Who has it?

**Petar Repac** · Oct 14 '06, 07:55 PM

Re: Who has it?

Demetri wrote:

Anyone know how I can find out if any process has a handle on a specific file?
>

Take a look at

404 - Content not found

http://www.sysinternals.com/FileAndDiskUtilities.html

The page you are looking for does not exist.

maybe you will find what you need there.

Regards,
Petar

**Demetri** · Oct 14 '06, 08:05 PM

Re: Who has it?

No, I don't want an already made utility. I would like to know how to do this
in c#.

Thanks
--
-Demetri

"Petar Repac" wrote:

Demetri wrote:

Anyone know how I can find out if any process has a handle on a specific file?

>
Take a look at

404 - Content not found

http://www.sysinternals.com/FileAndDiskUtilities.html

The page you are looking for does not exist.

maybe you will find what you need there.
>
Regards,
Petar
>

**Michael Nemtsev** · Oct 15 '06, 05:55 AM

Re: Who has it?

Hello Demetri,

See info there
http://www.codeguru.com/Cpp/W-P/syst...icle.php/c2827
and there http://vbnet.mvps.org/index.html?cod...etfileenum.htm

The WinAPI code for this is:

void WhoUsesFile( LPCTSTR lpFileName, BOOL bFullPathCheck )
{
BOOL bShow = FALSE;
CString name;
CString processName;
CString deviceFileName;
CString fsFilePath;
SystemProcessIn formation::SYST EM_PROCESS_INFO RMATION* p;
SystemProcessIn formation pi;
SystemHandleInf ormation hi;

if ( bFullPathCheck )
{
if ( !SystemInfoUtil s::GetDeviceFil eName( lpFileName, deviceFileName ) )
{
_tprintf( _T("GetDeviceFi leName() failed.\n") );
return;
}
}

hi.SetFilter( _T("File"), TRUE );

if ( hi.m_HandleInfo s.GetHeadPositi on() == NULL )
{
_tprintf( _T("No handle information\n") );
return;
}

pi.Refresh();

_tprintf( _T("%-6s %-20s %s\n"), _T("PID"), _T("Name"), _T("Path") );
_tprintf( _T("------------------------------------------------------\n") );

for ( POSITION pos = hi.m_HandleInfo s.GetHeadPositi on(); pos != NULL; )
{
SystemHandleInf ormation::SYSTE M_HANDLE& h = hi.m_HandleInfo s.GetNext(pos);

if ( pi.m_ProcessInf os.Lookup( h.ProcessID, p ) )
{
SystemInfoUtils ::Unicode2CStri ng( &p->usName, processName );
}
else
processName = "";

//NT4 Stupid thing if it is the services.exe and I call GetName :((
if ( INtDll::dwNTMaj orVersion == 4 && _tcsicmp( processName, _T("services.ex e"
) ) == 0 )
continue;

hi.GetName( (HANDLE)h.Handl eNumber, name, h.ProcessID );

if ( bFullPathCheck )
bShow = _tcsicmp( name, deviceFileName ) == 0;
else
bShow = _tcsicmp( GetFileNamePosi tion(name), lpFileName ) == 0;

if ( bShow )
{
if ( !bFullPathCheck )
{
fsFilePath = "";
SystemInfoUtils ::GetFsFileName ( name, fsFilePath );
}

_tprintf( _T("0x%04X %-20s %s\n"),
h.ProcessID,
processName,
!bFullPathCheck ? fsFilePath : lpFileName );
}
}
}

DNo, I don't want an already made utility. I would like to know how to
Ddo this in c#.
D>
DThanks
D>
D"Petar Repac" wrote:
D>

>Demetri wrote:
>>

>>Anyone know how I can find out if any process has a handle on a
>>specific file?
>>>

>Take a look at http://www.sysinternals.com/FileAndDiskUtilities.html
>maybe you will find what you need there.
>>
>Regards,
>Petar

---
WBR,
Michael Nemtsev :: blog: http://spaces.live.com/laflour

"At times one remains faithful to a cause only because its opponents do not
cease to be insipid." (c) Friedrich Nietzsche

**Willy Denoyette [MVP]** · Oct 15 '06, 12:45 PM

Re: Who has it?

