Vista Tutorial - Redirection of standard out and standard error

All,

I know this has been debated before, but I have searched the old
postings and not found it, so I try to start a new thread on this issue.

I have a legacy application for testing that will write some of its
output to stdout, and some to stderr. I would like to capture the output
from this application so that I can parse the output for the result.

The DOS command for doing this is :

mytest1.exe > test_result.txt 2>&1
mytest2.exe >> test_result.txt 2>&1

Can this be done directly in Powershell??

I have also tried to do

function all_tests {
cmd /c "mytest1.exe > test_result.txt 2>&1"
...

}

When I dot source this file, and call the all_tests function, it hangs,
and when looking at the output in the test_result.txt file i see this:

PS> more test_result.txt
One or more CON code pages invalid for given keyboard code
File not found.
PS>

Can anyone explain to me what this means. Running the command from the
Powershell command line seems to work OK, I only get these messages when
running from a script file.


Hope someone out there can help me

Thanks

Olav

The commands

mytest1.exe > test_result.txt 2>&1
mytest2.exe >> test_result.txt 2>&1

should work fine in PowerShell as the redirection operators are the same.

> When I dot source this file, and call the all_tests function, it hangs,
> and when looking at the output in the test_result.txt file i see this:
>
> PS> more test_result.txt

From the above, somewhere in your all_tests function you're calling "more"
which is probably why it appears to be hanging - more is waiting for input.

-bruce

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Windows PowerShell Technical Lead
Microsoft Corporation
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"Olav Kindt" <kindt@broadpark.no.spam> wrote in message
news:%23OB5NQ6%23GHA.4524@TK2MSFTNGP04.phx.gbl...
> All,
>
> I know this has been debated before, but I have searched the old postings
> and not found it, so I try to start a new thread on this issue.
>
> I have a legacy application for testing that will write some of its output
> to stdout, and some to stderr. I would like to capture the output from
> this application so that I can parse the output for the result.
>
> The DOS command for doing this is :
>
> mytest1.exe > test_result.txt 2>&1
> mytest2.exe >> test_result.txt 2>&1
>
> Can this be done directly in Powershell??
>
> I have also tried to do
>
> function all_tests {
> cmd /c "mytest1.exe > test_result.txt 2>&1"
> ...
>
> }
>
> When I dot source this file, and call the all_tests function, it hangs,
> and when looking at the output in the test_result.txt file i see this:
>
> PS> more test_result.txt
> One or more CON code pages invalid for given keyboard code
> File not found.
> PS>
>
> Can anyone explain to me what this means. Running the command from the
> Powershell command line seems to work OK, I only get these messages when
> running from a script file.
>
>
> Hope someone out there can help me
>
> Thanks
>
> Olav

Bruce Payette [MSFT] wrote:
> The commands
>
> mytest1.exe > test_result.txt 2>&1
> mytest2.exe >> test_result.txt 2>&1
>
> should work fine in PowerShell as the redirection operators are the same.

But they don't seem to work as expected. For testing purpose I have made
a simple program that write one line to stdout, and one line to stderr.
This is what I get when running it:


PROMPT> .\hello.exe
Hello STDOUT!
Hello STDERR!


When I do this:


PS PROMPT> .\hello.exe > mylog 2>&1
PS PROMPT> more mylog
Hello STDOUT!
hello.exe : Hello STDERR!
At line:1 char:12
+ .\hello.exe <<<< > mylog 2>&1
PS PROMPT>

As you can see the content of the file is not what I would expect.
When running the same command in a DOS shell it works fine.


>> When I dot source this file, and call the all_tests function, it hangs,
>> and when looking at the output in the test_result.txt file i see this:
>>
>> PS> more test_result.txt
>
> From the above, somewhere in your all_tests function you're calling "more"
> which is probably why it appears to be hanging - more is waiting for input.
The line more test_result.txt is just the command I used to show the
output of the command that was hanging.

Olav