weird mneisa/escript problem in r13

[Garry Hodgson-2]

i am using mnesia from within some escript code, and i cannot get
it to work on both r13b01 and r13b02-2.  the error occurs when i call
mnesia:create_schema( [Node] ).  i specify an mnesia dir on line 2 of
the escript code using one of:

1) %%! -mnesia dir '"test/bunderl"'
2) %%! -mneisa dir "test/bunderl"

when i use version 1, it works on r13b01, but fails on r13b02-2 with:
{"Cannot create Mnesia dir",
"/home/garry/admin/\"test/bunderl\"", enoent}}
and yes, the appropriate dirs exist, and it fails the same if i clean
it out between runs.  i am running it from /home/garry/admin, and
test/bundle exists and is writable and all that.

when i use version 2, it works on r13b02-2, but fails on r13b01 with:
=ERROR REPORT==== 2-Nov-2009::23:28:06 ===
application_controller: bad term: test/bunderl
escript: exception throw: {create_failed,bunderl@k2,
                      {application_load_error,
                          {bad_environment_value,"test/bunderl"}}}

am i doing something wrong, or is there a bug in one or the other of
these releases?


--
Garry Hodgson
Lead Member of Technical Staff
AT&T Chief Security Office (CSO)

"This e-mail and any files transmitted with it are AT&T property, are
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[Yogish Baliga]

Try

-mnesia dir '"test/bunderl"'

NOTE: double quote within single quotes/

-- baliga


"Point of view is worth 80 IQ points" --Alan Kay

http://dudefrommangalore.blogspot.com/





________________________________
From: Garry Hodgson <garry@...>
To: erlang-questions@...
Sent: Mon, November 2, 2009 8:45:48 PM
Subject: [erlang-questions] weird mneisa/escript problem in r13

i am using mnesia from within some escript code, and i cannot get
it to work on both r13b01 and r13b02-2.  the error occurs when i call
mnesia:create_schema( [Node] ).  i specify an mnesia dir on line 2 of
the escript code using one of:

1) %%! -mnesia dir '"test/bunderl"'
2) %%! -mneisa dir "test/bunderl"

when i use version 1, it works on r13b01, but fails on r13b02-2 with:
{"Cannot create Mnesia dir",
"/home/garry/admin/\"test/bunderl\"", enoent}}
and yes, the appropriate dirs exist, and it fails the same if i clean
it out between runs.  i am running it from /home/garry/admin, and test/bundle exists and is writable and all that.

when i use version 2, it works on r13b02-2, but fails on r13b01 with:
=ERROR REPORT==== 2-Nov-2009::23:28:06 ===
application_controller: bad term: test/bunderl
escript: exception throw: {create_failed,bunderl@k2,
                     {application_load_error,
                         {bad_environment_value,"test/bunderl"}}}

am i doing something wrong, or is there a bug in one or the other of these releases?


-- Garry Hodgson
Lead Member of Technical Staff
AT&T Chief Security Office (CSO)

"This e-mail and any files transmitted with it are AT&T property, are confidential, and are intended solely for the use of the individual or entity to whom this e-mail is addressed. If you are not one of the named recipient(s) or otherwise have reason to believe that you have received this message in error, please notify the sender and delete this message immediately from your computer. Any other use, retention, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited."

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[Garry Hodgson-2]

Yogish Baliga wrote:
> Try
>
> -mnesia dir '"test/bunderl"'
>
> NOTE: double quote within single quotes/

i'm sorry i didn't make it clear in my post, but that's what version 1 is.


--
Garry Hodgson
AT&T Chief Security Office (CSO)

"This e-mail and any files transmitted with it are AT&T property, are confidential, and are intended solely for the use of the individual or entity to whom this e-mail is addressed. If you are not one of the named recipient(s) or otherwise have reason to believe that you have received this message in error, please notify the sender and delete this message immediately from your computer. Any other use, retention, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited."



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[Yogish Baliga]

Looks like there is some shell interpretation going on.

What is the output of  application:get_all_env(mnesia)?

Also can you try without quotes?