Beware that this code uses undocumented exports from ntdll.dll, and requires
that the caller is a member of the "debug users" group!
Which means that this is not something you would ever use in production
code.

Willy.

"Michael Nemtsev" <nemtsev@msn.co mwrote in message
news:1799a79b3b 4df38c8be592a03 a602@msnews.mic rosoft.com...
| Hello Demetri,
|
| See info there
| http://www.codeguru.com/Cpp/W-P/syst...icle.php/c2827
| and there http://vbnet.mvps.org/index.html?cod...etfileenum.htm
|
| The WinAPI code for this is:
|
| void WhoUsesFile( LPCTSTR lpFileName, BOOL bFullPathCheck )
| {
| BOOL bShow = FALSE;
| CString name;
| CString processName;
| CString deviceFileName;
| CString fsFilePath;
| SystemProcessIn formation::SYST EM_PROCESS_INFO RMATION* p;
| SystemProcessIn formation pi;
| SystemHandleInf ormation hi;
|
| if ( bFullPathCheck )
| {
| if ( !SystemInfoUtil s::GetDeviceFil eName( lpFileName, deviceFileName ) )
| {
| _tprintf( _T("GetDeviceFi leName() failed.\n") );
| return;
| }
| }
|
| hi.SetFilter( _T("File"), TRUE );
|
| if ( hi.m_HandleInfo s.GetHeadPositi on() == NULL )
| {
| _tprintf( _T("No handle information\n") );
| return;
| }
|
| pi.Refresh();
|
| _tprintf( _T("%-6s %-20s %s\n"), _T("PID"), _T("Name"), _T("Path") );
| _tprintf(
_T("------------------------------------------------------\n") );
|
| for ( POSITION pos = hi.m_HandleInfo s.GetHeadPositi on(); pos != NULL; )
| {
| SystemHandleInf ormation::SYSTE M_HANDLE& h = hi.m_HandleInfo s.GetNext(pos);
|
| if ( pi.m_ProcessInf os.Lookup( h.ProcessID, p ) )
| {
| SystemInfoUtils ::Unicode2CStri ng( &p->usName, processName );
| }
| else
| processName = "";
|
| //NT4 Stupid thing if it is the services.exe and I call GetName :((
| if ( INtDll::dwNTMaj orVersion == 4 && _tcsicmp( processName,
_T("services.ex e"
| ) ) == 0 )
| continue;
|
| hi.GetName( (HANDLE)h.Handl eNumber, name, h.ProcessID );
|
| if ( bFullPathCheck )
| bShow = _tcsicmp( name, deviceFileName ) == 0;
| else
| bShow = _tcsicmp( GetFileNamePosi tion(name), lpFileName ) == 0;
|
| if ( bShow )
| {
| if ( !bFullPathCheck )
| {
| fsFilePath = "";
| SystemInfoUtils ::GetFsFileName ( name, fsFilePath );
| }
|
| _tprintf( _T("0x%04X %-20s %s\n"),
| h.ProcessID,
| processName,
| !bFullPathCheck ? fsFilePath : lpFileName );
| }
| }
| }
|
|
| DNo, I don't want an already made utility. I would like to know how to
| Ddo this in c#.
| D>
| DThanks
| D>
| D"Petar Repac" wrote:
| D>
| >Demetri wrote:
| >>
| >>Anyone know how I can find out if any process has a handle on a
| >>specific file?
| >>>
| >Take a look at http://www.sysinternals.com/FileAndDiskUtilities.html
| >maybe you will find what you need there.
| >>
| >Regards,
| >Petar
| ---
| WBR,
| Michael Nemtsev :: blog: http://spaces.live.com/laflour
|
| "At times one remains faithful to a cause only because its opponents do
not
| cease to be insipid." (c) Friedrich Nietzsche
|
|

**Demetri** · Oct 16 '06, 12:35 AM

Re: Who has it?

You know, it amazes me how something that seems like a fundamental thing for
an OS is so hard to come by (code wise). Of course I only want production
worthy code. Why is the code to do such a thing so remote and almost
un-findable (if that is a word).

