RE: md5sum of a CD

RE: md5sum of a CD

[Hughes, Bill]

>> From: Hughes, Bill Sent: 01 September 2003 11:20
>> 
>> >On 2003/09/01 11:06 Corinna Vinschen wrote:
>> >>On Mon, Sep 01, 2003 at 05:56:19AM -0300, romildo@xxxx wrote:
>> >> How can one find the md5sum of a CD
>> >> in Windows?
>> >> In Linux, one can do
>> >>   $ md5sum /dev/cdrom
>> >$ md5sum /dev/scdX
>> >with X in 0..15
>> 
>> I don't have a /dev!
>> My CD is mounted 
>> q: on /cdrom type system (binmode)
>> It all seems to work, should I be doing something different?
>> 
>> It's actually a CDRW, I couldn't see in the archive or docs 
>> if cd writing is
>> supported under cygwin, I did look.
>> 
>From: Vince Hoffman Sent: 01 September 2003 11:37
>
>The /dev directory is a "virtual" directory, much like the /proc directory.
>if you do a ls /dev/scd0 you should get a result. Also see
>http://www.cygwin.com/cygwin-ug-net/using-specialnames.html
>
Duh! after 'mount -b //./q: /dev/scd0' all is rosy.
Thank you - I _have_ rtfm, but I expect my eyes glazed over as I probably
didn't understand it all at the time. It's one of those probably
insurmountable problems I suppose (not thick users) - how to cross reference
a document under any reasonable heading that could be looked for? I may be
making excuses (but _not_ complaining) but "Special Filenames/Posix
Devices/" wasn't the first place I thought to look for access to cdrom -
this is likely because I've spent too much time on windows and not enough on
unix/linux. I do really like cygwin as I would have a much harder time
without it.


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Re: md5sum of a CD

[Corinna Vinschen]

On Mon, Sep 01, 2003 at 12:22:30PM +0100, Hughes, Bill wrote:
> >From: Vince Hoffman Sent: 01 September 2003 11:37
> > Also see
> >http://www.cygwin.com/cygwin-ug-net/using-specialnames.html
> >
> Duh! after 'mount -b //./q: /dev/scd0' all is rosy.

Don't do this.  Read the above document again, carefully.  Using mount
is unnecessary.  It was only necessary until Cygwin 1.3.3.   Please
read again, beginning with the paragraph starting with

  "Since Cygwin 1.3.4 raw devices are accessible from inside of Cygwin
   processes using fixed POSIX device names. [...]"

Corinna

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RE: md5sum of a CD

[Hannu E K Nevalainen (garbage mail)]

> From: cygwin-owner@cygwin.com [mailto:cygwin-owner@cygwin.com]On Behalf
> Of Corinna Vinschen

> On Mon, Sep 01, 2003 at 05:41:06PM +0200, Hannu E K Nevalainen
> (garbage mail) wrote:

> > >   $ md5sum /dev/cdrom
> >
> >  This won't work on cygwin (nor in Windows AFAIK).
> > [...]
> > Igor, CGF, ...? Please verify, is this correctly understood/described?
>
> Corinna perhaps?

 =-)

>  Hint: Reading the whole thread before replying is
> useful sometimes.
>
> Corinna

 I do exactly that - all the time. I was slow on replying though - I got the
other responses while sending mine.

/Hannu E K Nevalainen, B.Sc. EE Microcomputer systems - 59?16.37'N,
17?12.60'E
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RE: md5sum of a CD

[Hannu E K Nevalainen (garbage mail)]

> -----Original Message-----
> From: cygwin-owner@cygwin.com [mailto:cygwin-owner@cygwin.com]On Behalf
> Of Vince Hoffman
> Sent: Monday, September 01, 2003 12:37 PM
> To: 'Hughes, Bill'; 'cygwin@cygwin.com'
> Subject: RE: md5sum of a CD
>
>
> The /dev directory is a "virtual" directory, much like the /proc
> directory.
> if you do a ls /dev/scd0 you should get a result. Also see
> http://www.cygwin.com/cygwin-ug-net/using-specialnames.html

Ouch! 8-7

 As I understand this a very longstanding change (from cygwin 1.3.4)...
I have a clear(!?) recollection of reading about this *NOT* beeing possible.