-- baliga
 
"Point of view is worth 80 IQ points" --Alan Kay

http://dudefrommangalore.blogspot.com/





________________________________
From: Garry Hodgson <garry@...>
To: Yogish Baliga <yogishb@...>
Cc: erlang-questions@...
Sent: Tue, November 3, 2009 5:05:30 AM
Subject: Re: [erlang-questions] weird mneisa/escript problem in r13

Yogish Baliga wrote:
> Try
>
> -mnesia dir '"test/bunderl"'
>
> NOTE: double quote within single quotes/

i'm sorry i didn't make it clear in my post, but that's what version 1 is.


--
Garry Hodgson
AT&T Chief Security Office (CSO)

"This e-mail and any files transmitted with it are AT&T property, are confidential, and are intended solely for the use of the individual or entity to whom this e-mail is addressed. If you are not one of the named recipient(s) or otherwise have reason to believe that you have received this message in error, please notify the sender and delete this message immediately from your computer. Any other use, retention, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited."



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erlang-questions (at) erlang.org

[Garry Hodgson-2]

Yogish Baliga wrote:
> Looks like there is some shell interpretation going on.
>
> What is the output of  application:get_all_env(mnesia)?
>
> Also can you try without quotes?
i've tried it both ways, as mentioned in the original post.  the problem
is not
getting this to work.  i can do that easily.  the problem is that it
behaves so
differently in two very similar versions r13b01 and r13b02.  i see
nothing in
the release notes to inidicate such a change, so i thought i'd mention
it, in
case it was a bug.


--
Garry Hodgson
AT&T Chief Security Office (CSO)

"This e-mail and any files transmitted with it are AT&T property, are confidential, and are intended solely for the use of the individual or entity to whom this e-mail is addressed. If you are not one of the named recipient(s) or otherwise have reason to believe that you have received this message in error, please notify the sender and delete this message immediately from your computer. Any other use, retention, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited."



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[Håkan Mattsson-2]

On Wed, Nov 4, 2009 at 4:50 AM, Garry Hodgson <garry@...> wrote:

> Yogish Baliga wrote:
>>
>> Looks like there is some shell interpretation going on.
>>
>> What is the output of  application:get_all_env(mnesia)?
>>
>> Also can you try without quotes?
>
> i've tried it both ways, as mentioned in the original post.  the problem is
> not getting this to work.  i can do that easily.  the problem is that it behaves
> so differently in two very similar versions r13b01 and r13b02.  i see nothing
> in the release notes to inidicate such a change, so i thought i'd mention it,
> in case it was a bug.

It was a bug, but it isn't anymore.

In earlier releases, the arguments on the escript line beginning with
%%! was passed to the virtual machine via an environment variable. As
a side effect of this the arguments was mangled a bit, causing some of
the quotation marks to disappear. This was fixed in Erts 5.7.3
(OTP-1060). The arguments are now passed to the VM as they are written
in the escript, without any mangling. Unfortunately this bug fix was
not documented. I hope that has not caused you too much trouble.

/Håkan
---
Håkan Mattsson (uabhams)
Erlang/OTP, Ericsson AB

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[Garry Hodgson-2]

Håkan Mattsson wrote:

 > It was a bug, but it isn't anymore.

cool.

 > In earlier releases, the arguments on the escript line beginning with
 > %%! was passed to the virtual machine via an environment variable. As
 > a side effect of this the arguments was mangled a bit, causing some of
 > the quotation marks to disappear. This was fixed in Erts 5.7.3
 > (OTP-1060). The arguments are now passed to the VM as they are written
 > in the escript, without any mangling. Unfortunately this bug fix was
 > not documented. I hope that has not caused you too much trouble.

it wasn't a big deal.  just wanted to mention it in case it was unknown.
thanks for the info.

--
Garry Hodgson
AT&T Chief Security Office (CSO)

"This e-mail and any files transmitted with it are AT&T property, are confidential, and are intended solely for the use of the individual or entity to whom this e-mail is addressed. If you are not one of the named recipient(s) or otherwise have reason to believe that you have received this message in error, please notify the sender and delete this message immediately from your computer. Any other use, retention, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited."



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