--
-Demetri

"Willy Denoyette [MVP]" wrote:

Beware that this code uses undocumented exports from ntdll.dll, and requires
that the caller is a member of the "debug users" group!
Which means that this is not something you would ever use in production
code.
>
Willy.
>
>
"Michael Nemtsev" <nemtsev@msn.co mwrote in message
news:1799a79b3b 4df38c8be592a03 a602@msnews.mic rosoft.com...
| Hello Demetri,
|
| See info there
| http://www.codeguru.com/Cpp/W-P/syst...icle.php/c2827
| and there http://vbnet.mvps.org/index.html?cod...etfileenum.htm
|
| The WinAPI code for this is:
|
| void WhoUsesFile( LPCTSTR lpFileName, BOOL bFullPathCheck )
| {
| BOOL bShow = FALSE;
| CString name;
| CString processName;
| CString deviceFileName;
| CString fsFilePath;
| SystemProcessIn formation::SYST EM_PROCESS_INFO RMATION* p;
| SystemProcessIn formation pi;
| SystemHandleInf ormation hi;
|
| if ( bFullPathCheck )
| {
| if ( !SystemInfoUtil s::GetDeviceFil eName( lpFileName, deviceFileName ) )
| {
| _tprintf( _T("GetDeviceFi leName() failed.\n") );
| return;
| }
| }
|
| hi.SetFilter( _T("File"), TRUE );
|
| if ( hi.m_HandleInfo s.GetHeadPositi on() == NULL )
| {
| _tprintf( _T("No handle information\n") );
| return;
| }
|
| pi.Refresh();
|
| _tprintf( _T("%-6s %-20s %s\n"), _T("PID"), _T("Name"), _T("Path") );
| _tprintf(
_T("------------------------------------------------------\n") );
|
| for ( POSITION pos = hi.m_HandleInfo s.GetHeadPositi on(); pos != NULL; )
| {
| SystemHandleInf ormation::SYSTE M_HANDLE& h = hi.m_HandleInfo s.GetNext(pos);
|
| if ( pi.m_ProcessInf os.Lookup( h.ProcessID, p ) )
| {
| SystemInfoUtils ::Unicode2CStri ng( &p->usName, processName );
| }
| else
| processName = "";
|
| //NT4 Stupid thing if it is the services.exe and I call GetName :((
| if ( INtDll::dwNTMaj orVersion == 4 && _tcsicmp( processName,
_T("services.ex e"
| ) ) == 0 )
| continue;
|
| hi.GetName( (HANDLE)h.Handl eNumber, name, h.ProcessID );
|
| if ( bFullPathCheck )
| bShow = _tcsicmp( name, deviceFileName ) == 0;
| else
| bShow = _tcsicmp( GetFileNamePosi tion(name), lpFileName ) == 0;
|
| if ( bShow )
| {
| if ( !bFullPathCheck )
| {
| fsFilePath = "";
| SystemInfoUtils ::GetFsFileName ( name, fsFilePath );
| }
|
| _tprintf( _T("0x%04X %-20s %s\n"),
| h.ProcessID,
| processName,
| !bFullPathCheck ? fsFilePath : lpFileName );
| }
| }
| }
|
|
| DNo, I don't want an already made utility. I would like to know how to
| Ddo this in c#.
| D>
| DThanks
| D>
| D"Petar Repac" wrote:
| D>
| >Demetri wrote:
| >>
| >>Anyone know how I can find out if any process has a handle on a
| >>specific file?
| >>>
| >Take a look at http://www.sysinternals.com/FileAndDiskUtilities.html
| >maybe you will find what you need there.
| >>
| >Regards,
| >Petar
| ---
| WBR,
| Michael Nemtsev :: blog: http://spaces.live.com/laflour
|
| "At times one remains faithful to a cause only because its opponents do
not
| cease to be insipid." (c) Friedrich Nietzsche
|
|
>
>
>

**Michael Nemtsev** · Oct 16 '06, 05:35 AM

Re: Who has it?

Hello Willy Denoyette [MVP],

i wonder if there are any better solutions?