***  Sorry for the high confusion factor!  ***

/Hannu E K Nevalainen, B.Sc. EE Microcomputer systems - 59°16.37'N,
17°12.60'E
--END OF MESSAGE--


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Re: md5sum of a CD

[Corinna Vinschen]

On Mon, Sep 01, 2003 at 05:41:06PM +0200, Hannu E K Nevalainen (garbage mail) wrote:
> > From: cygwin-owner@cygwin.com [mailto:cygwin-owner@cygwin.com]On Behalf
> > Of romildo@uber.com.br
> 
> > How can one find the md5sum of a CD
> > in Windows?
> >
> > In Linux, one can do
> >
> >   $ md5sum /dev/cdrom
> 
>  This won't work on cygwin (nor in Windows AFAIK).
> [...]
> Igor, CGF, ...? Please verify, is this correctly understood/described?

Corinna perhaps?  Hint: Reading the whole thread before replying is
useful sometimes.

Corinna

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RE: md5sum of a CD

[Hannu E K Nevalainen (garbage mail)]

> From: cygwin-owner@cygwin.com [mailto:cygwin-owner@cygwin.com]On Behalf
> Of romildo@uber.com.br

> How can one find the md5sum of a CD
> in Windows?
>
> In Linux, one can do
>
>   $ md5sum /dev/cdrom

 This won't work on cygwin (nor in Windows AFAIK).
Cygwin is an emulated environment, which depends entirely (exception;
managed mode fs) on Windows for its filesystem; thus no possible way to do
this.

Unless you're knowledgable enough yourself to implement it within the Cygwin
filesystem _emulation_.

Igor, CGF, ...? Please verify, is this correctly understood/described?

/Hannu E K Nevalainen, B.Sc. EE Microcomputer systems - 59°16.37'N,
17°12.60'E
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RE: md5sum of a CD

[Hughes, Bill]

Sent: 01 September 2003 15:32 From: Corinna Vinschen 
>On Mon, Sep 01, 2003 at 02:12:32PM +0100, Hughes, Bill wrote:
>> to something like:
>> "Windows NT/W2K/XP additionally support raw devices like floppies, disks,
>> partitions and tapes. These are accessed from Cygwin applications using
>> POSIX device names."
>> 
>> The next para starts "Beginning with Cygwin 1.3.4" so it's apparent that
>> it's a change from previous behaviour.
>
>Uhm, the next para starts with "Up to Cygwin 1.3.3 ...".  Actually I
>didn't want to remove the pointer to some old method involving mount
>points since there might be still people out there using this technique.
>They should know that they should do something as a switch over, therefore
>words as "discouraged".

Actually I cut the whole paragraph starting "Up to Cygwin 1.3.3 ...", hence
'The next para starts "Beginning with Cygwin 1.3.4" '
It probably doesn't format too well in email.
I considered the point about deprecated methods and you could add a footnote
with a link to the old method.
Glad to be of service.


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Re: md5sum of a CD

[Corinna Vinschen]

On Mon, Sep 01, 2003 at 02:12:32PM +0100, Hughes, Bill wrote:
> to something like:
> "Windows NT/W2K/XP additionally support raw devices like floppies, disks,
> partitions and tapes. These are accessed from Cygwin applications using
> POSIX device names."
> 
> The next para starts "Beginning with Cygwin 1.3.4" so it's apparent that
> it's a change from previous behaviour.

Uhm, the next para starts with "Up to Cygwin 1.3.3 ...".  Actually I
didn't want to remove the pointer to some old method involving mount
points since there might be still people out there using this technique.
They should know that they should do something as a switch over, therefore
words as "discouraged".

> I hope the feedback is useful, even if you don't agree with the suggestion.
> Thanks again.

Yes, it was helpful.

Thanks,
Corinna

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RE: md5sum of a CD

[Hughes, Bill]

Sent: 01 September 2003 13:57 From: Corinna Vinschen 
>Thank you for your help.
>
>I've changed the description how to access raw devices.  The way how to
>mount these devices is entirely gone.  Please read it again and report
>back, if the description of raw devices is a bit clearer now.

Definitely better, but why not change:
"Windows NT/W2K/XP additionally support raw devices like floppies, disks,
partitions and tapes. These are accessed from Cygwin applications using
POSIX device names which are supported in two different ways.

Up to Cygwin 1.3.3 the only way to access those devices was to mount the
Win32 device names to a POSIX device name but this usage is discouraged
since Cygwin 1.3.4 and only kept for backward compatibility."

to something like:
"Windows NT/W2K/XP additionally support raw devices like floppies, disks,
partitions and tapes. These are accessed from Cygwin applications using
POSIX device names."

The next para starts "Beginning with Cygwin 1.3.4" so it's apparent that
it's a change from previous behaviour.

You could even go for :
"Windows NT/W2K/XP additionally support raw devices like floppies, disks,
partitions and tapes. These are accessed from Cygwin applications using
POSIX device names, beginning with Cygwin 1.3.4 these raw devices are
accessible ...."

I hope the feedback is useful, even if you don't agree with the suggestion.
Thanks again.


