FSpecs

FSpecs

[BEN RITCHEY]

Originally to: ALL

Would it be possible in a Bash script to munge a Long File Name to the older
DOS 8.3 format?

In my case I need the first 8 characters and the last 4 (.xxx) ... the
resulting string would then be used as an argument for another command. :)

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 : Ben        http://bellsouthpwp.net/c/m/cmech617   ICQ #32457590
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RE: FSpecs

[Paul Kraus]

It would be a lot easier to do it with gawk or perl.
-----Original Message-----
From: linux-newbie-owner@vger.kernel.org
[mailto:linux-newbie-owner@vger.kernel.org] On Behalf Of BEN RITCHEY
Sent: Thursday, November 14, 2002 3:57 AM
To: linux-newbie@vger.kernel.org
Subject: FSpecs


Originally to: ALL

Would it be possible in a Bash script to munge a Long File Name to the
older DOS 8.3 format?

In my case I need the first 8 characters and the last 4 (.xxx) ... the
resulting string would then be used as an argument for another command.
:)

--
Keep the faith,

 : Ben        http://bellsouthpwp.net/c/m/cmech617   ICQ #32457590
 :
 + WildCat! Board 24/7  (337) 232-4155  33.6kBps 8,N,1  Files!

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Re: FSpecs

[hackob]

Use cut and/or gawk



----- Original Message -----
From: "BEN RITCHEY" <linux-net@tcob1.net>
To: <linux-newbie@vger.kernel.org>
Sent: Thursday, November 14, 2002 2:56 AM
Subject: FSpecs


> Originally to: ALL
>
> Would it be possible in a Bash script to munge a Long File Name to the
older
> DOS 8.3 format?
>
> In my case I need the first 8 characters and the last 4 (.xxx) ... the
> resulting string would then be used as an argument for another command. :)
>
> --
> Keep the faith,
>
>  : Ben        http://bellsouthpwp.net/c/m/cmech617   ICQ #32457590
>  :
>  + WildCat! Board 24/7  (337) 232-4155  33.6kBps 8,N,1  Files!
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.linux-learn.org/faqs

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Re: FSpecs

[Ray Olszewski]

All the approaches suggested for this exercise assume that one need not 
worry about generating a UNIQUE 8.3 filename from the long filename. Is 
that assumption appropriate to Ben's real, underlying problem? Or does it 
risk overwriting a file with a later one (e.g., shortnam-abcd.txt and 
shortnam-efgh.txt both become shortnam.txt)?

At 02:43 PM 11/15/02 +0000, ichi@ihug.co.nz wrote:
>BEN RITCHEY wrote:
> >
> > Would it be possible in a Bash script to munge a
> > Long File Name to the older DOS 8.3 format?
> > In my case I need the first 8 characters and the
> > last 4 (.xxx)
>
>To which Paul Kraus replied:
> > It would be a lot easier to do it with gawk or perl.
>
>And hackob said:
> > Use cut and/or gawk
>
>Actually guys, all you need is bash:
>--------------------------------------------------
>example="long-filename.to.munge.txt"
>echo ${example%${example#????????}}.${example##*.}
>--------------------------------------------------




--
-------------------------------------------"Never tell me the odds!"--------
Ray Olszewski					-- Han Solo
Palo Alto, California, USA			  ray@comarre.com
-------------------------------------------------------------------------------

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Re: FSpecs

[ichi]

BEN RITCHEY wrote:
> 
> Would it be possible in a Bash script to munge a 
> Long File Name to the older DOS 8.3 format?
> In my case I need the first 8 characters and the 
> last 4 (.xxx) 

To which Paul Kraus replied:
> It would be a lot easier to do it with gawk or perl.

And hackob said:
> Use cut and/or gawk

Actually guys, all you need is bash:
--------------------------------------------------
example="long-filename.to.munge.txt"
echo ${example%${example#????????}}.${example##*.}
--------------------------------------------------

Cheers,
Steven

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Re: FSpecs

[ichi]

Ray Olszewski wrote:
> 
> > > In my case I need the first 8 characters and the
> > > last 4 (.xxx)
> >
> >--------------------------------------------------
> >example="long-filename.to.munge.txt"
> >echo ${example%${example#????????}}.${example##*.}
> >--------------------------------------------------
> 
> All the approaches suggested for this exercise assume that one 
> need not worry about generating a UNIQUE 8.3 filename from the 
> long filename. Is that assumption appropriate to Ben's real, 
> underlying problem? Or does it risk overwriting a file with a 
> later one 

OK, Ray, here's one off the top of my head.  I'm sure it 
can be improved, but it will do for a start.
-------------------------------------------------------------
#!/bin/bash
from="/home/ichi"  to="/tmp"
for i in `ls $from` ; do 
front=${i%.*} ; back=""
echo $i | grep "\." >/dev/null ; [ $? = 0 ] && back=.${i##*.}
[ ${#front} -gt 8 ] && front=${front%${front#????????}}
[ ${#back} -gt 4 ] && back=${back%${back#????}}
front=`echo $front | tr " ." "__"`
new=$front$back
for j in `ls $to` ; do
  case $j in $new) 
     echo "$new already exists.  Input new name."
     read new 
  esac
done
echo $new  ### YOUR OUTPUT ROUTINE GOES HERE ### 
done
--------------------------------------------------------------

I suppose somebody is going to tell that there is a built-in
command that does this automatically.  Ah, well.

Cheers,
Steven

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