WBeware that this code uses undocumented exports from ntdll.dll, and
Wrequires
Wthat the caller is a member of the "debug users" group!
WWhich means that this is not something you would ever use in
Wproduction
Wcode.
WWilly.
W>
W"Michael Nemtsev" <nemtsev@msn.co mwrote in message
Wnews:1799a79b3 b4df38c8be592a0 3a602@msnews.mi crosoft.com...
W| Hello Demetri,
W|
W| See info there
W|
Whttp://www.codeguru.com/Cpp/W-P/syst.../article.php/c
W2827
W| and there
Whttp://vbnet.mvps.org/index.html?cod...etfileenum.htm
W|
W| The WinAPI code for this is:
W|
W| void WhoUsesFile( LPCTSTR lpFileName, BOOL bFullPathCheck )
W| {
W| BOOL bShow = FALSE;
W| CString name;
W| CString processName;
W| CString deviceFileName;
W| CString fsFilePath;
W| SystemProcessIn formation::SYST EM_PROCESS_INFO RMATION* p;
W| SystemProcessIn formation pi;
W| SystemHandleInf ormation hi;
W|
W| if ( bFullPathCheck )
W| {
W| if ( !SystemInfoUtil s::GetDeviceFil eName( lpFileName,
WdeviceFileName ) )
W| {
W| _tprintf( _T("GetDeviceFi leName() failed.\n") );
W| return;
W| }
W| }
W|
W| hi.SetFilter( _T("File"), TRUE );
W|
W| if ( hi.m_HandleInfo s.GetHeadPositi on() == NULL )
W| {
W| _tprintf( _T("No handle information\n") );
W| return;
W| }
W|
W| pi.Refresh();
W|
W| _tprintf( _T("%-6s %-20s %s\n"), _T("PID"), _T("Name"),
W_T("Path") );
W| _tprintf(
W_T("------------------------------------------------------\n") );
W|
W| for ( POSITION pos = hi.m_HandleInfo s.GetHeadPositi on(); pos !=
WNULL; )
W| {
W| SystemHandleInf ormation::SYSTE M_HANDLE& h =
Whi.m_HandleInf os.GetNext(pos) ;
W|
W| if ( pi.m_ProcessInf os.Lookup( h.ProcessID, p ) )
W| {
W| SystemInfoUtils ::Unicode2CStri ng( &p->usName, processName );
W| }
W| else
W| processName = "";
W|
W| //NT4 Stupid thing if it is the services.exe and I call GetName :((
W| if ( INtDll::dwNTMaj orVersion == 4 && _tcsicmp( processName,
W_T("services.e xe"
W| ) ) == 0 )
W| continue;
W|
W| hi.GetName( (HANDLE)h.Handl eNumber, name, h.ProcessID );
W|
W| if ( bFullPathCheck )
W| bShow = _tcsicmp( name, deviceFileName ) == 0;
W| else
W| bShow = _tcsicmp( GetFileNamePosi tion(name), lpFileName ) == 0;
W|
W| if ( bShow )
W| {
W| if ( !bFullPathCheck )
W| {
W| fsFilePath = "";
W| SystemInfoUtils ::GetFsFileName ( name, fsFilePath );
W| }
W|
W| _tprintf( _T("0x%04X %-20s %s\n"),
W| h.ProcessID,
W| processName,
W| !bFullPathCheck ? fsFilePath : lpFileName );
W| }
W| }
W| }
W|
W|
W| DNo, I don't want an already made utility. I would like to know
Whow to
W| Ddo this in c#.
W| D>
W| DThanks
W| D>
W| D"Petar Repac" wrote:
W| D>
W| >Demetri wrote:
W| >>
W| >>Anyone know how I can find out if any process has a handle on a
W| >>specific file?
W| >>>
W| >Take a look at
Whttp://www.sysinternals.com/FileAndDiskUtilities.html
W| >maybe you will find what you need there.
W| >>
W| >Regards,
W| >Petar
W| ---
W| WBR,
W| Michael Nemtsev :: blog: http://spaces.live.com/laflour
W|
W| "At times one remains faithful to a cause only because its
Wopponents do
Wnot
W| cease to be insipid." (c) Friedrich Nietzsche
W|
W|
---
WBR,
Michael Nemtsev :: blog: http://spaces.live.com/laflour

"At times one remains faithful to a cause only because its opponents do not
cease to be insipid." (c) Friedrich Nietzsche

**Willy Denoyette [MVP]** · Oct 16 '06, 07:05 AM

Re: Who has it?

