Re: CreateProcess not working as doc specifies.


"David Bennion" <David Bennion@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:D9716C38-A76F-44BA-985B-0C7F8A4B8159@xxxxxxxxxxxxxxxx
>
>
> "Walter Briscoe" wrote:
>
> First, thanks for your reply.
>
> > In message <5EAB7DEB-B0F9-47D3-8CA7-D64844A1218C@xxxxxxxxxxxxx> of Mon,
> > 13 Jun 2005 13:50:17 in microsoft.public.win32.programmer.kernel, David
> > Bennion <David@Bennion.?.microsoft.com.invalid> writes
> > >I am having some difficulty using CreateProcess() to run a batch file and
get
> > >the same return code as I get from the command shell. I am trying to run
the
> > >batch in the manner suggested by the CreateProcess documentation, but it
> > >fails to run.
> > URL? or quotation.
>
> Here is the URL of CreateProcess:
>
>
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/createprocess.asp
>
> I was just talking about the part of the doc that says to what I quoted
below.
>
> > >
> > >I am posting all of the background information below (sorry if the
wordwrap
> > >from the post obfuscates anything):
> > >
> > >Snippet of doc from CreateProcess() msdn doc:
> > >--------------------------------------------------------
> > > "To run a batch file, you must start the command interpreter; set
> > >lpApplicationName to cmd.exe and set lpCommandLine to the name of the
batch
> > >file."
>
> I had read this to mean "in this special case, set lpApplicationName to
> cmd.exe so that CreateProcess knows you are running something that needs to
> be interpreted with the command interpreter so it can be dealt with
> specially". The doc mentioned
> nothing about needing to pass special parameters to the command interpreter
> (/C) to get it to work, so I figured there *must* be some special handling
> they meant it to take in this case.
>
> I mean, as far as I can tell it makes no difference if you pass NULL in to
> lpApplication name and do it on the command line if you are going to use the
> cmd.exe /C method anway.
>
> > [snipped code]
> >
> > Tried your code in Visual C++ 6.0 SP 5 on Windows 2000 Professional SP4.
> > I snip my results:
> > // OK if(CreateProcess("C:\\winnt\\system32\\cmd.exe", "/C
C:\\DOCUME~1\\ADMINI~1.BRI\\LOCALS~1\\Temp\\david\\t.bat",
> > // US if(CreateProcess("cmd.exe", "/C
C:\\DOCUME~1\\ADMINI~1.BRI\\LOCALS~1\\Temp\\david\\t.bat",
> > // OK if(CreateProcess("C:\\winnt\\system32\\cmd.exe", "/C t.bat",
> > // US if(CreateProcess("C:\\winnt\\system32\\cmd.exe", "t.bat",
> > // OK if(CreateProcess(0, "t.bat",
> >
> > MSDN says about lpApplicationName: "will not use the search path".
> > Does this meet your need?
>
> Not really. I can successfully get the batch file to run, but getting it to
> run as it would run on the command line is the issue. When I run the batch
> file via "cmd.exe /C file.bat" either from the command line or via create
> process, it returns exit code 0. When I run the batch file from the command
> line, it returns exit code 1. But regardless of the way it is run the batch
> file thinks it should be returning 1 (see the results of the "echo
> %errorlevel%" at the end).
>
> At first I thought "oh, it's like unix. The batch file is returning 0
> because the exit code of the 'echo' command is 0. But echo is not actually
> an executable, it's part of the command interpreter so it doesn't affect the
> exit code".
>
> It clearly functions as expected when run from an active command window.

When you execute "cmd.exe /c ...", the return code is not the return code
of the executed command line. It's the return code from cmd.exe which is 0
because it successfully ran the command. As far as I know, there is no
provision for getting the return code from the command. All I can suggest is
that you have your batch file store the error level in a file or Registry key
so that your program can retrieve it.

--
-GJC [MS Windows SDK MVP]
-Software Consultant (Embedded systems and Real Time Controls)
- http://www.mvps.org/ArcaneIncantations/consulting.htm
-gchanson@xxxxxxxx

.

Relevant Pages

  • Re: Task Scheduler 0x80 errors
    ... however it doesn't actually run the batch file as i had ... a mkfile command to create a file as the first line in the batch job. ... The task completed with an exit code of. ... What exactly are you scheduling? ...
    (microsoft.public.win2000.general)
  • Re: Task Scheduler 0x80 errors
    ... AT command, assigning runas service and bath permissions and pretty much ... The task completed with an exit code of. ... by the last command in a batch file if it's a batch file you're ... What exactly are you scheduling? ...
    (microsoft.public.win2000.general)
  • Re: CreateProcess not working as doc specifies.
    ... >>I am having some difficulty using CreateProcess() to run a batch file and get ... >>the same return code as I get from the command shell. ... I can successfully get the batch file to run, ... it returns exit code 0. ...
    (microsoft.public.win32.programmer.kernel)
  • Re: log off command
    ... I simply execute the batch file and let them play... ... If it's by the hour you don't need a script. ... You can logoff a sessionname or a session ID in each case you have to ... Is it possible to issue the command from user1's logon to logoff ...
    (microsoft.public.windowsxp.basics)
  • Re: log off command
    ... I simply execute the batch file and let them play... ... If it's by the hour you don't need a script. ... You can logoff a sessionname or a session ID in each case you have to ... Is it possible to issue the command from user1's logon to logoff ...
    (microsoft.public.windowsxp.basics)
Loading