Finding a share's directory spec

[NetworkElf]

Hi all,

I'm writing a service that needs to discover the full directory path for a
given locally based share at startup. IOW, I need to have the service
running on someserver to take \\someserver\so meshare and give me
c:\somedir\some dir\shareddir.

I'm not quite sure where to start reading about how to do this. Could
someone give me a push in the right direction, please?

Thank you.

ne.

[zacks@construction-imaging.com]

Re: Finding a share's directory spec

On Apr 27, 10:39 am, "NetworkElf " <Network...@nos pam.nospamwrote :

Hi all,
>
I'm writing a service that needs to discover the full directory path for a
given locally based share at startup. IOW, I need to have the service
running on someserver to take \\someserver\so meshare and give me
c:\somedir\some dir\shareddir.
>
I'm not quite sure where to start reading about how to do this. Could
someone give me a push in the right direction, please?
>
Thank you.
>
ne.

A real kludgy way to do it would be to fire off a Command Prompt
Window process, feed it the "NET SHARE <sharename>" command and parse
the output for the path.

[NetworkElf]

Re: Finding a share's directory spec


<zacks@construc tion-imaging.comwrot e in message
news:1177685666 .994446.320930@ r35g2000prh.goo glegroups.com.. .

On Apr 27, 10:39 am, "NetworkElf " <Network...@nos pam.nospamwrote :

>I'm writing a service that needs to discover the full directory path for
>a
>given locally based share at startup. IOW, I need to have the service
>running on someserver to take \\someserver\so meshare and give me
>c:\somedir\som edir\shareddir.
>>
>I'm not quite sure where to start reading about how to do this. Could
>someone give me a push in the right direction, please?

>
A real kludgy way to do it would be to fire off a Command Prompt
Window process, feed it the "NET SHARE <sharename>" command and parse
the output for the path.
>

I had considered that, but decided I'd rather avoid that route if I can. I'm
certain the functionality is within vb.net, I've just not been able to find
what I need yet.

Thank you.

[Matthias Tacke]

Re: Finding a share's directory spec

NetworkElf wrote:

>
I had considered that, but decided I'd rather avoid that route if I can. I'm
certain the functionality is within vb.net, I've just not been able to find
what I need yet.
>

There is a wmi class win32_ShareToDi rectory.

Found it with scriptomatic for wsh/vbs.

This is my untested try to convert to vb.net

' The wmi Win32_ShareToDi rectory class allows you to get that information
' You need to add a reference to System.Manageme nt for this example.

Dim moReturn As Management.Mana gementObjectCol lection
Dim moSearch As Management.Mana gementObjectSea rcher
Dim mo As Management.Mana gementObject

moSearch = New Management.Mana gementObjectSea rcher(_
"Select * from Win32_ShareToDi rectory")

moReturn = moSearch.Get

For Each mo In moReturn
Debug.WriteLine (mo("Share"))
Debug.Indent()
Debug.WriteLine (mo("SharedElem ent"))
Debug.Unindent( )
Next


HTH

--
Greetings
Matthias

[NetworkElf]

Re: Finding a share's directory spec


"Matthias Tacke" <Matthias@Tacke .dewrote in message
news:f0tc19$7ie $1@news.albasan i.net...

NetworkElf wrote:

>>
>I had considered that, but decided I'd rather avoid that route if I can.
>I'm certain the functionality is within vb.net, I've just not been able
>to find what I need yet.
>>

There is a wmi class win32_ShareToDi rectory.
>

Thank you. It seems as if I were on the correct track earlier, but I didn't
pursue it far enough. This is very helpful.

At the moment, I'm suffering from post-lunch malaise after being attacked by
an Indian buffet. I'll take a shot at it next week and post my results.

[Jeffrey Tan[MSFT]]

Re: Finding a share's directory spec

Hi,

Yes, you may query this information through WMI Win32_Share class. More
specific, Win32_Share.Pat h property contains the local path to this share.
The code snippet works well on my side:

Dim objClass As New Management.Mana gementClass("Wi n32_Share")
Dim objShare As Management.Mana gementObject
For Each objShare In objClass.GetIns tances()
Console.WriteLi ne(String.Forma t("{0} -{1}",
objShare.Proper ties("Name").Va lue, objShare.Proper ties("Path").Va lue))
Next objShare

Hope it helps.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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[NetworkElf]

Re: Finding a share's directory spec


""Jeffrey Tan[MSFT]"" <jetan@online.m icrosoft.comwro te in message
news:HLHTm6wiHH A.4332@TK2MSFTN GHUB02.phx.gbl. ..

Hi,
>
Yes, you may query this information through WMI Win32_Share class. More
specific, Win32_Share.Pat h property contains the local path to this share.
The code snippet works well on my side:
>
Dim objClass As New Management.Mana gementClass("Wi n32_Share")
Dim objShare As Management.Mana gementObject
For Each objShare In objClass.GetIns tances()
Console.WriteLi ne(String.Forma t("{0} -{1}",
objShare.Proper ties("Name").Va lue, objShare.Proper ties("Path").Va lue))
Next objShare

Thank you, Jeffrey.