No, while there are other way's to handle this, none can make use of
documented features.
But, when talking about "solutions" , you first need to define the problem.
What exactly are you trying to solve here?.
Why do people want know about "who" has an open handle to a file, for other
reasons than debugging?
Say a program owns the handle to a file called a.txt, while a 2nd program
tries to open the same a.txt file. When the open fails due to a sharing
violation, you know that the file has been opened by another process, right?
Now there are three reasons for the sharing violation:
1. App1 isn't designed for sharing, whatever the sharing mode.
2. App1 is designed to share the file, but app2 isn't designed to share.
3. None of the applications are designed to share the file.

Which one of the above can be solved by knowing who has the file open, and
how are you going to solve it?
The only solution is to "correctly handle" the sharing, if this is not
possible for whatever reason, then you can't run the applications
simultaneously.

Willy.

"Michael Nemtsev" <nemtsev@msn.co mwrote in message
news:1799a79b3b 50648c8bf1f3b6a b4cd@msnews.mic rosoft.com...
| Hello Willy Denoyette [MVP],
|
| i wonder if there are any better solutions?
|
| WBeware that this code uses undocumented exports from ntdll.dll, and
| Wrequires
| Wthat the caller is a member of the "debug users" group!
| WWhich means that this is not something you would ever use in
| Wproduction
| Wcode.
| WWilly.
| W>
| W"Michael Nemtsev" <nemtsev@msn.co mwrote in message
| Wnews:1799a79b3 b4df38c8be592a0 3a602@msnews.mi crosoft.com...
| W| Hello Demetri,
| W|
| W| See info there
| W|
| Whttp://www.codeguru.com/Cpp/W-P/syst.../article.php/c
| W2827
| W| and there
| Whttp://vbnet.mvps.org/index.html?cod...etfileenum.htm
| W|
| W| The WinAPI code for this is:
| W|
| W| void WhoUsesFile( LPCTSTR lpFileName, BOOL bFullPathCheck )
| W| {
| W| BOOL bShow = FALSE;
| W| CString name;
| W| CString processName;
| W| CString deviceFileName;
| W| CString fsFilePath;
| W| SystemProcessIn formation::SYST EM_PROCESS_INFO RMATION* p;
| W| SystemProcessIn formation pi;
| W| SystemHandleInf ormation hi;
| W|
| W| if ( bFullPathCheck )
| W| {
| W| if ( !SystemInfoUtil s::GetDeviceFil eName( lpFileName,
| WdeviceFileName ) )
| W| {
| W| _tprintf( _T("GetDeviceFi leName() failed.\n") );
| W| return;
| W| }
| W| }
| W|
| W| hi.SetFilter( _T("File"), TRUE );
| W|
| W| if ( hi.m_HandleInfo s.GetHeadPositi on() == NULL )
| W| {
| W| _tprintf( _T("No handle information\n") );
| W| return;
| W| }
| W|
| W| pi.Refresh();
| W|
| W| _tprintf( _T("%-6s %-20s %s\n"), _T("PID"), _T("Name"),
| W_T("Path") );
| W| _tprintf(
| W_T("------------------------------------------------------\n") );
| W|
| W| for ( POSITION pos = hi.m_HandleInfo s.GetHeadPositi on(); pos !=
| WNULL; )
| W| {
| W| SystemHandleInf ormation::SYSTE M_HANDLE& h =
| Whi.m_HandleInf os.GetNext(pos) ;
| W|
| W| if ( pi.m_ProcessInf os.Lookup( h.ProcessID, p ) )
| W| {
| W| SystemInfoUtils ::Unicode2CStri ng( &p->usName, processName );
| W| }
| W| else
| W| processName = "";
| W|
| W| //NT4 Stupid thing if it is the services.exe and I call GetName :((
| W| if ( INtDll::dwNTMaj orVersion == 4 && _tcsicmp( processName,
| W_T("services.e xe"
| W| ) ) == 0 )
| W| continue;
| W|
| W| hi.GetName( (HANDLE)h.Handl eNumber, name, h.ProcessID );
| W|
| W| if ( bFullPathCheck )
| W| bShow = _tcsicmp( name, deviceFileName ) == 0;
| W| else
| W| bShow = _tcsicmp( GetFileNamePosi tion(name), lpFileName ) == 0;
| W|
| W| if ( bShow )
| W| {
| W| if ( !bFullPathCheck )
| W| {
| W| fsFilePath = "";
| W| SystemInfoUtils ::GetFsFileName ( name, fsFilePath );
| W| }
| W|
| W| _tprintf( _T("0x%04X %-20s %s\n"),
| W| h.ProcessID,
| W| processName,
| W| !bFullPathCheck ? fsFilePath : lpFileName );
| W| }
| W| }
| W| }
| W|
| W|
| W| DNo, I don't want an already made utility. I would like to know
| Whow to
| W| Ddo this in c#.
| W| D>
| W| DThanks
| W| D>
| W| D"Petar Repac" wrote:
| W| D>
| W| >Demetri wrote:
| W| >>
| W| >>Anyone know how I can find out if any process has a handle on a
| W| >>specific file?
| W| >>>
| W| >Take a look at
| Whttp://www.sysinternals.com/FileAndDiskUtilities.html
| W| >maybe you will find what you need there.
| W| >>
| W| >Regards,
| W| >Petar
| W| ---
| W| WBR,
| W| Michael Nemtsev :: blog: http://spaces.live.com/laflour
| W|
| W| "At times one remains faithful to a cause only because its
| Wopponents do
| Wnot
| W| cease to be insipid." (c) Friedrich Nietzsche
| W|
| W|
| ---
| WBR,
| Michael Nemtsev :: blog: http://spaces.live.com/laflour
|
| "At times one remains faithful to a cause only because its opponents do
not
| cease to be insipid." (c) Friedrich Nietzsche
|
|

