Executing a command with command line parameters and writing the output to a text file

Question

Executing a command with command line parameters (on Windows 8.1 64bit) works fine

test.pbrt --ncores 1

or

test.pbrt [--ncores 1]

Executing a command and writing the output to a text file (on Windows 8.1 64bit) works fine

test.pbrt > test.txt

How can you combine both of them (without generating a separate bat file)? The following seems to ignore the command line argument and even stops outputting to the command line (only outputs to the text file).

test.pbrt --ncores 1 > test.txt

Edit: .pbrt is an ascii text file, the default program for opening those files is an executable file I created

@MarioWerner output: '"test.pbrt --ncores 1"' is not recognized as an internal or external command, operable program or batch file. — Matthias
– Matthias, Commented Feb 9, 2015 at 10:31
Sorry, test.pbrt "--ncores 1" >test.txt should work. If not, what kind of file is "test.pbrt"? — Mario Werner
– Mario Werner, Commented Feb 9, 2015 at 10:34

Kamil B · Accepted Answer · 2015-02-09 10:34:26Z

2

The ">" directs standard output to a file. So if command stops outputing to console is perfectly OK. As about ignoring the parameters - it can be affected by script (what script is that - You didnn't specified)

answered Feb 9, 2015 at 10:34

Kamil B

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12 Comments

Mario Werner Over a year ago

@Matthias what if you use the full program name / path? "C:\Path\To Your \Program.exe" test.pbrt --ncores 1 >test.txt ?

Eryk Sun Over a year ago

@Matthias, probably you used Explorer to create the association, which doesn't set the association in the HKLM registry hive, but instead stores the association in its own key, and it typically doesn't set it up right to handle command-line arguments. From an elevated command prompt, create and associate the file type, e.g. ftype pbrtfile="Path\To\Program.exe" "%1" %* and then assoc .pbrt=pbrtfile. You'll probably need to select the new pbrtfile filetype association in Explorer as well.

Eryk Sun Over a year ago

@Mathias, you need to use an elevated command prompt (i.e. run as administrator) to set the registry key.

Eryk Sun Over a year ago

@Matthias, here's a bit of background: Windows starts a new process via CreateProcess, but that requires a PE executable (typically .exe) or .bat/.cmd script. Executing other file types is handled by the shell32 function ShellExecuteEx, which calls CreateProcess with the associated open or runas (UAC) command found in the registry. The associations are defined in several places, for both the system and the current user. But the built-in ftype and assoc commands in the command prompt only work with keys set for the system (local machine) under HKLM\Software\Classes.

Eryk Sun Over a year ago

@Matthias, "%1" is the path to the file, in quotes in case it contains spaces. %* is the rest of the command line arguments.

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