[Jeffrey Tan[MSFT]]

Re: Finding a share's directory spec

Ok, if you still need any help or have any concern, please feel free to
tell me, thanks.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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[NetworkElf]

Re: Finding a share's directory spec

----- Original Message -----
From: ""Jeffrey Tan[MSFT]"" <jetan@online.m icrosoft.com>
Newsgroups: microsoft.publi c.dotnet.langua ges.vb
Sent: Monday, April 30, 2007 10:06 PM
Subject: Re: Finding a share's directory spec

Ok, if you still need any help or have any concern, please feel free to
tell me, thanks.

You shouldn't have asked... :D

I used the following code:

Dim VPHOMEpath As String = ""
Dim objClass As New Management.Mana gementClass("Wi n32_Share")
Dim objShare As Management.Mana gementObject

For Each objShare In objClass.GetIns tances()

If objShare.Proper ties("Name").Va lue = "VPHOME" Then

VPHOMEpath = objShare.Proper ties("Path").Va lue

End If

Next objShare

Now, if I use it in a standard vb.net app and run it, VPHOMEpath gets the
proper path returned and everything runs fine. If I take the exact same code
and paste it into another project that's running as a service, the wheels
fly off the wagon. Apparently, objShare.Proper ties("Path").Va lue returns a
null value when running as a service.

Now, the only difference I can think of is that the standard app is running
under my credentials and the service is running on the local service
account. I would prefer not to run it under a userID if I can avoid it...

Does anyone have any thoughts?

Thank you.

[NetworkElf]

Re: Finding a share's directory spec


"NetworkElf " <NetworkElf@nos pam.nospamwrote in message
news:eOloiDPjHH A.4772@TK2MSFTN GP05.phx.gbl...

>
Now, the only difference I can think of is that the standard app is
running under my credentials and the service is running on the local
service account. I would prefer not to run it under a userID if I can
avoid it...
>

This was the problem. When I switched it from running under NT
AUTHORITY\Local Service to Log on as: Local System account, the problem went
away. I'm still not totally clear as to why.

Any insights would be welcome.

Thanks,

ne.

[Jeffrey Tan[MSFT]]

Re: Finding a share's directory spec

Hi,

Sorry for the late response, I am out of office these 2 days.

Ok, I will perform research on this problem and get back to you ASAP.
Thanks.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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[Jeffrey Tan[MSFT]]

Re: Finding a share's directory spec

Hi,

By writting a sample in Windows Service, I can reproduce your problem. It
seems that the code works well under LocalService account while failed to
get "Path" property. I am suspecting it is a security problem. I will spend
more time to dig into it. Thanks for your patient.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
=============== =============== =============== =====
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=============== =============== =============== =====
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[Jeffrey Tan[MSFT]]

Re: Finding a share's directory spec

Hi,

Sorry for letting you wait.

I am currently contacting the WMI team for collaborating troubleshoot this
issue now, and I finally got response from a developer from WMI team. I
have passed the sample Windows Service project to them for local reproduce
and my OS version information. Once we got any findings, I will feedback
here ASAP. Thanks for your patient.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
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=============== =============== =============== =====
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[Jeffrey Tan[MSFT]]

Re: Finding a share's directory spec

Hi,

Sorry for letting you wait.

Further discussion with the WMI team shows that LocalService account does
not have permission to access the path for shares. You may view the DACL on
shared folders in Computer Management->System Tools -Shared Folders ->
Shares. You may right click any share folder in right panel and view the
"Security" tabpage.

As you can see, LocalSystem and Administrators will be granted full control
access to them, while LocalService does not have an ACE entry, which means
the LocalService will have no access to them.

Currently, due to the constraint DACL setting on the shared folder, we have
to run the service under Administrators account or LocalSystem account.

Hope this helps.

Best regards,
Jeffrey Tan
Microsoft Online Community Support
=============== =============== =============== =====
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Engineer within 1 business day is acceptable. Please note that each follow
up response may take approximately 2 business days as the support
professional working with you may need further investigation to reach the
most efficient resolution. The offering is not appropriate for situations
that require urgent, real-time or phone-based interactions or complex
project analysis and dump analysis issues. Issues of this nature are best
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=============== =============== =============== =====
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[NetworkElf]

Re: Finding a share's directory spec


""Jeffrey Tan[MSFT]"" <jetan@online.m icrosoft.comwro te in message
news:u1fYvnukHH A.4032@TK2MSFTN GHUB02.phx.gbl. ..

Hi,
>
Sorry for letting you wait.
>

Not a problem. Thanks for finding out.

Further discussion with the WMI team shows that LocalService account does
not have permission to access the path for shares. You may view the DACL
on
shared folders in Computer Management->System Tools -Shared Folders ->
Shares. You may right click any share folder in right panel and view the
"Security" tabpage.
>
As you can see, LocalSystem and Administrators will be granted full
control
access to them, while LocalService does not have an ACE entry, which means
the LocalService will have no access to them.
>
Currently, due to the constraint DACL setting on the shared folder, we
have
to run the service under Administrators account or LocalSystem account.

That certainly explains what was going on. I'm going to do some reading
today to find out how to make my service install and use LocalSystem by
default, rather than LocalService.

Otherwise, the service is running like a charm. I appreciate everyone's help
in getting it going. It was a great first project to write. I'm now making a
list of refinements to roll into it at a later time.

Thanks.

ne.