**Willy Denoyette [MVP]** · Oct 16 '06, 07:05 AM

VBnet Visual Basic Developers Resource Centre

http://vbnet.mvps.org/index.html?code/network/netfileenum.htm

| |
| | The WinAPI code for this is:
| |
| | void WhoUsesFile( LPCTSTR lpFileName, BOOL bFullPathCheck )
| | {
| | BOOL bShow = FALSE;
| | CString name;
| | CString processName;
| | CString deviceFileName;
| | CString fsFilePath;
| | SystemProcessIn formation::SYST EM_PROCESS_INFO RMATION* p;
| | SystemProcessIn formation pi;
| | SystemHandleInf ormation hi;
| |
| | if ( bFullPathCheck )
| | {
| | if ( !SystemInfoUtil s::GetDeviceFil eName( lpFileName,
deviceFileName ) )
| | {
| | _tprintf( _T("GetDeviceFi leName() failed.\n") );
| | return;
| | }
| | }
| |
| | hi.SetFilter( _T("File"), TRUE );
| |
| | if ( hi.m_HandleInfo s.GetHeadPositi on() == NULL )
| | {
| | _tprintf( _T("No handle information\n") );
| | return;
| | }
| |
| | pi.Refresh();
| |
| | _tprintf( _T("%-6s %-20s %s\n"), _T("PID"), _T("Name"),
_T("Path") );
| | _tprintf(
| _T("------------------------------------------------------\n") );
| |
| | for ( POSITION pos = hi.m_HandleInfo s.GetHeadPositi on(); pos !=
NULL; )
| | {
| | SystemHandleInf ormation::SYSTE M_HANDLE& h =
hi.m_HandleInfo s.GetNext(pos);
| |
| | if ( pi.m_ProcessInf os.Lookup( h.ProcessID, p ) )
| | {
| | SystemInfoUtils ::Unicode2CStri ng( &p->usName, processName );
| | }
| | else
| | processName = "";
| |
| | //NT4 Stupid thing if it is the services.exe and I call GetName :((
| | if ( INtDll::dwNTMaj orVersion == 4 && _tcsicmp( processName,
| _T("services.ex e"
| | ) ) == 0 )
| | continue;
| |
| | hi.GetName( (HANDLE)h.Handl eNumber, name, h.ProcessID );
| |
| | if ( bFullPathCheck )
| | bShow = _tcsicmp( name, deviceFileName ) == 0;
| | else
| | bShow = _tcsicmp( GetFileNamePosi tion(name), lpFileName ) == 0;
| |
| | if ( bShow )
| | {
| | if ( !bFullPathCheck )
| | {
| | fsFilePath = "";
| | SystemInfoUtils ::GetFsFileName ( name, fsFilePath );
| | }
| |
| | _tprintf( _T("0x%04X %-20s %s\n"),
| | h.ProcessID,
| | processName,
| | !bFullPathCheck ? fsFilePath : lpFileName );
| | }
| | }
| | }
| |
| |
| | DNo, I don't want an already made utility. I would like to know how
to
| | Ddo this in c#.
| | D>
| | DThanks
| | D>
| | D"Petar Repac" wrote:
| | D>
| | >Demetri wrote:
| | >>
| | >>Anyone know how I can find out if any process has a handle on a
| | >>specific file?
| | >>>
| | >Take a look at

