Re: Another problem; Bash

Re: Another problem; Bash

[Jason Tishler]

In the future, please post to the Cygwin mailing list instead of sending
private email so others can benefit too.  This is especially true after an
email such as the following:

On Fri, Jul 20, 2001 at 10:46:42PM +0200, mxgl@usa.net wrote:
> Jason Tishler <Jason.Tishler@dothill.com> wrote:
> > Please use Cygwin's setup.exe to install (all of) Cygwin.  Otherwise,
> > it is inappropriate to ask for help on the mailing list.
> 
>   You will probably allow me to use the above remark as a highly        
> instructive illustration of what I would call, to put it mildly, patent
> inawareness of argumentative circularity, if you do not, I will be no less
> thankful for your quick and immediate help, with hindsight, of course, I
> should seriously have weighed alternative options first, before bothering
> You, ... it will never happen again ...

Hmm...

Anyway, on to your most recent problem.

On Fri, Aug 03, 2001 at 01:36:32PM +0200, mxgl@usa.net wrote:
> I have run into another problem, I have been able to pinpoint it, but cannot
> come up with a solution.
> 
> When I write the line "let i=$i+1" into a scriptfile and try to execute it, I
> get the message "let: Not found",

Does the script start with "#! /bin/sh"?  If so, then your problem is
that ash (i.e., /bin/sh under Cygwin) does not support "let".

> if I execute the same file as dotscript ". scriptfile", I get no error
> message,

The above works because bash is processing the script instead of ash
even if it contains the "#! /bin/sh" trigger line.

> it seems no RESERVED WORDS are recognized in scriptfile, if not run as dot
> script,

Not true, other keywords such as "for" are recognized by ash -- just not
"let" (and possibly other bash keywords).

> Is this standard behaviour of bash under cygwin, or is it a problem.

This is standard Cygwin ash behavior and IMO, is not a problem.

Jason

-- 
Jason Tishler
Director, Software Engineering       Phone: 732.264.8770 x235
Dot Hill Systems Corp.               Fax:   732.264.8798
82 Bethany Road, Suite 7             Email: jason@tishler.net
Hazlet, NJ 07730 USA                 WWW:   http://www.dothill.com

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Re: Another problem; Bash

[Sandeep Tamhankar]

This is all true; but if you want to use /bin/sh (a.k.a. ash) and run 
the script, change the 'let' line to the following:

i=`/usr/bin/expr $i + 1`

That way, it doesn't matter which shell you're running your script in.

-Sandeep

Jason Tishler wrote:

> In the future, please post to the Cygwin mailing list instead of sending
> private email so others can benefit too.  This is especially true after an
> email such as the following:
> 
> On Fri, Jul 20, 2001 at 10:46:42PM +0200, mxgl@usa.net wrote:
> 
>>Jason Tishler <Jason.Tishler@dothill.com> wrote:
>>
>>>Please use Cygwin's setup.exe to install (all of) Cygwin.  Otherwise,
>>>it is inappropriate to ask for help on the mailing list.
>>>
>>  You will probably allow me to use the above remark as a highly        
>>instructive illustration of what I would call, to put it mildly, patent
>>inawareness of argumentative circularity, if you do not, I will be no less
>>thankful for your quick and immediate help, with hindsight, of course, I
>>should seriously have weighed alternative options first, before bothering
>>You, ... it will never happen again ...
>>
> 
> Hmm...
> 
> Anyway, on to your most recent problem.
> 
> On Fri, Aug 03, 2001 at 01:36:32PM +0200, mxgl@usa.net wrote:
> 
>>I have run into another problem, I have been able to pinpoint it, but cannot
>>come up with a solution.
>>
>>When I write the line "let i=$i+1" into a scriptfile and try to execute it, I
>>get the message "let: Not found",
>>
> 
> Does the script start with "#! /bin/sh"?  If so, then your problem is
> that ash (i.e., /bin/sh under Cygwin) does not support "let".
> 
> 
>>if I execute the same file as dotscript ". scriptfile", I get no error
>>message,
>>
> 
> The above works because bash is processing the script instead of ash
> even if it contains the "#! /bin/sh" trigger line.
> 
> 
>>it seems no RESERVED WORDS are recognized in scriptfile, if not run as dot
>>script,
>>
> 
> Not true, other keywords such as "for" are recognized by ash -- just not
> "let" (and possibly other bash keywords).
> 
> 
>>Is this standard behaviour of bash under cygwin, or is it a problem.
>>
> 
> This is standard Cygwin ash behavior and IMO, is not a problem.
> 
> Jason
> 
> 


-- 
---------------------------------------------
Sandeep V. Tamhankar			
Member of Technical Staff		
Tel: (408) 220-7505
Fax: (408) 774-2002
Email: sandman@interwoven.com

Visit http://www.interwoven.com
Moving Business to the Web	


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