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Re: md5sum of a CD

[Corinna Vinschen]

On Mon, Sep 01, 2003 at 01:36:26PM +0100, Hughes, Bill wrote:
> >Sent: 01 September 2003 13:14 From: Corinna Vinschen
> >
> >Don't do this.  Read the above document again, carefully.  Using mount
> >is unnecessary.  It was only necessary until Cygwin 1.3.3.   Please
> >read again, beginning with the paragraph starting with
> >
> >  "Since Cygwin 1.3.4 raw devices are accessible from inside of Cygwin
> >   processes using fixed POSIX device names. [...]"
> 
> Understood. I umounted and it works, of course.
> I think I tried md5sum /dev/scd0 and _thought_ it hadn't worked.  I probably
> wasn't waiting long enough and Ctrl-Ced, assuming it had either hung or was
> waiting for console input.
> Patience and understanding are good, I need more of both, I shall work on
> them.
> Thank you for your help.

I've changed the description how to access raw devices.  The way how to
mount these devices is entirely gone.  Please read it again and report
back, if the description of raw devices is a bit clearer now.

Thanks,
Corinna

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RE: md5sum of a CD

[Hughes, Bill]

>Sent: 01 September 2003 13:14 From: Corinna Vinschen
>
>Don't do this.  Read the above document again, carefully.  Using mount
>is unnecessary.  It was only necessary until Cygwin 1.3.3.   Please
>read again, beginning with the paragraph starting with
>
>  "Since Cygwin 1.3.4 raw devices are accessible from inside of Cygwin
>   processes using fixed POSIX device names. [...]"

Understood. I umounted and it works, of course.
I think I tried md5sum /dev/scd0 and _thought_ it hadn't worked.  I probably
wasn't waiting long enough and Ctrl-Ced, assuming it had either hung or was
waiting for console input.
Patience and understanding are good, I need more of both, I shall work on
them.
Thank you for your help.


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RE: md5sum of a CD

[Vince Hoffman]

The /dev directory is a "virtual" directory, much like the /proc directory.
if you do a ls /dev/scd0 you should get a result. Also see
http://www.cygwin.com/cygwin-ug-net/using-specialnames.html



> -----Original Message-----
> From: Hughes, Bill [mailto:Bill.Hughes@cox.co.uk]
> Sent: 01 September 2003 11:20
> To: 'cygwin@cygwin.com'
> Subject: RE: md5sum of a CD
> 
> 
> >On 2003/09/01 11:06 Corinna Vinschen wrote:
> >>On Mon, Sep 01, 2003 at 05:56:19AM -0300, romildo@uber.com.br wrote:
> >> Hello.
> >> 
> >> How can one find the md5sum of a CD
> >> in Windows?
> >> 
> >> In Linux, one can do
> >> 
> >>   $ md5sum /dev/cdrom
> >$ md5sum /dev/scdX
> >with X in 0..15
> 
> I don't have a /dev!
> My CD is mounted 
> q: on /cdrom type system (binmode)
> It all seems to work, should I be doing something different?
> 
> It's actually a CDRW, I couldn't see in the archive or docs 
> if cd writing is
> supported under cygwin, I did look.
> 
> 
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RE: md5sum of a CD

[Hughes, Bill]

>On 2003/09/01 11:06 Corinna Vinschen wrote:
>>On Mon, Sep 01, 2003 at 05:56:19AM -0300, romildo@uber.com.br wrote:
>> Hello.
>> 
>> How can one find the md5sum of a CD
>> in Windows?
>> 
>> In Linux, one can do
>> 
>>   $ md5sum /dev/cdrom
>$ md5sum /dev/scdX
>with X in 0..15

I don't have a /dev!
My CD is mounted 
q: on /cdrom type system (binmode)
It all seems to work, should I be doing something different?

It's actually a CDRW, I couldn't see in the archive or docs if cd writing is
supported under cygwin, I did look.


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Re: md5sum of a CD

[Corinna Vinschen]

On Mon, Sep 01, 2003 at 05:56:19AM -0300, romildo@uber.com.br wrote:
> Hello.
> 
> How can one find the md5sum of a CD
> in Windows?
> 
> In Linux, one can do
> 
>   $ md5sum /dev/cdrom

$ md5sum /dev/scdX

with X in 0..15

Corinna

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md5sum of a CD

[romildo]

Hello.

How can one find the md5sum of a CD
in Windows?

In Linux, one can do

  $ md5sum /dev/cdrom

Regards

Romildo
-- 
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Departamento de Computação       malaquias@iceb.ufop.br
Univ. Federal de Ouro Preto  http://uber.com.br/romildo

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