404 - Content not found

http://www.sysinternals.com/FileAndDiskUtilities.html

The page you are looking for does not exist.

| | >maybe you will find what you need there.
| | >>
| | >Regards,
| | >Petar
| | ---
| | WBR,
| | Michael Nemtsev :: blog: http://spaces.live.com/laflour
| |
| | "At times one remains faithful to a cause only because its opponents
do
| not
| | cease to be insipid." (c) Friedrich Nietzsche
| |
| |
| >
| >
| >

**Demetri** · Oct 16 '06, 03:35 PM

Re: Who has it?

Suppose a file is being written to by some other application (not yours) and
it is a large file (up to 6 or 8 gigs). Your code is watching what is being
written to but would not know that the writting is completed. The only way I
can figure out if the file is done being written is to check if something has
an open handle on it.

Got other bright ideas?

--
-Demetri

"Willy Denoyette [MVP]" wrote:

No, while there are other way's to handle this, none can make use of
documented features.
But, when talking about "solutions" , you first need to define the problem.
What exactly are you trying to solve here?.
Why do people want know about "who" has an open handle to a file, for other
reasons than debugging?
Say a program owns the handle to a file called a.txt, while a 2nd program
tries to open the same a.txt file. When the open fails due to a sharing
violation, you know that the file has been opened by another process, right?
Now there are three reasons for the sharing violation:
1. App1 isn't designed for sharing, whatever the sharing mode.
2. App1 is designed to share the file, but app2 isn't designed to share.
3. None of the applications are designed to share the file.
>
Which one of the above can be solved by knowing who has the file open, and
how are you going to solve it?
The only solution is to "correctly handle" the sharing, if this is not
possible for whatever reason, then you can't run the applications
simultaneously.
>
>
Willy.
>
"Michael Nemtsev" <nemtsev@msn.co mwrote in message
news:1799a79b3b 50648c8bf1f3b6a b4cd@msnews.mic rosoft.com...
| Hello Willy Denoyette [MVP],
|
| i wonder if there are any better solutions?
|
| WBeware that this code uses undocumented exports from ntdll.dll, and
| Wrequires
| Wthat the caller is a member of the "debug users" group!
| WWhich means that this is not something you would ever use in
| Wproduction
| Wcode.
| WWilly.
| W>
| W"Michael Nemtsev" <nemtsev@msn.co mwrote in message
| Wnews:1799a79b3 b4df38c8be592a0 3a602@msnews.mi crosoft.com...
| W| Hello Demetri,
| W|
| W| See info there
| W|
| Whttp://www.codeguru.com/Cpp/W-P/syst.../article.php/c
| W2827
| W| and there
| Whttp://vbnet.mvps.org/index.html?cod...etfileenum.htm
| W|
| W| The WinAPI code for this is:
| W|
| W| void WhoUsesFile( LPCTSTR lpFileName, BOOL bFullPathCheck )
| W| {
| W| BOOL bShow = FALSE;
| W| CString name;
