 | sed 's:/:\\:g'
>        ;;
>    -u)
>        DRIVE=$(mount | grep " / " | cut -d":" -f1):
>        echo $(mount | grep "^$DRIVE " | \
>        cut -d" " -f3)$(mount | grep " / " | cut -d" " -f1) | \
>        sed 's/'$DRIVE'//'
>        ;;
>    *)
>        echo "Please specify -w (Windows) or -u (Unix)"
>        ;;
>esac

Why would we need a simple script to display the cygwin root when
"cygpath -w /" works fine?

cgf

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Re: Accessing folders elsewhere than C:\cygwin

[RISINGP1]

cygwin-owner wrote on 02/10/2011 03:35:53 PM:

> 
> On Thu, Feb 10, 2011 at 03:23:38PM -0500, RISINGP1 wrote:
> >Eric wrote on 02/10/2011 12:15:33 PM:
> >
> >> On 02/10/2011 10:13 AM, Buchbinder, Barry (NIH/NIAID) [E] wrote:
> >> > Might the ability to identify cygwin's root be a good
> >> > thing to add to cygpath?
> >> 
> >> And what's so hard about 'cygpath -w /'?
> >> 
> >> > Under "System information", one could have an option
> >> > 
> >> >   -R, --root    output cygwin root directory
> >> > 
> >> > where
> >> > 
> >> > $ cygpath -Rw
> >> > C:\cygwin
> >> 
> >> Trading / for -R doesn't justify the bloat and burning another short
> >> option character, in my opinion.
> >
> >If you need it ofetn enough, here is a simple script for displaying the 

> >cygwin root:
> >
> >case $1 in
> >    -w)
> >        mount | grep " / " | cut -d" " -f1 | sed 's:/:\\:g'
> >        ;;
> >    -u)
> >        DRIVE=$(mount | grep " / " | cut -d":" -f1):
> >        echo $(mount | grep "^$DRIVE " | \
> >        cut -d" " -f3)$(mount | grep " / " | cut -d" " -f1) | \
> >        sed 's/'$DRIVE'//'
> >        ;;
> >    *)
> >        echo "Please specify -w (Windows) or -u (Unix)"
> >        ;;
> >esac
> 
> Why would we need a simple script to display the cygwin root when
> "cygpath -w /" works fine?
> 
> cgf
> 

OK.  You are right (somehow I missed the "cygpath -w /" mention in the 
thread - oops).

Change

        -w)
               mount | grep " / " | cut -d" " -f1 | sed 's:/:\\:g'
               ;;

to

        -w)
               cygpath -w /
               ;;

But "cygpath -u /" will give "/" as an answer.  The script will give (for 
me) "/cygdrive/c/cygwin".

I was merely trying to offer an alternative to Barry's request for the 
"-R" option on cygpath.  Specifically, it answers this part of his 
request:

> $ cygpath -Ru
> /cygdrive/c/cygwin
> 
> or, if the cygdrive prefix has been changed to a simple /,
> 
> $ cygpath -Ru
> /c/cygwin

- Phil

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