How to? TEE - duplicate output to STDERR

Aug 23, 2010
675
9
In Linux, I can easily achieve copying STDOUT to STDERR by
Code:
ps -al | tee /dev/stderr | wc -l
(I.e. list all processes and display a number of lines at the bottom.)
Is this possible in TCMD?
 
May 20, 2008
11,788
118
Syracuse, NY, USA
Now exactly the way you suggested, but you can get both output and the line count.

Code:
tasklist | tee con: | wc -l

Code:
(snip)
 8908  svchost
 7328  TextInputHost     Microsoft Text Input Application
 2660  tcc
 4784  wc

   Total of 108 processes
110 <--- from wc

Note that (as in your example), wc is also counting headers and footers.
 
May 20, 2008
11,788
118
Syracuse, NY, USA
Thanks, that works.

For anybody interested: CON: is an actual terminal device, not the I/O stream of an application. Thus redirecting output to it overrides any external redirections.

Thу full code now is install-cygwin.btm - Pastebin.com
Yup. I suspect that CON: is a handle which results (in C and the Win32 API) from something like this.

Code:
HANDLE h = CreateFile(L"CONOUT$", GENERIC_READ | GENERIC_WRITE, FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
 

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