| W| CString processName;
| W| CString deviceFileName;
| W| CString fsFilePath;
| W| SystemProcessIn formation::SYST EM_PROCESS_INFO RMATION* p;
| W| SystemProcessIn formation pi;
| W| SystemHandleInf ormation hi;
| W|
| W| if ( bFullPathCheck )
| W| {
| W| if ( !SystemInfoUtil s::GetDeviceFil eName( lpFileName,
| WdeviceFileName ) )
| W| {
| W| _tprintf( _T("GetDeviceFi leName() failed.\n") );
| W| return;
| W| }
| W| }
| W|
| W| hi.SetFilter( _T("File"), TRUE );
| W|
| W| if ( hi.m_HandleInfo s.GetHeadPositi on() == NULL )
| W| {
| W| _tprintf( _T("No handle information\n") );
| W| return;
| W| }
| W|
| W| pi.Refresh();
| W|
| W| _tprintf( _T("%-6s %-20s %s\n"), _T("PID"), _T("Name"),
| W_T("Path") );
| W| _tprintf(
| W_T("------------------------------------------------------\n") );
| W|
| W| for ( POSITION pos = hi.m_HandleInfo s.GetHeadPositi on(); pos !=
| WNULL; )
| W| {
| W| SystemHandleInf ormation::SYSTE M_HANDLE& h =
| Whi.m_HandleInf os.GetNext(pos) ;
| W|
| W| if ( pi.m_ProcessInf os.Lookup( h.ProcessID, p ) )
| W| {
| W| SystemInfoUtils ::Unicode2CStri ng( &p->usName, processName );
| W| }
| W| else
| W| processName = "";
| W|
| W| //NT4 Stupid thing if it is the services.exe and I call GetName :((
| W| if ( INtDll::dwNTMaj orVersion == 4 && _tcsicmp( processName,
| W_T("services.e xe"
| W| ) ) == 0 )
| W| continue;
| W|
| W| hi.GetName( (HANDLE)h.Handl eNumber, name, h.ProcessID );
| W|
| W| if ( bFullPathCheck )
| W| bShow = _tcsicmp( name, deviceFileName ) == 0;
| W| else
| W| bShow = _tcsicmp( GetFileNamePosi tion(name), lpFileName ) == 0;
| W|
| W| if ( bShow )
| W| {
| W| if ( !bFullPathCheck )
| W| {
| W| fsFilePath = "";
| W| SystemInfoUtils ::GetFsFileName ( name, fsFilePath );
| W| }
| W|
| W| _tprintf( _T("0x%04X %-20s %s\n"),
| W| h.ProcessID,
| W| processName,
| W| !bFullPathCheck ? fsFilePath : lpFileName );
| W| }
| W| }
| W| }
| W|
| W|
| W| DNo, I don't want an already made utility. I would like to know
| Whow to
| W| Ddo this in c#.
| W| D>
| W| DThanks
| W| D>
| W| D"Petar Repac" wrote:
| W| D>
| W| >Demetri wrote:
| W| >>
| W| >>Anyone know how I can find out if any process has a handle on a
| W| >>specific file?
| W| >>>
| W| >Take a look at
| Whttp://www.sysinternals.com/FileAndDiskUtilities.html
| W| >maybe you will find what you need there.
| W| >>
| W| >Regards,
| W| >Petar
| W| ---
| W| WBR,
| W| Michael Nemtsev :: blog: http://spaces.live.com/laflour
| W|
| W| "At times one remains faithful to a cause only because its
| Wopponents do
| Wnot
| W| cease to be insipid." (c) Friedrich Nietzsche
| W|
| W|
| ---
| WBR,
| Michael Nemtsev :: blog: http://spaces.live.com/laflour
|
| "At times one remains faithful to a cause only because its opponents do
not
| cease to be insipid." (c) Friedrich Nietzsche
|
|
>
>
>

Who has it?

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